... butterfly valve Design standardEN593 ,API609 , MSS SP-67 Face to faceAPI609 ,ISO5752 Series20 , DIN3202 , MSS SP-67 Tubing flangeBS ... technical ability and production capacity , from originally product design , to casting , machining and final product assembly. Any questions about ... Valves you can contact me directly , sincerely hoping to make coorperation with your company. Cast iron butterfly valve