Products DetailsWenzhou Yuzheng Valve Pipe-Fitting Co.,Ltd is one of the leading China double disk swing check valve manufacturers,Website:http://www.yz-valves.com, welcome to wholesale cheap double disk swing check valve from our professional factory.Double Disk Swing Check Valve Wafer PN16 With CE &  ISO StandardsDesign and manufacture as BS1868, ANSI B16.34Face to face dimensions as ANSI B16.10End flange dimension as ANSI B16.5Pressure-temperature ratings as ANSI B16.34Pressure test as API 598Applicable Medium:water ,gas,oil,and other causticity medium.Application:Valve is used for preventing the back-going of medium in pipelines and equipments, and the pressure of medium will bring the result of opening and closing automatically.When the medium is back-going, valve disc will automaticaly closed to avoid accidents.