Steel flap doors are divided into vertical axis steel flap doors, ordinary flap doors, floating box flap doors, reservoir drainage flap doors, etc.
Purpose: Paimen is a one-way valve installed at the outlet of drainage pipes along 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 Paimen panel automatically closes to prevent the river tide from flowing back into the drainage pipe. According to customer requirements, flange pipe connections, wall connections, and pump station pipelines can be selected. Or it can be used at the bottom of large, medium, or small reservoirs and opened manually with a hoist. Square or rectangular exit, simple structure, reliable operation, no need for manual operation, can be connected with flanges or fixed with embedded parts.