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Non-Return Valve NV800

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Non-return valve for the prevention of unintended gas mixtures, for flow rates up to 14000 m³/h (air)

  • safety element: non-return valve [NV]
  • every non-return valve 100% tested
  • protects against flashbacks for fuel gas-compressed air-mixtures
  • offer minimum pressure drops – using complex valve assembly with low opening pressures (approx. 6-8 mbar)
  • dirt filter (100 μm) on gas inlet
  • may be mounted in any position / orientation
  • 200 X 350 mm, 20 kg
  • Information
  • Applications
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WITT non-return valves for reliable protection against dangerous reverse gas flow.
Every non-return valve 100% tested.

Benefits:

  • a spring-loaded non-return 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, NV800 approx. 6 - 8 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 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 are used to protect equipment and pipelines against dangerous reverse gas flow. Use is possible for applications in accordance with EN 746-2
  • non-return valves are proved in accordance with EN 730-2. They may also be used as a safety device to protect against flashbacks (proved in accordance with EN 730-1 point 6.7), which may result from the combustion of natural gas/ LPG with air
  • the maximum ambient / working temperature is 70 °C / 158 °F

Maintenance:

  • annual testing of the non-return valve and body leak tightness is recommended
  • non-return valves are only to be serviced by the manufacturer

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 NV800 is used in following areas:

Here you find all downloads for the product.

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WITT Zentrale

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