Non-return valve hydraulically pilot operated RNXPM22

Non-return valves, pilot operated non return valves, shuttle valves, pipe failure valves, drain valves, 3-way shifting valves M22x1,5

Hydraulically pilot operated non-return valve in screw-in cartridge construction for cavity according to ISO 7789. In the free flow direction (2 → 1), the volume flow opens the spring loaded seat cone. In the opposite direction (1 → 2), the spring keeps the valve closed. If pressure is built up in connection x, the pilot control spool is shifted and the non-return valve of the closed off port is opened by this. The required pilot control pressure depends on the pilot ratio. ​

Switching valves Non-return valve hydraulically pilot operated RNXPM22

Non-return valve hydraulically pilot operated
Screw-in cartridge construction

  • Qmax = 80 l/min
  • pmax = 350 bar


Pilot operated non-return valves are used for closing off pressurised hydraulic cylinders leak free, for example in lifting or clamping devices. The spool valve that directs the volume flow to port x, should have both service ports connected to the tank in the rest position for reasons of operational safety.