Specialty Resin
swtwater.com ProSelect™ Nitrate
ProSelect™ Nitrate (P/N ER20002) represents one of the newest advancements in ion exchange technology. This is one of the first resins to be preferential to nitrates over sulfates and other ions in the water. It removes and then holds onto nitrates so they aren't dumped back into the water supply. This makes ProSelect™ Nitrate the perfect choice to solve nitrate contamination problems in well water or city water applications.
Nitrate Removal from Potable Water
Remove Perchlorate in Ground Water
Chemical Processing and Resource Recovery
ER20002 Pressure Drop Graph
PRESSURE DROP — The graph above shows the expected pressure loss per foot of bed depth as a function of flow rate at various temperatures.
ER20002 Backwash Graph
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™ Nitrate in the chloride form.
The operating capacity of ProSelect™ Nitrate for nitrate removal at various regeneration levels when treating an influent with a concentration of 500 ppm, as CaCO3, is shown in the following table.
CAPACITY, Kilograins/cu.ft. as CaCO3
0% 25% 50% 75%
5 9.2 8.4 7.7 7.1
10 11.2 10.2 9.4 8.7
15 12.1 11.0 10.1 9.4
20 12.6 11.5 10.5 9.8
Above capacities above are based on the following water analysis:
                     Cl-/HCO3 = 1:1
                     NO3 = 100 ppm as CaCO3
ProSelect™ is a trademark of Safe Water Technologies, Inc.
  Highest operating capacity of any nitrate selective resin  
  Highly uniform particle size  
  Low pressure drop, superior kinetics  
  Superior physical stability  
  Low sulfate selectivity and high operating capacity  
  Certified to NSF/ANSI Standard 61  
Part Number ER20002
Polymer Structure Styrene with DVB
Functional Group R-N-R3+Cl-
Ionic Form (as shipped) Chloride
Physical Form Tough spherical beads
Screen Size Distribution
  + 16 mesh (US Std.)
  – 40 mesh (US Std.)
  – 50 mesh (US Std.)
5% maximum
2% maximum
1% maximum
pH Range 0 to 14
Water Retention 52 to 60%
Solubility Insoluble
Approx. Ship. Wt. 42 lb/cu.ft.
Swelling Cl- to OH- Form Approx. 12%
Total Capacity 0.85 meq/mL min.
Maximum Temperature 170°F (77°C)
Minimum Bed Depth 24 inches
Backwash Rate
  50% Bed Exp. @60°F
(See graph left)
  1.8 gpm/sq.ft.
Regenerant Concentration* 2%
Regenerant Flow Rate 0.25 to 1.0 gpm/cu.ft.
Regenerant Contact Time 30 minutes minimum
Regenerant Level 2 to 15 lb/cu.ft.
Displacement Rinse Rate 0.25 to 1.0 gpm/cu.ft.
Displacement Rinse Volume 10 to 15 gal/cu.ft.
Fast Rinse Rate 2 to 4 gpm/cu.ft.
Fast Rinse Volume 35 to 60 gal/cu.ft.
Service Flow Rate 2 to 4 gpm/cu.ft.
Pressure Drop (See graph left)
* 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.
SWT Ion Exchange Resin Guide
This information has been gathered from standard materials and or test data that is believed to be accurate and reliable. Nothing herein shall be determined to be a warranty or representation expressed or implied with respect to the use of such information or the use of the goods described for any particular purpose alone or in combination with other goods or processes, or that their use does not conflict with existing patent rights. No license is granted to practice any patented invention. It is solely for your consideration, investigation and verification.
Safe Water Technologies, Inc.
996 Bluff City Boulevard
Elgin, IL 60120 USA
Telephone: +1.847.888.6900
Facsimile: +1.847.888.6924
E-mail: info@swtwater.com

Last Updated: December 15, 2021