Valves control the inlet or outlet of fluids or control and regulate the direction of flow.

In the case of directly controlled valves, the sealing element switches directly via the solenoid system.

Pressure-controlled valves are controlled through an external pilot valve. This means that high temperatures, high pressures, contaminated media, aggressive operating materials, etc. can be controlled with clean control medium.

The pressure limiting valve is also known as a pressure relief valve. It limits the maximum permissible pressure in a system. If the pressure in the system increases above a desired (set) value, this valve enables the discharge of hydraulic fluid into the tank. This type of valve generally prevents exceeding of the maximum pump pressure. The maximum pressure is set through the magnetic force (proportional to the flow). The connection P (pump) is initially blocked to T (tank). If the pressure increases above the set pressure, this can open the connection to T in the solenoid valve, so that the pressure is reduced to the set pressure.

In the case of the throttle valve, the solenoid positions the gate in the valve part against a spring, in a position which is in equilibrium with spring and magnetic force. A flow cross-section is set. The force of the solenoid is proportional to the flow.

In the case of the proportional pressure reducing valve, often also known as a pilot valve, a pressure proportional to the flow is set at the working connection. This valve has 3 connections for pump (P), tank (T) and working connection (A). The valve gate can be moved by means of magnetic force and opens the flow either from A to P or A to T, so that the pressure required in the system can be provided. This can be increased and reduced by the magnetic force.