2025 Nelsen Corporation Catalog - Catalog - Page 118
4 Calcite, Soda Ash
Resins, Media & Chemicals
Calcite
Acidic waters on contact with Calcite slowly dissolve the calcium
carbonate media to raise the pH which reduces the potential
leaching of copper, lead and other metals found in typical plumbing
systems. Periodic backwashing will prevent packing and maintain
high service rates. Depending on pH and service flow, the
Calcite bed will have to be periodically added to as the dissolved
Calcite depletes.
As the Calcite’s calcium carbonate neutralizes the water, it will
increase hardness and a softener may become necessary after the
neutralizing filter.
Certified to
NSF/ANSI 60
Advantages:
• High uniformity coefficient for maximum contact
for controlled pH correction
• Slower reacting
• Inexpensive
Physical Properties:
Color ..................................................................................... Near White
Density ............................................................................ 100 lbs./cu. ft.
Composition ....................................................... CaCO3, 95% minimum
..........................................................................MgCO3, 3.0% maximum
Conditions for Operation:
pH ....................................................................................................5 - 6
Bed Depth ..............................................................................24 - 30 in.
Backwash Rate............................................................. 8-12 gpm. sq. ft.
Backwash Bed Expansion ......................................... 35% of bed depth
Service Flow Rate .................................3 -6 gpm/sq. ft. invariably give
.............................................................. satisfactory results but may be
......................................................modified in view of local conditions.
Calcite (for Acid Neutralization)
Pallet quantity - 56 bags per pallet
CAL-50-BAG
1/2 Cubic Foot Bag (50 lb.)
CAL-50-BOX
1/2 Cubic Foot Box
Soda Ash
Soda Ash injection is used if water is acidic (low pH). Soda Ash
(sodium carbonate) raises the pH of water to near neutral when
injected into a water system. Unlike neutralizing filters, they do not
cause hardness problems in treated water. A corrosion-resistant
chemical feed pump should be used to inject a Soda Ash solution
into the water.
If the water needs to be disinfected as well as neutralized,
dual treatment is possible within the injection system by
adding a chlorine solution (sodium hypochlorite) along with the
neutralizing chemical.
Certified to
Soda Ash can treat water with a
NSF/ANSI 60
pH as low as 4.
The solubility of Soda Ash is dependent on temperature. The
following chart shows how much will stay in solution without
forming a precipitate in the solution tank, injector line and
chemical feed pump.
32ºF
0.58
Solubility of Soda Ash (Na2C03)
Pounds Per Gallon
50ºF
68ºF
1.04
1.79
86ºF
3.23
About 3 pounds of Soda Ash to 4 or 5 gallons of water is the
strongest solution that should be attempted. Soda Ash has a
tendency to stop up feeder lines and check valves associated
with the chemical feed pump. Problems can be minimized by
keeping the solution mixture as weak as possible to get the pH
adjustment needed.
Soda Ash (for Acid Neutralization)
When injected into a water system with a chemical feed pump, Soda Ash will neutralize acid water and
eliminate corrosion problems. Also used as a cleaner for Tannin type water softeners.
ASH50
50 lb. Bag
ASH50-100-BOX
50 lb. Box
4 - 16
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All prices and products subject to change without notice. ©Nelsen Corporation
