... Concentric Butterfly Valve <SP-68Flanged Ends: ASME B16.5, ASME B16.47Face to Face ... drivingButterfly ValveSingle Eccentric Butterfly ValveDesign Standard: API 609, MSS. SP-68Flanged Ends: ASME B16.5, ASME B16.47Face to Face ... : API 609, ASME B16.10, MSS. SP-68Connection: Lug, Wafer, Flange, Weld ConnectionDriving Manner: Hand wheel, ...