Cast Iron Flap Gate

Cast iron flap gate is a type of check valve that automatically controls opening and closing using the pressure difference inside and outside the pipeline. It is primarily used to prevent backflow of external water and is widely applied in fields such as water conservancy and municipal sewage.
Structural Composition
It consists of four parts: valve seat, valve plate, sealing ring, and hinge. Made of cast iron, it features a tight and reliable structure. The valve plate closes with the assistance of its own weight or buoyancy, while the sealing ring ensures leak-proof performance.
Working Principle
It automatically opens for discharge when the internal water pressure of the pipeline exceeds the external pressure, and closes automatically when the external water level is higher than the internal level. This check valve characteristic effectively prevents tidal water from rivers from flowing back into drainage pipelines.
Applicable Scenarios
Suitable for media such as water, sewage, and seawater. Installation methods include flange connection or concrete embedding, supporting both circular and square outlets.
Performance Advantages
Energy Efficiency: No manual operation required; it opens and closes automatically based on water pressure, reducing energy consumption.
Durability: Cast iron material ensures a long service life with simple maintenance.
Convenience: Simple structure, no external force needed for switching, making it suitable for applications in water conservancy, municipal sewage, urban flood control, and drainage.