We must ensure the DI water for the technology. For this we use RO-plant (reverse osmosis) or ion-exchanger plant (desalinating).
In the water there are salt-solutions in the form of ions. Ion exchanger materials can consolidate and modify these materials, so we can produce DI water.
In the RO-plant (water softener) the industrial water will be led through a membrane by means of high-pressure pump, so we can separate DI water from water with salt content.