1.DN50-DN1200 2.PN6/10/16/25 3.Design:EN593,API609,MSS67-1995. 4.Stable drive torque. 5.Good quality and best prices. Name :2''~20'' Wafer type butterfly valves / centerline butterfly valve / Valves / Butterfly valves. Brand : TST . we also do Brand production . NameWafer type butterfly valve Design standardEN593 ,API609 , MSS SP-67 Face to faceAPI609 ,ISO5752 Series20 ,BS5155 , MSS SP-67 Tubing ...