SQA-109
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Chicago’s SQA fans have been selected for well over 100,000 industrial and commercial installations worldwide. The SQA fans are known for their exceptional durability and efficiency, and are continually updated and expanded to meet today’s requirements and tomorrow’s visions. This versatile innovative design packs maximum performance into a minimum footprint. Chicago’s SQAD is the direct drive alternative to the SQA fan. Size for size it delivers the same performance and efficiency in a more compact arrangement. All SQA fans are available for quick delivery. • Fan Sizes • SQA 8-3/4 to...

• Rugged Construction Heavy gauge steel housings are welded by AWS welders to assure structural integrity with extended durability. Flanged housing edges add to the fan’s exceptional rigidity. • Hyperbolic Wheel Cone Chicago’s exclusive hyperbolic spun steel wheel cone optimizes the smooth stable air flow across entire operating range. • Precision Shafts Shafts made from SAE 1045 carbon steel are turned, ground and polished to assure a tight bearing and hub fit. They are also sized to operate at least 20% below the first critical speed. • Adjustable Motor Base Arrangement 9 bases are...

• Inlets Open inlets, slip fit inlets and punched flanged inlets are available to meet installation requirements. • Inlet/OutletCompanion Flanges Structural angle assembly matches fan inlet or outlet flanges and allows fastening of ductwork for a flange-to-flange connection. • Outlet Dampers Designed to control air flow at low initial cost, outlet dampers (shown below) have punched flanges on both ends to simplify fan and duct connections. Parallel blades are standard with opposed blades available. Air volume is controlled manually or automatically by electric or pneumatic actuator. For...

Fan capacity tables are based on standard air at 70°F and sea level. For other operating conditions, correct the required Static Pressure (SP) before using the rating tables. The Brake Horsepower (BHP) is corrected after the fan selection has been made. Finally, determine the Class of fan. Percent Width selections are also available for the SQAD. Refer to Chicago Blower’s Fan.net selection software for exact selections. EXAMPLE: Select an SQA fan to handle 15,000 CFM at 3” SP at 500°F and at 2500 feet above sea level. 1. Refer to Table I. At 2500 feet and 500°F, the correction factor is...

CHICAGO BLOWER CORPORATION Outlet Area: .45 sq. ft. • Maximum BHP = .0126 (rpm 41000)2 Maximum Safe Speed RPM Class I | S000\ Tip Speed (fpm) = 2.47 x rpm FEG 90 CFM FPM FPM Outlet Area: .59 sq. ft. • Maximum BHP = .0227 (rpm 4 1000)2 Maximum Safe Speed |rpm| Class I | 4962| Tip Speed (fpm) = 2.82 x rpm FEG 90 Performance certified is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Performance ratings at 0.075 lbs/ft3 Density, 70°F, Sea Level Elevation.

CHICAGO BLOWER CORPORATION Outlet Area: 1.07 sq. ft. • Maximum BHP = .125 (rpm 4-1000)2• Tip Speed (fpm) = 3.81 x rpm Maximum Safe Speed RPM Class I | 3675 | Class II | 3884| Size 1S1/4

CHICAGO BLOWER CORPORATION Size 15 Outlet Area: 1.32 sq. ft. • Maximum BHP = .212 (rpm 4-1000)2• Tip Speed (fpm) = 4.24 x rpm Maximum Safe Speed RPM Class I | 3302 | Class II | 3SBB CFM FPM Size 1BVb Outlet Area: 1.59 sq. ft. • Maximum BHP = .341 (rpm 4 1000)2• Tip Speed (fpm) = 4.66 x rpm Maximum Safe Speed \rpM Class I | 2332| Class II | 3503| FEG BO CFM °M Performance certified is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Performance ratings...

CHICAGO BLOWER CORPORATION Outlet Area: 1.95 sq. ft. • Maximum BHP = .566 (rpm 41000)2• Tip Speed (fpm) = 5.15 x rpm Maximum Safe Speed RPM Class I | 2706| Class II | 3173 |

CHICAGO BLOWER CORPORATION Size 22 1/4 Outlet Area: 2.90 sq. ft. • Maximum BHP = 1.37 (rpm 4-1000)2• Tip Speed (fpm) = 6.28 x rpm Maximum Safe Speed RPM Class I | 2155 | Class II | 2483| Class III129431 Size 241/2 Outlet Area: 3.52 sq. ft. • Maximum BHP = 2.22 (rpm 4 1000)2• Tip Speed (fpm) = 6.92 x rpm Maximum Safe Speed \RPM Class I | 2015 | Class II | 2300| Class III12674 \ Performance certified is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories)....

CHICAGO BLOWER CORPORATION Outlet Area: 4.27 sq. ft. • Maximum BHP = 3.60 (rpm 4-1000)2• Tip Speed (fpm) = 7.62 x rpm Maximum Safe Speed RPM Class I | 1829 | Class II | 2087| Class III12425Size 30 Outlet Area: 5.27 sq. ft. • Maximum BHP = 6.01 (rpm 4 1000)2• Tip Speed (fpm) = 8.48 x rpm Maximum Safe Speed \RPM Class I 1647 Class II | 1BQ7\ Class III 21GB FEG 90 CFM FPM

CHICAGO BLOWER CORPORATION Size 33 Outlet Area: 6.38 sq. ft. • Maximum BHP = 9.68 (rpm 41000)2• Tip Speed (fpm) = 9.31 x rpm Maximum Safe Speed RPM Class I | 1413 | Class II | 1552 | Class III 19701 Size 36 1/s Outlet Area: 7.80 sq. ft. • Maximum BHP = 18.9 (rpm 4 1000)2• Tip Speed (fpm) = 10.3 x rpm Maximum Safe Speed |RPM| Class I | 1344 | Class II | 1497 | Class III 17001 • Performance certified is for installation type B - Free inlet, Ducted outlet. • Power ratings (BHP) do not include transmission losses. • Performance ratings do not include the effects of appurtenances (accessories)....

CHICAGO BLOWER CORPORATION Size 40 1/4 Outlet Area: 9.48 sq. ft. • Maximum BHP = 30.8 (rpm 4-1000)2• Tip Speed (fpm) = 11.37 x rpm Maximum Safe Speed RPM Class I | 903 | Class II | 1179 | Class III 1541 Size 44 1/s Outlet Area: 11.58 sq. ft. • Maximum BHP = 51.0 (rpm 4 1000)2• Tip Speed (fpm) = 12.57 x rpm Maximum Safe Speed |RPM| Class I | B17 | Class II | 1066 | Class III | 1394 Performance certified is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories)....