Henan Liwei Industry Co.,Ltd

We are offering Belled Rubber Duckbill Check Valve.1.25 years experience 2.DN50mm-3000mm3.auto open and close3.ISO9001&ISO14001 Belled rubber duckbill check valve introduction: Belled rubber duckbill check valve should be installed in the valve body part adopts the design of sleeve, sleeve into the matching connection pipe, pipe and sleeve lining can besmear water glue sealing, and use the stainless steel clamp. Clamp should add gasket between the bayonet, spelling a tight link bolt, if using auxiliary liner, connection, secondary liner and reserved pipe seal welding, pay attention to when the nominal diameter is larger than the DN800, because of its high body weight, combined with the work, the body a lot of water in the abdominal cavity and flow impact, must increase the supporting rod, lift the body to keep stable for a long time. (Above DN800, the body has the rings). 2.Characteristics: The advantages is specially marked in comparison with traditional duckbill check valve : a) Open and close automatically in security and reliability according to hydraulic difference without noise and in no need of operator and maintenance. b) Positive start has little water resistance and start-up pressure and the flow can be adjusted naturally according to hydraulic pressure. c) Reserve cut-off has good seal without leakage to prevent from flowing backwards. the back pressure is higher and the effect is barrier. d) Anticorrosion, aging resistance, deformation resistance, strong adaptability and long use life e) Wide size scope, nominal diameter of DN50-DN3000. 3.Application: 1)sewage system 2)dishcarge system 3)dyke discharge 4)drainage of airport and freeway 5)sewer discharge 6)sewage lagoon discharge 7)smell separetion 4. Check duckbill valve installation structure type 1) Belled XF-T be installed at the exit of drainage pipe 2) Flanged XF-T be installed at the exit end with flange of drainage pipe 3) Mounting plate XF-F be installed on the building at the water exit end. 4) Build-in XF-F be installed at the exit end of rain and sewage system in cities. 5) Grout or cement pipe XF-T be installed at the end of grout or cement pipe.

We are offering flange rubber flexible check valve. Flexible check valve is a new water supply and drainage valve with full rubber structure, duck-mouthed appearance and functions of positive flow-in and reserve cut-off. According to thrust analysis and calculation as well as different operation conditions, it is manufactured with different design mechanism and different rubber products by special processing, at positive operation the water flow inform entrance and the valve will be open at weak hydraulic pressure. The hydraulic pressure is higher .the valve gate will open more greatly and the water flow is greater , at reserve operation, the valve gate closes naturally and seals tightly cut-off valve, the back pressure is higher, the valve gate closes more tightly and the seal effect is better. It is used widely in various drainage exits to prevent from pouring backwards and flowing backwards in city planning, water conservancy and sewage disposal etc, it is the ideal product to replace flap valve.