Detailed Product Description Product DescriptionRF End Check Valve Product Description 1) Material: WCB, LCB, LCC, LC3, WC1, WC6, WC9, C5, C12, CF8, CF8M, CF3, CF3M 2) Class: 150 - 1500lbs 3) Size: 2 - 24" 4) Standards: API6D, BS1868, ANSI B16.34 A) Face to face: ANSI B16.10 B) End flange: ANSI B16.5 C) BW end: ANSI B16.25 D) Test: API598 5) Operator: Handwheel, gear, electric actuator