Description
Cation 220 Na is a high-capacity strong acid cation exchange resin supplied as moist beads in the sodium form. The resin has a cross-linked styrene-divinylbenzene gel matrix with sulphonic acid functional groups.
Its principal application is water softening, where hardness-forming calcium and magnesium ions are exchanged for sodium ions. The published INDION 220 Na data sheet also identifies use as a cation exchanger in the hydrogen cycle for two-stage deionisation.
Key Benefits
- Strong acid cation exchange resin in sodium form
- Designed primarily for water-softening applications
- High total exchange capacity: minimum 1.8 meq/ml
- Controlled 0.3–1.2 mm bead-size range
- Effective size: 0.45–0.55 mm
- Wide operating pH range: 0–14
- Suitable for domestic, commercial and industrial softening systems subject to system design
- Regenerable resin for repeated service cycles
How It Works
During sodium-cycle softening, the resin exchanges sodium ions for hardness-forming cations such as calcium and magnesium. As the resin becomes exhausted, it is regenerated using a sodium-chloride brine solution so that the resin can return to the sodium form for another service cycle.
Suggested developer visual: a simple 3-step graphic — HARD WATER (Ca²⁺ / Mg²⁺) → CATION RESIN BED → SOFTENED WATER — followed by a regeneration arrow using BRINE (NaCl).
Regeneration
- Regenerant for normal sodium-cycle softening: sodium chloride (NaCl) brine
- Actual salt dosage and brine concentration depend on the softener design, desired operating capacity and regeneration method
- Backwash, brining, slow rinse and fast rinse settings should follow the softener manufacturer / system design
- Do not publish a universal regeneration dosage unless Starke approves a design basis for the specific system
NEED HELP SELECTING A SIZE?
Download Datasheet
Cation 220 Na Ion Exchange Resin – Technical Datasheet (PDF)
DOWNLOAD DATASHEET
Bulk Orders
Need Cation Resin for a Water Softener or Industrial Plant?
- Water-softener initial filling
- Replacement of exhausted / old resin
- Commercial and industrial softeners
- OEM and water-treatment dealer requirements
- Multiple 25 L / 50 L bags
- Palletised and recurring supply
- Project-specific resin quantities
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