Pneumatic valves
Pneumatic valves – general information
Directional control valves are designed for pneumatic over- and under-pressure systems. Usually, directional control valves act as simple controllers for actuators in a pneumatic system, so they are used to switch on and switch off e.g. a pneumatic cylinder, depending on the valve type, in one or two directions of cylinder movement. The distribution and switching of the flows are achieved through the interaction of the moving and fixed mechanical parts of the valve. Mounted directly on actuators, mounting plates or as independent components of the pneumatic system.
List of products:
Mini ball valves
Manual control distribution valves
Distribution valves with electric control
Directional control valves pneumatically controlled
Directional control valves electrically or pneumatically controlled
Directional control valves foot-operated
Throttle valve and throttle-check valves
Shut-off valves STOP
Accessories solenoids/dampers
If you need help choosing a product or haven’t found the right one?
FAQ – Distribution valves:
Directional control valves (distribution manifolds) control the direction of compressed air flow. In a pneumatic system, they usually work as controllers for actuators, and they switch on and switch off the operation of, for example, a pneumatic cylinder.
Directional control valves are identified by the number of flow paths (number of connections) and the number of positions (number of square boxes on a valve schematic diagram).
In the example below, the pneumatically controlled valve is a 3-way/2-position valve in a resting position (without control signal) normally closed NC: Normally Closed):
Monostable valve – continuous control – when a control signal disappears, a spring forces it to return to its resting position.
Bistable valve – impulse control – after a control signal disappears, it remains in its position (no spring).
For example, electrically controlled monostable valves have one solenoid on one side and bistable valves have two solenoids on both sides.
According to ISO 5599 standard, valve schematic diagrams are designated with numbers (previously letters).
Example of designation: 5/2 monostable valve, solenoid operated with pneumatic assistance (with external pilot supply), spring return:
1 – supply connection port,
2, 4 – working or outlet connection ports,
3, 5 – outlet to the atmosphere (venting connection ports),
12, 14 – control connection ports,
82, 84 – venting connection ports of supporting valves,
X – pilots external supply,
Pneumatic dampers are mounted in vent connections of valves and unused connections of cylinders to reduce noise and protect the system from external contamination.