Industrial Tiny Drag Slow Shut Check Valve Material:WCB CF8 CF8M Nominal Pressure:Class 150~2500 Nominal Diameter:2″~24″ End Connection:RF, FF, M, F, TG, RG Working Temp.:-196~425°c Design Standard:BS1868,API 6D,ASME B16.34 Test/Inspection:API 598/ISO 5208 NACE:NACE 0175 PS：We can manufacture valves as customers’ requirements.