... , Ductile Iron, SS, WCB Certification: ISO, CE Butterfly Valves Wafer Type Two Shaft, Disc Without Pin ISO9001 certifiedCE approvalAWWA C504 passedFeature: 1 ... A351 CF8, CF8M, CF3, CF3M, Carbon Steel ASTM A216 WCB4. Disc: NBR ( Buan-N), EPDM, VITON, PTFE5. Shaft & Pin: SS410, SS416 ...