WITT non-return valves for reliable protection against dangerous reverse gas flow. Every non-return valve 100% tested.
The best non-return valves in the world.
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
Operation / Usage:
non-return valves are used to protect equipment and pipelines against dangerous reverse gas flow. Use is possible for applications according to EN 746-2
WITT non-return valves may be mounted in any position / orientation
the maximum ambient / working temperature is 60 °C / 140 °F
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 ISO 9001 Designed for Oxygen Service according to EIGA IGC Doc 13/12/E: 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