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Axial Fans Axial Fans >  >  >  >  > Axial Fans
## Economical Axial Fans
The BROCK® Aeration System product line offers economical GUARDIAN® Series Vane Axial Aeration Fans with high airflows at low static pressures.
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Features
Durably Built for Long Service Life
**Totally-Enclosed, Air Over Motors**
**Highly Stable Motor Mount**
A two-piece bolt-together motor mount/fan support provides a solid connection for mounting the fan and aids fan stability during operation.
**Corrosion-Resistant Screen Guard**
A 10-mil PVC coating on the screen guard provides superior corrosion resistance and attractive appearance.
!Innovative Design for Efficient Operation
**Air Vanes for Reducing Air Turbulence**
Air vanes are a standard feature on all 18-inch (457-mm) diameter and larger axial fans. The vanes aid efficient air flow at higher static pressures by reducing air turbulence.
**Dynamically Balanced Blades**
The dynamically balanced cast aluminum blades have modern air foil design for efficient air handling.
**Innovative Venturi Design**
The fan’s venturi opening uses an innovative curvature design for efficient air performance.
!Fan Transitions to Help Optimize Grain Airflows
The BROCK® Aeration System’s selection of components includes BROCK® Fan Transitions and related options for excellent aeration performance with reliably smooth operation. Brock’s family of fan transitions offers:
* A selection of durable, galvanized steel wrap-around and bolted transitions designed to optimize airflow into the grain while minimizing pressure losses.
* Exclusive patented back-draft damper options that automatically prevent under-floor pressure from flowing air back through a fan that is not running. Dampers are recommended for multiple fan installations.
* Extensions for supporting bin floors in full-floor bins are standard and help to minimize airflow obstructions into the aeration plenum.
Reliable Control Box
A standardized control box is used with all Brock GUARDIAN® Series fans and heaters.
* Controls are specifically matched to each fan or heater unit.
* Control boxes are made of durable polycarbonate and include a hinged translucent cover.
* The control housing is weather- and dust-proof and rodent-resistant.
* Standard components are used for safe and reliable motor control.
* Adjustable overload protection is included.
* Brock heater controls use an industrial-design ignition transformer.
!
Specifications
Axial Fans:Airflow Ratings (3450 RPM) Transition Options 
### Airflow Ratings CFM at Static Pressure in Inches
| Model | HP | 0.0 | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| AX12-075 | 0.75 | 2,320 | 2,010 | 1,480 | 980 | 630 | 430 |  |  |  |  |  |  |  |  |  |
| AX12-1 | 1.0 | 2,320 | 2,010 | 1,480 | 980 | 630 | 430 |  |  |  |  |  |  |  |  |  |
| AX14-1 | 1.5 | 3,350 | 3,050 | 2,530 | 1,950 | 1,410 | 1,000 | 740 |  |  |  |  |  |  |  |  |
| AX16-1 | 1.5 | 3,650 | 3,310 | 2,840 | 2,320 | 1,810 | 1,340 | 930 | 580 |  |  |  |  |  |  |  |
| AX18-2 | 2.0 | 4,750 | 4,390 | 3,920 | 3,350 | 2,700 | 2,040 | 1,430 | 990 |  |  |  |  |  |  |  |
| AX18-3 | 3.0 | 5,990 | 5,720 | 5,430 | 5,030 | 4,500 | 3,840 | 3,100 | 2,360 | 1,730 | 1,370 |  |  |  |  |  |
| AX22-4 | 4.5 | 9,160 | 8,670 | 8,250 | 7,790 | 7,220 | 6,510 | 5,650 | 4,710 | 3,770 | 2,970 | 2,480 |  |  |  |  |
| AX24-5 | 5.0 | 12,300 | 11,770 | 11,130 | 10,380 | 9,510 | 8,540 | 7,490 | 6,390 | 5,290 | 4,250 | 3,320 | 2,580 | 2,130 |  |  |
| AX24-7 | 7.5 | 13,500 | 13,140 | 12,630 | 11,960 | 11,170 | 10,270 | 9,290 | 8,250 | 7,190 | 6,140 | 5,130 | 4,210 | 3,440 |  |  |
| AX24-10 | 10.0 | 15,490 | 15,160 | 14,580 | 13,790 | 12,840 | 11,750 | 10,570 | 9,320 | 8,060 | 6,810 | 5,610 | 4,490 | 3,500 |  |  |
| AX26-12 | 12.0 | 14,690 | 14,090 | 13,570 | 13,070 | 12,550 | 11,990 | 11,350 | 10,620 | 9,780 | 8,820 | 7,740 | 6,540 | 5,240 |  |  |
| AX28-15 | 15.0 | 16,330 | 15,880 | 15,460 | 15,020 | 14,570 | 14,090 | 13,560 | 12,980 | 12,340 | 11,640 | 10,880 | 10,060 | 9,190 | 8,260 | 7,300 |
### Notes
| Airflow ratings have been determined by an independent fan testing facility in accordance with AMCA Standard 210. |
| --- |
### Transitions
| Model | Fan Horsepower | Axial Wrap-Around | Axial Bolted |
| --- | --- | --- | --- |
| AX12-075 | .75 | Optional | Recommended |
| AX12-1 | 1.0 | Optional | Recommended |
| AX14-1 | 1.5 | Optional | Recommended |
| AX16-1 | 1.5 | Recommended | Optional |
| AX18-2 | 2.0 | Recommended | Optional |
| AX18-3 | 3.0 | Recommended | Optional |
| AX22-4 | 4.5 | Recommended |  |
| AX24-5 | 5.0 | Recommended |  |
| AX24-7 | 7.5 | Recommended |  |
| AX24-10 | 10.0 | Recommended |  |
| AX26-12 | 12.0 | Recommended |  |
| AX28-15 | 15.0 | Recommended |  |
AirSolver® Fan Selection Software
AirSolver® Fan Selection SoftwareAirSolver® Fan Selection Software Made Easy.
Literature
Brock Aeration Systems BR-2174-202304 **(2.51MB)**Sistemas de Aireación Brock BR-2234-201304-ES **(2.43MB)**Brock Solid Grain Drying & Conditioning BR-2276-202301 **(821.14kB)**
##### BROCK GRAIN SYSTEMS
A Division of CTB, Inc.
611 North Higbee Street • P.O. Box 2000
Milford, IN 46542-2000 U.S.A.
sales@brockgrain.com+1-866-658-4191
CTB, Inc. () is a leading global designer and maker of systems and solutions for storing, conveying and preserving grain; producing poultry, pigs and eggs; and processing poultry and other foods. The company also produces buildings, stables, software for food processing and products for various other applications.
Copyright © 2025 CTB, Inc. All Rights Reserved.
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Direct Engine-Drive Fans Direct Engine-Drive Fans >  >  >  >  > Direct Engine-Drive Fans
## Direct Engine-Drive Fans Are a Versatile Ventilation Option
The Brock GUARDIAN® Series Low-Speed (1750 RPM) Centrifugal Fan is designed for direct engine-drive use. Use a flexible coupling to link this fan to irrigation and other utility engines.
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**Durable Steel Housing**
Reinforced heavy-duty galvanized steel housing offers durable and long fan life.
**Adjustable Feet**
Adjustable feet make it easy to level the unit on the fan’s foundation.
**Heavy-Duty Shaft**
A heavy-duty 2-inch (51-mm) diameter high-tensile steel drive shaft is designed to hold up under demanding conditions.
**Double Pillow-Block Bearings**
The industrial grade double pillow-block bearing configuration eliminates the need for a flanged bearing on the inlet side of the fan. This bearing configuration also prevents the reduction in air flow performance caused by locating a flange bearing on the inlet side.
!Dynamically Balanced Centrifugal Wheel for Improved Air Flow
A dynamically balanced centrifugal wheel features advanced air foil blade design to help promote better air flows.
Other Brock GUARDIAN® Series Fans
Axial FansThe economical GUARDIAN® Series Vane Axial Aeration Fans offer high airflows at low static pressures.Centrifugal FansThe BROCK® Aeration System product line offers both low- and high-speed Centrifugal Aeration Fans.Centrifugal In-Line FansCentrifugal In-Line Aeration Fans offer low airflows at high static pressures.Double-Inlet FansDouble-Wide, Double-Inlet (DWDI) Centrifugal Fans offer high efficiency, low noise and low energy requirements.
Brock Aeration Systems BR-2174-202304 **(2.51MB)**Sistemas de Aireación Brock BR-2234-201304-ES **(2.43MB)**