As a global leader in resin technology, we develop and manufacture small beads that are used in the most regulated industries in the world to separate, remove or recover very specific elements and compounds.
With 40 years of manufacturing expertise and 30 years of regulatory experience, we supply leading separation, purification and extraction technologies to support chromatography and biocatalysis applications in healthcare and life sciences.
Macroporous polyacrylic crosslinked with divinylbenzene
Total Capacity (min.)
0.8 eq/L (17.5 Kgr/ft³) (Cl- form)
66 - 72 % (Cl- form)
Particle Size Range
300 - 1200 µm
Uniformity Coefficient (max.)
Volume Change Cl- → OH- (max.)
Shipping Weight (approx.)
680 - 730 g/L (42.5 - 45.6 lb/ft³)
80 °C (176.0 °F) (Cl- form)
During up-flow backwash, the resin bed should be expanded in volume between 50 and 70% for at least 10 to 15 minutes. This operation will free particulate matter, clear the bed of bubbles and voids, and reclassify the resin particles ensuring minimum resistance to flow. When first putting into service, approximately 30 minutes of expansion is usually sufficient to properly classify the bed. It is important to note that bed expansion increases with flow rate and decreases with influent fluid temperature. Caution must be taken to avoid loss of resin through the top of the vessel by over expansion of the bed.
Backwash Expansion of Resin Bed