... .6 API, ASTM, ANSI, DIN, JIS, BS, ISO approved Grooved End Butterfly Valve1)Working temperature: -25*C~120*C2)Applicable medium ... SteelLower Stem: Cr13, SS416, DSS316, Carbon SteelO-Ring: EPDM, Buna, Hypalon, Viton, NBRStandard:Flange End: ANSI B16.1, AWWA C606Top Flange: ISO ...