... and even can simultaneously convey two different liquids.Longer diaphragm life. Diaphragm material from Dopont, Exxon.Pilot type air valve, ... is low.Wetted body: PPH, PVDF, SS304, SS316, Aluminum etc.Diaphragm: PTFE, Hytrel, Santoprene, Viton etc. ModelSizeMax flow (m3/h ... , control the raw material, keep the ball is very round for well seal, Strengthen the pump structure, produce good diaphragm for ...