[an error occurred while processing this directive] M E D I A   F I L T R A T I O N
AGF (All Plastic Media Filters)

AGF TECHNOLOGY
Operations
Media Types
AGF PRODUCTS
48" Filter Battery
96" Filter Battery

The new generation of Arkal AGF Gravity Filters
provides long lasting service with very low maintenance.


Chemical & UV Resistant

Polyethylene inner layer resistant to stress cracking, chemical attack, and UV degradation.

Easy Installation - Compact Modular Design

Smaller footprint and lower backwash volumes vs. standard media bed filters.
Removable and Adjustable Legs Provide Easy On-Site Assembly.

Access Ports Provide Easy Inspection and Simplifies Loading and Unloading of Media

Leak-free ports sealed with submarine-type oval cover.

Unique distributor plate for even distribution of unfiltered water.

Maintains a flat, level media surface, even under high flow conditions.

AGF TECHNOLOGY

OPERATION
The AGF filter vessel has two large access ports, one at the top of the tank for inspection and gravel loading, the other at the bottom of the tank for unloading and maintenance. The sealing system incorporates leak-free ports sealed with submarine-type oval cover secured by water pressure.


Click on image for animation    
Filtration Process

Unfiltered water enters AGF filters through a three-stage distributor plate and reaches the media bed with minimal turbulence. Contaminants are trapped as the water flows through the media bed. 54 mushrooms in the underdrain create uniform collection of the filtered water.

During filtration, head loss across the filter media will increase due to the accumulation of solids within the media. When it reaches the differential pressure limit, the media will be backflushed to remove the accumulated solids.

Backflushing Process

During the backflush, the flow of clean, filtered water from one or more tanks in the battery is reversed through one filter via a three-way valve. As the flow is reversed, the media bed is lifted and expanded, and contaminants are flushed out through the backflush manifold.

The unique design of the underdrain system is critical to ensure uniform lifting of the media bed during the backflush process and for minimizing the amount of backflush water required.

Once the backflush is completed and all solids and contaminants are removed, the valves return the flow of water to the normal filtration process.

    Click on image for animation

FILTRATION MEDIA
  Quartz   Min. Max. Ave. Backflush flow rate
  Top Layer 0 0.3 0.5 0.4 110-176 gpm
  Support Layer 2 0.8 1.5 1.1 154-242 gpm

Zeolite Filtration Media - A Superior Replacement for Sand Filtration

A2 offers proprietary A2Z Natural Zeolite Filter Media for replacement of existing sand media applications. A2Z Zeolitešs porous structure allows increased flow rates, improved filtration, and reduced backwash volume. A2Z Zeolite can be used for physical filtration, ion exchange filtration and treatment, or as agglomerating agents for FLOC development.

Natural zeolite, a clinoptilolite, is formed from volcanic ash as it is mineralized by alkaline water passing through it over millions of years. The resulting Zeolite minerals are a framework of aluminosilicates with an extending three-dimensional network of AIO4 and SiO4 tetrahedra linked to each other by sharing of the oxygens. This linked network forms a very porous molecular structure, thereby increasing the effective filtration surface area and capacity.

Replace Sand Media with A2Z Zeolite to Increase Flow Rates and Filtration Efficiency, and Reduce Unwanted Nitrogen Compounds

Superior Porosity Zeolite is very porous - one gam of zeolite has 30-60 m2 surface area! This high porosity means that zeolite filtration occurs between zeolite grains and within zeolite grains; sand filtration occurs only between sand grains. With increased porosity comes more efficient filtration.

Reduce Backwash Volume Zeolite is roughly half the density of sand filtration media, so while the volume of media is the same, the weight is half that of sand. Due to the desntiy difference, only half of the back wash flow is required to effectively lift and backwash the zeolite media bed.

Increase Flow Rates by 20-30% Without Modifications Due to the increased porosity, natural zeolite typically increases flow rates by 20-30% as compared to sand.

5 Micron Rating Typical filtration gradient for zeolite allows for particulate removal down to less than 5 microns. Reduce Unwanted Nitrogen compounds Zeolites have an affinity for ammonia and chloramine compounds, naturally reducing any unwanted nitrogen compounds.

Ion Exchange Capability A2Z natural zeolite granules are high-surface area, alumino-silicate minerals with a cation exchange capacity in excess of 100 meg./100 grams.

Costs, Shipping and Efficiency On a unit volume basis, the cost of zeolite for physical filtration is approximately the same as high quality sand. The benefits for using zeolite - better filtration and lower backwash volumes - make any cost difference insignificant.

Shipping options are palletized 50 pound sacks, super sacks, or train carloads. We have flexibility to ship any amount and can help you find the most suitable container for your shipping and installation needs.

Comparative Flow and Filtration

A2Z Zeolite's porous structure allows increased flow rates, improved filtration and reduced backwash volume.






A2Z Zeolite Technical Specifications

A2Z ZEOLITE TECHNICAL SPECIFICATIONS
  Particle Size of the Zeolite The media is available in different sizes; however, the most common particle size available is the 14 by 40 mesh size, or a 1.40mm to 0.30 mm size.
  d10 0.55mm = Effective Size (by definition)
  d60 0.90mm
  Uniformity Coefficient UC
  Shape Factor 0.68
  Bulk Density 0.66 g/cc
  Color Off-White
  Pore Volume Approximately 38 percent
  Ion-exchange Capacity 100 meq./100 grams, depending upon concentration of competing ions
  Wet Particle Distribution 1
  Bed Expansion at 20 gpm/ft2 30 to 50 percent
  Abrasion Resistance ASTM c-131
  Crushing Strength 2,500 lbs/inch3

AGF PRODUCTS

48" AGF Filter Battery

Filter Diameter:48"
Flow Rate: (Single Filter):308 gpm
Diameter inlet/outlet:4" ( victualic)
Filter Diameter:48" (1220mm)
Distance between end connections:3.6 ft
Distance between filters:4.3 ft
Weight:260 lbs
Max. Operating pressure: 85 psi (6 bar)

CLICK HERE FOR INFO ON ZEOLITE FILTRATION MEDIA

CHART A - VOLUMES AT RATED FLOW X FT2
  Filter Number Model Manifold Maximum
Working
Pressure (psi)
Filtration
Area-ft2
Weight
(Filters Only)
(Pounds)
Media Req. (Pounds)
  1 AGF48-1 ---- 85 12.5 265 1500
  2 AGF48-2 6" 85 25 530 3000
  3 AGF48-3 6" 85 37.5 795 4500
  4 AGF48-4 T 6" x 10" x 6" 85 50 1060 6000
  5 AGF48-5 T 6" x 10" x 6" 85 62.5 1325 7500
  6 AGF48-6 T 6" x 10" x 6" 85 75 1590 9000

CHART A - VOLUMES AT RATED FLOW X FT2
  Filter Number Model Manifold Dirty Water
14-18 gpm/ft2
Average Water
18-28 gpm/ft2
Clean Water
23-28 gpm/ft2
  1 AGF48-1 ---- 175-225 225-290 290-350
  2 AGF48-2 6" 350-450 450-575 575-700
  3 AGF48-3 6" 525-675 675-860 860-1050
  4 AGF48-4 T 6" x 10" x 6" 700-900 900-1150 1150-1400
  5 AGF48-5 T 6" x 10" x 6" 875-1125 1125-1440 1440-1750
  6 AGF48-6 T 6" x 10" x 6" 1050-1350 1350-1725 1725-2100

CHART B - DATA FOR 48" A.G.F. TANK SYSTEMS
(DIMENSIONS IN INCHES)
    48-1 48-2 48-3 48-4 48-5 48-6
  A. Inlet/Outlet Diameter 6 6 6 10 10 10
  B. Tank Distance 52 52 52 52 52 52
  C. Inlet/Outlet Reference 11 11 11 11 11 11
  D. Backwash Line Diameter 4 4 4 4 4 4
  E. Backwash Valve Outlet 3th.
4Vic.
3th.
4Vic.
3th.
4Vic.
3th.
4Vic.
3th.
4Vic.
3th.
4Vic.
  F. Backwash Height 65.5 65.5 65.5 65.5 65.5 65.5
  G. Inlet Height 78.3 78.3 78.3 78.3 78.3 78.3
  H. Outlet Location 24.4 24.4 24.4 24.4 24.41 24.41
  J. Outlet Height 12.4 12.4 12.4 12.4 12.44 12.44
  K. Width 48.8 48.8 48.8 48.8 48.8 48.8
  L. Length 48.8 100.83 153 218.3 270.3 322.3





96" AGF Filter Battery

The 96" AGF Filter Battery has been designed and manufactured to meet the needs of applications requiring filtration of high water volumes, therefore reducing the number of batteries required. Contact your A2 Sales Representative to determine what is available for your specific needs.

CLICK HERE FOR INFO ON ZEOLITE FILTRATION MEDIA




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