Can be directly installed on the inner side of the pipeline without the need for additional ancillary structures;
Using special inner lining membrane flap material, the membrane flap adheres tightly to the inner wall;
When overflows occurs, the membrane flap opens under the action of water pressure and overflows into the river;
When the water level in the outer river is high, the membrane flap subsidizes the inner wall under the water pressure of the outer river to prevent the back flow of the outer river water;
Low head loss, suitable for installation in low-lying areas with limited driving head;
Water-power control, no operating costs, reliable operation, and simple maintenance.
