Lewatit® C 249 is a premium grade, standard cross-linked, gel, strong acid cation exchange resin based on a styrene / DVB polymer. Lewatit® C 249 is especially suited for industrial water treatment applications, including demineralization, service exchange, and softening. Lewatit® C 249 can be used in single bed and mixed bed applications. Lewatit® C 249 exhibits a high ion exchange capacity combined with excellent mechanical and osmotic strength for a long operating life. Lewatit® C 249 is supplied in a heterodispersed particle size distribution as spherical beads in the fully swollen moist sodium form. Lewatit® C 249 is prepared with a minimum amount of fines (-50 mesh particles) resulting in low pressure losses during service.
Lewatit® C 249 is supplied in the sodium form. Lewatit® C 249 is also available in the hydrogen form, designated as Lewatit® C 267.
Ionic form as shipped Na+ Functional group Sulfonic acid Matrix DVB / Styrene Structure Gel Appearance Brown, translucent
Physical and Chemical Properties
metric units Uniformity Coefficient* max. 1.6 Bead size* > 90 % mm 0.4 - 1.25 Effective size mm 0.50 (+/- 0.06) Bulk density (+/- 5 %) g/l 832 Density approx. g/ml 1.26 Water retention wt. % 45 - 48 Total capacity* min. eq/l 2.0 Volume change Na+ --> H+ max. vol. % 7 Stability at pH-range 0 - 14 Stability temperature range °C 1 - 140 Storability of the product max. years 2 Storability temperature range °C -20 / 40
* Specification values subjected to continuous monitoring.
Informasi order resin kation lewatit C-249 :
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