Medical chemical cosmetic pure water production plant RO water treatment system The RO water purifying system firstly produced for such industries as cosmetics, pharmacy, food and electronics has been deeply favored by users for its stable water quality and simple operation. The system solves the troubles of frequent regeneration and cleaning during the use of ion exchanging water purifier. By adopting physical principle, it enables the water to pass the reverse osmosis film with a diameter of one ten-thousandth of a micron and separates impurities, ion, microbes and colloids in the water, so as to meet the water requirements in cosmetics, pharmacy, electronics and food industries.