High purity water facility is working with RO facilities combining with ion-exchange bed or EDI, ion-exchange bed is working by ion-exchange resin in electrolyte solution, can be used to wipe off all kinds of kation and anion, is a method to produce high purity water, which can not be substituted. Ion-exchange equipment is of kation exchanging equipment and anion equipment. When the raw water passing ion-exchange pole, the kation and anion(HCO3-plasma ion) in water will exchange with H+ in positive resin and OH- in negative resin to get salt taking-off. The combination of kation and anoin will get water higher purified

EDI(Eiecterodeionization)is a new pure water and super water pure water producing techics which developed from 1990s. The technics skillfully integrate electrodialysis and ion-exchange, throught selectively permeating to kation and anion, and exchanging to ions, get the ion to move in a direction under DC to complete salt taking-off water, meanwhile super pure water can be produced continuously without acid &alkali chemical regeneration
Ion-exchange is a method to wipe off the electrolyte in water by use of selection and balancing principle to ion with kation and anion exchanging resin. The system is working with the
Principle of fi lling kation and anion resin in exchanging pole, using ion-exchange resin to exchange with calcium, magnesium and natrium ions to get high pure water. Ion-exchange resin
Is macromolecule compound, it is stable in water, acid, alkali and salt, does not melt. Resin is of large quantity exchanging, long wearable, good absorbing, small expanding, long life and etc.

These mothod can combine work with single RO system or double RO system to producing the high purity water required by different industral lines and medical feilds.
Applies for super water in electrical, chemical, hospital water, medium-high pressure
Supplementing water, resistance 2-18MΩ . Cm