2025 Nelsen Corporation Catalog - Catalog - Page 115
Filter-Ag Plus® 4
Clack Filter-Ag Plus® is a unique natural ore called clinoptilolite
that has many outstanding advantages over common granular filter
sands and multimedia used for suspended solids reduction. The
granules are angular in shape, with rough surfaces and micro porous
void spaces as small as 3 microns. This creates a surface area over
100 times greater than silica sand. The angularity of the granules
and the tapered internal pore spaces allow for reduction of dirt, silt
and organic matter suspended in water by bridging, straining and
adhesion. The rough surface and internal porosity provide a high
surface area for efficient reduction of suspended matter. Utilizing
deep bed filtration can typically reduce suspended solids down
to the 5 micron or less range. Filter-Ag Plus®’ structure typically
creates less pressure loss through the filter and allows deeper
sediment penetration into the bed for higher sediment loading and
longer filter runs. The deep bed filtration capacity of Filter-Ag Plus®
prevents a rapid buildup of head loss and blinding problems that are
associated with typical sand filters. The longer filter run times reduce
backwash frequency, which provides conservation of water. This
ideal combination of particle shape, texture and porosity make it a
good choice where quality water filtration and water conservation
are important.
Substantial savings can be realized when designing a system using
Clack Filter-Ag Plus®. Its low pressure drop, high service flow rates
and high bed loadings combined with lower backwash frequency
allow economy in equipment downsizing and reduced pumping
requirements. Its low density also saves on handling expense and
shipping costs.
Clack Filter-Ag Plus® can be applied to systems designed for
either pressure or gravity flow. Because of its unique physical
characteristics, Filter-Ag Plus® can be used to replace multimedia
(graded density) filter designs.
Air scour is possible and helpful when there is heavy loading in the
bed. It has to be done minimally in order to prevent too much bed lift
and/or advanced attrition.
An air scour of 1 to 2 cfm/ft² at backwash rates of 15 to 20 gpm/
ft² would be sufficient. The pressure required would be static
head pressure plus the psi necessary to deliver 1 to 2 cfm/ft². Bed
expansion should be observed to ensure that media is not being
discharged in the backfwash water. A one minute air scour at the
beginning of the backwash cycle should be sufficient. Prolonged air
scour may cause stratification of the smaller media to the top of the
bed which could affect future head loss.
Advantages:
• Deep bed filtration results in superior water quality and
reduces the load on downstream equipment.
• High sediment removal capacity results in longer filter runs, with a
substantial savings in backwash water and time out of service.
• High service flow rates result in lower equipment costs and a
savings in space.
• Reduced shipping cost due to lighter weight/cu.ft.
• Replacement of multimedia with Filter-Ag Plus® in existing
installations may increase filter capacity.
• Filter-Ag Plus® is an all-natural, environmentally safe product.
Physical Properties:
Color: ......................................................................... White to off white
Dry Bulk Density: .................................................................... 50 lbs/ft.3
Specific Gravity: ........................................................................ 2.2 g/cc
Mesh Size: .....................................................................................14x30
Effective Size: ............................................................................0.55mm
Uniformity Coefficient: .......................................................................1.8
Hardness: .................................................................... 4-5 (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 use
Backwash flow rate........................................................... 8-10 gpm/ft.2
Backwash bed expansion ....................................20-40% of bed depth
Upon installation allow bed to soak overnight before backwashing.
Certified to NSF/ANSI/CAN
Standard 61
Filter-Ag Plus®
Pallet quantity - 70 bags per pallet
FILAG-PLUS
1/2 Cubic Foot Bag (25 lb.)
FILAG-PLUS-50-BOX
1/2 Cubic Foot Box
FILAG-PLUS-75-BOX
3/4 Cubic Foot Box
FILAG-PLUS-100-BOX
1 Cubic Foot Box
Call Nelsen Toll-Free from Anywhere in the U.S. - 800.362.9686
All prices and products subject to change without notice. ©Nelsen Corporation
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Resins, Media & Chemicals
Filter-Ag Plus®
