This ultrafilter adopts dissymmetrical semipermeable film which is made from macromolecule material with special process. The raw liquid flows under pressure, inside or outside the film. The macromolecule substance and colloid particles in the raw liquid are clogged at the film suface and are brought away by circulating raw liquid. Then the raw liquid becomes inspissated, furthermore, the subtance in liquid is seperated, concentrated and refined. 
◎ The Reverse Osmosis Device is an equipment to purify the saline water with the action of pressure difference of semi-permeable membrane. It is called reverse osmosis, as it is counter to natural penetration direction. Different materials have different osmotic pressure. The reverse osmosis method to adopt large osmotic pressures is used to obtain the purpose to separate, extract, purify and concentrate. 
◎ RO can remove more than 97% soluble salts of the water and purify 99% glues, microbe, particulate and organic substances etc. It becomes the most ideal equipment for the pure water, high pure water, and airspace water. The remarkable characteristics of the equipment are shown as lower energy consumption, no pollution, simple technics, high water quality, easy to operation and maintenance.