Salt for efficient water softening
The efficiency of water-softening installations depends largely on the quality of the salt used. The fact is that compacted salt is necessary to produce a brine solution for regenerating the ion exchange, which forms the heart of the softener.
A good regeneration salt dissolves evenly and gradually - to supply just enough salt as needed - but never disintegrates.
Regenerating salt...
In time, however, the sodium stored in the ion-exchange beads becomes exhausted. Therefore the beads must be periodically regenerated, i.e. refilled with sodium ions and freed from the accumulated calcium and magnesium ions. This is done by washing the beads in a concentrated solution of sodium chloride. Usually the necessary brine solution is prepared automatically in a separate storage tank in which a compacted regeneration salt - in the form of sodium chloride tablets or granules - slowly dissolves.
Very pure vacuum salt...
First of all, a good regeneration salt contains no harmful soluble, insoluble or micro-biological contaminants.
Residual insoluble substances can plug delicate parts of your water softener, such as valves, or form a layer of sediment in the brine storage tank. Soluble contaminants on the other hand, form a threat to the effectiveness of the ion-exchange resin and the quality of the softened water.
Compacted under high pressure...
Secondly, the regeneration salt should dissolve evenly and gradually, releasing sodium chloride cycle after cycle, up till the end. Many cushions, nuggets and other forms of regeneration salt, however, are compacted under low pressure. They therefore tend to disintegrate prematurely. Disintegration - technically referred to as ’mushing’ - may cause sedimentation and caking in the storage tank or other parts of the system.
Made-to-measure for every application...
A complete product line of various grain sizes has been developed to meet precisely the process and equipment requirements in each individual case. From granules and tablets for, e.g., dental practices and hairdressers, to special blocks for compact water-softening systems.
Understanding the information
Timer/metered control
The frequency of regeneration can be controlled either by a timing programmer or metering system that will only initiate a regeneration when the capacity of the softener is exhausted.
Resin volume/vessel
The amount of resin will determine the amount of softened water the unit can produce between each regeneration.
Capacity
This figure is normally calculated at a nominal hardness of 21°C/°Clark or 300 ppm. Care should be taken here when comparing products.
Salt per regeneration
The amount of salt used per regeneration.
Waste water
The amount of water used on each regeneration. Note that the larger the capacity the more water will be used.
