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Non-Return Valve NV654

Data sheet Quotation request

Non-return valve for the prevention of unintended gas mixtures, for flow rates up to 11,059 scfh (air), up to 870 psi

  • safety element: non-return valve [NV]
  • every non-return valve 100% tested
  • ultra-low opening pressures (approx. 0.435 psi), ultra-low pressure drop
  • small and light: 0.55 X 1.64 inches, 1.56 oz
  • up to 870 psi working pressure (O2: up to 435 psi)
  • air max. 11,059 scfh (free flow-off)

This model is also available in Stainless Steel

     

Information

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

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 (approx. 30 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
  • compact design, small mounting dimensions

Operation / Usage:

  • non-return valves (check valves) are used to protect equipment and pipelines against dangerous reverse gas flow
  • 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

Approvals
Company certified to ISO 9001 and PED 97/23/EC Module H
Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems

Downloads

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Accessories

Test Rig 722

For the annual testing of WITT flashback arrestors and check valves

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Headquarters: +49 (0)2302-8901-0
WITT USA: +1 770-664-4447

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