Filter-Ag® has many outstanding advantages over the
more common granular filter medias 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 throughout the filter
bed, typically reducing suspended solids down to the 20-40
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. The 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 buildup of headloss and blinding problems.
light weight means lower backwash rates and better bed
expansion to release trapped sediment and rinse the filter
media during the backwash cycle. The combination of particle
shape, size and density make it a good choice where quality
water filtration and water conservation are important.
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.
Typical oxidation methods include aeration, ozonation
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 weight also saves on handling
expense and shipping costs.
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
is less pressure loss through a bed of Filter-Ag®
than through most other filter medias
Light weight requires lower backwash rates than those
required for other filter medias
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.)
Light grey to near white
Density: 24-26 lbs./cu. ft.
Specific Gravity: 2.25 gm/cc
Mesh Size: 12 x 30
Effective Size: 0.67 mm
Uniformity Coefficient: 1.8
Hardness: 6 (Mohs scale)
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
is a registerd Tradmark of Clack Corp.