Flanged Butterfly Valve NO. Part name Material 1 Body ASTM A536 65-45-12, WCB, CF8M Bonded with NBR or EPDM 2 Disc ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462 3 Stem SS420,SS431 4 Screw SS304 5 Retainer SS201 6 Weather seal NBR 7 Bearing RPTFE with Graphite 8 Lower Stem SS420, SS431 9 Bottom […]