Non-Return Valve NV100. MWP: 25Bar. 1/8″, ¼”, 3/8″BSP

Reviews (0) | Write a Review


Max. working pressure: 25 bar

Air max: 130m3/h

Opening pressure: 30mbar

Suitable for the following gases:

Town gas, Natural gas, LPG



Compressed air

Non-flammable gases

Body: Brass

Sealing material: NBR/CR

Thread sizes: 1/8″, 1/4″, 3/8″ BSP

Item #: 815
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.

The best non-return valves (check valves) in the world.


  • a spring-loaded non-return valve (check valve) prevents a reverse flow of gases, which could lead to unwanted gas mixtures
  • low pressure drops – using complex valve assembly with low opening pressures (Model NV100 – approx. 30 mbar)
  • no leaks – using a spring-loaded valve (check 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. Use is possible for applications according to EN 746-2
  • WITT non-return valves (check valves) may be mounted in any position / orientation
  • the maximum ambient / working temperature is 70 °C / 158 °F


  • annual testing of the non-return valve (check valve) and body leak tightness 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 ISO 9001 and PED 97/23/EC Module H
CE-marked in accordance with PED 97/23/EC
Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems


View PDF File


There are no reviews yet.

Be the first to review “Non-Return Valve NV100. MWP: 25Bar. 1/8″, ¼”, 3/8″BSP”

Your email address will not be published. Required fields are marked *