Proportional 2-way flow control cartridge Ex-protection QNBPM33

Proportional throttle valves, proportional flow control valves M33x2

Direct operated, pressure compensated proportional flow control valve as screw-in cartridge for cavity according to ISO 7789. When the solenoid is deenergised, the control spool closes practically ­leakage-free. The change of the electric current is followed by a proportional volume flow change. From the input (1), the fluid flows over the control and throttling spool to the controlled output (2). The pressure tight encapsulated Ex-protection solenoid coil ­prevents an explosion on the inside penetrating to the outside as well as an ignitable surface temperature.

Proportional valves Proportional 2-way flow control cartridge Ex-protection QNBPM33

Proportional 2-way flow control cartridge​

  • direct operated, pressure compensated
  • Qmax = 70 l/min
  • QN max = 55 l/min
  • pmax = 350 bar


Proportional flow control valves are suitable for precise speed ­control, where the load current has to be maintained constant independent of the input and output pressure. These valves are suitable for applications in explosion-hazard areas, open cast and also in mines. The screw-in cartridge is perfectly suitable for installation in control blocks. 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.