Ex-proof valves

21.08.2017

Proportional flow controller for explosion hazard areas

The proven directly operated flow controller from Wandfluh, in the nominal size of M33, is now also available in an explosion protection execution. The valve is available as a 2-way function with the designation QNBPM33. The solenoid coil is explosion protection certified for underground and opencast mining and can be used worldwide. The corresponding approvals exist for ATEX, IECEx, EAC, INMETRO, UL/CSA, NEPSI, MA and Australia.

    Via the solenoid current, the proportional valve can continuously adjust volume flows up to 55 l/min. The integrated load compensation regulates the volume flow in an excellent way, independently of the load pressure and can be used at pressures of up to a maximum of 350 bar.


    Further details can be found in the 2.6-655 data sheet.