... actual dry suction can reach to 4~7m.High roundness valve ball for use the ball mill ... material from Dopont, Exxon.Pilot type air valve, low maintenance, low air consumption, so the using cost is ... ModelSizeMax flow (m3/h)Max head (m)Max inlet air pressure (bar)Suction lift (m) QBY1010mm0.85075 QBY1515mm15075 ... cooperate with you, weclome your inquiries, thanks. air operated double diaphragm pump