Softening Water Principle: When the original water has high levels of calcium and magnesium ions, the ion exchange resin (a polymer with corresponding functional genes, where sodium ion exchange resin contains a large amount of sodium ions) can release sodium ions, which bind with the calcium and magnesium ions, thereby reducing their content in the water, decreasing water hardness, and transforming hard water into soft water. Water hardness is mainly composed of positive ions: calcium (Ca2+) and magnesium (Mg2+) ions. As the hard water passes through the resin layer of the exchange unit, the calcium and magnesium ions in the water are adsorbed by the resin, while sodium ions are released. Thus, the water exiting the exchange unit is softened by removing the hardness ions. When the resin adsorbs calcium and magnesium ions to a certain saturation point, the hardness of the output water increases. At this point, the water softener will automatically regenerate the exhausted resin according to a predetermined program, using a high-concentration sodium chloride solution (brine) to restore the exhausted resin to sodium form. Equipment Models: 0.5 tons/hour – 1000 tons/hour. Equipment Selection Considerations: Consider the peak production water demand, the original water hardness, and whether the equipment operates for more than 8 hours per day. Equipment Purchase Considerations: Resin brand, exchange capacity, regeneration control method, and whether equipment above 30 tons has the brine immersion function.