Soften means remove the water hardness due to salts of calcium and
magnesium, exchanging them with Sodium salts, which do not falling and
do not encrusting. To obtain the exchange the water is passed through a
bed of resins, previously loaded with sodium, using as tonic the sodium
chloride (common table salt). Culligan, STA’s technology partner, uses
specific exchange resins, suitable for contact with food products, which
are characterized by high wear resistance, long life, high exchange
capacity and low power consumption of salt. For the regeneration it can
also be used the Potassium chloride.