Feature:Wafer check valves are designed for hvacAnd general service applications. They are lighter,More compact, utilize half the number of studs forInstallation and in some sizes offer more flowCapacity than conventional swing check valves. TheTwo spring-loaded plates close when the flowDecreases, without the necessity of reverse flow.Lightweight&compact designAluminum bronze disc platesBuna-n seat bonded to body for leak tight sealingSilent check valveSize:2" - 60"(dn50- dn1500)Pressure:ANSI 125lb/150lb/300lb/600lb/900lb/1500lbJis 5k/7.5k/10k/16k/20kDin pn10/pn16/pn25/pn40Type: WaferISO9000Certified