Structure of Flange Type Duckbill check valve
Introduction of Duckbill Check Valve:
The advantage of rubber duckbill valves 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 DN50-2400.
