Detailed Product Description SWING CHECK VALVESize: 1/2"-40"Rating: ANSI 150Lb-2500LbMaterial:WCB,LCB,WC6,WC9,C5,C12CF8,CF8M,CF3,CF3M,A105,LF2,F304,F316,F304L,F316L,F51Design Standard: API 6D,BS 1868, ANSI B16.34Face to Face Standard: ANSI B16.10End Connection Standard: ANSI B16.5, ,ANSI B16.25Test Standard: API 598, BS 6755Structure Type: Bolted cover and swing type