flange/hoop rubber duckbill valves
Product Description
sewage rubber check valve
It is a new water supply and drainage valve with full rubber structure. It is used widely in various drainage exit to prevent from pouring backward and flowing backward in city planning, water conservancy and sewage disposal etc. It is the ideal product to replace flap valve.
Product features:
The advantage is specially marked in comparison with traditional flap valve.
1.Open and close automatically in security and reliability according to hydraulic difference without noise and in no need of operator and maintenance.
2.Positive start has little water resistance and start-up pressure and the flow can be adjust naturally according to hydraulic pressure.
3.Reserve cut-off has good seal without leakage to prevent from flowing backward. The back pressure is higher and the effect is better.
4.Anticorrosion, prevent aging, strong applicability and long use life.
5.Wide size scope, nominal diameter of DN20-2400.
6.Check valves are used in the installation of hydraulic systems to let liquids flow in one direction but prevent them from flowing in the opposite direction. In many applications these valves - made of steel or cast iron - which are heavy as well as costly and need constant maintenance, are replaced by the so-called Duck Bill Check Valves.
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