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Clack Greensand Filtration Media

Quality parts at an exceptional value
Product Description

The manganese dioxide coated surface of GreensandPlus acts as a catalyst in the oxidation reduction reaction of iron and manganese. The silica sand core of GreensandPlus allows it to withstand waters that are low in silica, TDS and hardness without breakdown. GreensandPlus is effective at higher operating temperatures and higher differential pressures than standard manganese greensand. Tolerance to higher differential pressure can provide for longer run times between backwashes and a greater margin of safety.

Systems may be designed using either vertical or horizontal pressure filters, as well as gravity filters. GreensandPlus is a proven technology for iron, manganese, hydrogen sulfide, arsenic and radium removal. Unlike other media, there is no need for extensive preconditioning of filter media or lengthy startup periods during which required water quality may not be met. GreensandPlus is an exact replacement for manganese greensand. It can be used in CO or IR applications and requires no changes in backwash rate or times or chemical feeds. GreensandPlus has the WQA Gold Seal Certification for compliance with NSF/ANSI 61. Packaging is available in 1/2 cubic foot bags or 1 metric ton (2,205 lbs) bulk sacks.

[custom-specifications]
Clack Greensand Filtration Media - Physical Characteristics:
  • Physical Form: Black, nodular granules shipped in a dry form
  • Apparent Density: 88 pounds per cubic foot net
  • Shipping Weight: 90 pounds per cubic foot gross
  • Specific Gravity: Approximately 2.4
  • Porosity: Approximately 0.45
  • Screen Grading (dry): 18 X 60 mesh
  • Effective Size: 0.30 to 0.35 mm
  • Uniformity Coefficient: Less than 1.60
  • pH Range: 6.2-8.5 (see General Notes)
  • Maximum Temperature: No limit
  • Backwash Rate: Minimum 12 gpm/sq. ft. at 55ºF (see expansion chart)
  • Service Flow Rate: 2 – 12 gpm/sq. ft.
  • Minimum Bed Depth: 15 inches of each media for dual media beds or 30 inches of GreensandPlus alone.
    [/custom-specifications]
[custom-features]
Suggested Operating Conditions:
Bed Type Dual media: anthracite 15-18 in. and GreensandPlus 15-24 in.
Capacity 700-1200 grains of oxidized iron and manganese/sq.ft. of bed area based on oxidant demand and operation to iron break through or dp limitations.
Backwash Sufficient rate using treated water to produce 40% bed expansion for 8 minutes or until waste water is clear.
Air/Water Scour Optional using 0.8-2.0 cfm/sq. ft. with a simultaneous treated water backwash at 4.0-4.5 gpm/sq. ft.
Raw Water Rinse At normal service flow rate for 3 minutes or until effluent is acceptable.
Flow Rate Recommended flow rates with CO operation are 2-12 gpm/sq. ft. Extremely high concentrations of iron and manganese usually require lower flow rates for equivalent run lengths. Higher flow rates can be considered with very low concentrations of iron and manganese. For optimizing design parameters, pilot plant testing is recommended.The run length between backwashes can be estimated as follows:

Contaminant loading
= (1 x mg/L Fe) + (2 x mg/L Mn)
= (1 x 1.7) + (2 x 0.3)
= (2.3 mg/L or 2.3/17.1 = 0.13 grains/gal. (gpg)
At 1,200 grains / sq. ft. loading ÷ 0.13 gpg = 9,230 gal./sq. ft.
At 4 gpm / sq. ft. service rate 9,230/4 = 2,307 min.
The backwash frequency is approximately every 32-38 hours of actual operation.
[/custom-features]
[custom-usage]
  • Iron and Manganese Removal
  • Hydrogen Sulfide Removal
  • Arsenic Removal
  • Radium Removal
[/custom-usage]
[custom-documents] [/custom-documents]
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  • 5
    Fast shipping

    Posted by Enaseoj N. on Jul 8th 2019

    Very good price

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