Dowex HCR-S/S is a strong acid cation exchange resin of gel type developed by Dow Chemical Corporation (USA) for application in domestic, commercial and industrial water softening systems.
The resin features high exchange capacity to provide excellent kinetic behavior. It exhibits good physical, chemical and thermal stability.
effective reduction of hardness due to high exchange capacity
high filter performance due to high filtration rate
economical water consumption for regeneration due to low bulk density
economical salt intake
stable effective operation for more than 5 years
During the water filtration through the cation exchange resin the hardness ions Ca2+ and Mg2+ are replaced by Na+ ions.
The replacement of calcium and magnesium ions by sodium ion prevents scale formation on the heating surfaces of boilers and heat exchangers. As water passes through the cation exchange resin, a number of sodium ions able to perform the exchange decreases, and a number of calcium and magnesium ions retained on the resin grows, so the cation exchange resin is being exhausted. That is why it should be regenerated by passing the solution of sodium chloride through the cation exchange layer, which will result in restoration of the resin’s exchange capability.
During the regeneration, calcium and magnesium ions are flushed into the drain, and the cation exchange resin is saturated with sodium ions from the brine solution.