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Non-Return Valve NV200

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Non-return valve for the prevention of unintended gas mixtures, for flow rates up to 67,067 scfh (air), up to 232 psi

  • safety element: non-return valve [NV]
  • every non-return valve 100% tested
  • ultra-low opening pressures (approx. 0.058 psi), ultra-low pressure drop
  • ideal for biogas desulphurization systems
  • 2.03 X 2.54 inches, 23.56 - 29.8 oz
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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

Benefits:

  • 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 NV200 – approx. 4 mbar)
  • no leaks – using 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
  • 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

Maintenance:

  • 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. The dirt filter may be replaced by competent staff (only NV200, G 1)

Approvals
Company certified to 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

Non-Return Valve NV200 is used in following areas:

Test Rig 722

For the annual testing of WITT flashback arrestors and check valves

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