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 opening pressure approx. 250 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
• the maximum ambient/working temperature is 70 °C / 158 °F

Maintenance:

• annual testing of the non-return valve, body leak tightness and flow capacity 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 2014/68/EC Module H
CE-marked in accordance with PED 2014/68/EC
Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems