... to API609 Face to face:ANSI B16.10 Tubing flange:BS,DIN,JIS,ANSI, Driving Style:Lever,gear,actuator ... structure friction of the sealing ring, providing the valve a long service life.3, Bubble-tight sealing ... and metal seated) gate valves, globe valves,check valves,butterfly valves, ball valves, plug valves strainers, etc.in ... for business cooperation and visit our company. flange butterfly valve