Industrial fans and blowers are machines whose primary function is to provide a large flow of air or gas to various processes. This is often achieved by rotating a number of blades, connected to a hub and shaft, and driven by a motor or turbine. The flow rates of these fans range from approximately 200 to 2,000,000 cubic feet (5.7 to 57000 cubic meters) per minute. A blower is another name for a fan that operates where the resistance to the flow is primarily on the downstream side of the fan.
Most industrial fans may be categorized into one of two general types: centrifugal fans and axial fans.
Centrifugal Fans have the following sub-categories: Air foil, Backward Curve, Backward Inclined, Radial Blade, Forward-Curved Radial Tip, Paddle-Wheel, Forward-Curve, Industrial Exhauster, Pre-engineered Fan (PE), Pressure Blower, Surgeless Blower, Mechanical Vapor Recovery Blower, Acid Gas Blower, and Specialty Process Gas Blower.
Axial Fans have the following sub-categories: High-Temperature Axial Fan, Tube Axial Fan, Vaneaxial Fan, Variable Pitch Axial fan, Variable Pitch on-the-fly Axial Fan, Cooling fan, and Mixed-flow fan.