brass non-return valve

WITT non-return valves (check valves) for reliable protection against dangerous reverse gas flow.
Every non-return valve (check valve) 100% tested. The best non-return valves (check valves) in the world

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 (Model NV200 ? approx. 4 mbar)
no leaks ? using a spring-loaded valve assembly with elastomer sealing
stainless steel filter (100 ?m) in the gas inlet protects the non-return valve (check valve) against dirt contamination, extending the service life
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 (check 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 (check valves) may be mounted in any position / orientation
the maximum ambient / working temperature is 70 ?C / 158 ?F