Diaphragm non-return valves

Diaphragm non-return valves

This check valve type consists of a housing part included with a rubber diaphragm. The medium – often drinking water, waste water of rain water-, pushes the diaphragm aside creating an opening. Whenever the medium flows back or stops, the diaphragm will return to its original position, shutting of the line. By doing so, the component acts as a non return valve securing critical equipment.

This design offers the following advantages:

  1. Minimum wearing due to the absence of moving parts
  2. Soundless action due to the absence of a disc
  3. Suitable for both horizontal and vertical pipelines
  4. This check valves stops sewage stench / smells as well
  5. Easy to mount
Membraam terugslagkleppen


  • Size range: DN15 to DN200
  • Pressure range: 0 barg to 16 barg (PN10-16 & 150lbs.)
  • Temperature range: -20⁰C to 220⁰C
  • Design: 1 piece housing
  • Tightness: uni-directional tightness
  • Housing material: stainless steel
  • Sealing material: EPDM, Silicone. NBR, Viton
  • Drinkwater usage: yes
  • Two design types: Stop Silent and Stop Silent Light

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