Dowex Marathon C

Summary

Product identification

• Product Name: DOWEX™ MARATHON™ C
• Product Type: Strong acid cation
• Matrix: Styrene-DVB, gel
• Functional group: Sulfonic acid

DOWEX™ MARATHON™ C is a uniform particle size resin designed for industrial and residential softening and demineralization applications.

Guaranteed Sales Specifications

Na⁺ form

• Total exchange capacity, min.: 2.0 eq/L (43.7 kgr/ft³ as CaCO₃)
• Water content: 42 - 48 %
• Uniformity coefficient, max.: 1.1

H⁺ form

• Total exchange capacity, min.: 1.8 eq/L (39.3 kgr/ft³ as CaCO₃)
• Water content: 50 - 56 %
• Uniformity coefficient, max.: 1.1

Typical Physical and Chemical Properties

Na⁺ form

• Mean particle size†: 585 ± 50 μm
• Whole uncracked beads: 95 - 100 %
• Total swelling (Na⁺ → H⁺): 8 %
• Particle density: 1.28 g/mL
• Shipping weight: 820 g/L (51 lbs/ft³)

H⁺ form

• Mean particle size†: 600 ± 50 μm
• Whole uncracked beads: 95 - 100 %
• Total swelling (Na⁺ → H⁺): 8 %
• Particle density: 1.20 g/mL
• Shipping weight: 800 g/L (50 lbs/ft³)

† For additional particle size information, please refer to Particle Size Distribution Cross Reference Chart (Form No. 177-01775).

Recommended Operating Conditions

• Maximum operating temperature: 120°C (250°F)
• pH range: 0 - 14
• Bed depth, min.: 800 mm (2.6 ft)
• Flow rates:
  • Service/fast rinse: 5 - 60 m/h (2 - 24 gpm/ft²)
  • Backwash: see figure 1
  • Co-current regeneration/displacement rinse: 1 - 10 m/h (0.4 - 4 gpm/ft²)
  • Counter-current regeneration/displacement rinse: 2 - 5 m/h (2 - 8 gpm/ft²)
• Total rinse requirement: 2 - 5 Bed volumes
• Regenerant: 1 - 8% H₂SO₄, 4 - 8% HCl or 8 - 12% NaCl

Packaging

• 25 liter bags or 5 cubic feet fiber drums

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