Dequn produces flap valves (tide gates) in cast iron, steel, FRP/composite, and stainless steel, including energy-saving side-flip, float-box, and integral folding designs.
Operation is automatic: the door opens or closes according to the water-level difference between the outlet and the protected side. No hoist or power supply is required, which reduces equipment and civil-work cost.
Key advantages
- Effective prevention of river or tidal backflow at pipe and culvert outlets
- Compact installation at the end of pipelines or culverts; no machine room needed
- Fully automatic operation with low supervision demand during flood season
- Material options for sewage, river water, and seawater conditions
- Low head loss when open; large flow passage helps reduce siltation
Typical applications: municipal stormwater and sewage outlets, drainage culverts, and coastal/riverside discharge points.
