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 back feeding of gases which could lead to unwanted gas mixtures ● no leaks – using of a spring loaded valve assembly with elastomer sealing, opening pressure approx. 2 bar ● diverse applications – useful for many technical gases Operation / Usage ● non-return valves are used to protect equipment and pipelines against dangerous reverse gas flow ● ideal for use with corrosive gases in the chemical industry, process technology or in the laboratory area ● WITT non-return valves may be mounted in any position /orientation