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Water Softening Salt

The uses of salt

Salt for Water Softening

The salt (Sodium Chloride - NaCl) is largely used in the process of regenerating synthetic resins in water softening. SA-MA has selected the best products from the most qualified European producers: sea salt, rock salt and evaporated salt in many different sizes, compacted and tablets. All products are supplied with specifications, analyses and certifications. The result meets all the requirements: from domestic use to industrial use.

The quality of salt

For a good regeneration of the resins, is extremely important the use of specific quality of salts. The salt will guarantee the efficiency of the softeners, avoiding product waste and premature wear and tear of the resins; in addition to which there are considerable savings in operating costs for both ordinary and extraordinary maintenance.

What is "hard water"

The presence of Calcium and Magnesium ions in water is called "hardness". A high level of hardness in water (hard water) causes deposits of limescale reducing the efficiency of the pipes and all the machineries, devices and implants that are connected to the water.

The water softening

The process of elimination of the hardness of the water is technically called "softening" (often and incorrectly referred to as "depuration"). There are many ways to soften the water; among the most used are:

  • the method of Ionic Exchange
  • the Chemical method
  • the method of the Active Carbonic
  • the Electrolytic method
  • the Pressure method.

One of the most utilised is the Ionic Exchange method that using special substances is able to replace its own ions with the ions on the water. Porous spheres of very small dimensions called Synthetic resins are commonly used as ions exchangers and placed in special tanks.

In the hard water, ions of Calcium and Magnesium get stick to the resins when there is a contact between them and the water. The porous sphere that contains ions of Sodium begins to move in order to replace its ions to the ions of Calcium and Magnesium causing them to be eliminated from the water.

With time the resins become weaker and so the necessity of revitalize the porous spheres through the "regeneration" process. This process simply consists of washing the resins with saturated solution of salt. (Sodium Chloride).