3 Way Pneumatic Diaphragm Control Valve:  Type Three Way Pneumatic Diaphragm Control Valve Nominal Diameter DN25~DN250(1”to 10”) Nominal Pressure PN16,25,40,64,100(150lb,300lb,600lb) Flow Characteristic Equal Percentage,Linear   Rangeability 50:1 Up Bonnet From Standard Type:Cast Steel :-20~250℃,Stainless Steel:-40 to 250℃ Fin-Extension Type:Cast Steel:-29~425℃   Stainless Steel:-40 to 450℃ Seat Leakage Soft Sealing Main Parts and Materials:   Item Part Name […]