... Iron, Ductile Iron, SS, WCB Certification: ISO, CE Butterfly Valve Lug Type ISO9001 certifiedCE approvalAWWA C504 passedFeature: 1. Design Complies with ... A216 WCB4. Disc: NBR ( Buan-N), EPDM, VITON, PTFE5. Shaft & Pin: SS410, SS416, SS304, SS316 6. Actuator: Lever, Gear, Penumatic and ...