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Solenoid valves, force pilot operated

Force pilot operated solenoid valves essentially differ from the normal servo-assisted solenoid valves by means of a coupling, either of the piston or of the diaphragm, to the solenoid core. This coupling may either be direct or comprise a spring.

The function is a combination of directacting and servo-assisted. In the case of low pressure differentials, the directacting function of the system predominates, and the servo-assisted function of the system predominates at higher pressure differentials.


  • Opens without pressure differential, can also be used in circuits or at low pressures
  • Good closing-impact damping
  • Good price-performance ratio
  • Universal usability.

Servo-assisted 2/2-way solenoid valve, force pilot operated, normally closed, with diaphragm. Shown closed at left and open at right