Detailed Product Description Single Disc Wafer Swing Check Valve Features:Sizes 1/2"-60";DN15- ... B16.5Inspection & Test: API598Material:Cast Steel:ASTM A216 WCA,WCB,WCCStainless Steel: ASTM A351CF3,CF3M,CF8,CF8M,CF8C,F304,F316,F304L ... ,F316L,F321,F347Cr-Mo Steel: ASTM A217 WC1,WC6,WC9,C5,C12,C12A,F11,F22, ... F5,F9,F91Low Temperature Steel: ASTM A351 LCA,LCB,LCC,LC1,LC2,LC3