Description
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 μm) 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
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. The dirt filter may be replaced by competent staff (only NV200, G 1)
On request:
“Smart-option” including
- measurement of outlet pressure
- measurement of outlet gas temperature
- analogue 4 – 20 mA signals
Approvals
Company certified to ISO 9001 and PED 97/23/EC Module H
CE-marked in accordance with PED 97/23/EC
Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems
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