Wafer Butterfly Valve NO. Part name Material 1 Body ASTM A536 65-45-12, WCB, CF8M 2 Disc ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462 3 Seat EPDM,NBR,FRM.PTFE 4 Stem SS420,SS431 5 Lower Stem SS420,SS431 6 Retailner Nylon for DN50-DN300, SS304 for DN350-DN2000 7 Bearing RPTFE with Graphite 8 Weather seal NBR 9 Nuts Stainless […]