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Porous type DIAION™ PK Series

The PK resin grades are based on a porous styrene DVB polymer matrix. Their porous structure provides excellent durability against osmotic shock by swelling and shrinkage. PK216 is recommended for general water treatment. PK228 is recommended for condensate demineralization (L grade is recommended for best pressure-flow performance). PK grades are also recommended for special applications such as de-ashing, decolorization, and as a catalyst (as they have a higher reaction rate in organic solvents than gel-type resins).

Grade Name DIAIONTM
PK208
DIAIONTM
PK212L
DIAIONTM
PK216
DIAIONTM
PK220
DIAIONTM
PK228
DIAIONTM
RCP160M
Chemical Structure
Ionic Form As Shipped Na-form H-form
Whole Bead Count 95 min.
Shipping Density
(g/L: approx.)
765 780 785 795 810 745
Salt Spliting Capacity
(meq/mL-R)
1.2 min. 1.5 min. 1.75 min. 1.9 min. 2.05 min. 1.5 min.
Water Content
(%)
58 – 68 52 – 58 46 – 52 41 – 47 37 – 43 45 – 55
Particle Size Distribution
on 1180 μm (%)
through 425 μm (%)
through 300 μm (%)
5 max.

1 max.
5 max.
1 max.
5 max.

1 max.
on 710 μm
25% max
Effective Size (mm) 0.40 min. 0.45 min 0.40 min.
Uniformity Coefficient 1.6 max.
Ionic Form Conversion H Form 97 min.
Operating Temperature (℃) 120 (H-form, Na-form) max.
Crosslinkage (%) Ca. 4 Ca. 6 Ca. 8 Ca. 10 Ca. 14
Clear
Additional Information
Product

DIAION™ PK208, DIAION™ PK212L, DIAION™ PK216, DIAION™ PK220, DIAION™ PK228

Packaging

25 L bag, 1 cubic ft bag, 7 cubic ft bag, 200 L drum