Butterfly Type Check Valve

KOSEN Butterfly Type Check Valves is a double offset , triple offset butterfly type check valve. It is equipped with a buffer to slow down the closing speed to make partial medium enter the system in order to greatly eliminate the backflow slamming and the destructive pressure surge when pump stops working. It is mainly mounted at outlet side of the pump station in industrial water recycling supply system, urban water supply system, high-rise buildings and modern hotels. The model is designed to have non-vibration non-slam performance in consideration of special application environment. It has good sealing, smooth operation, long service life, energy saving advantage to make the living environment quiet and comfortable.

Technical Specification
Normal Size Range: DN200- DN1400
Normal Pressure Rating: PN10-PN25
Material: GG25, GG40, WCB
Temperature Range: -29°C~425°C

Standards compliance
Design and Manufacture: GB12236
Face to face(end to end): GB12221
Flanged connection: JB/T79-1994
Test and inspection: JB/T9092-1999