Backward Curve



Robinson Backward Curve (BC) industrial fans represent a versatile fan series for quiet, high efficiency service. The Backward Curve design, for forced or induced-draft service, is used for a wide range of applications in many industries. BC fans are engineered and built to accommodate capacities to one million cfm and pressure ranges to 120 inches water pressure.

BC Series fans from Robinson are currently in operation in cement, power, coal, lime and paper facilities throughout the U.S. and the world. Robinson builds BC wheels to 180 inches diameter and, as required, units are constructed of special alloy materials.

Induced-Draft and Forced-Draft Service

  • Heat Recovery
  • Incineration
  • Air Pollution
  • Waste-to-Energy
  • Boiler Operations
  • Fluidized Bed
  • Combustion Air
  • Process Air

Research/Performance Testing

The BC fan is available from Robinson as a result of ongoing research and testing in Robinson’s lab facilities. BC prototype fans have been tested by Robinson on the basis of air performance, sound and vibration. Test data and field experience provide Robinson with the expertise to engineer and build fans for quiet, high-efficiency service.


Robinson “engineered” fans are designed to satisfy the requirements of individual applications and service conditions. Finite element stress analysis and resonant frequency testing are utilized to engineer fans that are dependable for optimum performance.

BC Repair and Rebuilding

Robinson Fans offers extensive repair and rebuild services as an alternative to new or replacement equipment.

Fan repair is cost effective

  • Robinson determines and corrects causes of equipment failure.
  • Robinson re-uses original components when possible.
  • Robinson incorporates unique design features for improved efficiency.

Wear, corrosion, component damage and material buildup lead to fan failure and costly system shutdown. A thorough maintenance program and periodic inspection of equipment help prevent problems.

Robinson’s team of service representatives is available for fan inspection and emergency consultation/service.

Primary Industries Served

  • Steel
  • Mining
  • Cement
  • Ceramic
  • Chemical
  • Woodworking

Typical Air-Moving Applications

  • Building ventilation
  • Fume removal
  • Dust removal
  • Dust collection
  • Pneumatic conveying
  • Oven and dryer exhaust
  • Combustion air
  • Incinerators
  • Heat recovery