... Iron, SS, WCB Certification: ISO, CE Butterfly Valves Wafer Type Two Shaft, Disc Without PinISO9001 certifiedCE approvalAWWA C504 passedFeature: 1. Design Complies ... ASTM A216 WCB4. Disc: NBR ( Buan-N), EPDM, VITON, PTFE5. Shaft & Pin: SS410, SS416, SS304, SS316 6. Actuator: Lever, Gear, Penumatic ... .For catalog, Pls visit www.metalvalves.com Butterfly Valves Wafer Type