... 3.Voltage:380V,50HZ,5.5kw Drinking water reverse osmosis equipmentDesign foundation:1.Raw water qulaity:Tap water2 ... :1.Typically the whole system contains pretreatment system,reverse osmosis devices,post-treatment system,cleaning system,and electrical ... circumstances of raw water.3.Reverse osmosis unit include multi-stage high-pressure pump,reverse osmosis membrance element,membrance shell (pressure ...