safety element: non-return valve [NV]
every non-return valve 100% tested
EN730-2
ultra-low opening pressures (approx. 30 mbar), ultra-low pressure drop
small and light: 14 X 42 mm, 39 g
up to 60 bar working pressure (O2: up to 30 bar)
air max. 130 m³/h (free flow-off)
WITT non-return valves (check valves) for reliable protection against dangerous reverse gas flow. Every non-return valve (check valve) 100% tested.
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 (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
compact design, small mounting dimensions
Operation / Usage:
non-return valves (check valves) are used to protect equipment and pipelines against dangerous reverse gas flow
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
Approvals
Company certified to ISO 9001 and PED 97/23/EC Module H
简体中文
English
