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Backward Inclined Centrifugal Ventilators

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Backward Inclined Centrifugal Ventilators are available with three wheel designs. Airfoil blades are the most efficient with the lowest sound levels. Curved blades are idea for high-volume, low-pressure applications. Single thickness is best suited for airstreams with light material. Two fan lines, General Purpose and Square Fans, utilize backward inclined wheels.


  Backward Inclined PDF Brochure
Wheel Design: Backward Inclined-Airfoil
Backward Inclined-Curved Blade
Backward Inclined-Single Thickness
Wheel Design

backward inclined airfoil wheel design

Backward Inclined- Airfoil: Aerodynamic airfoil-blade is the most efficient design with the lowest sound levels for clean air applications.






backward curved blade wheel design

Backward Inclined- Curved Blade: Curved, single-thickness blade is ideal for high volume, low pressure applications.

Backward Inclined – Single Thickness: Flat, single-thickness blade surface best suited for airstreams with light material.  

Design Features:

VOLUME - to 26,500 CFM (450,000 m3/hr)
PRESSURES - to 8" WG (1,990 Pa)
TEMPERATURES - to 650°F (343°C)
NINE SIZES - 12"-36" (305mm-915mm)

Available Materials of Construction:

Carbon Steel
Stainless Steel
Special Alloys

Product Bulletin: General Purpose Packaged Fans (051)
Guide Specifications: Specifying General Purpose Fans with AcoustaFoil Wheel (GS-051) Specifying General Purpose Fans with Backward Curved Wheels (GS-053) Specifying General Purpose Fans with PLR Wheel (GS-052)
Installation, Operation & Maintenance Manual: IM-150
Material Specifications: GP_Dims.pdf
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