... , SS, WCB Certification: ISO, CE Butterfly Valves Wafer Type Two Shaft, Disc Without PinISO9001 certifiedCE approvalAWWA C504 passedFeature: 1. Design ... A216 WCB4. Disc: NBR ( Buan-N), EPDM, VITON, PTFE5. Shaft & Pin: SS410, SS416, SS304, SS316 6. Actuator: Lever, Gear ... Penumatic and Electric ActuatorMedium: Fresh water, sewage, sea water, air, vapour, acid, alkalis and so on.For catalog, Pls visit ...