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Centri Air Filter Pre-Cleaners
Clamps onto your equipment's air intake

NOTE: Studies indicate that it only takes 8 ounces of dirt to ruin an engine
Centri pre-cleaners Remove dirt particles before they get to your air filter

For Help From CentriGo To: Centri PreCleaner Model Per Engine Model
Get Cleaner Air For your Equipment
Make Your Air Filter Last Much Longer
As A Result Prolong Your Engine Life
And Also Increase Engine Performance



Extends air filter life up to 12 times
Compatible with all air filter systems
Expels dirt so it is maintenance free
Removes dirt, chaff, dust, snow, rain
Aluminum & stainless steel construction
Precisely balanced for noise free operation
8 models cover 50-1600 cubic feet per minute

How It Works

1. Dirty air enters the Centri pre-cleaner, which is clamped onto your equipment air intake.
2. Specially designed vanes direct the air flow, move the dirty air toward the stainless steel impeller.
3. The impeller creates a tornado inside the pre-cleaner housing.
4. The centrifugal force of the tornado expels the heavier-than-air dirt, dust, chaff, etc. out of the discharge louver.
5. Cleaned air enters the engine intake pipe so the air filter element only has very light particles to remove.

On Centri models pages within our A&I on-line parts catalog, see slide show/video about how it operates. Depending on spacing and filter housing location, the Centri may be under the hood or above the hood. A three inch minimum clearance is required between your equipment’s hood and the bottom of the Centri.

Sizing Guidelines For Centri Pre-cleaners

The air intake inlet pipe size is NOT the determining factor for
choosing a pre-cleaner. Pre-cleaners must operate at a certain
RPM to be effective. Therefore, the pre-cleaner must be sized to
the engine. Within our on-line parts catalog in the pre-cleaner
model pages, use the automatic CFM calculator to determine the
proper size pre-cleaner for your application. Or you may use the
formulas guides below to make the CFM calculations yourself.


C.F.M. FORMULA
C.F.M.= CUBIC FEET PER MINUTE
For all engines, the C.F.M. can be determined by using the formula below:

4 CYCLE ENGINES

C.F.M. = C.I.D. x R.P.M. x Vol. Eff. / 3456

VOLUMETRIC EFFICIENCY:

Diesel

Naturally Aspirated = .85
Turbocharged = 1.60
Turbocharged-Aftercooled = 1.85
Gasoline
up to 2500 r.p.m. = .80
2500 to 3000 r.p.m. = .75
3000 to 4000 r.p.m. = .70
2 CYCLE ENGINES

C.F.M. = C.I.D. x R.P.M. x Vol. Eff. / 1728

VOLUMETRIC EFFICIENCY:

Diesel

Blower-Scavenged = 1.40
Turbocharged = 1.90
Turbocharged-Innercooled = 2.10
Gasoline
up to 2500 r.p.m. = .85
2500 to 3000 r.p.m. = .80
3000 to 4000 r.p.m. = .75

C.I.D.-Cubic Inch Displacement
R.P.M.-Revolutions Per Minute (high end of your main operating)
Vol.Eff.-Volume Efficiency

To convert Metric Displacements to C.I.D. for use in the formulas, use the following conversion factors:

Displacement in Cubic Centimeters (cm3) x 0.06102 = C.I.D.
Displacement in Liters x 61.02 = C.I.D.

NOTE: Engines equipped with twin air intake pipes, divide the engine
C.F.M. by two, and apply the proper Centri Pre-cleaner to each of the pipes.

The Centri pre-cleaner models, dimensions, and CFM Ranges

Product Specifications, U.S.
*Please make sure it’s going to fit your location before ordering.
They can be mounted straight up, sideways, and even upside down.

Part NO.
A Inches
B Inches
C Inches
Weight Pounds
Recommended
CFM Range
A-EX20
5.25
3.375
2
1
50-100
A-EX25
6.5
4.25
2.5
1.75
100-200
A-EX30
6.5
5.0
3
2.75
150-275
A-EX40
8.875
5.875
4
3.75
200-400
A-EX50
11.25
7.5
5
6.5
350-700
A-EX60
12.75
7.75
6
7.25
500-950
A-EX70
14.75
8.5
7
9.5
750-1350
A-EX80
14.75
8.5
8
9.5
950-1600

To Purchase Your Centri Pre-Cleaner, Please Enter Our:
Aftermarket Parts Catalog
(Enter part number above within catalog)

Reduce Vibration With Rubber Adapters - Highly Recommended !!!!

When your Centri Model Has The Same Inside Diameter As Your Air Cleaner Intake
Rubber Hump Hose With Clamp


Part #
I.D.-I.D.
Hose Length
A-94400
4”
5.5”
A-94500
5”
6”
A-94600
6”
7”
A-94700
7”
7”
A-94800
8”
6”

When Your Centri Model Has A Different Inside Diameter Than Your Air Cleaner Intake
Rubber Hump Hose Reducer With Clamp

Part #
I.D.-I.D.
Hose Length
A-954030
4” – 3”
5.25”
A-954045
4”-5.5”
6”
A-955040
5”-4”
5.5”
A-955055
5”-5.5”
6”
A-956050
6”-5”
6”
A-956055
6”-6.5”
6”
A-957060
7”-6”
6”
A-958060
8”-6”
6”
A-958070
8”-7”
5”

When You Want Anti-Vibration Rubber With Centri & Air Cleaner Nearly Touching
Short Rubber Insert Extrusion

*O.D. is of Centri opening and I.D. is of air cleaner intake opening

Part #
I.D.-I.D.
A-972522
2.5”-2.25”
A-973027
3”-2.75”
A-974030
4”-3”
A-974035
4”-3.5”
A-974037
4”-3.75”
A-975040
5”-4”
A-975045
5”-4.5”
A-975047
5”-4.75”
A-976050
6”-5”

NOTE: Additional steel adapter stacks, steel extension pipes, and
rubber elbows are available through our A&I catalog. Call us when
you are looking for such adapters. The Centri comes with a lifetime
warranty. This warranty doesn’t include damage to the Centri unit
caused by user misuse, abuse, accident, or improper installation.
Centri Pre-Cleaners Come With Mounting Instructions & Warranty

To Purchase Your Centri Pre-Cleaner, Please Enter Our:

Aftermarket Parts Catalog

WHAT WILL CENTRI PRECLEANERS FIT?

The Centri air filter pre-cleaner not only fits tractors, combines, and other AG equipment,
but it also works on mining equipment, construction equipment, road maintenance
equipment, logging equipment, and more. What kind of air filter will you keep cleaner?

 
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