Non-Return Valve NV2000. MWP: 10Bar. DN 80 -200

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Max. working pressure: 10 bar

Air max: 26,800m3/h

Opening pressure: 4mbar

Suitable for the following gases:

Town gas, Natural gas, Methane, LPG

Body: Steel

Sealing material: NBR/CR

Thread sizes: flange DN 80

Item #: 825
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 pressure drops – using complex valve assembly with low opening pressures, NV2000 approx. 5 mbar
  • no leaks – using of a spring-loaded valve assembly with elastomer sealing
  • stainless steel filter (100 μm) in the gas inlet protects the non-return valve (check valve) against dirt contamination, extending the service life
  • diverse applications – useful for many technical gases

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
  • the NV2000 may be mounted vertical in bottom-up flow direction
  • 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 to ISO 9001 and PED 2014/68/EU Module H
CE-marked in accordance with PED 2014/68/EU
Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems


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