Pressure relief cartridge direct operated BS_PM18

Pressure relief, backpressure, pressure sequence, accumulator unloading valves M18x1,5

Direct operated poppet type pressure relief valve in screw-in cartridge construction for cavity according to ISO 7789 The valve is closed in the neutral position. If the pressure in P (1) exceeds the adjusted value of the valve, the excessive pressure is drained to T (2). The back pressure at T (2) is added to the adjusted value. T (2) can be charged up to the maximum. Hardened precision parts ensure virtually leakage-free closing. Rapid switching with low hysteresis and excellent stability over the whole flow range.

Switching valves Pressure relief cartridge direct operated BS_PM18

Pressure relief cartridge​

  • direct operated
  • pmax = 400 bar
  • pN max = 315 bar
  • Qmax = 5 l/min


The valve is used for limiting the operating pressure in the hydraulic system or for protection against pressure peaks. Can be used in double pressure relief switches. For machining the cartridge cavity in steel and aluminum blocks, cavity tools are available (hire or purchase). Please refer to the data sheets in register 2.13. ​ ​