Demineralized Systems In addition to the low operating costs of deionization units, which is one of the important technologies used in pure water production, there is no need for constant personnel and results are obtained in the quality of the effluent compared to other systems and this is among the key advantages. Deionizer units, which are specially designed for processes requiring high quality pure water, are used to obtain pure water as a result of purifying all remaining ions from the water after passing through the pre-treatment units. These systems, which are designed especially for well water, glass industry, dialysis centers, hot water boiler feed water, businesses that produce cosmetics, cleaning materials, and factories with a high need for pure water, are widely used today too. Fully automatic deionizer units are designed as two stages. In the first unit, cation ions in the water are kept by using cation-removing synthetics and resins in order to ensure the hydrogen cycle. Thus, H+ ions from the first unit and OH-ions from the second unit combine in order to form H2O.