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ALFASOFT

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Ion-exchange resin

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Medium volume, liters Medium quantity, bags

Purpose

A filter material intended for removing the water-soluble hardness ions, calcium and magnesium cations that degrade water quality, increase its hardness and cause scale buildup.

It is intended for drinking and household water treatment.

Description

This filter material is a mono-dispersed ion-exchange resin (cationite) in the Na+ form, having gel structure with styrene-divinyl benzene matrix and strongly acidic functional groups (sulphogroups). It has a high level of chemical and osmotic stability. Special production technology ensures very low content of mineral and organic impurities.

Equivalents

The equivalents are such cation exchange resins as Purolite PPC 100 E, Lewatit S 1567 or Amberlite FPC 16 Na. Other polydisperse equivalents include Purolite C 100 E and Lewatit C 249 NS.

Specifications

  • Beads diameter (monosphere) 0.550 ± 0.05 mm
  • Uniformity coefficient max. 1.1
  • Moisture content 43 – 53 %
  • Osmotic stability min. 96 %
  • Full static exchange capacity min. 2,1 mmol/см3 (mg-eq./cm3)
  • Bulk weight 0,80 – 0,85 g/cm3
  • True density 1,25 – 1,29 g/cm3
  • Package 25 l
  • Working water flow 8-40 resin volumes/h

The requirements for raw water

pH range pH 0 – 14
Temperature from 5 to 120 °С
Total hardness up to 20 meq/l
Total iron up to 0.3 mg/l
Total manganese up to 0.1 mg/l
Turbidity, clay, loam none
Permanganate index up to 5 mg/l
Hydrogen sulphide none
Sulphides (by H2S) none
Free chlorine concentration up to 0.5 mg/l
Carbon oxide CO none
Oil products none
Colloidal silicic acid none

Recommendations for use

The medium is used in pressure bed filters for purification of household water.

Service life of the medium is up to 5 years.

Commissioning and operation

After loading Alfa Soft into the tank, it should be washed with untreated water in the amount of five volumes of resin (e.g. 25 l of resin is required for 0844 casing, consequently, the washing water volume should be 25*5 = 125 l). The regeneration is carried out with the sodium chloride solution and may be both direct-flow and back-flow.

The formula for approximate calculation of the filtration cycle:

V = (2 * VAS) / G

V - filtration cycle, m3

VAS - volume of Alfa Soft, l

G - total hardness of untreated water, meq/l

*The formula provides an approximate indication of the actual filtration cycle. The most optimal is the experimental selection of the period between regenerations and washing time, which enables using the water treatment system at minimal consumption of regenerate and washing water.

Washing is required at least once every 14 days.

Standard working conditions for direct-flow regeneration

Stage Instructions Duration or quantity of water
Backwash To be performed at the minimum temperature with the bed expansion of 50-80% 1 free volume for pure water supply or 2-3 free volumes if mechanical impurities are present
Bed precipitation Wait until the bed is completely formed 3-8 minutes
NaCl supply 50-250 g/l should be applied as 10% brine, supplying 2-4 volumes of resin/h Usually, 20-45 minutes depending on the concentration and flow
Slow washing Water in a quantity of 1-3 resin volumes with the supply being approximately equal to regenerate supply Usually, 20-45 minutes depending on the water volume and flow
Final washing Water in a quantity of 3-6 resin volumes preferably at the working flow or > 15 resin volumes per hour Usually, 5-10 minutes

Standard working conditions for back flow regeneration

Stage Instructions Duration or quantity of water
NaCl supply 50-150 g/l should be applied as 10% brine, supplying 24 volumes of resin per hour Usually, 20-45 minutes depending on the concentration and flow
Slow washing Water in a quantity of 1-2 resin volumes with the supply being approximately equal to that of the regenerate Usually, 20-45 minutes depending on the water volume and flow
Final washing Water in a quantity of 2-4 resin volumes preferably at the working flow or > 15 resin volumes per hour Usually, 5-10 minutes

Package

AlfaSoft is packaged in convenient 25 l bags ± 20 kg, 40 bags per pallet

Specifications

  • Beads diameter (monosphere) 0.550 ± 0.05 mm
  • Uniformity coefficient max. 1.1
  • Moisture content 43 – 53 %
  • Osmotic stability min. 96 %
  • Full static exchange capacity min. 2,1 mmol/см3 (mg-eq./cm3)
  • Bulk weight 0,80 – 0,85 g/cm3
  • True density 1,25 – 1,29 g/cm3
  • Package 25 l
  • Working water flow 8-40 resin volumes/h