Cost-effective isolation of air intake pipes at filters and separators


Q-Flap RX™ non-return explosion valves can be used to isolate explosions effectively in virtually all industries. The Q-Flap RX™ is suitable for aspiration lines of filtering separators and suction lines at mills.

non return explosion valve Q-Flap RX
The Q-Flap RX™ ensures reliable explosion isolation to protect your plant
and minimize the effects of an explosion.


Normal operation

The flap is mounted on the intake side and kept open during normal operation by the flow of process air. In the case of a breakdown, the flap closes under its own weight.


Explosion event

When an explosion occurs, the flap is closed by the pressure front that spreads through the duct. The explosion can spread no further through the pipe. Employees working at capturing points or system components beyond the valve flap are protected against the effects of the explosion.

Your advantages

  • Fully opening the inspection cover provides quick access for maintenance without the complete removal of the unit.
  • Flexible use in your process: Q-Flap is available for all standard nominal widths up to DN 400. Further sizes up to DN 1250 available summer 2019.
  • Optional: Integration of a monitoring function.




EC type examination
certificate no.
FSA 14 ATEX 1653 X


Meets the requirements of NFPA 69 (Option)

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