LEWATIT® CNP C

Summary

Product identification

• Product Name: Lewatit® CNP C
• Product Type: Macroporous, weakly acidic cation exchange resin
• Matrix: Crosslinked polyacrylate
• Functional group: Carboxylic acid
• Delivery form: H⁺
• Appearance: White, opaque beads

Operating limits

• pH range: 0 - 14
• Temperature range: -20 to +70 °C
• Storage temperature: -20 to +40 °C
• Storability: max. 1 year

Feed water

• Application: Decarbonisation and softening of drinking water (e.g., brewery water treatment), household filter systems.
• Note: Special care required for initial cycles when treating potable water. Recommended start-up conditions available on request. For potable water treatment in France, regeneration must use HCl or H₂SO₄ solutions, and disinfection must use H₂O₂ solutions, complying with specific purity norms (NF EN 939 for HCl, NF EN 899 for H₂SO₄, NF EN 902 for H₂O₂).

Product water

• Application: Decarbonisation and softening of drinking water and liquids used as foodstuffs or in foodstuff production.

Electrical

No information available in the extract.

Mechanical / hydraulic

• Uniformity coefficient: max. 1.8
• Effective bead size: 480 (+/- 5) microns
• Range of size for > 90% of beads: 400 - 1600 microns
• Water retention: 52 - 58 wt. %
• Total capacity: min. 4.0 eq/L (H⁺ form)
• Bulk density: approx. 770 g/L (+/- 5%)
• Density: approx. 1.17 g/mL
• Volume change (H⁺ → Na⁺): max. 64 vol. %
• Volume change (H⁺ → Ca²⁺): max. 7 vol. %
• Pressure drop: max. 250 kPa
• Specific pressure drop (at 15°C): approx. 1.3 kPa*h/m²
• Bed expansion (at 20°C, per m/h): 5 vol. %

Operation & Regeneration (Recommended)

• Operating temperature: max. 70 °C
• Operating pH-range: 5 - 14
• Bed depth: min. 800 mm

Regeneration, Counter-current

• Regenerant Type: HCl or H₂SO₄
• Regenerant Quantity: HCl approx. 70 g/L; H₂SO₄ approx. 90 g/L
• Regenerant Concentration: HCl 3 - 6 wt. %; H₂SO₄ 0.5 - 0.8 wt. %
• Linear velocity (Regeneration): approx. 5 - 20 m/h
• Linear velocity (Rinsing): approx. 5 - 20 m/h
• Rinse water requirement (slow/fast): approx. 3.5 BV

Regeneration, Co-current

• Regenerant Type: HCl or H₂SO₄
• Regenerant Quantity: HCl approx. 120 g/L; H₂SO₄ approx. 150 g/L
• Regenerant Concentration: HCl approx. 3 - 6 wt. %; H₂SO₄ approx. 0.5 - 0.8 wt. %
• Linear velocity (Backwash at 20°C): approx. 12 - 14 m/h
• Linear velocity (Rinsing): approx. 5 - 20 m/h
• Freeboard (Backwash, external/internal): 60 - 80 vol. %

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror