Ro membrane/ Reverse osmosis membranes high desalination rate of 99.8% Hydranautics of USA, DOW Most advanced technology used in water treatment field.Models: 40-40, 80-40Brands, DOW, Hydranautics, CSMReverse osmosis membrane is used to purify water and remove salts and other impurities from tap and brackish water. It is also capable of rejecting bacteria, sugars, proteins, particles, dyes, and ...