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Low- & High-Speed Centrifugal Fans

The BROCK® Aeration System product line offers both low- and high-speed Centrifugal Aeration Fans to meet your operation’s needs.


Features
Durably Built for Long Service Life

Totally-Enclosed, Fan-Cooled Motors
Totally-enclosed, fan-cooled (TEFC) motors are standard for all Brock GUARDIAN® Series centrifugal fans.

Corrosion-Resistant Screen Guard
A 10-mil PVC coating on the screen guard provides superior corrosion resistance and attractive appearance.

Durable Fan Housing
All Brock GUARDIAN® Series Centrifugal Fans have a reinforced, 12-gauge, galvanized steel housing for durability and long fan life.

Adjustable Leveling Feet
Brock’s Centrifugal Fan models have adjustable feet to assist leveling the unit on the fan platform.

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Well-Balanced Design for Highly Efficient Operation

Dynamically Balanced Centrifugal Wheel
A dynamically balanced, seam-welded steel centrifugal wheel features modern air foil blade design to help maximize air performance.

Innovative Air Inlet Orifice
GUARDIAN® Series Centrifugal Fans use an innovative design to promote better air flow into the centrifugal wheel to enhance fan performance.

Diverter & Baffle
A diverter and baffle help to redirect air spilling from the centrifugal wheel to encourage smooth, efficient fan operation.

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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.
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Specifications
Select Tab:
Low-Speed Centrifugal Fans (1750 RPM) High-Speed Centrifugal Fans (3450 RPM) Low-Speed Centrifugal Fan Transition Options High-Speed Centrifugal Fan Transition Options Airflow RatingsAirflow Ratings

Airflow Ratings (CFM at Static Pressure in Inches)

ModelHP0.01.02.03.04.05.06.07.08.09.010.0
LC22-335,5645,2034,7424,1833,5262,769
LC22-559,0958,5047,7526,8385,7634,526
LC24-77.511,74511,11210,3779,5428,6067,5696,431
LC24-101014,44513,66612,76311,73610,5849,3097,909
LC27-101013,47512,80312,04711,20710,2839,2758,1837,007
LC27-151519,25018,29017,21016,01014,69013,25011,69010,010
LC27-202020,79219,98919,09418,10517,01915,83414,54913,161
LC30-252524,85724,17123,35222,40021,31420,09518,74317,25715,63813,886
LC30-303026,10025,38024,52023,52022,38021,10019,68018,12016,42014,580
LC33-404034,08032,80131,50830,19828,87227,52826,16524,78123,37621,94820,496
LC33-505037,00035,88734,74633,57232,36131,10829,80828,45827,05325,58924,060

Notes

Airflow ratings have been determined by an independent fan testing facility in accordance with AMCA Standard 210.

Airflow Ratings (CFM at Static Pressure in Inches)

ModelHP0.02.04.06.08.010.012.014.016.018.020.0
HC15-33.02,6572,4922,2942,0521,7551,392
HC15-55.04,5054,2253,8903,4802,9762,360
HC18-77.55,2504,9574,6524,3213,9523,5353,0562,505
HC18-1010.06,9206,5356,1325,6955,2104,6604,0293,302
HC18-1515.010,5009,9159,3038,6417,9057,0706,1135,009
HC22-2020.09,4609,0888,6998,2947,8717,4276,9626,4745,9625,4234,858
HC22-2525.011,61011,15310,67710,1799,6609,1158,5447,9467,3176,6565,962
HC22-3030.013,97513,42512,85112,25311,62710,97210,2859,5648,8078,0127,176
HC22-4040.018,49017,76217,00416,21215,38414,51713,60812,65411,65210,6009,494
HC22-5050.021,50020,65319,77218,85117,88816,88015,82314,71413,54912,32611,040

Notes

Airflow ratings have been determined by an independent fan testing facility in accordance with AMCA Standard 210.

Transitions



Model


Fan Horsepower

Centrifugal
Wrap-Around
Centrifugal
44 in. (1,118 mm)
Wide Bolted
Centrifugal
67 in. (1,702 mm)
Wide Bolted
LC22-33.0Recommended
LC22-55.0Recommended
LC24-77.5Recommended
LC24-1010.0RecommendedOptional
LC27-1010.0RecommendedOptional
LC27-1515.0Recommended
LC27-2020.0Recommended
LC30-2525.0RecommendedOptional
LC30-3030.0RecommendedOptional
LC33-4040.0Recommended
LC33-5050.0Recommended

Transitions



Model


Fan Horsepower

Centrifugal
Wrap-Around
Centrifugal
44 in. (1,118 mm)
Wide Bolted
Centrifugal
67 in. (1,702 mm)
Wide Bolted
HC15-33.0Recommended
HC15-55.0Recommended
HC18-77.5Recommended
HC18-1010.0Recommended
HC18-1515.0Recommended
HC22-2020.0Recommended
HC22-2525.0Recommended
HC22-3030.0Recommended
HC22-4040.0Recommended
HC22-5050.0Recommended
Literature