Application scenarios：
Flap gate, primarily used at the outlet of water pump discharge pipes or in pumping station culverts, to prevent backflow from rivers or tidal waters.
Structure&Principle：
This device adopts a dual-hinge structure and is a type of check valve installed at the outlet of drainage pipes along riverbanks. When the river or tidal water level rises above the pipe outlet, and the external water pressure exceeds the internal pipe pressure, the flap gate automatically closes to prevent river water from backflowing into the drainage pipeline.
Main Features：
1. The flap gate does not require any power; it automatically opens and closes according to the water level and is easy to install and maintain.
2. Operating water pressure: maximum operating water pressure is 6 meters.
3. The closing characteristics include minimal vibration and impact.
4. It closes under the weight of the door leaf, and the leakage rate of the flap gate in the closed state does not exceed 20 L/min·m.
5. The gate body and door plate are equipped with lifting lugs and rings for convenient transportation and handling.
6. Available materials include cast iron and stainless steel.
Model Description：
