Diatomaceous Earth Filters

Municipal/Industrial Vacuum D.E. Filtration System

Download Facts About Diatomaceous Earth Filters.

Features:

Corrosion-Proof Construction

No refinishing, protective liners or paint maintenance required for the life of the filter.

Fabricated from Vinylester Throughout

The Westfall Filter is impervious to the destructive forces of water and water treatment chemicals.

Visible, Economical Operation

Open tank construction allows visual checks of the entire operation: precoating, feeding of the filter aid and the actual filter operation.

Vacuum principle cuts operating costs: horsepower requirements are generally lower than for comparable size pressure diatomite filtration.

Compact, Convenient Design

Effective vacuum principle, flat-leaf element design, and filter aid (diatomaceous earth) combination assures sparkling clean, highly polished water at lower cost.

Water is saved during cleaning: long, wasteful backwashing cycles are eliminated and dirty filter cake breaks away easily from the smooth surface of the plastic elements.

Open tank design simplifies cleaning: hosedown, mechanical or chemical.

High Quality Water

Continuous filtration through non-corrosive diatomaceous earth filter provides a constant supply of highly polished water for your water system or process.

Depending on the type of turbidity, and the grade of diatomaceous earth filter aid chosen, particles as small as 0.1 micron can be removed.

Large Selection of Sizes

Standard units from 10 to 1290 square feet of filter area in single tank and large sizes are available.

Rate at 1 GPM/SF Area	Rate at 1 GPM/SF Area	Filter area sq.ft.	Qty. of Elements	MODEL NO.	APPROX. SIZE INCHES	"	"	APPROX. WT
MGD	GPM				LG	WD	HT
.04 .06 .08 .12 .15	30 40 60 90 110	30 40 60 90 110	3 4 6 9 11	1974-01 1974-02 1974-03 1974-04 1974-05	34 34 34 34 34	17.0 21.0 29.0 37.0 45.0	52.25 52.25 52.25 52.25 52.25	180 265 295 360 435
.21 .30 .42 .50	150 210 300 360	150 210 300 360	5 7 10 12	1975-01 1975-02 1975-03 1975-04	80 80 80 80	30.5 39.5 48.5 57.5	56.25 56.25 56.25 56.25	595 745 890 990
.63 .72 .83 1.00	450 510 600 720	450 510 600 720	15 17 20 24	1975-05 1975-06 1975-07 1975-08	80 80 80 80	66.5 75.5 84.5 98.0	56.25 56.25 56.25 56.25	1160 1335 1455 1875
1.25 1.42 1.79	900 1020 1290	900 1020 1290	30 34 43	1975-09 1975-10 1975-11	80 80 80	125.5 134.0 165.5	56.25 56.25 56.25	2220 2440 2980

Operations:

The raw or process water ise drawn through the filter and pumped into the system by the filter pump. Piping is arranged so that the water can be recirculated via a by-pass line for the purpose of precoating the elements prior to the actual filtration process.

Precoating is accomplished by introducing the suitable amount of diatomaceous earth powder into the filter tank and recirculating the mixture until the filter elements are uniformly coated and the water in the tank becomes clear. Water from the discharge side of the filter pump is then directed through main effluent pipes and into the finished water clearwell, or returned to the process.

As the filter run progresses and the suspended solids are removed, the differential across the cake will gradually increase until it reaches 15 inches of mercury.

At this time the filter pump will be manually shut down and the filter shall be washed. The drain valve is opened and with high-pressure hoses or an electrically operated wash device, the spent diatomite filter cake is flushed from the elements and the filter bottom.

How It Works:

At the beginning of a filter run, the filter elements are precoated with a smooth, even coating of diatomite filter aid. A porous filtering surface is maintained during operation by feeding additional filter aid (called body feed) at a continuous, controlled rate. As the water passes through the filter aid, all suspended turbidity and certain types of algae, bacteria, and other microorganisms are removed. Sterilization and pH control chemicals can be added after filtration if required.

Entering raw or process water is either pumped or flows by gravity through the level control valve and into the filter tank.
The water’s velocity is reduced by a specially shaped baffle, which distributes the flow evenly to all of the elements.
The water is then drawn through the diatomite filter aid, filter elements and collecting manifold by the filter pump.
The filtered water is then pumped through the rate of flow control valve, the rate of flow indicator and the filtered water effluent piping, into the system’s clearwell— or back into the process.

Westfall Pressure Washer Wand

Westfall Pressure Filter Washer saves time and reduces the need for acid cleaning.

The Pressure Washer Wand will quickly clean any pressure or vacuum filter.

Lateral Spray Pattern gives gentle thorough cleaning.

Mer-Maid style filter element

Construction:: Heavy Duty FRP
Size:: 48" x 60"

Replacement BIF Filter Sleeves

Where to look for BIF filter elements. Westfall.

BIF VFC Concentric Filter Elements

Westfall provides replacement sleeves for:

BIF
Bowser
Mer-Maid
Visual Vacuum Filters
we also make custom fabricationed filters

3-Piece D.E. Filter Capable of Fitting Through a 32” Door

Westfall Custom D.E. Filter Manifold Assembly

D.E. Recovery Flume

Open Top Fiberglass Tank

Includes Disposable Filter Aid Collection Bags

Fiberglass Reinforced Vinyl Ester Tank

24" Deep (internal)

D.E. Precoat Tank

Capacity:: 100 Gallons
Hopper:: Bag Loading
Mixer:: 1/2 hp
Eductor:: Bronze

2500 Series Dry Chemical Feeders

Standard Equipment:: FRP hopper; Wall mounted control panel; Wetting flume; Eductor; Solenoid valve; Check valve
Hopper Sizes:: 2 cu. Ft.; 4 cu. Ft.; 8 cu. Ft.