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Highly spherical shape and uniform grading provide Clack Filter Sand and Gravel with
reliable performance. Low soluable impurities limits undesirable mineral leaching into the
process stream.
Filter Sand and Gravel
Clack Filter Sand and Gravel are naturally
occurring, river washed, glacial deposit products. Their excellent chemical properties -
high in silica content and low in soluable calcium, magnesium and iron compounds - meet
AWWA-B100-96 specifications. Precision sizing and uniform grading to close limits meet the
rigid specifications of professional engineers throughout the world.
For over 80 years Clack Filter Sand and Gravel
have been satisfying the requirements of industrial, municipal and residential users.
These products have been specified and used nationally and internationally because of
their high quality, desirable chemical properties, color, and wide range of precision
sizing.
Processing and regular analysis of production
are supervised by registered professional engineers.
Clack Filter Sand is graded
specifically for water filtration plants. It can be used in municipal, industrial or
residential applications for sediment filtration.
Clack uncrushed Gravel has a highly spherical shape that promotes good
flow and even distribution in support beds. Gravel is low in soluable impurities and it
will maintain the quality of the treated water, especially in softeners. Three inch layers
are recommended in graded support beds.
ADVANTAGES
Clack Filter Sand is graded specifically for water filtration plants
Filter Sand can be used in municipal, industrial or residential applications
The spherical shape of uncrushed gravel promotes good flow and even distribution
PHYSICAL PROPERTIES
Filter Sand
Color: Light tan to reddish brown
Density: 100 lbs./cu. ft.
Mesh Size: 18x35*
Effective Size: 0.45-0.55 mm*
Uniform Coefficient: 1.6 or less*
Acid Solubility: 0.3-1.6%
Specific Gravity: 2.65-2.75
CONDITIONS FOR OPERATION
Filter Sand
Bed depth: 18-30 in.
Freeboard: % of bed depth (min.)
Backwash flow rate: 15-20 gpm/sq. ft.
Backwash bed expansion: 20% of bed depth
Service flow rate:
Municipal: 1.5-2 gpm/sq. ft.
Industrial: 3 gpm/sq. ft.
Domestic: 5 gpm/sq. ft.
*All physical properties and conditions for operation are the same for gravel with the
exception of mesh size, effective size and uniformity coefficient. |
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Drinking Water Treatment System
Components Classified by
Underwriters Laboratories Inc.® in
Accordance with Standard
ANSI/NSF 61-(1991)-57Y3 |
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The information and recommendations in this publication are based on data
we believe to be reliable. They are offered in good faith, but do not imply any warranty
or performance guarantee, as conditions and methods of use of our products are beyond our
control. As such, Clack makes no express or implied warranties of any kind with respect to
this product, including but not limited to any implied warranty of merchantability or
fitness for a particular purpose. We recommend that the user determine whether the
products and the information given are appropriate, and the suitability and performance of
our products are appropriate, by testing with its own equipment.
The information and recommendations given in this publication should not be
understood as recommending the use of our products in violation of any patent or as a
license to use any patents of the Clack Corporation.
The filter medias listed in this brochure do not remove or kill bacteria. Do
not use with water that is
microbiologically unsafe or of unknown quality without adequate disinfection before or
after the system.
Clack will not be liable under any circumstance for consequential or
incidental damages, including but not
limited to, lost profits resulting from the use of our products.
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R&M Manufacturing,
Inc.
