The differences between flanged duckbill valve, built-in duckbill valve, and clamp type duckbill valve

The Built-in Duckbill Valve is an enhancement of the Flanged Duckbill Check Valve, featuring an additional metal cavity with flanges at both ends, capable of replacing traditional pipeline check valves. In comparison, the built-in Duckbill Valve offers greater reliability, is maintenance-free, and lighter in weight, making it highly valuable for promotion. During installation, it can be directly connected to the pipeline flange and secured with bolts, offering a simple, convenient, and easy-to-operate installation process.

The sleeve-type duckbill valve adopts a sleeve design at the valve body's installation section, which is inserted into a matching connecting pipeline. Waterproof adhesive can be applied between the pipeline and the inner wall of the sleeve for sealing, and a Metal Hose clamp is used. Appropriate gaskets should be added between the clamp's jaws, and the connecting bolts should be tightened. If an auxiliary liner pipe is used, it should be sealed and welded to the reserved pipeline during connection. It's important to note that when the nominal diameter exceeds DN1000, due to the significant weight of the valve body and the impact of a large amount of residual water and water flow within the valve's cavity during operation, a supporting tension rod must be added to securely suspend the valve body for long-term stability (valve bodies above DN1000 are all equipped with auxiliary positioning rings).