Check Valve: A check valve installed at the end of a drainage pipeline, designed to prevent backflow of external water. The check valve is mainly composed of four parts: the valve seat, valve plate, water seal ring, and hinge. It comes in two shapes: round and square. Traditionally made from various metal products, the material of check valves has now evolved into a variety of composite materials.

The gate is a one-way valve installed at the outlet of drainage pipes along rivers and canals. When the river or canal tide level exceeds the outlet and the pressure is greater than the pipe's internal pressure, the gate panel automatically closes to prevent backflow of river or canal water into the drainage pipe. The gates are available in various models, including suspended, single-door/double-door, and energy-saving types.

The flap gate is composed of four parts: valve seat (body), valve plate, seal ring, and hinge. It is exclusively used for circular and square outlets for one-way water flow. The structure is tight, reliable in operation, and does not require manual operation. The opening and closing force comes from the water pressure source. The gate opens when the water pressure inside the flap is greater than the pressure outside, and closes otherwise.
Applicable Media: Water, River Water, Lake Water, Sea Water, Domestic, Industrial Wastewater
Applicable Range: Suitable for water conservancy systems, municipal wastewater treatment, urban flood control and drainage, sewage treatment plants, waterworks, and more.