Product Type: Check ValveProduct Name:Flage Swing Check ValveProduct Details:Place of Origin: ChinaCertification: ISO9001-CEStandard FeaturesDurable metal-to-metal seatsThermal expansion relief available in 25 or 50 PSI settings200 PSI cold non-shock pressure limit150# raised face flange connectionsConstruction Details:Body and cap: Ductile ironInternal components: Ductile and stainless steelGasket: TeflonExpansion valve: Stainless steel and Viton