Reverse osmosis tschnology (RO) is a process of dissolving and separating substances by using apolymer membrance.The reverse osmosis equipment is mainly composed of a reverse osmosis main component,supplemented by a multistage centrifugal pump,a high pressure pipeline control valve,a pressure protection device,and the like.It can effectively trap dissolved salts,small molecules,colloids and microorganisms in water.Desalting with reverse osmosis membrane is more efficient and economical than general ion exchange and distillation.It can be use in the electionics and pharmaceutical industrise to produce pure water and desalination of seawater and brackish water.