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Non-Return Valve 654-ES

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Non-return valve stainless steel 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
  • EN730-2
  • ultra-low opening pressures (approx. 30 mbar), ultra-low pressure drop
  • also ideal for use with corrosive gases
  • 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. 4,589 scfh (free flow-off)

     

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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.

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

Here you find all downloads for the product.

Test Rig 722

For the annual testing of WITT flashback arrestors and check valves

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