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