ProSelect™ Tannin is the choice for color, organics, and
tannin contaminated waters. It works as an organic screen, either as a
stand alone prefilter for a softener, or in some applications as a media
which is simply added to an existing softener. ProSelect™ Tannin
will sit on top of the existing softening bed to protect it and remove
organic (heme) iron as well. ProSelect™ Tannin regenerates with
salt.
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| Suggested Operating
Conditions |
| Maximum Temperature |
170ºF |
| Minimum Bed Depth |
24 inches |
Backwash Rate
50% Bed Expansion |
1.9 gpm/ft² @ 60°F |
| Regenerant** |
10% NaCl and
0.5% NaOH mixture |
| Regenerant Flow Rate |
0.25 to 0.5 gpm/ft³ |
| Regenerant Contact Time |
At least 60 minutes |
| Regenerant Level |
10 to 15
lbs/ft³ plus
proportionate amount
of NaOH |
| Displacement Rinse Rate |
Same as Regenerant
Flow Rate |
| Displacement Rinse Volume |
10 to 15 gal/ft³ |
| Fast Rinse Rate |
Same as Service Flow Rate |
| Fast Rinse Volume |
35 to 60 gal/ft³ |
| Service Flow Rate |
1 to 4 gpm/ft³ |
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| ** CAUTION: DO NOT MIX ION EXCHANGE RESINS WITH STRONG OXIDIZING AGENTS. Nitric acid and other strong oxidizing agents can cause explosive reactions when mixed with organic materials such as ion exchange resins. |
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| Physical Properties |
| Polymer Structure |
Unique porous styrene
with DVB |
| Functional Group |
R–N–(CH3)3+X– |
| Ionic Form, as shipped |
Chloride |
| Physical Form |
Tough, spherical beads |
| Screen Size Distribution |
30 to 50 nominal |
| +30 mesh (US
Std.) |
<10 percent |
| –50 mesh
(US Std.) |
<10 percent |
| –60 mesh
(US Std.) |
<1 percent |
| pH Range |
0 to 14 |
| Sphericity |
95+ percent |
| Water Retention |
60 to 75 percent |
| Solubility |
Insoluble |
Approx. Ship. Wt. |
41 lbs/ft³ |
| Swelling Cl– to OH–
Form |
32 percent |
| Total Capacity |
0.55 to 0.75 meq/ml min |
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Features:
- Complies with USDA & FDA regulations (paragraph
21 CFR173.5) for potable water applications.*
- Reversible exchange of organics
- Superior, physical stability
* For potable water applications, the resin must
be properly pre-treated, usually by multiple exhaustion and regeneration
cycles, to insure compliance with extractable levels. |
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| PRESSURE DROP — The graph above shows the expected pressure loss per foot of bed depth as a function of flow rate at various temperatures. |
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| BACKWASH — After each cycle the resin bed should be backwashed at a rate that expands the bed 50 to 75 percent. This will remove any foreign matter and reclassify the bed. The graph above shows the expansion characteristics of ProSelect™ Tannin in the chloride form. |
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Note: These suggestions and data are based on information we believe to be reliable. However, we do not make any guarantee or warranty. We caution against using these products in any unsafe manner or in violation of any patents. Further, we assume no liability for the consequences of any such actions. |
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