Grooved End Butterfly Valve Size(mm): DN50-300 Nominal Pressure(MPa): 1.6 API, ASTM, ANSI, DIN, JIS, BS, ISO approved Grooved ... : cast iron, ductile iron, stainless steel and carbon steelDisc: ALB, Monel, CF8M, WCB, Ductile Iron. Upper Stem: Cr13, SS416, SS316, ... Ring: EPDM, Buna, Hypalon, Viton, NBRStandard:Flange End: ANSI B16.1, AWWA C606Top Flange: ISO 5211Grooved End: AWWA C606 Grooved End ...