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Last change 10/2018 E-P | Subject to technical modifications
1.2 Function
System HYDRO
ION
®
VAS exclusively suited to soften hard water having drinking water
characteristics.
That means the water must be clear, colourless, free from chlorine, iron, manganese and oil in order
to avoid a damage of the exchange material by blocking.
The feature of hard water is substantial for the efficiency of the ion exchange material and the
operation of the system.
The ambient temperature for the system must be free from frost and not exceed 40°C since
otherwise the ion exchange resin will be irreversibly damaged and/or the pressure resistance of
used materials is reduced.
The HYDRO
ION
®
VAS water softener is controlled by a water meter.
The softening of the water is by means of the ion exchange resin in the pressure vessel. The
process of ion exchange is the exchange of the hard minerals (calcium and magnesium ions) with
sodium ions. Water treated in this manner is called softened water.
The ion-exchange resin becomes exhausted after a certain water volume has passed and at this
point it must be regeneration with sodium chloride (common salt).
Operation / regeneration of the softener in the different stages in accordance with the following
processes:
Operation = soft water production
The water to be treated passes through the iron exchange resin bed from top to bottom and goes to
service as soft water via a riser tube.
Backwash
Water passes through the ion exchange resin bed from bottom to top, to fluidise and aerate the bed.
The back wash is sent to drain.
Brining / slow rinse
Brine is drawn by means of an injector, diluted, and fed through the ion exchange resin from top to
bottom. Whilst the process is taking place, the calcium and magnesium ions attached to the resin
are exchanged for sodium ions, thus regenerating it. Effluent goes to drain.
