The working principle of the softener is to use the exchange of groups in the ion exchange resin to replace and remove the hardness components in the water body such as Ca2+, Mg2+ plasma, so as to achieve the purpose of softening the hard water and reduce the damage caused by scale in the subsequent pipelines and equipment. Extend the life of the equipment. The water hardness after treatment by JPYSF single-stage or multi-stage softener is ≤0.02mmol/L. When the softener fails, it needs to be regenerated with sodium chloride, which is extremely convenient to operate.