Rasina dedurizare Dowex HCRS-S/S

Dupont HCR-S/S is a strongly acidic, gel-type cation exchange resin developed by Dow Chemical Corporation (USA) for various applications in domestic, commercial and industrial water softening systems. The resin has a high ion exchange capacity to deliver excellent kinetic performance. It offers good physical, chemical and thermal stability.

Major advantages of the Dupont HCR-S/S softening resin:

• effective water hardness reduction due to high ion exchange capacity.
• excellent treatment performance due to high filtration rate.
• reduced water consumption for regeneration due to low bulk density.
• economical salt consumption at each regeneration.
• efficient and stable operation for 5-8 years of use.

How is water softened with Dupont HCR-S/S resin?

During water filtration through the cation exchange resin, hardness ions Ca2+ and Mg2+ are replaced by Na+ ions. Replacing calcium and magnesium ions with sodium ions prevents the formation of limescale deposits on the heating surfaces of boilers, heaters and heat exchangers. As water passes through the cation exchange resin, the number of sodium ions available for exchange decreases, while the number of calcium and magnesium ions retained on the resin increases, until the cation exchange resin reaches saturation. Therefore, the resin must be regenerated by passing a sodium chloride solution (brine) through the cation exchange bed, which will restore the exchange capacity of the resin for another service cycle.

During regeneration, calcium and magnesium ions are flushed to drain and the cation exchange resin is recharged with sodium ions from the brine solution.

Technical operating parameters:

• Ions added during use: Na+
• Total exchange capacity, eq/L (min.): 1.9
• Moisture content (%): 48-52.
• Whole bead count % (min.): 90
• Bead density g/ml: 1.3
• Bulk weight g/L: 800

Optimal operating conditions:

• Maximum operating temperature: 120 degrees Celsius.
• pH range: 0 - 14
• Minimum resin bed depth: 800 mm
• Service/backwash flow rate: 5-50 m/h
• Regeneration/rinse flow rate: 1-10 m/h
• Total water volume for regeneration: 3-6 times the resin bed
• Regeneration: 8-12% NaCl
• Salt consumption per regeneration: 100-150 grams/liter.

* The displayed price is per bag/25 liters. The resin is packaged by the manufacturer in 25-liter bags. The weight in kg may differ.

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