Datasheet summary
DIAION WK40
PDF datasheet mirror for DIAION WK40 (Mitsubishi). Verify with OEM before design.
Summary
Product identification
- Grade Name: DIAION™ WK40L
- Type: Weak Acid Cation
- Matrix: Acrylic, Porous
- Functional Group: Carboxylic Acid
- Ionic Form: H⁺
DIAION™ WK40L is an acrylic-type weakly acidic cation exchange resin recommended for dealkalization, demineralization, and wastewater treatment.
Typical Properties
- Shipping Density: 770 g/L
- Mean Particle Size: 640 µm
- Particle Density: 1.19 g/mL
- Total Swelling (H⁺ to Na⁺): 73 %
- Water Content: 41 - 48 %
- Whole Bead Count: 95 % min.
- Total Capacity: 4.4 meq/mL min.
- Particle Size Distribution on 1180 μm: 10 % max.
- Particle Size Distribution thr. 425 μm: 3 % max.
- Effective Size: 0.45 mm min.
- Uniformity Coefficient: 1.6 max.
Recommended Operating Conditions
- Maximum Operating Temperature: 120 °C
- Operating pH Range: 4 - 14
- Minimum Bed Depth: 800 mm
- Service Flow Rate: 5 - 40 m/h
Regeneration
- Regenerant: HCl
- Regenerant Concentration: 1 - 5 % HCl
- Regenerant Level: 110 % of ionic load
- Regenerant Flow Rate: 2 - 6 m/h
- Total Rinse Requirement: 10 - 20 BV
Hydraulic Characteristics
The approximate pressure drop at various temperatures and flow rates for each meter of bed depth in normal downflow operation is shown in the graphs in the original document.
Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.