Datasheet summary
LEWATIT® 249 NS
PDF datasheet mirror for LEWATIT® 249 NS (Lanxess LEWATIT). Verify with OEM before design.
Summary
Product identification
Lewatit® C 249 NS is a premium grade gel, strong acid cation exchange resin supplied in its sodium form. It is manufactured without using solvents and meets high standards for residential and municipal water treatment. Lewatit® C 249 NS is in chemical compliance with FDA 21 CFR § 173.25.
Physical and Chemical Properties
- Ionic form as shipped: Na⁺
- Matrix: DVB / Styrene
- Structure: Gel
- Appearance: Blackish brown, translucent
- Uniformity Coefficient: max. 1.6
- Effective size: 0.50 (+/- 0.06) mm
- Bulk density: 832 g/l (+/- 5 %)
- Density: approx. 1.26 g/ml
- Water retention: 45 - 49 wt. %
- Total capacity: min. 1.9 eq/l
- Stability: at pH-range 0 - 14
- Storability: max. 2 years
- Storability temperature range: -20 - +40 °C
Recommended Operating Conditions
- Operating temperature: max. 140 °C
- Operating pH-range: 0 - 14
- Bed depth: min. 800 mm
- Pressure drop (at 15 °C): max. 280 kPa
- Specific flow rate (exhaustion): max. 8 - 48 BV/h
- Linear velocity (exhaustion): max. 5 - 50 m/h
- Bed expansion (20 °C, per m/h): approx. 4 vol. %
- Freeboard (backwash): 65 - 75 vol.-% of bed depth
- Regenerant type: NaCl / KCl
- Regenerant level: approx. 64 - 320 g/l
- Regenerant concentration: approx. 8 - 13 wt. %
- Linear velocity (regeneration): approx. 1 - 10 m/h
- Linear velocity (rinse, slow / fast): 1 - 10 / 5 - 50 m/h
- Volumetric flow rate (regeneration): 4 - 12 BV/h
- Volumetric flow rate (rinse, slow / fast): approx. 2.5 - 8 / 8 - 48 BV/h
- Rinse water requirement (slow / fast): approx. 1 - 2 / 2 - 5 BV
Additional Information & Regulations
- Safety precautions: Strong oxidants, e.g. nitric acid, can cause violent reactions. Observe the safety data sheet.
- Disposal: Dispose according to European waste nomenclature within the European Community.
- Storage: Recommended to store above freezing point, under roof, dry, and out of direct sunlight. If frozen, allow to thaw gradually at ambient temperature before handling or use.
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.