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Packaged Forced Draft (PFD) Fans
Initially developed 30 years ago for packaged boiler systems, Chicago's Packaged Forced Draft fan has earned a reputation as the industry standard. The PFD is a compact, direct connected, airfoil bladed fan offering exceptional reliability. To afford the highest efficiencies throughout the performance range, there are three wheel diameters available for each fan size. Fan and wheel width can also be varied to obtain maximum performance. For systems design versatility, seven standard discharge positions can be specified in each rotation.
Product Bulletin: PFD
Operation & Maintenance Manual : Packaged Forced Draft and Heavy Duty Fans-Arrangement 4
Packaged Forced Draft Fan Applications
Chicago's Packaged Forced Draft fans are specified by the world's major manufacturers of boiler and burner systems. On the typical downdraft boiler installation the fan is mounted directly on top of the burner windbox. Chicago's PFD fans are also used extensively in combustion air, supply air and primary air applications. In addition, they are utilized for liquid agitation and product cooling and drying.
Fan Options
  • Inlet volume control
  • Inlet screen
  • Inlet sleeve
  • Flanged inlet
  • Access door
  • Drain
  • Outlet damper
  • Percent width/ non-standard motor
  • Shaft seal
  • Shaft cooler and guard
  • Shaft bearing and coupling guard
  • Bolt-on inlet box
  • Box base
  • Pre-spin inlet box damper
  • Efficiencies to 82%
  • Non-overloading horsepower curve
  • Steep pressure curve
  • Excellent turn-down capabilities
  • Complete Packaged Fans
  • Sizes: 2000 to 5414
  • Volumes to 120,000 CFM
  • Pressures to 58” wg
  • Temperatures to 800°F
Alternate Fan Designs
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