Ion exchangers: Water softening units use strongly acidic ion-exchange resin to replace hardness components (calcium and magnesium ions) with sodium ions. Instead of deposit-forming calcium hydrogencarbonate more soluble sodium salts like sodium hydrogencarbonate are produced. The hardness components are thus almost completely removed from the water; the residual hardness is less than 0.07 ppm.
Regeneration: As soon as the resin becomes depleted, it is regenerated with sodium chloride; the calcium and magnesium ions attached to the resin are replaced by sodium ions again. Since, during regeneration, simplex units only supply raw water to the consumer, duplex units are the right choice if permanent soft water supply is required.
Water softening is only an exchange of ions; the salt concentration in the water hardly changes.
Time-controlled softening units are generally designed as simplex models. Regeneration takes place at a defined time, when no soft water is needed.
Volume-controlled softening units make best use of the resin capacity. A water meter registers the soft water amounts drawn and emits pulses to a controller. As soon as a predefined soft water amount has been consumed, regeneration is triggered automatically.
Quality controlled softening units offer optimum operational safety since they work independently from water quality and soft water consumption. The chemical state of the ion-exchange resin is monitored permanently and regeneration is initiated upon resin depletion.
Our water treatment experts will gladly consult you and help with the layout of your installation.