Softening is the removal of hardness from water. Removal is obtained through the exchange of calcium and magnesium ions with sodium, which do not form deposits or scale. Raw water is passed through a layer of resin previously loaded with sodium, using sodium chloride (salt), Sendi use reputed brand food grade exchange resin which is highly resistant to mechanical wear, long lasting, and salt-efficient. Potassium Chloride can also be used for resin regeneration, for suitable applications.

Deionization is a physical process for the elimination of ions from the process liquid by using resin (polymeric materials). The resin has special features to remove ions from process liquid by absorption (electrical charges). The absorbed ion is replaced by another ion which is temporarily connected to the resin. The idea is to replace any ion in the water by a known ion in the resin. This process is called ion – exchange. This advanced technology is able to exchange selective ions in water.

The ion exchange process produces very high-quality water. The resin is consumed over time and it is to be replaced with new resin or special resin, which is intended for regeneration by chemicals for the next session.

The most common use of this technology is for deionized water and removing selective ions from the liquid.