Big size Swing Check Valve Class 300 Material:Cast Steel, Alloy Steel, Stainless Steel, Special Steel Nominal Pressure:Class 150~2500 Nominal Diameter:2″~48″ End Connection:RF, FF, M, F, TG, RG,RTJ,BW Working Temp.:-29℃~600℃ Design Standard:BS1868,API 6D,ASME B16.34 Test/Inspection:API 598/ISO 5208 Face to Face:ASME B16.10 NACE:NACE 0175 PS：We can manufacture valves as customers’ requirements.