Non-Return Valve NV654

Non-return valve for the prevention of unintended gas mixtures, for flow rates up to 130 m³/h (air), up to 60 bar

safety element: non-return valve [NV]
every non-return valve 100% tested
ultra-low opening pressures (approx. 30 mbar), ultra-low pressure drop
small and light: 14 X 42 mm, 39 g
up to 60 bar working pressure (O2: up to 30 bar)
air max. 130 m³/h (free flow-off)

This model is also available in Stainless Steel

Information

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

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