... convey two different liquids.Longer diaphragm life. Diaphragm material from Dopont, Exxon.Pilot type air valve, low maintenance, low air consumption ... , so the using cost is low.Wetted body: PPH, PVDF, SS304, SS316, Aluminum etc.Diaphragm ... well seal, Strengthen the pump structure, produce good diaphragm for long service time.We treasure the opportunity to ...