Wafer Silencing Check Valve

Specifications of Wafer Silencing Check Valve H7B71X wafer silencing check valve is mainly used in pipeline system in water supply and drainage system in high-rises, air-conditioning refrigeration, waterworks, fire control departments, etc. functioned to avoid backflow of mediums. it is featured by outstanding capability to eliminate noise, short structural length, lightweight and sound sealing performance. the streamline design of valve body chamber greatly lowers the resistance of fluid. 1) Size: 2" - 20" 2) Class: 150lbs - 600lbs Technical standards: 1) Design and manufacture: API 6D 2) Face-to-face: ANSI B16.10 3) Flange end: ANSI B16.5 4) Inspection and test: API 598 Main materials: 1) Body and bonnet: cast iron, ductile cast iron 2) Disc and pressing - plate: CS - WCB, WCA, WCC, A351, 304, 340L, 316, 316L, 17-4PH 3) Lead seat: brass 4) Seal ring: NBR