Detailed Product Description Single-disc Lift Wafer Check Valve Features:Sizes 1/2"-60";DN15-DN1500Class ... ANSI B16.5Inspection & Test: API598Material:Cast Steel:ASTM A216 WCA,WCB,WCCStainless Steel: ASTM A351 CF3,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