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WITT FRANCE SARL

Non-Return Valve NV654

Check valve

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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 (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 are used to protect equipment and pipelines against dangerous reverse gas flow
  • WITT non-return 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 and body leak tightness is recommended
  • WITT is happy to supply special test equipment
  • non-return valves are only to be serviced by the manufacturer

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