API double flange butterfly valve Size:DN50~DN1200 Class Range:150Lb-300Lb Connection size:flange,wafer material:WCB CS API double flange butterfly valveFeature1. Three eccentric ... , high strength, flow area large, small flow resistance.4. The valve has a two way sealing function, the installation media from ... any direction,Welcome to contact me as follows:About us API double flange butterfly valve