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Fast response times, high reliability, and versatile applications—these are the hallmarks of modern solenoid valves. As inconspicuous but central components, they control liquids, gases, or chemicals in automated plants, laboratories, and technical systems. Fast, precise, and low-maintenance.
Whether you want to save energy, secure processes, or save time during installation: solenoid valves help to automate processes efficiently. Here you will find the right valve for your application and can order directly from our shop.
Automatic control allows you to optimize flow rates and save energy.
An electrically controlled switching process closes or opens circuits without manual intervention.
The compact design facilitates integration into existing systems and reduces installation times.
Standard directional control valves – for classic switching functions in pneumatics
Universal directional control valves – for flexible control tasks in compact installation spaces
Application-specific directional control valves – For special requirements regarding environment, medium, or cycle time
In industrial automation, solenoid valves control pneumatic cylinders and robot movements. In building technology, they reliably regulate heating and cooling systems. In medical technology, they ensure the precise dosing of gases and liquids – for example, in ventilation or dialysis equipment. They are also used in food production – mostly as hygienic stainless steel valves for precise dosing in filling processes. In the chemical industry, resistant materials such as PTFE or stainless steel protect against aggressive media. In water and wastewater technology, they control filter processes, pumps, or dosing systems. And in automotive engineering, solenoid valves perform important tasks – e.g., in air suspension systems, air conditioning systems, or injection systems. Whether 2-, 3-, or 4-way: there is a suitable solution for every application – efficient, robust, and precisely tailored to the requirements.
A directional control valve is a central control element in pneumatic and hydraulic systems. It regulates the direction of the air flow and thus determines which movement a cylinder or other actuator performs. Depending on the position of the valve, the air flow is released, stopped, or diverted to another line. Directional control valves are typically used to extend or retract a cylinder. Depending on the position of the valve, compressed air is directed to a specific side of the cylinder while the opposite side is vented. This creates the desired movement. As soon as the switch position changes, the process is reversed. The valve can be actuated in two ways: electrically, for example via a solenoid valve, or pneumatically, i.e. by compressed air. Which variant is more suitable depends on the application, the control technology, and the installation conditions.
A frequently used example is the 5/2 directional control valve. It has five ports and two switching positions. This allows it to direct compressed air to two different outputs, for example to both sides of a double-acting cylinder. This is precisely why this valve is the standard solution in many automated systems.
Directional control valves can be actuated electrically or pneumatically. Both variants have the same task: they control how and where the compressed air flows in the system. The difference lies in the type of control.
Electrically actuated directional control valves receive a switching signal from a control system, for example from a PLC or a sensor. The valves switch quickly and accurately. They can be easily integrated into automated processes. Typical designs are 3/2, 5/2, and 5/3 directional control valves, as are often used in standard directional control valves. Depending on the design, different numbers of switching positions and connection options can be implemented.
Pneumatically operated directional control valves work with control air. They are mainly used where electrical control is not possible or where a large number of switching operations per minute are required. In simple versions, a return spring ensures that the valve returns to its original position after switching. In double pneumatically operated valves, each switching position is controlled by air, as is often the case with universal and application-specific directional control valves.
Which design is more suitable depends on the application. Electrically operated valves are flexible and can be easily integrated into control systems. Pneumatically actuated valves also work without electricity and switch particularly quickly. They are robust and ideal for systems with high switching frequencies or special safety and environmental requirements.
The 5/2 directional control valve is a commonly used valve type in pneumatics. It has five connections and two switching positions. This allows it to alternately direct the air flow to two sides of a double-acting cylinder. This enables reliable control of the cylinder's movement.
This valve is primarily used in automated systems, for example in mechanical engineering or in production lines. In these applications, it is important that movement sequences are repeated accurately and without delay. The 5/2 directional control valve ensures that cylinders switch direction clearly and change their position quickly.
Another advantage is its versatile control. Depending on the application, the valve can be operated electrically or pneumatically. It can be easily integrated into existing systems and is also well suited for compact installation situations. The design is space-saving without compromising on performance or durability. In applications with many switching cycles, the 5/2 directional control valve impresses with its robust design and short response times.
The 3/2 directional control valve is used for simple control tasks. It has three connections and two switching positions. In practice, this means that when activated, compressed air flows to the consumer. When the signal is switched off, the valve vents the line.
This type of valve is particularly well suited for single-acting cylinders or as a shut-off and vent valve. It is also frequently used in safety-related applications where defined air reduction is required.
Thanks to its compact design, the 3/2 directional control valve can be flexibly integrated into systems. It operates reliably and responds quickly. That is why it can be found in many handling systems, grippers, or clamping devices. Where simple control functions are required, this valve offers a robust and economical solution.
A 5/3 directional control valve has five ports and three switching positions. It is primarily used when the control of a cylinder requires greater flexibility. In addition to forward and reverse stroke, it offers a center position that behaves differently depending on the design.
In this center position, the valve can completely block the air flow. However, it can also vent both sides of the cylinder or apply pressure on both sides. This allows the movement of the cylinder to be stopped, a position to be held, or the load to be relieved in a controlled manner.
These functions are particularly useful when movements need to be interrupted or held securely. Typical areas of application are machines with multiple cycle stages or applications with high safety requirements. The 5/3 directional control valve also offers a reliable solution for sensitive workpieces or changing loads.
Proportional valves control pressure or flow rate continuously rather than in fixed stages. The valve opening adapts precisely to the control signal. Depending on the signal strength, the air flow is released to a greater or lesser extent.
This type of control is used wherever movements or pressures need to be adjusted with particular precision. This applies, for example, to positioning systems, variable speed cylinders, or the metering of small quantities of air or gas. Proportional valves respond flexibly to changing requirements. They maintain a constant pressure even when the load changes. This saves energy, reduces wear, and ensures stable processes. This makes them an ideal solution for applications with high precision and dynamic requirements.
Choosing the right material is crucial for the durability, performance, and maintenance requirements of your solenoid valve. Whether brass, stainless steel, or plastic—each material has its own advantages and is suitable for different applications.
| Material | Properties | Typical applications |
| Brass | High mechanical strength, corrosion resistant to neutral liquids and gases | Water and air control, heating and air conditioning systems |
| Edelstahl | Hervorragende Korrosionsbeständigkeit, ideal für aggressive Medien und hygienische Umgebungen | Lebensmittel- und Pharmaindustrie, chemische Prozesse |
| Plastic | Lightweight, cost-effective, and corrosion-resistant; however, limited mechanical strength | Chemical control, applications with lower loads or aggressive media |
| Aluminum | Low weight and robust construction; corrosion protection through coatings (e.g., anodizing) | Compressed air applications, pneumatic systems |
In many cases, it is sufficient to check these points as part of annual maintenance. For particularly intensive applications or in harsh environments, shorter intervals are advisable. It is crucial that the valve always operates under the conditions for which it is designed.
The clever combination of housing, seal, and coil allows you to tailor the solenoid valve precisely to your operating conditions. Stainless steel housings with PTFE or FKM seals are ideal for highly aggressive fluids or high temperatures. Applications involving water or compressed air, on the other hand, often work well with brass and NBR. If you are looking for a lightweight and cost-effective solution, plastic is the way to go, especially if corrosion resistance is required.
The right choice of solenoid valve depends on the specific system parameters, including medium, pressure, temperature, and switching function. Here you can find out how to proceed step by step to determine the right valve for your application.
First, clarify which medium is to flow through the valve. Also determine the pressure and temperature range in which your system operates. The desired switching function also plays a role. Is only an on/off valve required, or a switching function between several lines?
Select the housing and seal material based on your application analysis. Stainless steel with PTFE seals is suitable for aggressive media or high temperatures. Brass and NBR are often sufficient for water and compressed air. Plastic can be a cost-effective alternative, especially in corrosive environments with low pressure.
Next, determine how much volume should flow through the valve per unit of time. The so-called Kv value helps here. Also pay attention to the operating and differential pressure of your system so that the valve is neither overloaded nor underloaded.
Check the voltage (e.g., 12 V DC, 24 V DC, or 230 V AC), the installation situation, and the desired response time. In time-critical applications such as automation or medical technology, a directly controlled valve with a fast switching time is recommended. If you want to save energy, choose coils with low power consumption. Alternatively, bistable valves are suitable, as they maintain their position even without a continuous current.
Consider whether specific certifications are necessary. In the food industry, FDA-compliant materials may be required, while ATEX-certified valves are mandatory in potentially explosive atmospheres. Drinking water applications, on the other hand, often require DVGW approval.
Finally, it is worth considering the service life of the valve. High-quality materials and regular maintenance ensure reliable operation. Plan maintenance intervals and use robust seals if the valve is subject to heavy use.
Are you unsure which solenoid valve is best suited to your application? Or would you like more details about materials and certifications? Our team of experts will be happy to assist you with any questions you may have about planning and selection. Whether by phone, email, or in person, we will help you find a customized and cost-effective solution.
A short conversation is often all it takes to clarify all the important points. Just get in touch.
A solenoid valve opens or closes a flow using an electromagnetic armature. It can precisely control liquids and gases and is found in simple irrigation systems as well as in complex industrial processes.
As soon as current flows through the coil, a magnetic field is created that attracts a small metal core. This core moves in such a way that the valve opens or closes the flow, depending on how it is designed. When the current is switched off, a spring pushes the core back into its original position. This returns the valve to its idle state and restores the flow to its preset condition.
A basic distinction is made between 2-way, 3-way, and 4-way valves. These types cover applications ranging from simple on/off control to the control of complex movements. In addition, there are various modes of operation, such as directly controlled, pilot-operated, or forced-guided valves.
They are used in almost all industries. Industry uses them in compressed air and hydraulic control systems. Building services engineering also benefits from them, for example in heating and air conditioning systems. In the chemical industry, they are used for aggressive media, and medical technology uses them for the precision dosing of gases and liquids.
The key factor is that it is suitable for the application. Consider the medium used (water, gas, or chemicals) as well as the pressure and temperature range. The desired switching function is also important. In addition, check the available voltage (12 V, 24 V, 230 V) and any certificates such as ATEX or FDA. If you would like further details or have any questions, we will be happy to advise you.
A directional control valve is a control element in a pneumatic system. It determines where the compressed air flows in the system. Depending on its position, the valve directs the air to the cylinder, vents it, or blocks the flow. Control can be electrical or pneumatic.
There are various designs. The 3/2 directional control valve is suitable for single-acting cylinders. The 5/2 directional control valve controls double-acting cylinders and is widely used in automation. A 5/3 directional control valve has an additional center position for more control functions. These variants are among the standard directional control valves used in many standard applications. Proportional valves continuously regulate pressure or flow, for example for positioning drives or dosing tasks.
Electrically operated valves are easy to control and can be integrated directly into control systems. They are often used in automated systems. Pneumatic variants do not require an electrical signal and are very resistant to switching. They are suitable for harsh environments or high cycle rates.
Important factors include the cylinder type, the desired control function, the type of control, as well as pressure, medium, and installation situation. The size of the valve and the required flow rate must also be suitable. Universal directional control valves are well suited for systems with changing requirements. For special conditions such as ATEX or media separation, the use of application-specific directional control valves is recommended.
Clean operation with filtered, dry compressed air is crucial. Regular visual inspections and checking the switching behavior, seals, and lines help to prevent failures. The correct operating pressure also contributes to longevity. In addition, stable mounting helps to prevent vibrations and reduce mechanical stress.
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