Proportional spool valve pilot operated (slip-on coil)  WVPFA10_90

Proportional spool valves NG10

Pilot operated proportional spool valve with 4 connections in 5-chamber system. Precise spool fit, low leakage, long service life time. Very compact construction with corresponding low weight. The pilot valve is a proportional solenoid operated pressure reducing valve. The function of the pilot and main valve as well as the interaction of both valves can be found in the hydraulic diagram. Proportional to the solenoid current, the spool stroke, the spool opening and the valve volume flow increase. The proportional spool valve is not pressure compensated. For the control, Wandfluh proportional amplifiers are available (see register 1.13).

Proportional valves Proportional spool valve pilot operated (slip-on coil)  WVPFA10_90

Proportional spool valve
Flange construction

  • pilot operated
  • Qmax = 200 l/min
  • QN max = 90 l/min
  • pmax = 350 bar


Proportional spool valves are perfectly suitable for demanding tasks due to the high resolution, large volume flow and low hysteresis. Pilot operated valves are used where large volume flows have to be controlled. Due to the large flow range and the high stiffness of the actuation as a result of the pilot control, these valves are suitable for applications where fast acceleration and deceleration processes, high speeds and sensitive motion sequences are requi- red. The applications are in the industrial as well as in the mobile hydraulics for the smooth control of hydraulic actuations