Tap door: a check valve installed at the end of the drainage pipeline, with the function of preventing external water from flowing back. The door is mainly composed of four parts: valve seat, valve plate, water seal ring, and hinge. The shapes are divided into circular and square. The material of door clappers has traditionally been various metal products, but now it has developed into various composite materials. It is a one-way valve installed at the outlet of the drainage pipe by the river. When the tide level of the river is higher than the outlet pipe and the pressure is greater than the pressure inside the pipe, the flap panel automatically closes to prevent the river tide from flowing back into the drainage pipe.

The door is composed of four parts: valve seat (valve body), valve plate, sealing ring, and hinge.

Applicable media: water, river water, river water, seawater, domestic and industrial wastewater
Scope of application: Suitable for water conservancy systems, municipal sewage, urban flood control and drainage, sewage treatment plants, water treatment plants, etc.

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