2023 Online Catalog - Flipbook - Page 128
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Filter-Ag®
Filter-Ag®
Clack Filter-Ag has many outstanding advantages over the
more common granular filter media used for suspended solids
reduction. Its fractured edges and irregular surface provides a
high surface area and complex flow path for efficient removal
of suspended matter through out the filter bed, typically
reducing suspended solids down to the 20-40 micron range.
The larger particle size creates less pressure loss through
the filter and allows deeper sediment penetration into the
bed for higher sediment loading and longer filter runs.
This large and irregular shape prevents the screening and
caking of sediment in the top several inches of the filter bed as
happens in the typical sand filter, thus preventing a rapid build
up of head loss and blinding problems. Filter-Ag®’s light weight
means lower backwash rates and better bed expansion to release
trapped sediment and rinse the filter media during the backwash
cycle. This ideal combination of particle shape, size and density
make it a good choice where quality water filtration and water
conservation are important.
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Resins, Media & Chemicals
Although not intended to be an iron reduction media, extensive
field experience has shown Filter-Ag®’s rough and jagged surface
to be very good at entrapping the fragile iron flock that forms
after dissolved iron has been oxidized. The fragmented edges
are apparently good flock collection points for the precipitated
iron. Typical oxidation methods include aeration, ozonization and
chlorination.
Substantial savings can be realized when designing a system
using Clack Filter-Ag . Its low pressure drop, high service flow
rates and high bed loadings combined with lower backwash rates
allow economy in equipment downsizing and reduced pumping
requirements. Its light apparent density also saves on handling
expense and shipping costs.
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Filter-Ag can be applied to systems designed for either pressure
or gravity flow. Because of its unique density, Filter-Ag can also
be used in multi-media (graded density) filter designs allowing a
more flexible approach to difficult filtration problems.
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Advantages:
• There is less pressure loss through a bed of Filter-Ag than
through most other filter media
• Light weight requires lower back-wash rates than those required
for other filter media
• High service rates result in lower equipment costs and a
savings in space
• High sediment reduction capacity results in longer filter runs,
with a substantial savings in backwash water and time out of
service
• Reduced shipping cost due to light weight/cu. ft.
• Replacement of sand with Filter-Ag in existing installations may
increase filter capacity 100% or more. Caution should be taken
upon start-up that the lightweight Filter-Ag is not washed to
drain.
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Physical Properties:
Color........................................................................................ Light grey to near white
Bulk Density ........................................................................................24-26 lbs./cu. ft.
Specific Gravity ............................................................................................. 2.25 gm/cc
Mesh Size ..................................................................................................................... 12 x 30
Effective Size ..........................................................................................................0.67 mm
Uniform Coefficient.......................................................................................................... 1.8
Hardness.....................................................................................................6 (Mohs scale)
Conditions for Operation:
Water pH range .............................................................................................wide range
Maximum water temperature......................................................... 140°F/60°C
Bed depth .................................................................................................................. 24-36 in.
Freeboard ........................................................................... 50% of bed depth (min.)
Service flow rate ........................................................... 5 gpm/sq. ft., although
considerably higher rates are often used
Backwash flow rate......................................................................8-10 gpm/sq. ft.
Backwash bed expansion .......................................... 20-40% of bed depth
Upon installation allow bed to soak overnight before backwashing.
Certified to
NSF/ANSI 61
Filter-Ag®
Filter-Ag is a very efficient filter medium for the removal of suspended material and turbidity.
Less pressure loss and finer filtration is possible because of its light weight and irregular surface
characteristics.
Pallet quantity - 70 bags per pallet
$
FILAG
1 Cubic Foot Bag (25 lb.)
37.10
$
FILAG-50-BOX
1/2 Cubic Foot Box
41.90
$
FILAG-75-BOX
3/4 Cubic Foot Box
51.80
$
FILAG-100-BOX
1 Cubic Foot Box
62.50
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For more information visit – NelsenCorp.com
• Commercial.NelsenCorp.com •
All prices and products subject to change without notice. ©Nelsen Corporation
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