Grooved End Butterfly Valve Size(mm): DN50-300 Nominal Pressure(MPa): 1.6 API, ASTM, ANSI, DIN, JIS, BS, ISO approved Grooved End Butterfly Valve1)Working ... , Carbon SteelO-Ring: EPDM, Buna, Hypalon, Viton, NBRStandard:Flange End: ANSI B16.1, AWWA C606Top Flange: ISO 5211Grooved End: AWWA C606 Grooved End Butterfly Valve