Non-Return Valve 600H-ES. MWP: 16Bar, ½”, 3/4″ & 1″BSP

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Max. working pressure: 40 bar

Air max: 3900m3/h

Opening pressure: 100mbar

Suitable for the following gases:

Town gas, Natural gas, LPG




Compressed air

Non-flammable gases

Body: Stainless steel

Sealing material: Elastomer

Thread sizes: 1/2″, 3/4″ & 1″ BSP F

Also available in brass

Item #: 831
Quantity Available: 100

100 in stock


WITT non-return valves (check valves) for reliable protection against dangerous reverse gas flow. Every non-return valve (check valve) 100% tested.


  • a spring-loaded non-return valve (check valve) prevents a reverse flow of gases which could lead to unwanted gas mixtures
  • low opening pressure approx. 250 mbar
  • no leaks – using a spring-loaded valve assembly with elastomer sealing
  • diverse applications – useful for many technical gases
  • reduce installation costs – the spring-loaded valve is not affected by gravity and may be installed in any orientation

Operation / Usage:

  • non-return valves (check valves) are used to protect equipment and pipelines against dangerous reverse gas flow
  • the maximum ambient / working temperature is 70 °C / 158 °F


  • annual testing of the non-return valve (check valve), body leak tightness and flow capacity is recommended
  • WITT is happy to supply special test equipment
  • non-return valves (check valves) are only to be serviced by the manufacturer

Company certified to ISO 9001and PED 97/23/EC Module H
CE-marked in accordance with PED 97/23/EC


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