slap door

The Rongcheng Water Conservancy flap valve series is made of various materials such as cast iron, carbon steel, stainless steel, and composite materials (glass fiber reinforced plastic). There are also many types of flap valves, such as floating box flap valves, flat plate flap valves, and sleeve flap valves.

The flap valve is a one-way valve installed at the outlet of drainage pipes along rivers and streams. 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 valve panel automatically closes to prevent the tidewater from flowing back into the drainage pipe. Currently, flap valves are available in models such as suspended type, single-door/double-door, and energy-saving type. We welcome your purchase.