Non-Return Valve NV654

Non-return valve for the prevention of unintended gas mixtures, for flow rates up to 11,059 scfh (air), up to 870 psi, G 1/8

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 60 °C / 140 °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 2014/68/EC Module H
Designed for Oxygen Service in accordance with EIGA 13/20 and CGA G-4.4: Oxygen Pipeline and Piping Systems
Cleaned for Oxygen Service in accordance with EIGA 33/18 and CGA G-4.1: Cleaning of Equipment for Oxygen Service