Gas non-return valve NV400

flangesafetystainless steel

Non-return valve (intermediate flange version) for the prevention of unintended gas mixtures, for flow rates up to 8100 m³/h (air), up to 16 bar, for use in thermal processing plants, certified to EN746-2, DN 40/50 with welding neck flanges for simple installing and removing safety element: non-return valve [NV] every non-return valve 100% tested ultra-low opening pressures (approx. 3 mbar), ultra-low pressure drop ideal for biogas desulphurisation systems dirt filter (100 μm) on gas inlet WITT non-return valves for reliable protection against dangerous reverse gas flow. Now available also with welding neck flanges for simple installing and removing. 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 low pressure drops – using complex valve assembly with low opening pressure – approx. 3.0 mbar no leaks – using of a spring loaded valve assembly with elastomer sealing stainless steel filter (100 μm) in the gas inlet protects the non-return valve against dirt contamination, extending the service life dirt filter in gas inlet are replaced quickly and easily 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 non-return valve as „intermediate flange version“ guarantees quick and uncomplicated removal and installation at replacement and annual testing