Initially, strong acid cation resin in the sodium (Na+) form is placed into service. During the sodium cation exchange water softening process, sodium ions are exchanged for undesireable quantities of calcium (Ca++), magnesium (Mg++), and iron (Fe++). Sodium ions already present in the water being softened pass through the process unchanged. Upon exhaustion of the resin (as indicated by unacceptable hardness leakage), a regeneration sequence involving sodium chloride (NaCl) is utilized.
The regeneration sequence reverses the above process and converts the strong acid cation resin back to the sodium form for the subsequent water softening cycle.
Capacities range from 20,000 to 30,000 grains per cubic foot depending upon the total dissoved solids content of the water, the effluent water quality desired, and the amount of sodium chloride regenerant used. It should be noted that although the water is softened, the total dissoved solids content remain unchanged. Further, the effluent contains the same amount of anions as the raw water.
- Single Tank, Twin Tank or Multiple Tank Softeners
- Metered or Timed Softeners
- 20,000 grains - 1,000,000 grains
- Custom for different applications
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