Softening is a widely used technology for reducing hardness forming ions (Ca & Mg) which precipitate and scale at very low temperatures and pressures. Softening is a reversible ion exchange process where the hardness forming ions (calcium and magnesium ions) are exchanged with sodium ions present in the resin group, and thus produce soft water. At the end of each service cycle, the ion exchange resin is regenerated with sodium chloride solution, after which the units is ready for the next service cycle.