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Centrifugal Fan

Airfoil Blowers: Model HDAF

  • All models available with housing and wheel widths from 50% to 100%, in 5% increments and two wheel types, to deliver the performance you need with a direct driven blower.
  • Airfoil blade wheel is fabricated of high-strength steel to assure long lasting, efficient operation.
  • Continuous welded housings, instead of lock seams, eliminate air leakage.
  • Heavy gauge steel bases, with internal bracing, maximize rigidity and assure long equipment life.
  • Blower housings can be rotated in 45° increments, on most sizes, to provide increased configuration flexibility in the field.
  • Removable inlet & drive side plates allow for removal of blower wheel or motor, or shaft and bearings on belt driven models, without disconnecting inlet or discharge connections.
  • Inlet side support assures a minimal vibration housing.
  • All fans receive a mechanical run test to assure proper balance and alignment before shipping.
  • Belt driven models include heavy-duty, grease lubricated, self-aligning, cast iron, pillow block bearings selected for optimal performance.
  • Fan shaft on belt driven models is turned, ground and polished and receives a high quality rust preventative coating prior to shipment.
  • Arrangement 8 units come standard with shaft/coupling guard.
  • Arrangement 9 and 9CB units come standard with belt guards.
  • Arrangement 10 units come standard with weather covers.
  • All models available with AMCA Type C, spark resistant construction. For AMCA Types A or B spark resistance, see Model HDBI Backward Inclined Blowers.
Benefits of Model "HDAF" Airfoil Blowers are:

INCREASED EFFICIENCY: Airfoil wheels provide the highest efficiency of all centrifugal fan designs. The static efficiency of an airfoil wheel versus a backward inclined wheel can easily exceed 10%. This benefit results in lower brake horsepower consumption and a reduction in sound levels of 2-6 dBA. Less expensive to operate and quieter.

MULTIPLE WHEEL SELECTIONS: Each size and class is available in multiple widths from 50% to 100%, in 5% increments and two wheel types, to deliver the exact performance you need with a direct driven blower. Complete design flexibility.

RUGGED CONSTRUCTION: Housings are heavy gauge steel and are continuously welded to prevent leakage. Fan bases are 7 and 10 gauge steel with internal bracing to prevent pulsation at all conditions. Less field problems.

ROTATABLE HOUSINGS: Most models have housings that can be rotated in 45° increments in the field. Allows for field conversion without replacing the blower.

EASE OF MAINTENANCE: Replacing a wheel or motor, or shaft and bearings on belt driven models, is easily accomplished without disturbing the inlet and/or discharge connections. Minimizes extended down time.

QUALITY COMPONENTS: All belt driven models have self-aligning, cast iron, grease lubricated, pillow block bearings sized for a minimum 150,000 hours average life. All fan shafts are turned, ground and polished and are coated with a high quality rust preventative before shipment. Long dependable service.

Features and Benefits
Centrifugal Fans Features & BenefitsSee the Cincinnati Fan difference.
Product Arrangements
Arrangements7 standard arrangements available.
Product Options
Centrifugal Fan OptionsStandard accessories that don't increase delivery schedules.
Product Catalog
Model HDAF Catalog27 page catalog in .pdf format.
Maintenance Manuals
Maintenance ManualSelect the .pdf format maintenance manual by arrangement.