DI Tank User Guide

What happens when water flows through a DI tank?

The deionization process begins as water flows into the DI tank, where a distribution screen ensures uniform dispersion across the ion exchange resin bed. While passing through the resin beads, the water undergoes ion exchange, effectively removing mineral ions. A precision filter screen at the tank's base permits only purified water to exit while retaining the resin beads.

The resin's capacity diminishes with use until eventual exhaustion, indicated by monitoring electrical conductivity (which reflects mineral content) or other user-defined parameters. Importantly, ion exchange remains chemically reversible - through regeneration processes involving specialized chemical treatment, thorough cleaning, and rinsing cycles that restore the resin's functionality for reuse.

While effective for demineralization, this technology has limitations: it cannot eliminate microorganisms, organic compounds, or particulate matter. Therefore, we recommend complementary technologies like granular activated carbon (GAC) filtration, reverse osmosis (RO), or ultraviolet (UV) disinfection to achieve comprehensive water purification tailored to specific application requirements.

Are DI tanks able to remove all the contaminants in water?

While DI (deionization) tanks excel at eliminating dissolved mineral content from water, their purification capabilities have specific limitations. These systems demonstrate minimal effectiveness against organic compounds, bacterial contaminants, and pathogenic microorganisms. Although the resin beads can incidentally capture certain particulate matter through physical entrapment, this process actually compromises the system's primary function of mineral removal by occupying resin exchange sites.

What is the difference between a mixed bed and a softener?

Water softeners specifically target hardness minerals like calcium and magnesium, substituting them with sodium ions to prevent scale formation. While this ion exchange process maintains or even elevates water conductivity due to sodium's high conductivity, mixed bed systems operate differently by eliminating virtually all dissolved solids, thereby dramatically reducing conductivity to minimal levels.