Pressure valves regulate and limit the pressure in a hydraulic system. The specific task depends on the requirements of the respective area of application. The choice of valves is decisive for the stability and durability of a system.

ARGO-HYTOS develops and manufactures a wide range of pressure valves - direct or pilot operated, in poppet or spool design, modular or as a screw-in valve. The range is supplemented by variants with PED certification for applications with pressure reservoirs or pressure accumulators.

In the following, you will find out about the various pressure valves available, how they work and what is important when using them in practice.

What types of pressure valves are there?

Pressure valves can functionally be divided into these three categories:

• Pressure relief valves
• Pressure reducing valves
• Pressure control valves

Each of these types fulfills a specific task in the pressure control of hydraulic systems and must be selected according to the operational requirements.

Pressure relief valves protect hydraulic systems from dangerous overpressure. They react directly to the inlet pressure and open as soon as this exceeds the set target value. The excess hydraulic fluid is drained into the tank via the valve, which immediately reduces the pressure in the system.

In the case of directly controlled versions, the valve is triggered directly via the pressure force on a spring-loaded valve element. Pilot operated versions work with a pilot stage that controls the main stage. This is ideal for higher flow rates or sensitive systems. Due to their design, pressure relief valves deliberately generate a significant pressure drop and are therefore not suitable for pressure control.

Pressure reducing valves reduce a high inlet pressure to a defined, constant level at the outlet. This is particularly necessary if individual consumers in the system require a lower operating pressure than others.

In the case of pressure reducing valves with secondary protection, the inlet is throttled if the pressure in the outlet is exceeded and the return to the tank is opened at the same time. This ensures stable pressure ratio control - regardless of pressure fluctuations in the supply.

Pressure control valves ensure continuous regulation of the pressure within a system or sub-circuit. They react to changing loads and volume flows in order to keep a defined operating pressure constant even under dynamic conditions. This not only stabilizes the process, but also reduces energy consumption, wear and noise levels in the system.

Pressure valve technology from ARGO-HYTOS

The demands placed on modern hydraulic systems are as varied as the applications themselves. Whether in mobile hydraulics, in industrial systems or in safety-critical systems with pressure accumulators: Every application requires precisely coordinated pressure control.

ARGO-HYTOS offers a comprehensive portfolio of pressure valves covering a wide range of designs, control principles and approvals. The combination of many years of development experience and practice-oriented system expertise enables individual solutions with maximum reliability, power density and energy efficiency.

Poppet and spool type design

Pressure valves in poppet design are characterized by excellent tightness and a short response time. The conical valve body closes positively and non-positively on the poppet. This ensures reliable sealing without leakage oil even at high pressure. Pressure valves in poppet design are particularly suitable for safety-critical applications or systems with frequent load changes.

Spool valves offer a softer opening characteristic and are more resistant to contamination. Their uniform control characteristics make them ideal for applications with variable volume flows and stable pressure control with a high flow rate.

Installation and modular designs

Built-in valves - designed as screw-in cartridges - offer a compact solution for confined installation spaces and integrated control blocks. They can be installed directly in customer-specific housings, which saves weight, space and costs.

Modular valves, on the other hand, are mounted on standardized sub-bases (e.g. CETOP) and allow easy expansion or modification of existing systems. They offer maximum flexibility, particularly in mechanical and plant engineering, for example for integrating additional safety functions such as secondary or shock valves.

Direct-acting and pilot-operated versions

Direct operated pressure valves react immediately to changes in pressure. They have a simpler design and offer a fast, direct response. This makes them ideal for applications with low to medium flow rates.

Pilot operated valves are used for higher flow rates or when particularly sensitive pressure control is required. They use a pilot stage to control the main spool. This enables flatter pressure curves and precise pressure control even with fluctuating load behavior.

Proportional pressure valves

Proportional pressure valves enable infinitely variable pressure control via an electrical control signal. This is ideal for applications with changing load situations or automated pressure adjustment. ARGO-HYTOS offers proportionally actuated pressure relief, pressure control and pressure reducing valves in CETOP, modular and screw-in versions. Variants with integrated electronics or spool position sensor are optionally available.

Valves with certification in accordance with the Pressure Equipment Directive 2014/68/EU (PED)

Special safety requirements apply to systems with pressure reservoirs or accumulators. For this area, ARGO-HYTOS offers special pressure valves with PED certification in accordance with Directive 2014/68/EU. These valves, such as the SR1A-B2 or the VPP-R-16, guarantee a defined opening characteristic and prevent impermissible pressure peaks.

The certified variants are available with a fixed or adjustable pressure characteristic and are equipped with a secured adjustment screw for tamper-proof configuration. This makes them an indispensable component in safety-critical hydraulic circuits.

How do pressure valves work?

Pressure valves intervene specifically in the hydraulic circuit to control, limit or keep the pressure constant.

Pressure relief valves work as safety components. They open as soon as the pressure in the system exceeds a preset limit value. The excess hydraulic fluid is drained directly to the tank, reducing the pressure. They are opened either by the pressure force on a valve element or via a pre-controlled pilot stage. The valve automatically returns to the closed position as soon as the pressure falls below the limit value again.

Pressure reducing valves regulate the pressure of downstream components. The inlet pressure is reduced to a lower, constant outlet pressure by a control valve. If the outlet pressure rises, the valve closes partially or completely and opens the relief channel to the tank if required. The special feature is the 3-way function, which both regulates the inlet and discharges excess pressure.

Pressure control valves keep the system pressure at a constant level - regardless of load or volume flow fluctuations. They react continuously to changes and adjust the flow rate so that the set operating pressure is permanently maintained. This ensures stable processes, reduces wear and optimizes energy efficiency.

Why are pressure valves indispensable in many areas?

Pressure relief valves safeguard the operation of hydraulic systems and thus protect machines and people from damage. Pressure relief valves perform a protective function. They prevent overpressure in line systems and cylinders, for example in the event of blocked loads or load peaks in mobile machinery, and protect the components from overload and damage.

They also protect the structure of the system in presses and hoists and prevent process interruptions.

Pressure reducing valves enable the supply of different consumers in a complex hydraulic circuit with an adapted pressure level in each case. In agricultural machinery, for example, steering, lifting gear and auxiliary control units require different pressure ranges. The valve regulates the higher system pressure down to a precise, low level and protects sensitive components such as control valves or sensors from overload.

In machine tools, the pressure reducing valve ensures that clamping systems or coolant circuits are not damaged by excessive pressure.

Pressure control valves stabilize the pressure in dynamic systems - regardless of whether the inlet pressure or the volume flow changes. In municipal commercial vehicles, the valve ensures constant pressure at consumers with changing loads. In industry, it keeps the pressure in production plants at the desired level and ensures consistent quality and process reliability.

Would you like to find out more about ARGO-HYTOS solutions in the field of pressure valves? Then get in touch with our team of experts.

I would currently see the tense global economic situation and the simultaneous pressure to innovate towards new solutions for climate neutrality as the biggest challenge. On the one hand, our customers and we have to face the growing competition and the associated cost pressure. On the other hand, machine manufacturers and we are being called upon to make mobile machinery ever more efficient, productive and sustainable.
The necessary adaptation of individual drive components alone will not be enough. Rather, it is necessary to take a holistic view of drive concepts. In this step, fluid technology faces the challenge of reacting to changing market requirements and contributing its own innovations.
The strength of ARGO-HYTOS lies in our knowledge of the construction machine application and in designing our products precisely to meet the needs of its drive concepts and systems.
In addition, the cooperation as a member of the VOITH Group offers the opportunity to overcome the existing limits of our product portfolios together and to break new ground.

What could new drive concepts in the hydraulics sector look like for the construction industry?

We are seeing a multiplication of possible drive concepts. While the diesel-powered combustion engine has usually been the primary energy source up to now, we are seeing a trend towards (battery-powered) electrification, particularly in machines in lower performance classes. This means that the drive systems behind them, such as the working hydraulics, must also adapt to the changing boundary conditions in order to maximize the cost/benefit ratio of the overall vehicle.
In addition to battery-electric solutions, combustion engines are currently often indispensable in mobile machinery, as the required energy and power densities, availability and costs can only be achieved with these.
Nonetheless, the changing requirements here also require a new look at the underlying system architectures and components. This applies regardless of whether diesel, sustainable e-fuels or hydrogen are used as energy source.

Ultimately, it is the user who decides which drive concept will primarily prevail for which construction machine in the future. It is not only acquisition and operating costs, machine performance, availability and robustness that play a key role. Ultimately, there must always be a general technical acceptance of an alternative drive concept - comparable to the increasing acceptance of battery-electric cars on the road.

How do ARGO-HYTOS solutions contribute to sustainability?

We think “sustainability” on various levels in order to operate successfully in an ecological, fair and long-term manner.
On the one hand, this is reflected in the customized design of our hydraulic drive systems and components for our customers. This means performance adapted to the work task and consequently lower energy consumption and reduced greenhouse gas emissions.
On the other hand, the product design itself already holds potential in terms of sustainability.
For example, the choice and weight of materials for components designed for machine service life play just as important a role as the efficient use of materials for filter elements that need to be changed regularly.
Last but not least, we are constantly developing our processing methods and production technologies with the aim of making them as energy-efficient and resource-saving as possible.

ARGO-HYTOS is not exactly associated with alternative or electric drives, what can you tell us about this?

As part of the VOITH Group, we want to live up to our reputation as an innovative technology company in the field of drive technology. Driving forward the energy and mobility transition is a central aspect of VOITH TURBO's mission, which also includes ARGO-HYTOS.

This does not only include the conversion of the energy source and the first energy conversion, the so-called “prime mover”, in our customers' machines. In order to exploit the maximum potential, it is necessary to consider the entire drive concept from the energy source to the final work task such as a movement or force. In the field of mobile machinery, working hydraulics will continue to play an important role in the future and open up new opportunities.
Traditionally, ARGO-HYTOS not only develops and produces pure hydraulic components such as valves and filters, but also designs the appropriate hydraulic system architectures between the drive motor and the final output together with the machine manufacturer. Our system experts in particular have always thought in terms of “alternative” drives - whether electric or powered by a combustion engine.

We are therefore responding to the increasing diversity of new drive concepts and their special features with comprehensive expertise and innovation competence. By working together with VOITH, we can continue to utilize these strengths and drive innovation forward in order to meet the changing and growing needs of the market.

What do you personally expect from bauma 2025? What impetus could the trade fair provide for the construction industry?

Our trade fair appearances require a high level of commitment, permanent presence and the best possible communication. During a bauma week, this can only succeed if your own motivation and the “joy of doing” remain constantly high.
I am looking forward to an intensive exchange with our customers, new contacts, industry experts and old acquaintances.
I hope that the “live trade fair” platform will help the entire construction industry to find ways out of the current difficult situation and spread much-needed optimism. The opportunity is there.

While classic directional control valves only change between open and closed switching positions, proportional directional control valves allow continuous regulation. This is achieved by an electrically controlled proportional solenoid, which moves the valve spool in proportion to the signal strength. This allows the speed and force of hydraulic drives to be precisely controlled.

In this article, we take a detailed look at the design, functionality and diverse applications of proportional directional control valves. Find out in which areas the valves show their strengths and what technical advantages proportional valves from ARGO-HYTOS offer.

The core components of proportional directional control valves

The housing forms the basic structure of proportional directional control valves. It accommodates all internal components and protects them from mechanical influences, contamination and pressure fluctuations. High-strength materials ensure a long service life and reliable function under extreme conditions.

At the center of the valve is the valve piston - an axially movable element that opens or closes the flow paths of the hydraulic oil. Its position determines how much fluid flows through the valve and in which direction it is directed.

The return spring ensures a safe return. It returns the piston to its starting position as soon as there is no longer an electrical control signal. As a result, the valve remains closed or open in the idle state, depending on the design.

The actual control is performed by the proportional solenoid. It generates a force that moves the spool in proportion to the applied voltage or current. The stronger the electrical signal, the further the spool moves and regulates the flow rate accordingly.

High-quality seals are integrated to ensure that the valve remains permanently tight. They prevent leaks and ensure that the hydraulic fluid is controlled in a targeted manner and without unnecessary losses.

The inlet and outlet connections enable optimum integration into the hydraulic system. Various connection configurations are available depending on the design and application.

Sensors are also used in many modern variants. They monitor the piston position or the actual flow rate and provide valuable feedback to the control unit. This data enables high-precision, closed-loop control and helps to increase the efficiency of the entire hydraulic system.

How does a proportional directional control valve work?

The control of a proportional directional control valve is a combination of electrical control, mechanical movement and precise regulation of the volume flow. In contrast to conventional switching valves, which only switch between “open” and “closed”, a proportional valve operates continuously. This allows hydraulic movements to be initiated smoothly, finely dosed and precisely controlled. This is a decisive advantage for machines that work with variable loads.

It all starts with the proportional solenoid that controls the valve. As soon as an electrical voltage or a defined current is applied, the solenoid generates a force that sets the valve piston in motion. The stronger the signal, the further the piston moves and the larger the flow cross-section for the hydraulic oil.

This precise control allows movements to be ramped up smoothly or set precisely to a certain speed.

The valve would not work without the return spring. It ensures that the piston returns to its initial position after the signal is switched off. Without it, the valve would remain uncontrolled in any position. Additional sensors, which can be optionally installed in modern valves, monitor the exact position of the piston or the current flow rate. This information is fed back to a control unit, resulting in highly dynamic, closed-loop control. The valve thus adapts to changing conditions in real time. This is an indispensable feature in modern hydraulic systems where milliseconds count.

Thanks to this ingenious mode of operation, proportional directional control valves are ideal for applications that require maximum precision and efficiency. These include, for example

• Machine tools
• Presses
• Mobile machines

Directional control valves ensure smooth, harmonious motion sequences while protecting the system from unnecessary energy loss and wear.

Where are proportional directional control valves used?

Proportional directional control valves come into their own wherever pressure and volume flow need to be precisely controlled. Thanks to various designs, intelligent control technology and optional sensor technology, they can be optimally adapted to the requirements.

One important area of application is industrial automation. In machine tools, proportional directional control valves control movements such as the clamping of workpieces or the positioning of axes with maximum precision.

Presses benefit from precise control of the pressing pressure and speed. In injection molding machines, the injection pressure and the speed of the plastic flow are precisely controlled. The valves also ensure smooth movements in assembly systems - for example when positioning robots or conveyor belts.

But the valves are not only indispensable in stationary systems. Directional control valves are also used in mobile machinery. In construction machinery, for example, they control the precise movement of excavator arms, cranes or loading shovels.

Road pavers use them for the precise control of screeds and augers to ensure even asphalt distribution. They are also used in agricultural machinery - for example when lifting and lowering attachments on tractors or harvesters. In forestry, the valves are used to precisely control cutting and gripping tools.

ARGO-HYTOS offers proportional directional control valves in a wide variety of designs - from versions with analog control electronics to valves with integrated position sensors. Depending on the application, they can be controlled directly or pilot-controlled and optionally equipped with CAN bus interfaces or internal feedback.

What makes proportional directional control valves so extremely versatile?

• They enable infinitely variable control of pressure and volume flow for precise movements.
• Their design is flexible - whether as a surface-mounted valve or screw-in valve in spool or poppet design.
• They are available in directly controlled or pilot-controlled versions and can therefore be adapted to different system requirements.
• By integrating position sensors, they can provide precise feedback on the piston position.
• With a CAN bus interface, they can be integrated into modern machine control systems.
• Their fast response time ensures immediate adaptation to control commands.
• They are suitable for a wide range of applications in industry and mobile machinery.
• Their compact design allows easy integration into existing hydraulic systems.
• Thanks to internal feedback, they are optimized for closed control loops and enable dynamic control.
• They contribute to energy efficiency by precisely controlling movements and minimizing power losses.

Optimizing your hydraulic systems together

Proportional directional control valves from ARGO-HYTOS enable precise and efficient control of hydraulic systems. Thanks to their versatility, they can be integrated into a wide variety of applications. They offer an optimum combination of performance, energy efficiency and durability. Whether in industrial systems or mobile machinery, they ensure smooth, precise movements while protecting the hydraulic components from unnecessary wear.

Thanks to continuous further development and state-of-the-art technologies, we at ARGO-HYTOS ensure that your hydraulic systems become more efficient, reliable and adaptable. The integration of sensors, CAN bus interfaces and internal feedback enables intelligent control in real time that adapts to changing operating conditions.

Would you like to optimize your hydraulic systems with innovative and powerful valves? Our experts will be happy to advise you to find the best solution for your individual requirements. Contact us and benefit from our know-how in the development of modern hydraulic technologies. We look forward to working with you to raise the efficiency and precision of your systems to a new level.

Modern filtration systems go far beyond cleaning the hydraulic oil used. They ensure continuous monitoring of the oil quality and create the basis for proactive maintenance strategies. Companies that consistently use such solutions can reduce machine downtimes and sustainably lower their operating costs. As process reliability and resource conservation are more important than ever, optimized fluid maintenance is becoming an indispensable part of any industrial production process.

Find out in this article how ARGO-HYTOS can support your company with state-of-the-art fluid management solutions, because we offer products that optimize the performance of your hydraulic systems.

How does Fluid Management ensure the reliability of hydraulic systems?

Sophisticated fluid management is one of the key components for ensuring long-term machine quality and reliability. Contaminated hydraulic oil or lubricant not only leads to wear-related failures. It also impairs the functionality of systems and significantly reduces energy efficiency.

Around 80% of all failures in hydraulic systems can be directly traced back to contaminated operating fluids. Effective fluid management starts at this point to prevent such problems.

One example of modern solutions are oil service units such as the products in the UMPC2 series from ARGO-HYTOS. These systems are specially designed to efficiently remove contaminants and document the cleanliness class of the oil.

In addition to pure filtration, they also support the user during initial filling or when refilling hydraulic fluids. With automatic functions such as oil dosing and a shut-off function when the target quantity is reached, these devices ensure precise results with minimal effort.

Such systems play a key role in the production process in particular (for example during final assembly). By using high-performance off-line filters, the cleanliness class of the hydraulic oil can be significantly improved right from the initial filling.

This not only ensures the quality of the machine, but also offers additional protection during the warranty period. The documented cleanliness has a positive effect on end user confidence.

Another argument for the use of modern filtration systems is the high potential for savings. Clean operating fluids reduce wear on components such as pumps and valves, thus lowering the costs for spare parts and repairs. In addition, optimized oil conditions can increase the energy efficiency of systems, which offers a further competitive advantage in the face of rising energy costs.

Ensuring machine quality through fluid management is not an isolated process, but an integral part of modern maintenance strategies. With the right systems, it is not only possible to minimize sources of failure. It can also improve the overall performance of the system.

Why is Fluid Management suitable for both initial filling and retrofitting?

The optimization of hydraulic systems begins with the initial filling. Sophisticated fluid management ensures that machines are put into operation with optimally cleaned operating fluids. This step is essential to extend the service life of components such as valves, cylinders and pumps. Even the smallest contamination can cause considerable damage in high-precision systems, and reliably clean operating fluids are therefore essential during commissioning.

In addition to the initial filling, retrofitting also plays a decisive role. Older systems in particular benefit from modern filtration systems that can be integrated into existing systems as bypass solutions.

These systems - such as the tried-and-tested FNAPC series from ARGO-HYTOS - not only offer excellent filtration. They also enable continuous monitoring of oil parameters such as cleanliness, humidity and temperature. Such functions enable predictive maintenance, which avoids unplanned downtime and increases operating efficiency.

The advantages of Fluid Management in daily use

For operators, there are numerous advantages to implementing fluid management. The service life of the machines can be extended many times over, productivity increases and operating costs fall. The simple integration of modern filter units is particularly noteworthy. They can be integrated into existing systems without costly conversions. Thanks to automated functions such as automatic switch-off and simple operation, they are also particularly user-friendly.

The aim should always be comprehensive fluid management that can be used for both new and existing machine solutions. As a system operator, you will immediately benefit from greater reliability, reduced maintenance costs and a significantly longer service life for your systems.

What makes Fluid Management so valuable?

• Sophisticated fluid management during initial filling ensures that machines are put into operation with cleaned operating fluids, preventing damage caused by contamination.
• Modern filtration systems can be integrated into existing systems and continuously improve oil parameters such as cleanliness, humidity and temperature.
• Optimized fluid management systems extend the service life of machine components and reduce wear at the same time.
• Filtration systems are easy to integrate, do not require complex conversions and offer automated functions such as automatic shut-off.
• Operators benefit from greater reliability, reduced operating costs and more efficient machine performance.

Multifunctional design, compact construction

Modern filtration systems combine several functions in a single device and thus represent a versatile added value for your company. The units developed by ARGO-HYTOS combine cleaning, monitoring and protection of hydraulic and lubricating oils in a compact design. This not only enables space-saving installation, but also flexible use in different areas of application.

A key feature of such multifunctional systems is their compatibility with a wide range of fluid types and viscosity ranges. This means that they can be used in existing systems as well as when planning new machines. Automated functions such as automatic shutdown and intelligent energy-saving modes also simplify operation and conserve resources.

The ability of modern filtration systems from ARGO-HYTOS to monitor oil parameters such as cleanliness, humidity and temperature in real time is particularly noteworthy. This creates the basis for proactive maintenance and reduces unplanned downtimes to a minimum. The fast data transmission and documentation of operating conditions also ensures complete traceability, which is essential in many industrial sectors.

With their multifunctional design, our solutions are an excellent choice for companies that want to ensure efficient and reliable fluid maintenance. The systems not only help to extend the service life of machines. They also help to optimize operating costs by minimizing maintenance and increasing efficiency.

Contact us now and get advice from ARGO-HYTOS

Sophisticated fluid management is essential for the reliable and long-term high-performance operation of hydraulic systems. Modern filtration solutions from ARGO-HYTOS offer a wide range of applications - whether for initial filling, retrofitting or continuous monitoring of oil parameters. The benefits are obvious and include a longer machine service life, reduced maintenance costs and optimized operating efficiency.

Would you like to find out more about ARGO-HYTOS solutions or discuss individual requirements? Then contact us to find the right solution for your application. Our team of experts will be happy to provide you with optimum support for your processes.

ARGO-HYTOS suction filters can be used for a wide range of applications. Our solutions in the field of suction filtration are suitable for both open and closed circuits. They are used in the suction line of pumps in hydraulic or lubrication systems. They also ensure the protection of filling pumps in hydrostatic drives.

Learn all about suction filters in this article and discover the benefits of suction filtration for maximum system performance!

How does suction filtration work and what makes suction filters efficient?

Suction filtration performs several crucial tasks in a hydraulic system. The main function of suction filters is to protect pumps and components from harmful particles. These can enter the system through abrasion or external influences such as repairs or oil refills.

Full-flow filtration in the suction line ensures that all impurities are reliably filtered out. The results are greater system cleanliness and reliable pump operation.

In order to maximize wear protection, high-quality filter elements are used for suction filtration. They fulfil their task reliably, even with demanding cleanliness requirements.

Coarse screen elements retain larger particles up to 280 µm. Finer working filters made of cellulose or glass fiber fleece down to a fineness of 16 µm(c). This keeps the hydraulic circuit clean and significantly extends the service life of pumps and system components.

Filter maintenance is a key issue for suction filtration. Regular replacement prevents a dirty filter element from obstructing the oil flow or impairing system performance. For suction filters with a sealing point to the environment, we recommend replacing the filters every 2,000 operating hours or after two years at the latest. This depends on the operating conditions. The finer the filter, the more important this becomes.

A clogging indicator offers clear advantages. It signals the optimum time to change the filter, which avoids unnecessary downtimes and maximizes the service life of the filter.

Screen filters can also be cleaned. The elements can be cleaned and reused using ultrasonic baths, special cleaning agents or mechanical brushing. However, cleaning should not be carried out more than 2–3 times. It is then advisable to replace the filter that has been cleaned several times by a new filter.

Which options improve the efficiency of suction filtration?

Suction filtration can be adapted to individual system requirements using specific options. Clogging indicators ensure that the optimum time for a filter change is not missed. They continuously measure the pressure loss at the filter element and signal when it exceeds a set value.

Optical indicators allow the degree of contamination to be determined on site. Electrical clogging indicators also transmit a signal to the control system. Combined indicators offer the advantages of both variants. They enable predictive maintenance, which minimizes downtimes and optimizes the service life of the system.

A bypass valvea ensures additional operational safety during suction filtration. In the event of a heavily contaminated filter element or increased viscosity (e.g. during cold starts), the valve opens automatically to allow the oil to flow. This is also the case when the filtration reaches its limits.

This reliably protects the pump from cavitation, while the oil flow is guaranteed at all times. A bypass valve provides reliable protection for the entire system, especially under demanding operating conditions.

Extension pipes offer flexible options for adjusting the installation depth of the suction filter. Extensions of up to 500 mm allow the filter to be optimally positioned in the tank. This not only makes installation easier, but also ensures smooth operation in systems with oil tanks of different sizes.

Magnetic system: In suction filters with a magnetic system, the ferromagnetic particles first flow through the influence of a strong magnetic field and are separated there. This protects the filter element and increases the service life.

These options make the use of suction filters more efficient, reliable and adaptable. They ensure that the system remains optimally protected and efficient even under changing conditions.

How does the design influence the performance of suction filters?

The design of a suction filter has a significant influence on its efficiency and performance in the hydraulic system. The correct design of the filter can minimize pressure losses, optimize filtration performance and significantly extend the service life of the pump. The flow principle, choice of material and design are decisive for efficiency.

A key factor is the star pleating of the filter material. Suction filters often have star-pleated filter elements, as this results in a very large filter surface, very low pressure losses and an exceptionally long maintenance interval.

The choice of material also influences the function. Filter housings made of reinforced plastic offer high resistance to shocks and vibrations with a low dead weight. Stainless steel mesh screens ensure a long service life and consistent filtration quality even under high loads.

Advantages of an optimized suction filter design

• An even oil flow reduces pressure losses.
• Robust materials ensure durability.
• A magnet system maximizes filter utilization.
• A compact design saves installation space.
• Durable screen mesh ensures stable filter performance.

It all depends on the right filter fineness

The choice of the right filter fineness has a direct influence on the performance and reliability of a hydraulic system. Each system has different requirements in terms of oil cleanliness. This depends on the type of components, the operating conditions and the desired service life. While coarse filter elements retain coarser impurities, finer elements ensure that even the smallest particles are reliably removed from the oil.

Screen filter elements with a mesh size of 40 to 280 µm are particularly suitable for pump protection. In this area, they fulfill the function of basic protection by retaining coarse particles such as metal abrasion or larger dirt inclusions.

This filter stage is particularly important in systems that are operated under harsh conditions or are filled with oil after repairs. It prevents coarser impurities from entering the pump and causing damage or cavitation.

For more demanding applications, filter elements made of paper or fleece are used, which achieve a fineness of up to 16 µm(c). They reliably filter out even the finest particles and thus guarantee the highest cleanliness classes. Especially in precise control systems or modern high-pressure pumps, this filtration stage prevents premature wear and increases the efficiency of the entire system.

Incorrect filter fineness adjustment, on the other hand, can lead to problems. A filter that is too coarse allows dirt particles to pass through, damaging the components in the long term. If the filtration is too fine, the pressure loss in the system increases. This impedes the oil flow and increases the risk of cavitation.

Contact the experts at ARGO-HYTOS now

A reliable, durable and efficient hydraulic system starts with the selection of the right components. Choosing the right type of filter, the optimum filter fineness and the integration of additional options such as clogging indicators or bypass valves requires technical expertise. A deep understanding of your individual requirements is also necessary. This is where the experts at ARGO-HYTOS come into play.

Thanks to decades of experience in hydraulic technology, we can offer you tailor-made solutions that are a perfect fit for your hydraulic system. Our specialists analyze the conditions of your systems and help you to use suction filters optimally. In doing so, they not only take into account the requirements for filtration performance and pressure loss, but also the cost-effectiveness and long-term reliability of your systems.

Whether you are optimizing an existing system or planning a new project, individual advice pays off. From the selection of the right filter elements to the integration of additional options such as contamination indicators or extension pipes, ARGO-HYTOS is at your side. We offer you precise, efficient and tried-and-tested solutions.

Contact our experts now for a no-obligation consultation. Together, we will ensure that your systems work cleanly, efficiently and trouble-free. Put your trust in our expertise! Rely on filtration solutions that provide optimum protection for your hydraulic systems and extend the service life of your components in the long term!

Particle counters accurately measure the size and number of particles in the oil. This ensures that you can react to contamination at an early stage - long before damage can occur. The devices can be used flexibly - both in stationary systems and in mobile applications.

Thanks to particularly precise measured values, maintenance work can be planned in a targeted manner. This saves costs and also extends the service life of the components in your hydraulic systems.

This article provides you with a compact overview of the functionality and benefits of the ARGO-HYTOS particle counters. Find out everything you need to know about how our particle counters can be used to sustainably improve the performance and reliability of hydraulic systems and drives.

Why is oil cleanliness important in hydraulic systems?

In hydraulic systems, the cleanliness of the oil is crucial for reliable and efficient operation. Even the smallest impurities can have a significant impact, as they increase wear on pumps, valves and cylinders.

This wear not only leads to malfunctions, but in many cases also to premature component failure. Contaminated oil also causes flow losses and impairs the performance of the entire system.

Effects of contaminated oil

• Increased wear: Abrasive particles attack seals, bearings and surfaces.
• Malfunctions: Dirt particles block valves and restrict the mobility of actuators.
• Energy loss: Contamination caused by particles increases the flow resistance and leads to higher energy consumption.
• High repair costs: Premature damage to central components causes expensive downtimes and repairs.

High oil cleanliness significantly reduces these risks. Clean oil extends the service life of components and minimizes both the maintenance required and the costs. Clean oil also enables more stable performance - especially in applications with high pressures and accurate control requirements.

Industry standards such as ISO 4406 are used to ensure the required cleanliness. They classify the particle size and number that can be tolerated in the oil. Regular monitoring against these standards is essential to ensure the efficiency and longevity of hydraulic systems.

By using modern particle counters, filter technology and optimized fluid management, contamination can be precisely detected and controlled. This prevents breakdowns and ensures smooth operation. This is a decisive advantage for companies that depend on the reliable performance of their machines.

How does the OPCount particle counter from ARGO-HYTOS work?

The OPCount from ARGO-HYTOS uses the light extinction method to precisely measure particles in the hydraulic fluid. A beam of light is passed through the fluid. Particles that pass through the light beam cast a shadow on a photodiode. The intensity and duration of the light attenuation is analyzed to determine the size and number of particles.

This method is characterized by its high accuracy and reliability. The technology enables the detection of particle sizes in the range from ≥4 µm to 68 µm.

The OPCount measures the cleanliness classes of the hydraulic oil according to international standards such as ISO 4406, NAS 1638 and SAE AS 4059. These classifications provide a basis for assessing the degree of contamination and monitoring the oil quality. Both online and offline measurements are possible, allowing the OPCount to be flexibly adapted to different applications.

Online measurements enable continuous monitoring of the system directly in the pressure line. Offline measurements, for their part, allow detailed analysis from bottle samples or reservoirs.

Thanks to its versatility, the OPCount can be used in a wide variety of scenarios, such as the following:

• Checking hydraulic fluids before filling a system
• Monitoring during operation
• Quality inspection after filtration

The OPCount can also be used safely in high-pressure environments as it is designed for line pressures of up to 420 bar. The combination of precision, flexibility and robustness makes the OPCount a valuable measuring instrument for ensuring oil cleanliness. It also contributes to the long-term smooth operation of hydraulic systems.

What makes the OPCount particle counter so universal?

The OPCount was developed to enable reliable and precise monitoring of oil cleanliness in a wide range of applications. In hydraulic systems, it ensures continuous monitoring of the fluid condition by measuring particle sizes from ≥4 µm to 68 µm.

This makes the particle counter ideal for the reliable monitoring of hydraulic oils. These are subjected to heavy loads in pumps, valves and cylinders in continuous operation.

In construction and agricultural machinery, the OPCount enables the oil condition to be checked on site. Its robust design and the ability to take samples from pressure lines or reservoirs ensure reliable measurement results even under demanding conditions. In workshops, it can be used for preventive maintenance in order to react to potential contamination in good time.

In industrial processes, for example in pharmaceutical production or aviation, the OPCount ensures accurate monitoring of the hydraulic systems used. In these safety-critical areas, the particle counter minimizes the risk of component failure through real-time measurements and contributes to compliance with strict quality specifications. Thanks to its online and offline functionality, it can be integrated into pressure lines as well as used for manual analyses.

The technical flexibility of the OPCount allows seamless integration into existing systems. Among other things, this is achieved through connectivity via USB or external sensors. With maximum operating pressures of up to 420 bar, it is suitable for both mobile and stationary applications. This makes the particle counter a central component in your process monitoring and maintenance planning.

The advantages of the particle counter from ARGO-HYTOS for your company

The OPCount offers your company decisive advantages to increase the efficiency and reliability of your hydraulic systems. The early detection of impurities in the hydraulic fluid prevents costly breakdowns and unnecessary repairs. This significantly reduces operating costs, as maintenance measures can be planned in a targeted and forward-looking manner.

Precise monitoring helps to extend the service life of machines and systems. Components such as pumps, valves and cylinders are protected against abrasive wear, which increases reliability and operational capability. At the same time, the OPCount makes it easy to document the measurement results. The integrated printer and export options facilitate data processing and ensure complete traceability.

Optimizing your hydraulic systems together

The OPCount from ARGO-HYTOS is a reliable particle counter for the accurate monitoring of oil cleanliness in hydraulic systems. With its ability to detect contamination at an early stage, it makes a significant contribution to reducing operating costs and extending machine service life.

Its flexibility, ease of use and the possibility of seamless integration make it an indispensable tool. Companies that depend on reliable processes and high efficiency in particular benefit from it.

Accurate oil monitoring is not only a decisive factor for the performance, but also for the sustainability of machines. ARGO-HYTOS is continuously developing its technologies to provide companies with even smarter and more efficient solutions for oil cleanliness monitoring.

Would you like to find out more about ARGO-HYTOS hydraulic technology solutions or discuss a specific project with our experts? Then get in touch with us. We look forward to advising you in a personal meeting.

With over 27 years of experience in various leadership roles in production, logistics, and procurement, and a distinguished background in manufacturing companies in the automotive and hydraulics industries, Mr. Markus Munz will significantly contribute to achieving ARGO-HYTOS's strategic goals.

"I am looking forward to leading ARGO-HYTOS into the next growth phase and further expanding our innovative strength," said Markus Munz. "Our customers and partners can rely on a dedicated team working together to continuously improve efficiency, competitiveness, and operational excellence. The focus will also be on optimizing processes and increasing customer satisfaction through flexibility and reliable performance."

Mr. Stefan Schindler, who previously held the position of CMO of the ARGO-HYTOS Group AG, has left the company. Dr. Marcus Fischer will now take over the responsibilities of the CMO in addition to his CEO duties. This consolidation of responsibility for strategy, marketing, sales, and development under the CEO allows ARGO-HYTOS to more quickly and efficiently turn market and technology trends and customer needs into new products.

"Our goal is to drive innovation and offer our customers added value in functionality, efficiency, and economy in the further development of their machines and systems while always being at their side with the highest flexibility and implementation speed. By consistently focusing on market requirements, we strengthen our position as a reliable and forward-looking partner and remain competitive in the long term," said Dr. Fischer.

Hydraulic drives are both efficient and flexible to use. They can be easily adapted to specific requirements and are used to control speeds, power transmission or precise positioning. Modern solutions such as “Power on Demand” from ARGO-HYTOS also reduce energy consumption. This is because the drive is only activated when it is actually needed.

Thanks to their robust design and extremely long service life, hydraulic drives reduce downtimes and significantly increase the efficiency of machines. Find out all about the solutions and benefits of hydraulic drives from ARGO-HYTOS in this article!

Hydraulic drives: Efficient power transmission for demanding applications

Hydraulic drives are used in many branches of industry to move machines and systems with great precision and power. The drives efficiently transmit signals, force, torque and energy via the hydraulic fluid.

The high power density of these drives is particularly noteworthy. Large forces are generated in a small space. This means that both compact and powerful designs can be realized in a wide variety of machines - from smaller machine tools to large construction machines.

Hydraulic drives are also characterized by particularly low wear. Thanks to lubrication by hydraulic oil, the components are less susceptible to wear - even under high loads. This not only ensures a long service life for the components, but also reliable operation under demanding conditions.

The precise control makes hydraulic drives the first choice for applications where a high level of accuracy is required. By regulating movement, force and torque, the drives ensure precise positioning of the axes of machine tools, for example. If required, this is also possible in tolerance ranges of a few hundredths of a millimeter.

The combination of ductile materials and the hydraulic fluid's ability to absorb shocks and impacts extends the service life of the mechanical components and increases the reliability of the system.

What are the advantages of hydraulic drives?

• High power density
• Low wear
• Precise control
• Impact and shock absorption
• Flexibility

What are the main components of hydraulic drives?

Hydraulic drives consist of several key components that work together to achieve particularly efficient conversion and transmission of energy. Each of these components plays a specific role in the overall process and contributes to the performance of the system.

The hydraulic pump is at the heart of a hydraulic drive. It generates pressure and volume flow, without which energy transmission would not be possible.

Actuators, such as hydraulic cylinders and hydraulic motors, convert the hydraulic energy generated by the system into mechanical movement.

Control blocks and valves regulate the flow of hydraulic fluid and control the direction, speed and force of the actuators.

On the one hand, the hydraulic fluid serves as an energy carrier; on the other hand, it also lubricates the components within the drive, thereby preventing excessive wear. Hydraulic fluid also acts as an effective coolant that dissipates the heat generated in the system.

The task of the lines and hoses is to transport the hydraulic fluid through the system. They have to withstand high pressures and are therefore designed to be particularly robust and durable.

Filters and coolers ensure that the hydraulic fluid remains clean and at operating temperature over long periods of time. These components maximize the service life of the system by preventing contamination and excessive heat build-up.

Decentralized hydraulics with “power on demand”

Decentralized hydraulics are based on the principle of providing hydraulic power directly at the point of use. This means that it does not have to be distributed from a central source via long pipes. Instead, decentralized hydraulics involves installing smaller, independent units that are connected directly to the consumer.

This concept reduces the distance that the hydraulic fluid has to travel. This also minimizes the losses that normally occur during transmission via pipes.

One of the main advantages of decentralized hydraulics is its flexibility. The systems can be quickly and easily adapted to changing operating conditions.

Decentralized hydraulic systems are also characterized by reduced heat generation. In conventional, centralized hydraulic systems, high flow losses or throttling often occur, which generate heat. By providing the power locally, the waste heat in the system is reduced.

This not only extends the service life of the hydraulic components, but also reduces the need for additional cooling systems. As less energy is lost in the form of heat, the overall performance and reliability of the machine can improve.

Applications in mobile machinery

Decentralized hydraulic systems are used in mobile machines such as excavators or agricultural vehicles. This allows the available hydraulic power to be utilized as efficiently as possible. By using smaller, local pumps and intelligent controls, the power can be provided as required. This significantly reduces energy consumption and increases machine flexibility at the same time.

Possible applications

• Miniature pumps on the actuators, which can be switched on and off as required, offer efficient use of hydraulic power.
• By using variable-speed drives, the speed can be adapted to the current power requirement and throttle losses can be reduced.
• With an intelligent control system that uses sensors to monitor the power requirement, the power supply can be adjusted in real time.
• The use of several hydraulic circuits in one system (multi-circuit applications) makes it possible to control several functions simultaneously or independently of each other.
• With demand flow control, the pump only ever delivers the required amount of hydraulic fluid.

Application in industrial automation

In industrial automation, decentralized hydraulics offer advantages in terms of flexibility and scalability. Systems can be easily expanded or adapted and downtimes can be minimized thanks to a decentralized structure.

Advantages

• Additional control units can be easily integrated without having to redesign the entire system.
• In a decentralized system, a fault remains limited to one unit, allowing other parts of the system to continue working.
• Each unit can be serviced independently, reducing maintenance times and increasing productivity.

“Power on Demand” from ARGO-HYTOS

The “Power on Demand” system from ARGO-HYTOS is a compact and intelligent, decentralized hydraulic solution. The system is based on BLDC technology (brushless DC motors). This unit combines tank, pump, motor, control unit and the complete valve technology in one compact system. This was specially developed for use in mobile machines.

The control is pressure-, speed- or position-based, which enables flexible adaptation to the requirements of the application.

Advantages of the “Power on Demand” system

• The system minimizes energy losses thanks to the short wiring distances and demand-oriented operation.
• A particularly robust design, the use of proven components and the user-oriented plug & play approach ensure simple integration and low maintenance.
• The “Power on Demand” system is very quiet in operation and is characterized by low energy consumption and minimal heat generation.

Would you like to find out more about our hydraulic drive solutions? Would you like to discuss the versatile application possibilities of “Power on Demand” and other hydraulic solutions in a personal meeting? The ARGO-HYTOS team of experts will be happy to help you find the right solution for your specific requirements.

Get in touch with us today and discover the benefits of our innovative hydraulic solutions for your applications. Visit our contact page and arrange your non-binding consultation appointment!

I am very pleased about the trust that the Board of Directors has placed in me by appointing me CEO of ARGO-HYTOS. I know about the strength of ARGO-HYTOS from my past 17 years with the company. Together with our strong global teams, it will be my pleasure to lead the company into a successful future.
Our current number one challenge is for sure the unfavorable market environment with recessions in nearly all industries and regions we are serving. Additionally, this is coupled with the negative consequences of a high inflation period on material, labor and energy costs after COVID-19. We are taking the needed measures to adapt ourselves to the market demands and are preparing a lean organizational structure for further profitable growth in the future.
Opportunities I see many for us, we simply need to recall our strengths and the value propositions of ARGO-HYTOS, such as products with an excellent performance and quality, an extensive know-how of markets, being close to our customers, innovative technical solutions for various applications and not to forget, speed and flexibility to the market. We have to recall and foster these strengths to continue to be recognized as an innovative and reliable partner for our customers.

What leadership principles do you value most and how do you plan to implement them at ARGO-HYTOS?

All principles we have defined in our ARGO-HYTOS leadership program are important. Today, I would like to emphasize the principles “inspiring action” and “self-reflection”. It is our duty as managers and leaders to motivate and inspire our teams to seize our opportunities and solve given challenges. We need to explain the big picture and strategic direction we want to take. For this we set ambitious and smart goals and have to provide guidance to our employees as well. We act as a team and are in close exchange and communication, be it on the management or operational level. I regularly explain my view on our way forward in our management and team meetings.
Additionally, as CEO of a mid-size company, I will be closer to our sales teams and our customers in the future.
Self-reflection is of great importance, too. We must ask ourselves regularly whether we are on the right track, whether we are taking the right measures and whether these still fit in with a changing environment. We need to calibrate our actions from time to time. Getting regular feedback from teams and peers helps us to develop as individuals and as a team and to reflect on our own behavior.

If we traveled a few years into the future, what would you like to have achieved at ARGO-HYTOS?

I see ARGO-HYTOS as a strong player in the hydraulic market, especially in off-highway applications. We will not be the full-liner, not providing a huge range of all hydraulic products, but be recognized as filtration, analytics and system solution supplier by our OEM and distributors, providing highly efficient solutions with an excellent cost-benefit ratio, following our mission and purpose – “EVERYTHING HYDRAULIC BEYOND EXPECTATIONS”. We are seen as a development partner supporting our customers in making their products ready for the technological transition in off-highway towards more efficiency and sustainability while maintaining high productivity.
I see us as a solid pillar and strong division in VOITH Turbo, representing one of the growth areas of VOITH. By then, our global footprint has significantly grown in Asia and Americas.

How do you see ARGO-HYTOS contributing to the broader industry and global challenges, such as sustainability and technological advancements?

I strongly believe that hydraulics will play an important role in future off-highway machines and industrial applications. We are contributing to sustainability already today with efficient products, be it with our filters or valves. With better efficiency in filtration, we achieve longer lifetime and save resources. With our piloted spool-in-spool design of proportional valves, we save energy, just to give two examples.
Our R&D is working on new solutions for even higher energy efficiency, like the hydraulic power-on-demand approach or load sensing solutions, providing hydraulic power depending on the demand of the machine, following the “just enough” principle. Furthermore, in cooperation with our colleagues at VOITH Turbo, we are working on additional drive solutions for electrified machines, enlarging our future product offering.

What role do you see digital transformation playing in the future of ARGO-HYTOS and how will it impact the company’s operations?

Digital transformation plays a role in nearly all areas of our business. Some examples: We are using an AI-based expert tool to support our sales in customer service. We are offering our products, especially for our distribution partners, in a web shop. With the implementation of our new ERP-backbone SAP S/4 and related IT solutions, we will extend digitalization in our plants in logistics, in the automation of processes, digital shopfloor management and maintenance of machines.
Our products also benefit from digitalization, for example by providing digitally controlled assistance systems for automized or autonomous machines, by monitoring the condition in our customer’s machines or by providing digital twins of our products in the future, for easy selection and operation.

Whether in mobile machines or industrial applications: The high-quality poppet valves from ARGO-HYTOS increase the performance and efficiency of your systems. Find out all about the technical advantages of poppet valve technology in this article.

How are poppet valves technically designed?

Poppet valves consist of a housing, a valve seat, a spring and a movable valve element. The housing protects the internal components from external influences. The valve seat acts as a sealing surface that regulates the flow of the fluid. These components ensure a reliable seal and prevent the fluid from flowing through the valve when it is closed.

The movable valve element - often in the form of a cone or ball - is actuated by the pressure difference and the spring. When closed, the spring presses the valve element against the seat, interrupting the flow.

If the pressure in the system exceeds the set value, the force of the fluid works against the spring. This lifts the valve element, allowing the fluid to flow through.

The function of poppet valves is based on the precise movement of the sealing element. When opening, the element moves away from the seat to release the flow. The valve element is returned to the closed position by the spring force when the pressure in the hydraulic system drops. The spring force ensures that the valve reacts quickly and reliably and interrupts the flow when required.

ARGO-HYTOS poppet valves are designed to handle high operating pressures while allowing precise control of the fluid flow. The choice between poppet and ball seat valves depends on the specific application. Cone poppet valves ensure better sealing at higher pressures, while ball poppet valves are particularly easy and reliable to use.

What are the features of the different poppet valves?

Poppet valves are characterized by their different designs, each of which offers specific applications and advantages. The most common types are ball poppet valves, cone poppet valves and disc poppet valves.

The advantages of ball poppet valves

Ball poppet valves use the name-giving ball as a sealing element. It prevents the fluid from flowing back by being pressed onto the seat by the fluid pressure. This design is often used in check valves, where it reliably prevents the backflow of fluids. Ball poppet valves are particularly robust and can work effectively under various conditions, as the ball fits easily into the seat.

• They are easy to manufacture and therefore inexpensive.
• They are particularly effective as a check valve. This is because the ball is pressed firmly onto the seat by the fluid pressure and thus prevents backflow.
• Thanks to their simple design, ball poppet valves are insensitive to contamination and mechanical loads.

The advantages of cone poppet valves

Cone poppet valves have a ground, guided cone sealing element that enables very precise sealing. This design requires a high degree of accuracy in the manufacture of the cone to ensure optimum sealing. Due to their versatility, poppet valves are often used as pressure relief valves, check valves or directional control valves. They offer excellent tightness and are ideal for applications that require precise flow control.

• The ground cone provides a precise seal, which is particularly important for applications with high pressure requirements.
• The cone poppet valve can be used as a pressure relief valve, check valve or directional control valve, making it flexible for different system requirements.
• The cone shape provides an efficient seal, minimizing leakage and improving the performance of the entire hydraulic system.

The advantages of disc poppet valves

Disc poppet valves function by means of a plate-shaped sealing element with a small stroke range and large cross-section. These valves are designed for applications in the low pressure range. They are often used as shut-off valves or for simple pressure control - for example in filter elements. The cross-section enables a high flow rate with minimal pressure loss.

• The large cross-section allows a high flow rate at low pressure. This is ideal for applications with low pressure requirements.
• The plate-shaped design enables a small stroke range, which facilitates use in space-limited applications.
• These valves are suitable for applications such as filter elements where simple and cost-effective pressure control is required.

What makes poppet valves efficient and reliable?

Poppet valves provide a positive and non-positive seal that completely prevents leaks. This feature eliminates the need for additional leakage oil lines and maximizes system performance.

Thanks to their design, poppet valves open immediately on actuation and have a short stroke, resulting in a fast response time. This is particularly useful in applications where fast control is required - for example in high-speed machinery and precision control applications. The simple design of the poppet valves results in low costs in relation to the long service life.

Due to their design, poppet valves are less susceptible to contamination. The basic design minimizes the ingress of particles, which reduces maintenance requirements and extends the service life of the valve.

Poppet valves are often designed as pilot operated valves, allowing them to work with lower actuating forces. This feature reduces energy consumption and enables the use of smaller actuator elements. The long service life of poppet valves helps to minimize downtimes and ensure operational safety.

Poppet valves from ARGO-HYTOS

ARGO-HYTOS offers a wide range of poppet valves that meet various requirements in hydraulic systems. The available valve types include directional control valves, check valves, non-return valves, throttle check valves and pressure relief valves. These valves are available in both direct-operated and pilot-operated versions. Depending on the requirements, the valves can be used as screw-in or modular valves.

The valves are actuated either magnetically or hydraulically - depending on the specific application. For special applications, ARGO-HYTOS also offers valves that are suitable for potentially explosive environments. The explosion-proof valves are certified to ATEX/IECEx standards and offer maximum safety in demanding environments.

The selection and dimensioning of the valves depend on the specific requirements of the application. These include the pressure range, the volume flow and the mode of operation (normally open or normally closed). For applications that require precise control and high flow capacities, we recommend the use of valves with particularly fast response times.

Areas of application for ARGO-HYTOS poppet valves

Valves from ARGO-HYTOS are used in numerous applications. In mobile machinery, such as excavators and rollers, poppet valves ensure the precise control of hydraulic systems that perform lifting and lowering movements. In agricultural vehicles, including tractors and harvesting vehicles, poppet valves ensure even power transmission. In this way, they help to optimize fuel consumption.

In municipal utility vehicles used for road maintenance and cleaning, poppet valves control complex hydraulic systems. Poppet valves are also indispensable in industrial applications. In injection molding machines, they ensure precise motion sequences or provide stable pressure control in hydraulic presses. In CNC machines, they contribute to the precise positioning of machine tables and axes.

Learn more about poppet valves from ARGO-HYTOS

ARGO-HYTOS poppet valves are an efficient, cost-effective solution for a wide range of hydraulic applications. Their robust design and ability to handle high pressures and flow rates make them a valuable component of modern hydraulic systems. By combining precise control, minimal leakage and fast response time, poppet valves help to optimize system performance. They also reduce operating costs.

Would you like to find out more about our portfolio or design a customized solution for your hydraulic systems with our experts? Then get in touch with us and let our experts advise you in a personal meeting!

A pressure relief valve is primarily used for safety. It has the task of limiting the pressure in a system. In this way, it protects the hydraulic components installed in the system and the connected consumers from excess pressure.

In this article, you will learn how pressure relief valves work and how they are used in various applications. Discover how ARGO-HYTOS optimizes the performance and safety of your hydraulic systems with precise and reliable solutions.

What is the basic principle of pressure relief valves?

A pressure relief valve is used in hydraulic systems to limit the pressure in a system. In the rest position, the pressure relief valve is closed. It is set to a specific opening pressure that corresponds to the maximum permissible pressure in the system.

A pressure relief valve reacts to the pressure in the flow direction upstream of the valve. As soon as the pressure in the system reaches the set value, the valve opens and returns the excess volume flow directly to the tank. When the pressure has dropped to a safe level again, the valve closes automatically. This ensures that the hydraulic system remains within safe operating limits and prevents damage to components such as hoses, pumps and cylinders. This extends the service life of the equipment and increases operational safety.

What types of pressure relief valves are there?

Direct operated pressure relief valves and pilot operated pressure relief valves are the two types of pressure relief valves used in hydraulic systems.

Directly controlled pressure relief valves

• The valve opens against a closing force, which is usually applied by a spring. If the pressure drops, the valve closes again. One example of such a valve is the SR1A-B2/HxxL-CE1017 pressure relief valve from ARGO-HYTOS. It increases safety in hydraulic systems thanks to its outstanding stability and low hysteresis.
• These valves are usually used for small to medium volume flows of up to around 60 l/min. They are ideal for applications where precise pressure control and fast response to pressure changes are required.

Pilot operated pressure relief valves

• These pressure relief valves consist of a main stage and a pilot stage. The pilot stage continuously monitors the pressure in the system. If the pressure exceeds the preset value, the main stage opens. As soon as the pressure falls below the set pressure again, the pilot stage closes and the main stage follows. One example is the VPN2-10/MR pressure relief valve from ARGO-HYTOS, which offers high flow rates and excellent pressure control.
• Pilot operated pressure relief valves allow a smaller flow rate spread, resulting in a flatter pressure rise as the flow rate increases. These valves are used for larger volume flows and are particularly suitable for main pressure safety devices.

ARGO-HYTOS offers a wide range of pressure relief valves that are optimized for specific applications as well as for general hydraulic systems. The valves make a significant contribution to the operational safety and efficiency of hydraulic systems. They do this by preventing overpressure situations and thus extending the service life of the components.

Which construction types of pressure relief valves exist?

The choice between poppet and spool designs for pressure relief valves depends on the specific requirements of the application. These include:

• Pressure range
• Volume flow
• Precision of pressure control

Poppet valves are characterized by their tightness and precision. They react quickly to pressure changes. This makes them the first choice for applications where fast and precise pressure control is required.

Spool valves offer better control and enable flatter characteristic curves. This means that the pressure increase is lower as the volume flow increases. They are more robust and can handle larger flow rates, making them suitable for applications where high flow rates are required.

Built-in valves and modular designs offer different advantages depending on the specific application and space requirements. Built-in valves are relatively easy to install. They are compact and space-saving, making them ideal for applications with limited space.

Modular versions offer greater flexibility. They can easily be used and retrofitted in conjunction with Cetop valves. As a result, additional functions such as secondary safety devices and shock valves can be easily integrated. This modularity enables adaptation to different system requirements and provides a flexible solution for complex hydraulic systems.

Application of pressure relief valves in hydraulic systems

Pressure relief valves are used in a wide range of applications in hydraulic systems to ensure safe and efficient operation. Their primary task is to protect the system from overpressure.

For primary protection, pressure relief valves should be located near the pump and secured against unauthorized adjustment. This location ensures that the pressure is controlled immediately before it affects other parts of the system.

For secondary protection, pressure relief valves can be installed at other strategic points in the hydraulic system. For example, they can be placed downstream of other valves or on consumers such as cylinders or motors to provide additional protection. This secondary protection not only protects the components from overpressure. It also serves as protection against external influences or forces that could act on the system.

For applications that fall under the Pressure Equipment Directive 2014/68/EU, such as pressure vessels and systems, ARGO-HYTOS offers special PED-certified and TÜV-tested pressure relief valves. They not only ensure operational safety, but also meet the legal requirements for pressure systems.

The strategic positioning and selection of suitable pressure relief valves are crucial for the protection and durability of hydraulic systems. They make a significant contribution to preventing system failures and ensuring safety in demanding industrial applications.

Examples of the use of pressure relief valves in practice

Pressure relief valves from ARGO-HYTOS are used in a wide range of practical applications. They are used in construction machinery to protect hydraulic systems from overpressure and thus ensure the safety and longevity of the machines. In industrial hydraulic systems, they ensure precise pressure regulation and prevent damage to sensitive components.

They are also used in agricultural technology. There, they ensure the safe operation of hydraulic systems in tractors and other agricultural machinery.

Expert advice on pressure relief valves

The various types of pressure relief valves and their diverse designs offer a tailor-made solution for almost any hydraulic application. Whether for primary or secondary protection or for special requirements in accordance with the Pressure Equipment Directive 2014/68/EU: choosing the right valve is crucial for the efficiency and safety of your hydraulic system.

ARGO-HYTOS offers a wide range of pressure relief valves. They are optimized for both small and large volume flows and impress with their high precision and reliability.

Would you like to find out more about pressure relief valves? Or are you interested in a customized solution for your application? Then get in touch with the experts at ARGO-HYTOS. We offer you comprehensive advice and support in selecting and implementing the most suitable solution for your needs.

Visit our contact page. Get advice from experienced specialists to fully exploit the potential of ARGO-HYTOS pressure relief valves for your company.

By detecting and analyzing wear particles in real time, machine failures can be prevented at an early stage and the service life of components can be extended. The use of OPCom FerroS particle monitors is particularly important in applications such as ball screw drives and other heavily loaded systems.

The sensors are a cost-effective solution for wear monitoring and help to reduce operating and follow-up costs. In this article, you will learn everything you need to know about the functionality and benefits of OPCom FerroS particle monitors from ARGO-HYTOS. We will also tell you how you can contribute to the optimization of your machines.

The functional principle of OPCom FerroS particle monitors

The OPCom FerroS particle monitors from ARGO-HYTOS are advanced wear sensors. They are used for the continuous monitoring of ferromagnetic wear particles in hydraulic and lubrication systems. The sensors work according to an innovative principle in which ferromagnetic particles are attracted and collected by an integrated permanent magnet.

A central component of the OPCom FerroS wear sensor is a planar coil that is integrated into an oscillating circuit. When ferromagnetic particles hit the coil, the parameters of the oscillating circuit change in proportion to the amount of particles collected.

These changes are converted into normalized values that indicate the degree of saturation of the coil. As soon as the maximum degree of saturation is reached, the magnetic field can be automatically compensated, releasing the collected particles. This makes the wear sensor maintenance-free and enables continuous monitoring of a hydraulic system without the need for manual, time-consuming inspections.

Continuous monitoring by the sensor also makes it possible to record and predict wear processes in real time. This enables predictive maintenance. Potential machine failures can be detected at an early stage and avoided before defects occur.

For example, the OPCom FerroS can be used in wind turbine gearboxes, to monitor the wear of drive components. This can extend the service life of the machines. Expensive, unproductive machine downtimes become largely superfluous.

How does the monitoring of wear particles with OPCom FerroS work?

During the operation of hydraulic systems and machines, the components used gradually wear out. This causes metallic particles to enter the oil, the number of which increases as the element wears. The OPCom FerroS sensor is the first sensor on the market that enables effective monitoring of this type of contamination. It is based on the principle of capacitive measurement of ferromagnetic particles in the oil.

The wear sensor measures the amount of ferromagnetic particles in the oil. It converts this information into a proportional output signal of 4 to 20mA. It indicates the degree of damage to the monitored devices. Continuous monitoring makes it possible to monitor the condition of the machines in real time. In addition, preventive maintenance measures can be planned in good time to avoid expensive breakdowns and repairs.

The OPCom FerroS wear sensor is operated with a voltage of 22 to 33 VDC. It can monitor both fine and larger particles. This enables a comprehensive analysis of the wear situation in the machines. By combining the signals, a complete picture of the machine condition can be created. This enables precise monitoring and timely maintenance.

This technology offers numerous advantages, such as a longer service life for machine components, reduced operating costs and improved machine reliability. The ability to continuously monitor wear particles is particularly important in demanding industrial applications. It significantly improves the efficiency and safety of production processes.

The use of OPCom FerroS sensors in combination with the LubMon Connect cloud solution also enables a modern and comprehensive monitoring solution. It is based on real-time data and supports predictive maintenance. For local usage of this sensor, you can combine it with LubMonVisu.

What are the advantages of OPCom FerroS sensors compared to laser-based monitoring systems?

OPCom FerroS sensors offer a reliable solution for monitoring wear particles in oil that differs significantly from laser-based systems.

A major advantage of the sensor is that it does not require small flow channels. These are often necessary when using laser-based systems. As a result, the sensor can effectively measure both large particles and fine particles below 4 micrometers. This ability to detect a wide range of particles makes it particularly valuable for applications where comprehensive monitoring is required.

Another key advantage of OPCom FerroS sensors is their independence from water and air bubbles in the oil. This is particularly important in gearboxes where such interference factors can occur frequently. This independence enables the sensor to carry out precise measurements. This is because the results are not affected by the presence of water or air bubbles.

The sensor's integrated operating hours counter saves the values even after a power failure. As a result, it continues to work from the last saved value after the interruption. This function enables continuous monitoring and ensures that no operating time is lost.

By detecting wear and damage at an early stage, the OPCom FerroS sensor enables predictive planning of maintenance measures. This helps to minimize downtime and maximize machine efficiency. The sensor also offers various communication options, including an analog 4-20mA output signal and digital interfaces such as RS232, CANOpen and SAE J1939.

Advantages of the OPCom FerroS sensor

These are the advantages of the sensor at a glance:

• Captures both large and fine particles under 4 micrometers
• No interference from small flow channels as with laser-based systems
• Accurate measurements even in the presence of water or air bubbles in the oil
• Ideal for use in gearboxes and other applications with frequent interfering factors
• Reliable performance in demanding environments
• Integrated operating hours counter that stores values even after power failures
• Enables predictive maintenance planning
• Minimizes downtime and reduces operating costs
• No manual inspections required
• Support for machine predictive maintenance
• Can be connected to the ARGO-HYTOS cloud solution

Get advice on the OPCom FerroS sensor from ARGO-HYTOS

The OPCom FerroS sensor from ARGO-HYTOS offers your company a comprehensive solution for monitoring wear particles in hydraulic systems. The precise measurement of both large and fine ferromagnetic particles in demanding environments makes the solution an economical alternative to laser-based monitoring systems.

The sensor has proven itself in gearboxes and wind turbines in particular thanks to its reliable performance and integrated operating hours counter. This saves the data even after a power failure and then continues counting. The early detection of wear enables efficient maintenance planning and minimizes downtimes. This ultimately reduces operating costs and extends the service life of the machines.

Would you like to find out more about how the OPCom FerroS sensor can improve the efficiency and reliability of your machines? Then get in touch with us and let our experts advise you in a personal consultation!

In this article, you will learn how flow dividers and flow combiners work and in which areas of application they are used. We also reveal the advantages of ARGO-HYTOS components.

The general function of flow dividers and flow combiners

Flow dividers and flow combiners are used to precisely regulate the oil flow in hydraulic systems. A flow divider divides the input oil flow into two usually equal volume flows. This enables an even distribution of the hydraulic energy to several actuators. This is particularly important when the synchronized movement of two or more actuators is required.

Flow combiners combine the returning volume flows according to their division or combination ratio to form a discharge flow. This function is essential to combine the return flow from two actuators and ensure uniform movement. Different division ratios can be realized, which increases the flexibility of these components.

A major advantage of flow dividers and flow combiners is that they are largely independent of the load. Even with different load and pressure ratios, they work with high accuracy. This is why the components are mainly used in complex hydraulic applications where precise control is required.

Thanks to their ability to operate independently of load and pressure differences, flow dividers and flow combiners make a significant contribution to the stability of hydraulic systems.

What is the difference between flow dividers and flow combiners?

Flow dividers and flow combiners fulfill different functions in hydraulic systems. A flow divider distributes the input oil flow into two or more equal volume flows, allowing several actuators to be operated simultaneously and synchronously. This enables particularly smooth movement, for example of loading platforms or lifting platforms.

A flow combiner, on the other hand, combines the returning volume flows from several actuators into a single outgoing flow. This function synchronizes the movement of the actuators and ensures that they work evenly.

How do flow dividers and flow combiners from ARGO-HYTOS improve hydraulic systems

ARGO-HYTOS has various models of flow dividers and flow combiners in its portfolio that are characterized by high precision and reliability.

The SFD2F-B4/I flow divider and combiner is designed for volume flows of up to 40 l/min and operating pressures of up to 350 bar. It divides the input oil flow evenly and compensates for deviations using specially matched orifices and compensation springs. This enables a high level of accuracy, even with different loads and pressure ratios.

SFD2F-B4/I is ideal for applications where low volume flows are required and precise synchronization of the actuators is necessary.

The SFD2F-D4/I flow divider and combiner can handle volume flows of up to 150 l/min at 350 bar. Like the B4 model, the D4 also divides the oil flow evenly and ensures precise control of the return flows. Thanks to its robust design and high flow capacity, it ensures reliable synchronization of movements in larger hydraulic systems.

Both models are largely load-independent and offer high accuracy, even with load and pressure differences. These properties make them a reliable solution for various industrial applications. Further details and illustrations can be found in the data sheets.

A special variant in the ARGO-HYTOS portfolio are the so-called flow dividers with end position compensation. These special shapes compensate for the tolerances in the movement of the connected cylinders or motors in their end position. Without such compensation, differences in the end positions of the cylinders or motors could lead to uneven movements. The end position compensation ensures that the actuators operate reliably and with maximum precision at all times.

For which applications are flow dividers and flow combiners suitable in different industries?

ARGO-HYTOS flow dividers and flow combiners are used in numerous applications in the following areas:

• Construction machinery
• Agricultural machinery
• Industry

Their ability to precisely control and synchronize hydraulic systems makes them indispensable components in a wide range of industries.

In construction machinery, flow dividers and flow combiners are often used in synchronization controls. These ensure that two cylinders move back and forth evenly despite different loads.

A typical example is the raising or lowering of loading levels. Without synchronization, the cylinders could work at different speeds, which would cause the load to slip. Flow dividers ensure a smooth process and therefore increase the safety and efficiency of the machine.

Another area of application is the differential lock. It synchronizes the speed between two hydraulic motors. This application is particularly important in vehicles that have to drive on uneven or slippery surfaces.

For example, they ensure a smooth drive on snow, ice, slippery roads and mud. They do this by preventing one wheel from spinning while the other is stationary. This improves traction and ensures better control of the vehicle.

In agriculture, flow dividers and flow combiners help to increase the efficiency and performance of machines such as tractors and harvesters. They enable the hydraulic cylinders to move smoothly, resulting in more precise control and better utilization of the machines.

The hydraulic components are also used in industrial applications. In production systems, they ensure the even distribution of hydraulic energy, which increases the efficiency of the machines and extends their service life. The precise control of the oil flow by flow dividers and flow combiners means that the machines require less maintenance.

The use of flow dividers and flow combiners in various applications significantly improves the performance and reliability of hydraulic systems. The technical components are therefore responsible for higher productivity and a longer service life of the machines. This ultimately makes operation more profitable and efficient.

Contact us for customized solutions for hydraulics

Flow dividers and flow combiners from ARGO-HYTOS are high-quality, technical components that optimize the efficiency and reliability of hydraulic systems in many industries. Their ability to precisely control the flow of oil and synchronize the movement of hydraulic cylinders ensures smooth processes. It also increases safety and productivity - whether in construction machinery, agricultural machinery or industrial applications.

Thanks to the high accuracy and load-independence of these components, irregular movements and traction problems are reliably prevented.

Would you like to find out more about our high-quality flow dividers and flow combiners? Or do you need a customized solution for your hydraulic systems? We will be happy to help you at any time. Simply and conveniently use our contact options and send us your message.

Our team of experts will help you find the optimum solution for your specific, individual requirements. Let us drive your projects forward together and increase the efficiency of your machines. We look forward to your inquiry and to supporting you with your hydraulic challenges.

The Board of Directors of the ARGO-HYTOS Group AG has appointed Dr. Marcus Fischer as the new CEO. He succeeds Erich Hofer, who will be leaving the Group after more than 10 years, the last three of which as CEO.

Mr. Hofer has held the position of CFO since 2017 and CEO since 2021 and will leave the ARGO-HYTOS Group AG in June 2024. We would like to thank Mr. Hofer for his steady commitment to ARGO-HYTOS.

Dr. Marcus Fischer is not a new member of the team. He has been with ARGO-HYTOS for 17 years. He started as Head of Development in 2007, and in 2010 he joined the management of the ARGO-HYTOS GmbH in Kraichtal and simultaneously took on the role of the Group CTO. At the beginning of 2016, he took over the position of the COO of the ARGO-HYTOS Group AG and is responsible for both development and all of the Group's production plants.
Dr. Marcus Fischer is an experienced technology and industry expert who is very familiar with our markets, customers and suppliers. We are delighted to have found an internal successor for the CEO position in him.

Dr. Marcus Fischer comments on his election as follows: "I would like to thank for the trust that has been placed in me with the appointment as CEO and I am very much looking forward to shaping the future of ARGO-HYTOS as the off-highway division of VOITH Turbo in these exciting times of technological change."

Until further notice, Dr. Fischer will perform the dual function of CEO and COO.

Proportional valves enable the fine adjustment of pressure and flow. Thanks to their ability to react quickly to dynamic load changes, they make a significant contribution to increasing efficiency and optimizing machine performance. Find out in this article what advantages proportional valves from ARGO-HYTOS can offer your company.

The advantages of proportional valves

In contrast to conventional switching valves, which only operate in open or closed states, proportional valves offer the option of adopting any intermediate position. This feature makes them a valuable component for the precise adjustment of pressure and volume flow to different operating situations.

The efficient control of hydraulic systems with proportional valves depends on several critical factors. Firstly, the accuracy of the valve control is crucial to ensure an optimal response to load changes. Secondly, the dynamic characteristics of the hydraulic system, such as response time and sensitivity of the control elements, play an essential role in overall efficiency.

With the best possible integration capability of the valves into existing system architectures, seamless function is ensured without extensive adjustments. Proportional valves from ARGO-HYTOS reduce operating costs, improve machine performance and extend the service life of the systems.

Choosing the right proportional valve for optimum system performance

Choosing the right proportional valve is crucial for the performance of hydraulic systems. Which valve is the right one for a specific application depends largely on the individual requirements.

Proportional valves can be divided into different categories, including:

• Proportional directional control valves
• Flow control valves
• Pressure control valves
• 2- and 3-way pressure compensators, which are available from ARGO-HYTOS in built-in and modular design

Proportional directional control valves such as PRM2-04 provide precise control over the position and speed of actuators in a hydraulic system. These valves are ideal for applications that require sensitive control.

Flow control valves such as the SF32P-C3/H are designed to maintain constant flow regardless of pressure fluctuations. This is particularly useful in systems with variable loads.

Pressure control valves such as SR1P2-A2 play a central role in maintaining a constant pressure in a hydraulic circuit. This is true even when load conditions change.

The selection of the right valve type should not only take into account the specific requirements of the application. The ambient conditions under which the valve is operated must also be considered.

How do you determine the correct dimensioning of a hydraulic valve?

The dimensioning of a hydraulic valve is directly dependent on the pressure and volume flow in the application. To ensure the optimum performance of a hydraulic system, the valve must be precisely matched to the actual requirement.

The volume flow that is to flow through the valve largely determines the size of the valve. The pressure that the system must withstand, in turn, influences the choice of material and the design of the valve.

In addition to the specific requirements of the application, users should also consider the ambient conditions such as temperature, contamination and humidity under which the valve will be operated.

With ARGO-HYTOS proportional valves, you can rely on advanced technology and high-quality materials. This ensures that the valves function reliably and deliver precise results even under the harshest conditions.

How is a proportional valve controlled?

A proportional valve is usually controlled by an electromagnetic control unit. It is either integrated into the valve (on board) or mounted externally in a control cabinet. These configurations offer flexible solutions for different industrial applications and make it possible to adapt the control of the valve to specific operating conditions.

Modern control systems offer both analog and digital control options. They ensure precise control over the valve functions and facilitate integration into complex machine systems.

The ability to communicate via CANopen significantly extends the functionality of the valves. The interface enables seamless networking and communication between the various components of a hydraulic system. CANopen is particularly efficient in automated environments where fast and reliable data transmission is required.

There are three different control concepts for proportional valves:

• Systems without feedback
• Systems with internal feedback via a valve position sensor
• Systems with external feedback, where a sensor measures the controlled parameter in the circuit

Systems without feedback are often simpler and cheaper, but offer less precision. Internal feedback improves the accuracy of valve positioning. And external feedback provides the highest control accuracy by adjusting the performance of the system in real time. Each of these concepts has its specific advantages and disadvantages and must be selected according to the requirements of the specific application.

Why is regular maintenance of proportional valves important?

The maintenance and servicing of valves and hydraulic systems ensures a long service life and long-term fault-free operation. Regular inspections ensure that the systems function optimally and that potential failures can be detected and avoided at an early stage.

In particular, compliance with the hydraulic media standards is of crucial importance. Hydraulic oils of classes HM and HV according to ISO 6743-4 should be used,

• to ensure the best properties for operation under variable temperatures and,
• to maximize the aging resistance of the oil.

In addition, the cleanliness of the hydraulic oil must be taken into account in accordance with the ISO 4406 standard. A minimum oil cleanliness class of 19/16/13 must be maintained. The cleanliness classes are important in order to minimize the accumulation of particles in the system. These could otherwise lead to wear or blockages in the hydraulic components.

By adhering to these standards and carrying out regular checks, expensive repairs and system failures can be avoided. Companies that implement proactive maintenance strategies benefit from greater reliability of their machines. They also enjoy an improvement in operational efficiency and an extension of the overall service life of their equipment. Investing in regular maintenance is therefore a critical factor for the long-term reliable, economical operation of hydraulic systems.

What challenges arise when controlling with hydraulic proportional valves?

The control of proportional valves in hydraulic systems poses several challenges. One of the main factors is the sensitivity of the valves to the effects of temperature and contamination. Temperature fluctuations can change the viscosity of the hydraulic oil, which affects the responsiveness and performance of the valve. Contamination in the system can lead to wear and blockages, which further impair functionality.

In addition, proportional valves require a more complex control strategy compared to conventional switching valves. This complexity results from the need to define precise control parameters that are tailored to the specific requirements of the application. Vibrations and instabilities caused by external factors and influences can further complicate control quality. They require robust control mechanisms and precise calibration of the systems.

Discover the possibilities of hydraulic proportional valves from ARGO-HYTOS

ARGO-HYTOS is your competent partner when it comes to reliability and efficiency in sustainable hydraulic systems. Rely on our solutions that are specially tailored to your individual needs. To ensure that you find the optimum solution for your requirements, please get in touch with our team of experts. Simply use our contact form for a personal consultation.

This is particularly important in applications where precise control of movement sequences is essential. Throttle valves contribute to efficiency and precision in automated processes. They are used in a wide range of industrial and mobile applications. ARGO-HYTOS is your high-performance partner when it comes to high-quality throttle valves.

How do throttle valves work and how are they designed?

Throttle valves are used to regulate the oil flow in hydraulic systems with high precision. Their basic technical design makes it possible to change the flow cross-section as required, creating a flow resistance. The modification of the flow cross-section enables precise control of the flow rate. This allows precise control of the movement speeds of hydraulic consumers such as cylinders and motors.

With throttle valves, the volume flow through the valve depends on the opening cross-section and the pressure difference. This results from the pressure upstream of the valve minus the pressure downstream of the valve. The volume flow is calculated as follows:

Throttle valves are available in various designs, which differ in terms of complexity and flow cross-section adjustment options. In their simplest form, the valves have a fixed flow cross-section that provides a constant flow resistance.

More complex variants have an adjustable flow cross-section that allows even finer tuning of the flow rate. This variability makes adjustable throttle valves particularly valuable for applications where high-precision control of the speed of movement is required. By specifically adjusting the flow cross-section, users can optimally adapt the performance of the hydraulic system to the requirements.

Where are flow control valves used?

Flow control valves are always required in hydraulic systems when the focus is on precise control of movement speeds. Their areas of application are diverse and specifically tailored to the requirements of the systems.

The valves are particularly suitable in hydraulic systems in which the load pressures remain relatively constant. In addition, varying the speed of the consumers depending on the load is acceptable or even desirable. This enables flexible adjustment of the system performance without the need for separate control of the extension and retraction speeds.

In addition, certain designs of flow control valves, such as the cone throttle screw-in valves, can function as shut-off valves, which further increases their applicability.

Throttle valves and their areas of application

Throttle valves are characterized by the following features:

• Use with constant load pressures
• No separate control of retraction and extension speed required
• Use as a shut-off valve in certain versions

Practical example: Control of lifting tables and assembly presses

Examples of applications for throttle valves include controlling the lowering speed of lifting tables and regulating the pressing speed of assembly presses. In both cases, the throttle valve enables sensitive adjustment of the speed. This is crucial for the safety and efficiency of operation.

With lifting tables, the precise control of the lowering speed ensures that loads can be lowered safely and in a controlled manner. With assembly presses, the exact adjustment of the pressing speed ensures even and precise processing.

Even more application possibilities with throttle check valves

Throttle check valves significantly expand the range of possible applications even further. These valves enable precise flow control in one direction while allowing unimpeded flow in the opposite direction.

This is particularly useful in applications where speeds need to be controlled in both directions. This feature is also helpful when load lowering is required in hydraulic systems. By throttling the volume flow, the pressure in the system can be controlled more effectively. This leads to improved performance and safety.

How do you make the right choice for throttle valves?

The effectiveness and functionality of hydraulic control systems can be significantly improved by selecting throttle valves that are adapted to the application. The most important criteria that must be taken into account when making a selection include

• Pressure range
• Flow rate (also referred to as volume flow)
• Connection size and type

Throttle valves from ARGO-HYTOS cover a wide range of applications. They offer solutions that are tailored to the specific needs of each hydraulic system.

The following points should be considered when selecting a throttle valve:

• The pressure range must meet the requirements of the hydraulic system.
• The flow rate (volume flow) must match the required speed regulation of the consumers in the system.
• The connection size and type must match the hydraulic connections in the system.
• When selecting throttle check valves, particular attention must be paid to the direction of flow. This is because these valves allow precise control of the flow in one direction. In contrast, they allow the flow in the opposite direction unhindered.

ARGO-HYTOS offers a wide range of flow control valves designed for various industrial and mobile applications. The high-quality valves enable precise control of movement speeds in hydraulic systems and therefore help to optimize system performance.

Maintenance and service life of flow control valves

With regular maintenance of the flow control valves, the functionality and performance of the components can be maintained over the entire life cycle. Flow control valves from ARGO-HYTOS are known for their long service life and low maintenance requirements. The service life of a flow control valve depends on various factors. These include the operating conditions, the quality of the hydraulic oil used and the frequency of maintenance interventions.

To ensure the maximum service life and optimum performance of ARGO-HYTOS flow control valves, we recommend the following measures:

• Check for signs of wear and mechanical damage as part of regular inspections
• Careful removal of dirt and deposits that can impair the mobility of the valve
• Use of high-quality hydraulic oil and regular changes to minimize deposits and wear
• Ensuring that the installation is carried out in accordance with the technical specifications to prevent malfunctions

By observing these maintenance guidelines, the service life of the flow control valves can be extended and unrestricted function can be ensured over long periods of time. Regular maintenance of quality valves from ARGO-HYTOS pays off in the long term. This reduces downtime and significantly lowers the total cost of ownership.

Conclusion: The importance of flow control valves in hydraulic systems

Flow control valves are used to control and regulate hydraulic systems. Their ability to precisely influence the movement speeds of consumers makes them a key component in hydraulic technology. The selection of the right flow control valve, based on pressure range, flow rate, connection size and type, is crucial for the performance of the system.

ARGO-HYTOS offers a wide range of high-quality flow control valves. They are designed for different applications and are characterized by durability and minimal maintenance requirements. Regular maintenance of the valves maximizes their service life and ensures the efficiency of the entire hydraulic system.

The experts at ARGO-HYTOS will be happy to help you select the optimum flow control valves at any time. Contact us to find out more about our products. We will also be happy to tell you how we can optimize the performance of your hydraulic system.

It filters the air drawn in from outside and at the same time protects the system against the ingress of dirt. ARGO-HYTOS offers ventilating filters that not only keep out dirt and humidity. They also simplify maintenance and extend the service life of the system. Find out here how ventilating filters work and what specific advantages the components offer for hydraulic systems.

Technical function of aeration filters

Ventilating filters enable efficient air exchange in hydraulic systems, which compensates for pressure fluctuations in the hydraulic tank. At the same time, they effectively filter the intake air and keep out dirt particles. A drying granulate also absorbs humidity from the ambient air drawn in.

A check valve ensures that the exchange of air with the environment is reduced. This means that less dirt can enter the tank from the environment. The precise adjustment of the response pressure of the check valve to the system requirements ensures efficient protection and optimum operating conditions.

How are ventilating filters used?

The main task of ventilating filters is to protect hydraulic systems from contamination by the outside air. At the same time, the necessary air exchange for pressure compensation in the hydraulic tank is ensured. Pressure compensation is important because the oil level in a hydraulic tank can vary. The reasons for this are:

• Temperature fluctuations
• Operating conditions
• Movement of working cylinders used

Without adequate air exchange, the fluctuations could lead to unacceptable pressure conditions in the tank. This could impair system performance or even cause damage.

Technically speaking, ventilating filters fulfill two main functions. They let air into the tank to prevent negative pressure. And they let air out to prevent overpressure.

During this process, they effectively filter particles and impurities from the air. These could otherwise enter the system and contaminate the hydraulic fluid. Modern ventilating filters are also able to absorb humidity from the air. This prevents the formation of condensation in the tank and thus minimizes quality degradation of the hydraulic fluid used.

Various operating parameters must be taken into account when selecting ventilating filters. These include, for example, the maximum air flow rate. This is required to effectively regulate the pressure in the tank without compromising filter efficiency. We would be happy to help you select the right filter for your application. Please feel free to contact our experts at any time.

What types of contamination can occur in hydraulic systems?

Various types of contamination can occur in hydraulic systems, which can pose a considerable risk to the functionality and service life of the system. The most common types of contamination include solid particles such as dust, sand and metal abrasion. Liquids, especially water, can also enter the system and cause corrosion and degradation of the hydraulic fluid. Chemical contamination caused by oxidation or decomposition of the hydraulic fluid also impairs system performance.

Contamination can lead to a variety of problems, including increased wear on pumps, valves and other hydraulic components. They can reduce the efficiency of the system, lead to leaks and, in the worst case, cause system failures.

The precision of hydraulic controls can be impaired by contamination, which jeopardizes the safety and reliability of the entire system. Therefore, effective filtration and regular maintenance is crucial to ensure the cleanliness of the hydraulic fluid. It also minimizes the risks posed by contamination.

Comprehensive portfolio of ventilating filters from ARGO-HYTOS

ARGO-HYTOS offers a broad portfolio of ventilating filters that can be used to protect hydraulic systems from contamination efficiently, economically and sustainably.

In addition to standard ventilating filters, our product range also includes variants with patented Vandalism Proof features that offer reliable protection against unauthorized access.

The safety system ensures that the ventilating filters can only be removed with the special tool supplied. This makes it considerably more difficult to remove the filter or fill in dirt via the tank interface.

Filling and ventilating filters from ARGO-HYTOS are available in capacities of 200 l/min for filling filters and up to 850 l/min for ventilating filters. If required, they can also be equipped with additional vandalism protection.

Ventilating dryers and ventilating filters with desiccant not only filter the intake air, but also absorb humidity using an efficient drying granulate. These filters offer protection against the ingress of solid particles as well as humidity, snow, spray or rainwater.

They are designed for nominal flow rates of up to 400 l/min and water absorption of up to 280 g. These filters are ideal for venting and bleeding oil tanks in hydraulic and lubrication systems, gearbox housings, transformers and fuel tanks.

Special features and advantages of ARGO-HYTOS ventilating filters

ARGO-HYTOS ventilating filters offer solutions that go far beyond the basic function of air exchange. They are specifically designed to maximize the efficiency and reliability of hydraulic systems. This is because they offer a range of unique benefits and special features.

A key element is the double check valve, which minimizes air exchange and thus significantly reduces the ingress of dirt and dust. This leads to a longer service life of the system.

Another important feature is the swash protection. It prevents oil from the tank from entering the ventilating filter or escaping into the environment. This ensures the cleanliness and safety of the operating area. This is a real plus for occupational safety and the environment.

The integration of dipsticks directly on the ventilating filter allows the oil level to be checked easily and accurately. The clogging indicator shows the optimum time for filter maintenance. Our patented Vandalism Proof ventilating filters, which can only be removed with a special tool, offer additional protection against theft and contamination.

Another advantage is the option of integrating ventilating filters into the head sections of tank-mounted return filters. This integration saves costs by eliminating the need for an additional interface for the ventilating filter. Potential leakage points are also avoided. Maintenance work is significantly simplified by using the head section of the return filter on the housing to accommodate the ventilating filter.

Special features & advantages in a compact overview

• The double check valve reduces air exchange and minimizes the ingress of dirt.
• A swash protection prevents oil from escaping from the tank.
• Integrated dipsticks make it easy to check the oil level.
• The integrated clogging indicator signals the optimum time for filter maintenance.
• The patented Vandalism Proof design ensures reliable protection against unauthorized removal or contamination.
• Integration in tank-mounted return filters saves costs and simplifies maintenance.

Conclusion: The importance of ventilating filters in hydraulic systems

Ventilating filters are an indispensable component for maintaining the efficiency, safety and longevity of hydraulic systems. The filters protect the system from the many dangers that can arise from contamination. They do this by filtering the intake air and effectively trapping humidity and particles. The components reliably prevent pressure imbalances and ensure the cleanliness of the hydraulic fluid in the long term.

ARGO-HYTOS offers your company exactly the right products for your specific needs with an extensive portfolio of filter technologies. We would be happy to advise you in a personal meeting on the many advantages that our ventilating filters offer you in daily use. Get in touch with us right away!

Our team at ARGO-HYTOS Poland offers complex customer service from concept to the final product as well as after-sales care. One of the company's most distinguishing features is the ability to provide a whole range of services tailored to the specific customer's requirements.

The cooperation between customer and supplier is extended beyond the delivery of the final product, such as: power pack, filter unit or set of sensors. A qualified team assists the customer in the process of launching a given application and provides support during periodic maintenance and repairs. Service technicians use high-end diagnostic equipment to analyze a wide range of parameters of hydraulic equipment. In addition, they are aided by a range of filter units and oil sensors.

"Our biggest advantage is that we have a mobile service, enabling us to respond quickly in case of an emergency. As a result, we can support our customers where they need us most." – Piotr Baran, Service Engineer.

Main tasks of service in ARGO-HYTOS Poland

Diagnostic services:

• Assistance in the selection of spare parts
• Diagnostics of hydraulic systems
• Tests of prototypes (new hydraulic blocks)

Installation and maintenance:

• Assembly, commissioning and maintenance of power hydraulics systems
• Maintenance and repairs of filtration units (FMA)

Support services:

• Equipment rental
• Oil service
• Support of the quality department (complaint analysis)
• Training and consulting on proper service and operation of the applications

Innovations in Service: Introducing the Universal Mobile Power Unit

Building upon our dedication to innovation and customer-centric solutions, ARGO-HYTOS Poland proudly introduces the Universal Mobile Power Unit . This groundbreaking device exemplifies our commitment to pushing the boundaries of service excellence, combining our extensive service experience with advanced engineering expertise.

“The premise of the project has been universality at the highest possible level, great mobility, simplicity of operation and control.” – Engineer Wojciech Zarzycki.

The device is the size of a standard UMPC 045 filter unit and weighs 142 kg. The unit is based on a double gear pump with a 4-section block with return and pressure filtration.

Features of the device:

• quick commissioning in any location thanks to the use of a 1.5 kW motor with a 230C/50Hz power supply and a standard plug
• possibility of obtaining any pressure at the block outputs in the range of 10- 220bar; an additional output with miniBOOSTER - a hydraulic pressure intensifier allows you to obtain pressure up to 800ba
• control of pressure by an electro-hydraulic system
• possibility of controlling three different actuators
• the option to connect a hose crimper to an external mobile hydraulic and select the appropriate setting for the chosen hose size
• possibility of connecting to an external accumulators charging unit and entry charging parameters for automatic operation
• filtration outside (without using the oil inside the tank), transferring oil from the tank outside to another tank and the other way around (refilling the tank)

Control of the required operating status is possible thanks to the use of a 7' PLC controller with touch screen. The system has many additional sensors and a system of alarms improving user safety.

Ready to experience unparalleled service excellence? Contact us today to discover how ARGO-HYTOS Poland can elevate your operations and empower your success.

With 1,700 square meters, Zator offers sufficient space for production and enables a flexible and fast response to customer needs as well as today’s market demands. Hydraulic blocks and systems are shipped as prototypes or in smaller quantities to the ARGO-HYTOS entities in Northern and Eastern Europe. The Polish entity established a network of twelve distributors due to its market presence over the past years. This network covers the most important parts of Poland and enables about 30% of sales. The rest of the business is done directly with OEMs or end customers.

Products for future markets
While the German site concentrates on filtration, Poland has developed into a center for the development and production of sensors for Condition Monitoring in hydraulics. The expert fields of Fluid Management and Condition Monitoring are united under one roof. The attractive product portfolio serves as one of ARGO-HYTOS’ most important future market offerings. The impressive growth rates of 30% in each of the years 2020 and 2021 prove this potential.

Despite difficulties caused by the crisis such as disruptions to the supply chain, Zator continues to be on course for success in a market characterized by a high pace of innovation. More and more customers are demanding plug-and-play sensor technology while the trend moves toward standardized systems such as iLink, remote software and cloud solutions. Hydraulic service is also developing as a business sector where Zator is excellently equipped.

Attractive and well connected
The central and convenient location proves to be an important advantage: Zator is close to important highways and the Krakow Airport. The area is known to tourists for its nature and history while also being an attractive place to live. Around 70 people are currently employed at the entity, about a third of whom are engineers.

The proximity to the university cities of Krakow and Katowice has a positive effect on the search for specialists. ARGO-HYTOS provides fluid management equipment free of charge to the teaching institutions, thus actively promoting employer branding in the region. The Zator entity is a very attractive employer for students who have completed their training. A full-time position is on the horizon – with a renowned global player.

Mateusz Krupnik, Designer and Software Engineer at ARGO-HYTOS in Zator, talks about his job and future opportunities:

What are your responsibilities at ARGO-HYTOS?
I work as a Designer and Software Engineer. Currently, I am focusing on a project in the Condition Monitoring field where I am mainly responsible for engineering and product support. For example, we use intelligent sensor technology to monitor the condition of a machine to increase efficiency and minimize costs through optimized machine utilization.

How did you become part of the ARGO-HYTOS team?
During my studies at AGH University of Science and Technology in Krakow, I completed a summer internship at ARGO-HYTOS in Zator. Since I enjoyed the work a lot and could also develop professionally, I applied for an apprenticeship in the technical department next to my studies. They not only gave me this opportunity but also offered me a permanent position later on.

What did your training look like?
I learned about all departments during my training: from assembly and technical support to the design of simple hydraulic power units and blocks or complex hydraulic power units. This allowed me to gain valuable experiences in hydraulics, mechanics, automation and programming, which I still apply in my current role.

What makes your work in an international company special?
The job is very diverse, exciting and creative as different experiences and backgrounds come together in an international team. Naturally this leads to different and innovative approaches. Additionally, there is the unique opportunity to brush up and improve one’s language skills. Overall, ARGO-HYTOS really allows me to develop my professional perspectives in a decisive manner.

To date, Quick-Connect has proven itself with over 1,000,000 uses in the field in a wide range of applications. The system is not only quick to install, but also particularly secure. Once fitted, the snap-in safety clip indicates correct installation. The connection remains radially rotatable, which effortlessly brings the cable into a tension-free position.

The Quick-Connect system impresses with numerous technical advantages such as

• a wide temperature range from -30 °C to +100 °C,
• an operating pressure of up to 10 bar and
• large flow cross-sections for minimal pressure loss.

What makes the Quick-Connect hose connections so efficient and cost-effective?

The Quick-Connect hose connections from ARGO-HYTOS are a cost-effective alternative to conventional metal hose connection fittings. The reliable and tried-and-tested system has proven itself in daily use in the field with over 1,000,000 connections. The use of plastic technologies makes the system a cost-effective solution without compromising on quality or performance.

The Quick-Connect hose connections are characterized by modularity and diversity. More than 30 options in various sizes and angles allow flexible adaptation to a wide range of requirements in the field of hydraulic technology.

When designing the Quick-Connect system, the focus was on optimized user-friendliness. The particularly easy handling of the connections enables quick and error-free installation. This is an enormous advantage, especially when used in confined spaces.

Tool-free installation not only reduces installation time, but also the risk of installation errors. The resulting significant increase in efficiency helps to reduce costs throughout the entire assembly process.

The Quick-Connect hose connections also offer a high level of safety during use. An integrated safety clip indicates correct assembly and prevents unintentional loosening of the hose line. The radial rotatability of the cable contributes to the durability of the connection, as tension in the hose is reliably reduced. This increases safety in dynamic applications.

What are the technical specifications of the Quick-Connect hose connections?

The Quick-Connect hose connections from ARGO-HYTOS are made from modern high-performance materials such as polyamide with glass fiber or carbon fiber reinforcement. The high-quality material selection represents the optimum combination of strength and flexibility.

The temperature range of the system extends from -30 °C to +100 °C with a short-term tolerance of up to +120 °C. This allows the Quick-Connect hose connections to be used in a wide variety of environments and under extreme conditions.

Important technical data at a glance

• Material: Polyamide, reinforced with glass or carbon fibers
• Temperature range: -30 °C to +100 °C, short-term up to +120 °C
• Operating pressure: up to 10 bar
• Sealing material: HNBR (others on request)

The use of HNBR (hydrogenated nitrile butadiene rubber) as a sealing material ensures high resistance to chemical substances, oils and temperatures. This significantly increases the service life and reliability of the connection system.

Another technical advantage of the Quick-Connect system is its ability to adapt to metal nozzles. This flexibility allows the system to be used in a wide range of existing fluid technology applications. Extensive modifications to already installed components are not necessary. The combination of technical features makes the Quick-Connect system a reliable, versatile solution for modern hydraulic applications.

Easy, tool-free installation

The Quick-Connect hose connections make it easier to install hose lines thanks to their particularly simple assembly. The line is simply pushed onto the connector and secured with a safety clip. The tool-free assembly eliminates the need to check tightening torques, which both saves time and minimizes assembly errors.

Once installation is complete, the ability to rotate the cable through 360° allows it to be used without tension.

The flexible rotatability of the cables also offers significant advantages in terms of flexibility and durability. It allows the cables to adapt without creating tension or kinks. This simplifies system maintenance and extends the service life of the cables.

In addition to the flexibility in daily use, the tool-free assembly of the Quick-Connect hose connections considerably simplifies the installation process. No special knowledge or tools are required. This is ideal for applications where quick and uncomplicated installation is required.

Advantages of the Quick-Connect hose connections: Shorter assembly time, increased cost efficiency

The Quick-Connect hose connections from ARGO-HYTOS offer significant advantages, particularly in terms of installation time and cost efficiency. The assembly sequence is up to 80 percent faster than with conventional fittings. In direct comparison, this leads to considerable time savings. The added efficiency means direct cost savings, as less labor is required for installation.

Further advantages of the Quick-Connect system

• Significant cost savings compared to classic metal hydraulic fittings
• Error-free installation thanks to a simple and intuitive system
• Assembly without tools, which further simplifies the installation process
• Flexible use in confined spaces thanks to a 360° rotatable line
• Large flow cross-sections for low pressure losses

The outstanding technical properties make the Quick-Connect hose connections particularly suitable for time-critical applications or installation in confined spaces. The simple, tool-free assembly saves time and reduces the risk of assembly errors. You can count on greater reliability and a longer service life for your hydraulic systems!

The maximum flexibility of the system is also particularly evident in confined spaces. The ability to rotate the line through 360° allows optimum positioning and reduces tension in the line.

In addition, the large flow cross-sections of the Quick-Connect system ensure efficient hydraulic systems with low pressure losses. This increases the overall performance of your systems and reduces operating costs, as less energy is required for operation.

Summary of innovations in the Quick-Connect system

The Quick-Connect hose connections from ARGO-HYTOS represent a convincing innovation in fluid technology. With numerous successful applications in the field, the system has proven to be a reliable, efficient and cost-effective solution.

The main features of the Quick-Connect hose connections include tool-free, up to 80 percent faster installation compared to conventional fittings. For you, this means significant time and cost savings - even during the initial installation.

The use of reinforced polyamide as the material and HNBR as the sealing material ensure high durability and reliability of the connections. This also applies under extreme conditions.

Flexibility in use is further enhanced by the fact that the cables can be rotated through 360°. This allows the cables to be laid without tension at all times. At the same time, the service life of the cables is increased. This property is an unbeatable advantage, especially in dynamic environments. In addition, the large flow cross-sections of the system allow efficient fluid routing with low pressure losses, which increases the overall performance of the hydraulic system.

The Quick-Connect hose connections offer a comprehensive range of technical advantages. They make our system a proven solution for a wide range of hydraulic applications. With Quick-Connect hose connectors, we combine ease of use with flexibility, efficiency and economy in one innovative product.

Did you know? ARGO-HYTOS is represented locally in all markets worldwide by its own companies or partner companies. This means that any OEM or end customer can purchase Quick-Connect systems easily and quickly anywhere in the world.

Would you like to find out more about our Quick-Connect hose connections? Or would you like to discuss the possibilities offered by innovative ideas and proven technology with our experts? Contact us for more information and advice!

Intelligent detail solution

Operators have the option to choose a clogging indicator to specify when the filter element needs to be changed. This optical, manually resettable vacuum indicator guarantees optimum utilization of the filter life.

The flexible installation concept of the service-friendly housings is another noticeable added value for the operator. Depending on the tank interface, the flow-optimized filter housings can be screwed in by means of a threaded connection or flange-mounted directly. A bayonet thread in the cover ensures fast, uncomplicated and convenient filter element replacement. The necessary security is also provided: the filters can be secured with a padlock to prevent unauthorized access.

In addition, numerous design measures prevent water from entering the housing or tank of the system as well as hydraulic fluid from leaking out of the tank.

Your advantages:

• High filtration performance
• Cost-effective filter maintenance
• Resistance against unauthorized opening

Performance Data

• Nominal flow: up to 2,500 l/min
• Filter element: changeable
• Filter fineness: Fine filter - 2 µm(c) or wet air filter - 60 µm (screen)
• Connections: Thread G 1, G 1¼ or 6 hole flange (ø 73 mm)

Following the successful conclusion of the "100 Places for Industry 4.0 in Baden-Württemberg" competition, the Industry 4.0 Alliance is responding to the rapid development in the field of digitalization with this new competition.

At an event in Stuttgart on 22 November 2013, ARGO-HYTOS received an award for its digital dashboards. Martin Kroboth, Managing Director of ARGO-HYTOS GMBH, and Head of Operations Ralph Bauer accepted the award on behalf of production at ARGO-HYTOS Germany. Marcel Müller and Bernhard Schneck were primarily responsible for the implementation within the company.

At the production site in Kraichtal-Menzingen, the dashboards visualize application-specific key figures, process and performance parameters in real time in direct and indirect areas of the company.

A modular system is used for this purpose, on the basis of which the development of the dashboards can be realized completely independently and with minimal effort and reduced know-how requirements.

The agile process offers employees at all levels of the company the opportunity to identify and realize potential for improvement. Automated processing makes it possible to combine different data systems (e.g. ERP, MDE, databases, ...) and thus utilize synergy effects. This means that any deviations from targets, trends, opportunities and risks can be recognized at an early stage and the necessary measures can be derived. The system is used at ARGO-HYTOS to visualize process and performance parameters across all operational areas (e.g. production, logistics, sales, project management, human resources).

Coil operated explosion proof valves are available on the market in different versions. Each of them consists of an electrical part, the solenoid control coil and a mechanical part, which includes the control system and the hydraulic section.

The basic protection for the solenoid coil is an encapsulation with insulating material (protection class m, EN 60079-18). The terminal strip for the electrical connection of the coil as well as the cable gland are certified according to e (EN 60079-7). Our EX valves are certified for hazardous dust areas prone to explosion according to protection class t (EN 60079-31).

The coils themselves are certified according to the European Directive 2014/34/EU and the internationally applicable IECEx as well as other national standards.

The power rating is related to the maximum surface temperature of the coil, which in turn is divided into classes: valves with a 10 W coil can be used in temperature classes T4 (135 °C), T5 (100 °C) or T6 (85 °C), provided that the power supply, ambient and fluid temperature specifications are not exceeded. The 18 watt variant can only be used in the T4 class due to its higher power dissipation.

The valves can be equipped with a manual emergency control, in case of coil or power failure. The manual override can be controlled up to 25 bar pressure in the control system. A spool operated directional control valve with built-in manual control allows operation at up to 100 bar pressure at the T-port. This does not affect the normal coil control.

Your advantages

• Explosion-proof operation
• Certified according to international standards
• Flexible power supply
• Corrosion resistant
• Insensitive to mechanical stress
• Can be utilized under difficult conditions in mines

The overall carbon footprint from ARGO-HYTOS in 2022 amounted to 12,440,265.83 kg CO₂, which corresponds to the carbon footprint of 1432 European citizens (one person in Europe emits an average of 8.7t CO2 per year). To put this number into context: ARGO-HYTOS is composed of seven production entities, nine sales units and 1600 employees spread across these sixteen different entities.
To continue the path of carbon neutrality and striving towards the 55% reduction of our emissions, we devote 2% of our invest volume to proactive measures across our entities that reduce CO2 emissions.
A great investment is allocated to our plant in India where we are investing in solar technology on site. Meanwhile, our Czech entity is undertaking pivotal facility management measures to reach higher recuperation energy levels. For example, adjustments are made to create a closed cooling circuit to preserve energy, thermal insulation is being expanded and a complete switch to LED lighting is in the works.
Other measures taken across all entities is a switch to green energy wherever feasible and a move towards electric cars with the adequate infrastructure.

Thinking ECO at ARGO-HYTOS

ARGO-HYTOS embraces the megatrend sustainability in our innovation approach.
We reduce the carbon footprint of our products during production and usage. We also strive for recycling services as a product while also transforming our products to achieve higher recyclability possibilities. To deliver these results, eco-thinking needs to be ingrained in the minds of all employees across the globe to educate and encourage them to choose more sustainable alternatives.
Our teams are at the forefront of putting all sustainability measures into practice. For example, the Quality Management team has updated the approval process for the ordering of new production equipment that reflect the highest sustainability standards.

Sustainable Alternatives for our Customers
As part of our sustainability strategy, ARGO-HYTOS places a great focus on product alternatives for our customers to achieve a more sustainable operation. The alternatives provide all benefits of high-efficiency and long service life with a less harmful environmental impact.

In the field of filtration, we have introduced product alternatives in the construction and agriculture niche with the aim of expanding these alternatives in other industries and product ranges such as Fluid & Motion-Control. The transformation of the product alternatives has led up to a 50% longer service life and up to a 40% reduced pressure drop for our customer applications. The reusing of filter components such as the reuse of the housing of our spin-on alternatives is another example of the measures taken to bring customers a lower level of energy consumption.

Cleanliness is essential

“Hydraulics come often into action in dirty environments but cleanliness is essential inside a machine. Fluid contamination is the most common cause of premature wear and machine downtime,” explains Anke Kraus, Head of Group Quality Management at ARGO-HYTOS. “This makes it all the more important to raise awareness when it comes to cleanliness in the workplace.“

Avoiding all kinds of contamination is of highest importance.
ARGO-HYTOS has three golden rules for this:

• Avoid dirt: This applies to the selection of production equipment and methods as well as to the briefing for and selection of suppliers. Frequent causes of contamination are metal chips brought in with deliveries or abrasion from unsuitable packaging material, which must be avoided.
• Remove contamination immediately: The longer contamination persists, the more the foreign matter spreads and the more difficult it is to recapture. Those who react quickly avoid high and time-consuming cleaning costs.
• Protect components from contamination: There are a number of aspects to consider here, especially during storage and transport.

“Cleanliness for us is much more than just aesthetics,” affirms Anke Kraus. “Avoiding contamination of any kind is a very important pillar of our quality concept. Therefore, every new employee receives special training on this very complex topic, also as part of the cLEAN campaign.“

Order increases productivity

“Only the tools and materials that are really needed at the moment should be at the workspace,” explains Dr. Dirk Linden, Head of Group Technology & Production at ARGO-HYTOS. “The area should always be tidy, standardized and well-structured - you have a higher output if you search for less.“

The 5S principle applies to the workspace:

• Sort & select: Separate the important from the unimportant - only what is currently needed should be in the workspace.
• Set in order: Arrange important tools and production equipment in a clear manner and within reach for easy accessibility - and to notice immediately if something is missing.
• Shine: Establish and maintain cleanliness - clean systematically and remove contamination immediately.
• Standardize: Tidy up according to standardized principles and check conditions according to the set-out plan. This way even a substitute can find their way around immediately.
• Sustain: Maintain the achieved conditions and improve them continuously - only the continuous implementation of the guidelines guarantees maximum quality.

Get rid of any baggage!

The LEAN principle is at least as important as adhering to the rules of cleanliness. “Production and intralogistics must get rid of everything that wastes time, manpower and production resources,” asserts José Kemerer, Head of Group Supply Chain at ARGO-HYTOS. “We produce what the customer wants, needs and pays for – nothing less than that but also not more.”

The following disruptive factors must be avoided:

• Overproduction: Any part that is produced but not processed further immediately wastes space, money and other resources.
• Waiting times: Delays in internal logistics and service operations cause involuntary pauses and lower productivity.
• Excessive stock and buffer inventories: Parts that are produced and kept in stock “just in case” are an indication of inadequate planning and must be avoided.
• Defects: The later a defect is detected, the higher the processing effort in production. Additionally, it can also lead to a loss of image if a defect is only noticed by the customer and not during production.
• Superfluous movement: Every movement on the shopfloor that does not directly serve production is a waste of energy.
• Unnecessary transport: Every route taken means additional costs. This makes careful planning in intralogistics all the more important.
• Additional work and rework: Every feature or element and every production step that is not explicitly requested by the customer reduces efficiency and increases unit costs - also for the customer. Rework is also relevant, meaning the correction of errors made in previous process steps.

Challenging and fostering employees

“The most important success factor in our company are our employees,” conclude the three ARGO-HYTOS experts. “Putting their qualifications and talents to good use and promoting them in a targeted manner is one of the main objectives of our HR policy. Rules and specifications are essential, but the personal responsibility of each individual is even more important - in their personal workspace and beyond.“

Off-line filters are independent systems that are used outside the main circuit of the hydraulic system. This allows particles, water and other impurities to be removed from the oil without interrupting the operation of the machine for cleaning work. Find out in this article what off-line filters are suitable for and how they contribute to reliable fluid cleaning in hydraulic circuits.

What are off-line filters and how do they work?

An off-line filter is an independent filtration system that works in parallel with the main circuit of a hydraulic system. It only ever treats part of the oil. This is in contrast to the main flow filter, which is integrated directly into the main circuit and cleans the entire fluid flowing through it.

The main advantage of off-line filtration is its efficiency in removing fine particles and water from the oil, combined with a huge dirt holding capacity. Due to their special design, off-line filters can filter out contaminants that may not be captured by mainstream filters. This prevents significant damage to the hydraulic components used, which can be caused by even the smallest particles.

In addition, the removal of water from the system prevents oxidation and corrosion. This improves performance and significantly extends the service life of the hydraulic components.

Off-line filters are installed either during the initial assembly of the machine by the manufacturer or as a retrofit option by the user. A major advantage of retrofitting is that the installation does not require any changes to the existing hydraulic circuit.

The efficiency, high dirt holding capacity and excellent water absorption of off-line filtration are often enhanced by extra features such as oil condition monitoring. ARGO-HYTOS off-line filters can be used over long periods of time without the need for costly maintenance or regular replacement. Off-line filters are therefore a cost-effective solution that helps to extend the service life of the hydraulic oil and thus reduce operating costs.

How do stationary off-line filters work and what are their areas of application?

Stationary bypass filters, also known as off-line filters, are independent filtration systems used for the continuous cleaning of hydraulic fluids. Their main advantage lies in their ability to improve the quality of the hydraulic oil without affecting the existing hydraulic circuit or machine operation.

The filters can be installed either by the machine manufacturer during initial installation or by the end user as a retrofit.

In combination with other filter units, such as pressure filters, off-line filters ensure permanently flawless oil quality.

For example, the FNS1 040 off-line filter from ARGO-HYTOS is a high-performance stationary off-line filter with a water-absorbing element. It offers excellent water absorption capacity - regardless of the system temperature. Additionally, it enables the removal of solid particles and has an enormous dirt holding capacity, which has been confirmed by tests in accordance with ISO standards.

Specialized off-line filter units such as the FNA1HV 008 are used for filtration in hydraulic and lubrication systems with high viscosities. It offers a compact, robust and leak-free design and a large dirt-holding capacity. The filter elements can be changed without tools and during operation.

Off-line filters from ARGO-HYTOS are available for original equipment, as part of a retrofit or for retrofitting machines. The filter solutions guarantee continuous filtration of the fluids - even when the main cylinders of the machines are not in motion.

What functions and advantages do mobile oil service units from ARGO-HYTOS offer?

Mobile oil service units from ARGO-HYTOS are multifunctional devices specially designed for the location-independent maintenance and servicing of hydraulic systems. The units can be used for the following tasks:

• Transferring oil
• Pumping out used oil
• Filling machines with filtered oil
• Off-line filtration

The UMPC2 mobile oil service unit is one of the latest additions to the ARGO-HYTOS portfolio. Apart from the great performance guaranteed by the well-known UMPC 045, the UMPC2 is additionally characterized by an ergonomic touch display, optimal handling and high filter performance.

Alternatively, the economical UMPCL2 045 oil service unit also offers high filter performance and ease of use.

The most important features of all units of the UMPC family are as follows:

• Easy replacement of the filter element
• Integrated sensors for monitoring the oil condition
• Storage of data and settings in individual profiles
• Optional flexible flow regulation in the range from 20 to 70 l/min
• Ergonomic design for easy handling and clean transportation

The core element of the complete family of the UMPC units is the ultra-fine filter element, which has a high separation efficiency up to 4 kg. It therefore guarantees an outstanding level of oil cleanliness. This offers maximum protection for the components in the overall hydraulic system.

Mobile oil service units are an economical and flexible alternative to stationary off-line filters. We would be happy to advise you on the advantages of both solutions in a personal consultation. Get in touch with our team of experts now!

How do mobile dewatering systems from ARGO-HYTOS affect oil quality?

Mobile dewatering systems from ARGO-HYTOS ensure the lasting quality of hydraulic and lubricating oils. Water contamination in oils can have serious consequences, which are reliably prevented by the mobile dewatering systems. The vacuum dewatering units from ARGO-HYTOS are specially developed to remove both free and dissolved water from hydraulic and lubricating oils. This ensures the long-term performance of the oils.

Water contamination can negatively affect the efficiency of the entire hydraulic or lubrication system by

• Accelerated oil oxidation, which has a negative impact on air separation ability, anti-foaming agents and lubrication performance
• Degeneration of additives, which accelerates corrosion and wear
• Shortening the service life of the oil, which causes more frequent oil changes and therefore higher costs

The vacuum dewatering units from ARGO-HYTOS reliably remove water from hydraulic and lubricating oils. This prevents the formation of oxidation products, extends the service life of the oil and increases the overall efficiency of the hydraulic system. These units also help to reduce maintenance costs and downtime. This is because they reduce the need for frequent oil changes and extend the service life of the components.

The mobile drainage systems from ARGO-HYTOS support high-performance fluid management. This reduces operating costs and ensures the reliability of hydraulic systems.

Permanently clean oil with filtration technologies from ARGO-HYTOS

With filtration technology from ARGO-HYTOS, you can ensure the long-term cleanliness of hydraulic fluids or lubricants in your company. Our off-line filters or mobile oil cleaning devices make a significant contribution to the performance and longevity of machines. Both solutions have their own advantages.

Stationary off-line filters offer efficient and reliable cleaning and are suitable for both new machines and retrofitting. The filter systems effectively remove particles, water and other contaminants without affecting the production operation of the machines. Expensive, unproductive downtimes are reduced, as the filter elements can also be changed during operation if necessary.

The high dirt holding capacity and excellent water absorption capacity make bypass filters reliable components for use in a wide range of industrial applications.

In use, mobile oil service units such as UMPC2 and UMPCL2 045 contribute to the flexible improvement of oil quality. Mobile oil service units enable efficient filtration of hydraulic fluids and simple filling, cleaning and pumping.

With our mobile dewatering systems, you can rely on high technical performance in the fight against water contamination in oils. The devices increase the service life of the oils used and prevent negative effects on the performance of your hydraulic or lubricant units.

ARGO-HYTOS filtration technologies provide companies with a high-quality, reliable solution for the sustainable optimization of hydraulic or lubricant systems. Reduce your operating costs and increase the performance of your production machines at the same time!

Would you like to find out more about our bypass filters or other products from our portfolio? Then get in touch with our experts right away for a no-obligation consultation.

“I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait until oil and coal run out before we tackle that.” The need for energy transition was already recognized by the U.S. inventor and electrical engineer Thomas Alva Edison, born in 1847. We have known for a long time that saving energy and sustainability would become decisive cost and success factors. Skyrocketing energy prices and the relentless presence of climate change have made it clear to us once again how important it is to utilize resources effectively, also in the hydraulics industry.

Energy efficiency and decentralization

The ARGO-HYTOS Group recognized these trends early on. We analyze continuously the main causes for energy loss in hydraulics:

• Losses during energy conversion in pumps, motors and cylinders
• Losses in pipes, hoses and control blocks (HIC)
• Losses in valves and through inefficient control architecture
• Requirements of auxiliary units, for example, control and feed circuits or filtration

In addition to the continuous energy consumption optimization of all systems, decentralization is an important strategy to increase efficiency. The power here is distributed electrically instead of hydraulically using valve technology and a complex piping system; decentralized motor-pump units close to the actuators generate and distribute the hydraulic energy. The units can be optimally designed for a specific drive task. Losses due to pumps running idle and energy losses in lines and additional valves are avoided as far as possible. In this process, the control intelligence is often shifted from the central unit to the periphery.

The local control of the decentralized unit takes over control processes as well as monitoring processes while the central control merely supplies the next position of the drive as a control command. This reduces the complexity of the systems and simplifies commissioning.

From a component supplier to a system solution provider

The decentralized approach also brings new opportunities for suppliers like ARGO-HYTOS: OEMs are increasingly demanding ready-configured electrohydraulic systems with local intelligence in contrast to the past where individual components and hydraulic subsystems were requested. These electrohydraulic systems can be easily integrated into the customer’s products with no need to reinvent the wheel.

This allows also smaller manufacturers to partake in the market and launch, for example, commercial vehicles for agriculture or road construction without immense development effort. A good example brings an articulated dump truck with hydro-pneumatic suspension. It was possible to significantly reduce development time and effort by working together with ARGO-HYTOS application experts and using ready-made modules from the modular hydro-pneumatic suspension system. The design of cylinder sizes, pre-charging of the diaphragm accumulators or pipe diameters was carried out by ARGO-HYTOS based on machine data such as weight, loading conditions and speed. The software was configured and uploaded to the controller based on the proposed layout, and the control blocks and other accessories were selected. An initial functional test was carried out at the load test rig at ARGO-HYTOS. Before the system was even installed in the machine, all basic settings and functionalities had been tested and checked. Consequently, implementation was quick and easy.

Synergy with electronics

The hydraulics industry is experiencing an exponential demand for electronics and sensor technology. For example, sprayers require spray nozzles that adapt according to application where the amount of crop protection liquid or fertilizer needs to be adjusted to avoid overuse and to protect the environment.

Hydraulic systems are increasingly monitoring themselves with modern sensory and intelligent evaluation software and electronics, which saves a lot of effort and resources. In the past, frequent fluid laboratory analyses and regular filter and fluid change intervals were a precautionary necessity. Nowadays, particle counters continuously provide very precise data on the degree of contamination of a hydraulic fluid. This means that change intervals can be tailored to requirements and maintenance can be triggered automatically via cloud platforms when really necessary.

Decentralized logistics

Not just in the field of engineering are the trends pointing to decentralization but also in production and logistics. For a long time, it was not uncommon for the necessary components to be produced at one location and then shipped to the customer sites. Although this strategy allowed for higher volumes to be produced, it was also accompanied with risks due to disruptions in the supply chains while also causing increased transport costs. Reasonable and reliable transport costs are becoming more and more a challenge due to ever higher energy prices and political developments. Therefore, ARGO-HYTOS attaches great importance to a local-for-local approach where production takes place at the customer’s site whenever possible. Similarly, supplier parts are manufactured in the immediate vicinity of the production site and are thus readily available – with a strong focus on sustainability. This enables us to reduce inefficient logistics expenses and CO2 emissions sustainably. Shorter supply chains allow us to respond more quickly to changing requirements, which leads to higher flexibility.

Embarking on the future together

The future of the hydraulics industry is as complex as the technology itself. And the recent past has shown that nothing is more difficult than predicting the future. But one thing is for sure: it will be digital, integrative, energy-saving and, above all, sustainable. It is important for us to act responsibly in our daily work and reduce our CO2 footprint. The best example of this approach is our company-wide cLEAN campaign with which we are continuing to set the highest standards in terms of qualification and a streamlined production as well as administration.

But no matter where the journey takes us, the ARGO-HYTOS Group is well positioned – thanks to its pioneering technologies and innovations, user-oriented system solutions and smart applications. This successful development is based on a flexible, motivated and high-performance team. The takeover of the Voith Group underpins this path. The globally active, broadly positioned technology group stands by ARGO-HYTOS as a new, financially strong partner. The family-run group provides the basis for synergies, further growth and sustainable value creation – in a business environment that is becoming increasingly challenging, not least due to dynamic political developments and their economic impact.

The pressure drop at 10 l/min is 3 bar, at 30 l/min 10 - 20 bar, depending on coil type and flow direction.

The compact dimensions of the SD2E-A4/H3 make the valve particularly suitable for mobile machines where installation space is usually limited. The zinc-coated housing has withstood 520 hours in the salt spray test (according to ISO 9227).

Your advantages:

• High flow rate
• High operating pressure
• Less space required due to compact housing
• Corrosion resistant surface

In combination with switching and proportional valves, the coils enable precise control and optimization of hydraulic processes. In this article, learn what exactly makes solenoid coils an essential component of switching and proportional valves. We also reveal how we can support your company with high-precision solutions for hydraulics.

What exactly are solenoid coils?

Solenoid coils play a key role in controlling and regulating fluids in hydraulic systems. At the core of their operation is the conversion of electrical energy into mechanical forces. This is done by generating a magnetic field when electric current flows through the wire of the coil.

By means of the pole tube and armature, the magnetic field influences the movement of a valve spool, which is responsible for regulating the fluid flow.

By selectively switching the current in the solenoid coil on or off, the position of the valve spool can be precisely controlled. This enables the fluid flow or influences its direction. This provides sensitive control over the flow and direction of fluids in a system.

The function of solenoid coils in the compact overview

• Solenoid coils generate an electromagnetic field in the actuating system (coil, pole tube, armature).
• The electromagnetic field causes the valve spool to move.
• The direction of flow of the medium is changed by the valve spool.
• When the current is switched off, the valve returns to its initial position by means of a return spring.
• In proportional valve systems, the solenoid coil precisely controls the valve opening.
• Fluid flow can be varied in proportion to the current in the solenoid coil.
• Solenoid coils allow infinite adjustment of fluid flow.

What tasks do solenoid coils perform in hydraulic valves?

Solenoid coils are an integral part of modern hydraulic valve systems and perform crucial functions. The main task of the coils is maximum precise control and regulation of the fluid flow. In actuation systems for switching valves, the solenoid coil is used to generate an electromagnetic field.

The magnetic field acts on the armature and the plunger of the valve. This causes the valve spool to move against the action of the return spring. The result of this movement is a change in the direction of flow of the medium. As soon as the electric current flowing through the solenoid coil is switched off, the valve automatically returns to its initial position. This is ensured by the force of the return spring.

In actuation systems for proportional valves, the solenoid coil has an even more differentiated task. Here, controlling the current flowing through the coil allows precise control over the valve opening. This allows the fluid flow to be precisely matched to the specific requirements of the application.

For users, this means that the flow can not only be turned on or off. It can also be varied continuously and proportionally to the current in the solenoid coil. This offers engineers and technicians a high degree of flexibility in designing and optimizing hydraulic systems.

Typical applications of solenoid coils in hydraulics

Solenoid coils perform various tasks in hydraulics in the field of control and regulation of fluids. One of the main applications of solenoid coils is in solenoid-operated valves - often referred to as solenoid valves. These valves allow precise control of the flow of hydraulic fluids by activating or deactivating the solenoid coil.

As electric current flows through the solenoid coil, a magnetic field is created that attracts a metallic armature. This opens or closes the valve. This extremely fast process makes it possible to precisely control fluid flow while protecting the mechanical parts of the system.

A typical application of solenoid coils in hydraulic technology is their use in hydraulic pumps and motors. In both systems, the solenoid coil is used to precisely control the pressure and flow of fluids (mostly oil). The result is significantly higher efficiency and performance of the overall system.

For several years, solenoids have been an integral part of feedback systems in modern hydraulic systems. Sensors record data such as pressure, flow rate or temperature and transmit this information to a control unit.

This processes the data and sends corresponding control signals to the solenoid coils to make adjustments in real time. This allows tasks such as the synchronization of multiple cylinders or the control of motion sequences in machines to be performed precisely and efficiently.

Coils for electromagnetically operated valves from ARGO-HYTOS

Solenoid coils from ARGO-HYTOS are available with a wide range of possible coil voltages and a broad selection of connectors and connection options. The high-performance technical components are designed to be extremely robust against mechanical damage.

With their double-insulated copper wire on a plastic core and embedded in a steel housing, the coils can be used in demanding environments. A silicone seal further protects the coils from moisture and dust ingress.

Another smart feature of ARGO-HYTOS coils is that they can be rotated around the longitudinal axis. This allows the plug position to be adjusted conveniently and without major assembly effort. The solenoid coils are particularly suitable for valves that bring about a change in the direction of flow of the pressure fluid - for example, directional control valves or poppet valves.

Rely on our solenoid coils specially designed for electromagnetically actuated valves and benefit from a whole range of technical advantages:

• Variety of coil voltages: With a wide range of possible coil voltages, the right solution is available for every application.
• Flexible connectors and connection options: The coils have an extensive selection of connectors and connection options for flexible integration into various systems.
• Interchangeability: The solenoid coils are easy to replace with a few simple steps if required, which facilitates maintenance and repair work.
• Rotatability: solenoid coils can be rotated around their longitudinal axis, allowing the connector position to be adjusted according to the application.
• Robustness: Solenoid coils from ARGO-HYTOS are designed to be particularly resistant to mechanical damage. This ensures reliable function - long-term and sustainable and even under harsh operating conditions.
• Quenching diode: Some coil models are equipped with an integrated quenching diode or free-wheeling diode.

Valve technology from ARGO-HYTOS with solenoid coils

• Logic valves such as the proportional directional control valve SD2P-B4 from ARGO-HYTOS are equipped with 12 V or 24 V DC solenoid coils. The solenoid coils can be rotated 360 degrees, which makes positioning the plugs much easier.
• The SD3E-A2 directional control valve is equipped with solenoid coils that are interchangeable within the ROW/RPE3-04 product line for significantly easier repair.
• With the new One4All explosion-proof solenoids, customers get unparalleled hydraulic performance in all hazardous areas and temperature classes.

Solenoid coils from ARGO-HYTOS: Best performance in powerful hydraulic systems

Solenoid coils are at the heart of modern hydraulic systems. The inconspicuous electromechanical components efficiently convert electrical energy into mechanical movement. In this way, they enable the precise control of hydraulic valves. In combination with electromagnetically actuated valves, they regulate fluid flow and thus optimize operation in a wide variety of industrial applications.

Of particular note is their ability to provide extremely sensitive control in proportional valves, allowing stepless adjustment of fluid flow. We would be pleased to advise you in a personal conversation about the various applications and advantages of our solenoid coils and valve technology. Contact us now for further information and advice!

As Head of Legal, I am the first point of contact for legal issues within the ARGO-HYTOS Group. My day-to-day work is essentially divided into two areas. On the one hand, I grapple with topics that can be summarized as “corporate housekeeping,” and on the other hand, I provide support when inquiries from our business or management arise. Reviewing and editing contracts or providing clarifications to authorities is part of that. Additionally, when external lawyers come into play, I take on the coordination. For example, during the due diligence process in the run-up to the takeover of the majority shares by the Voith Group, I served as a liaison between the ARGO-HYTOS companies and external lawyers.

LET’S STAY WITH THE VOITH GROUP FOR A MOMENT: HAVE YOUR TASKS CHANGED AS A RESULT?

Compliance in the sense of consistently observing legal regulations and applying high moral standards in everyday business is a lived principle of the corporate culture at Voith. With our belonging to the Voith Group, these guidelines laid down in the Code of Conduct also apply to us. As part of my responsibilities as Head of Legal, I also ensure that these guidelines are further implemented and anchored in the ARGO-HYTOS Group. Being part of the Voith Group also offers the opportunity to benefit from proven tools in numerous other areas, such as the electronic signing of legal documents.

CLIMATE CHANGE, SUPPLY CHAIN BOTTLENECKS, SHORTAGE OF SKILLED WORKERS, PANDEMIC: DOES THE PERMANENT CRISIS HAVE AN IMPACT ON YOUR WORK?

The crises also concern me personally – and of course have an impact on our business and my work. We have to talk to the customers if, for example, we want to increase the contractually agreed prices due to a general increase in raw material prices. Honest communication, flexibility and trust are crucial here. It is important to propose pragmatic solutions despite legal uncertainties.

WHAT IS THE GREATEST CHALLENGE FOR YOU AS HEAD OF LEGAL?

My goal is to apply legal requirements and framework conditions in such a way that they are suitable for business. Clear formulations are important to me but also an appropriate balance between legal risks and business interests. If a business relationship is good, the contract stays in the filing cabinet. That is the ideal case. But the contract must provide clear and unambiguous answers if problems or questions arise.

WHAT IS THE BEST THING ABOUT YOUR WORK?

When I can offer a value-added to the business. My internal “clients” can rely on me to provide them with competent and professional advice and support while I take responsibility for assessing the legal risks.

WHAT IS YOUR FAVORITE PASTIME?

I like to be on foot in nature or cities. And I am a passionate (train) commuter. Podcasts have been my latest discovery. I’ve become a real fan and especially enjoy listening to them when I am on a walk.