Reverse Osmosis RO Water Filtration is a high-tech membrane separation technology driven by pressure difference. It has the characteristics of high degree of primary separation, no phase change, simple and efficient.The "aperture" of the reverse osmosis membrane is as small as nanometer (1nm=10-9m), and no "filtration" holes can be seen on the surface under the scanning electron microscope.Under the operating pressure higher than the osmotic pressure of raw water, water molecules can reverse osmosis through RO semi-permeable membrane to produce pure water, and a large number of inorganic ions, organic matter, colloids, microorganisms, thermogens in raw water are trapped by RO membrane.
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Note: In case of inconformit of date in the table due to technical improvement or customization ,the real object shall prevail.
Generally, when the conductivity of raw water is less than 200 S/cm, the conductivity of grade 1 RO pure water is less than 5 S/cm, which conforms to the grade 3 water use standard of the laboratory.For the areas with high raw water conductivity, in order to save the replacement cost of follow-up mixed bed ion exchange resin and improve the quality of pure water, the customer may consider the second-level reverse osmosis purification system. The conductivity of second-level RO pure water is about 1~5 × S/cm, which is related to the quality of raw water.Reverse osmosis principle: the same volume of dilute solution (such as fresh water) and thick liquid (such as sea water or salt water), respectively, on both sides of the container, separated by a semipermeable membrane, dilute solution of the solvent nature through a semipermeable membrane, flowing the concentrated solution side, the side of the strong solution liquid level than the dilute solution of liquid level above a certain height, and form a pressure difference, achieve osmotic balance state, the pressure difference is the osmotic pressure of osmotic pressure is determined by the size of the thick liquid type, concentration and temperature has nothing to do with the nature of a semipermeable membrane.If a pressure greater than the osmotic pressure is applied on the side of the concentrated solution, the solvent in the concentrated solution will flow to the dilute solution. The direction of the flow of this solvent is opposite to the original direction of penetration. This process is called reverse osmosis.