Clack WS3 Automatic Filter with Calcite/Corosex, 36" x 72" (w/Comm. Pot)

Systems feature the Clack WS3, 3" control valve with 9 fully adjustable cycles. Optional double backwash feature offers optimum regeneration, cleaning ability and efficiency. Systems also include Calcite/Corosex, commercial distributors, gravel bed and an 18x33 commercial potassium solution tank.

Product Features:

• 3" top mount or side mount control valve suited for commercial and industrial applications
• Lead free brass valve body
• Economical stainless steel optional meter assembly
• Service flow rate 250 gpm (946 lpm) (56.8 m3/h). Backwash flow rate 220 gpm (833 lpm) (50.0 m3/h)
• Solid state microprocessor with easy access front removable POD
• Front panel display for Time of Day, Current Flow Rate, Totalizer and Volume/Days until Regeneration
• Methods to initiate down flow regeneration; meter delayed, meter immediate, time clock delayed
• Fully programmable regeneration cycle times
• Pre or Post treated water regenerant refill
• Days override feature; 1-28 days available
• Capacitor back-up with up to 24 hour carry over
• 20-volt output AC adapter provides safe and easy installation
• Reliable and proven DC drive

Corosex®

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 flow conditions, Corosex may overcorrect and create a highly basic (high pH) condition.

Under certain hardness conditions, pH correction can cause hardness minerals to precipitate out of solution, resulting in cementing or solidification of the Corosex mineral bed. Upflow service is generally recommended with hardness exceeding five grains per gallon. (Always use an in-line filter ahead of an upflow system 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 is effectively combined with calcite to combine the high flow neutralization properties of Corosex, along with the slower reacting low flow properties of Calcite, reducing potentially high basic properties due to overcorrection.

Advantages

• High degree of activity and speed of correction allowing high flow
• High capacity...less chemical usage

Physical Properties
Color: Brownish white
Bulk Density: 75 lbs./cu. ft.
Mesh Size: 6 x 16
Specific Gravity: 3.6 gm/cc
Effective Size: 1.4 mm
Uniform Coefficient: 1.7
Composition: MgO 97% min.

Conditions for Operation

• Downflow service is generally satisfactory on waters with a hardness of less than five grains/gal. or where it’s combined with Calcite at least 50-50. Upflow service is generally recommended with hardness exceeding five grains/gal. to prevent “cementing of the Corosex bed”
• Use distributors designed for upflow applications
• A gravel support bed is recommended
• Water pH range: 4.5-6.0
• Bed depth: 24-30 in.
• Freeboard: 50% of bed depth (min.)
• Backwash frequently to prevent possible cementing
• Backwash rate: 10-12 gpm/sq. ft.
• Service flow rate: 5-6 gpm/sq. ft. but may be modified to adapt to local conditions

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 de pletes.

As the Calcite’s calcium carbonate neutralizes the water, it will increase hardness and a softener may become necessary after the neutralizing filter.

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.