... . 3. Metal pump: precision casting. 4. Longer diaphragm life Our air operated diaphragm pump is different from most of other Chinese pump ... life. Diaphragm material from Dopont, Exxon. Pilot type air valve, low maintenance, low air consumption, so the using cost is low.Wetted ... etc. ModelSizeMax flow (L/min)Max head (m)Max inlet air pressure (bar)Suction lift (m)Max particle (mm)DryWetMK151/2 ...