Neutralizer Calcite Media & Blends
|More information on Calcite Limestone Replacement Media:|
•Naturally occurring material
•Low uniformity coefficient for
maximum contact for controlled pH
•Slower reacting for controlled pH
•Color: Near white
•Bulk Density: 90 lbs./cu. ft.
•Mesh Size: 16 x 40
•Specific Gravity: 2.7
•Effective Size: 0.4 mm
•Uniformity Coefficient: 1.5
•Hardness: 3.0 (Mohs scale)
•Composition: CaCO3, 95% min.
MgCO3, 3.0% max.
CONDITIONS FOR OPERATION
•A gravel support bed is recommended
•Water pH range we recommend for calcite only neutralizers: 6.0-7.0
•Bed depth: 24-30 in.
•Freeboard: 50% of bed depth (min.)
•Backwash rate: 8-12 gpm/sq. ft.
•Backwash Bed Expansion: 35% of
•Service flow rate: 3-6 gpm/sq. ft. but
may be modified to adapt to local
|Calcite is a crushed and screened white marble media which can inexpensively be used to neutralize acidic or low pH waters to a neutral, less corrosive effluent. |
Calcite is a naturally occurring calcium carbonate media. One of the advantages of Calcite is its self-limiting property.
When properly applied, it corrects pH only enough to reach a non-corrosive equilibrium. It does not overcorrect under normal conditions. Upon contact with Calcite, acidic waters slowly dissolve the calcium carbonate 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, reclassify the bed and maintain high service rates. Depending on pH, water chemistry and service flow, the Calcite bed will have to be periodically replenished as the Calcite is depleted.
As the Calcite’s calcium carbonate neutralizes the water, it will increase
hardness and a softener may become necessary after the neutralizing filter, however most of our customers rarely find they need a softener.
Calcite can be effectively combined with Clack Corosex to combine the high flow neutralization properties of Corosex, along with the slower reacting low flow properties of Calcite, increasing the ability to correct low pH.
|More information on Corosex pH Replacement Media:|
|By neutralizing the free carbon dioxide in water, Corosex can correct acidic water conditions and render it less corrosive. |
Corosex, being a highly reactive magnesium oxide, is used most effectively where pH correction is substantial or high flow conditions are in use.
pH correction and media consumption are affected by a number of water chemical variables. Being soluble to acidity, Corosex will slowly dissolve and will need to be replenished periodically.
On a per weight basis, magnesium oxide can neutralize much more acidity than can calcium carbonate, (five times as much). This results in greatly reduced chemical usage for the same pH correction.
Please note, under certain low flowconditions, Corosex may over-correct and create a highly basic (high pH) condition. Under certain hardness conditions, pH correction can cause hardness mineralsto precipitate out of solution, resulting in cementing or solidification of the Corosex mineral bed.
| If Corosex is used alone and not in a blend with Calcite, upflow service is generally recommended with hardness exceeding five grains per gallon. |
(Always use an in-line filter ahead of an upflow neutralizer to prevent plugging of the lower distribution screen.)
As Corosex’s magnesium oxide neutralizes the water, it will increase hardness and a softener may become necessary after the neutralizing filter.
Corosex can be effectively combined with Clack Calcite to combine the high flow neutralization properties of Corosex, along with the slower reacting lowflow properties of Calcite, reducing potentially high basic properties due to overcorrection.
We recommend Corosex to be blended with Calcite at a ratio or 90% Calcite and 10% Corosex, or 80% Calcite to 20% Corosex. Corosex works better when used with a backwashing neutralizer filter.