Purpose:
Removal of hardness salts from water with simultaneous effective removal of iron compounds. Thanks to special ion-exchange resins, such filters are able to remove iron (at its concentration in the source water up to 2 mg / l and even up to 4 mg / l.

Areas of use:
Enterprises of food, metallurgical, petrochemical, pharmaceutical, perfumery and other industries, boiler houses and other objects of housing and communal services, preparation of water for reverse osmosis treatment.

Filter material:
Fine-grained ion-exchange resin (cation resin), resistant to sticking with oxidized iron.
Batch and continuous ion exchange water softeners.

Job management:
automatic:
using an electromechanical or electronic control mechanism for the volume of treated water (meter) or at regular intervals (timer);
manual:
using a mechanical control mechanism by the volume of treated water or at certain intervals (determined by the operator).

System complete set:
  • filter column (material - glass fiber reinforced with food-grade interior, no seams)
  • loading (filter material, gravel)
  • distribution system
  • control mechanism
  • salt tank

Operating principle:
Removal of hardness salts and dissolved iron from water takes place in pressure filter columns.

The process of water softening is an ion-exchange process that leads to a decrease in its hardness (a decrease in the concentration of calcium ions Ca + 2 and magnesium Mg + 2 in water).

During the operation of the system, the exchange capacity of the cation exchanger decreases. To restore the ion-exchange capacity of the spent cation exchanger, automatic or manual regeneration is carried out using a salt solution (NaCl).

Regeneration mode (restoration of exchange capacity) includes five stages:
  • backwash (backwash),
  • passing the saline solution through the cation exchanger (brine draw),
  • slow rinse (slow rinse),
  • fast rinse (rapid rinse),
  • filling the brine tank with water (brine tank refill).

The wash water is discharged into the sewer during the regeneration process. After the completion of the regeneration, the system is put into operating mode (filtration mode).
Service flow - depending on the technical task.

Execution options:
Mn - manually controlled regeneration
T - automatic (timer) regeneration control
M - automatic (counter) regeneration control
EM - automatic (electronic counter and timer) regeneration control
NBP - built-in valve to prevent dirty water from entering the consumer during system regeneration

DFlow - system with direct-flow regeneration - basic version: salt supply to the system during regeneration is carried out from top to bottom, the volume of cation exchanger is 65-70% of the column volume

UpFlow - a system with counterflow regeneration: the salt is fed into the system during regeneration from the bottom up, the volume of the cation exchanger is 95-98% of the column volume

Guaranteed water quality after treatment with the KWS / KFS series system:
total hardness - no more than 0.2 mEq / l (in UpFlow systems - no more than 0.05 mEq / l);
total iron - no more than 0.3 mg / l

Basic requirements for the quality of source water:
  • lack of microbiological contamination;
  • the presence of hydrogen sulfide (H2S) in the source water is unacceptable;
  • the maximum concentration of iron (Fe) in the treated water is 4 mg / l (for UpFlow systems - 0.5 mg / l);
  • treated water temperature - up to 38 ° С;
  • maximum size of solid particles - no more than 50 microns

Basic conditions for using filters:
  • working pressure - from 2.1 to 8.6 atm.
  • electrical parameters of the control mechanism - 220 V, 50 Hz, 25 W.
  • indoor air temperature 5 - 35 ° С, humidity - no more than 70%;
  • the presence of a drainage system.