Dust Doctor: Working with exhaust fans
When you specify an exhaust fan for a dust control system, you must consider three important factors. First, of course, you must consider what fan will ensure that your system will work as expected. The second major factor is the exhaust air volume. Finally, you must consider noise and fan ratings.
Fan types -- Dust control systems typically use axial (paddle-type) fans and centrifugal fans (blowers). Most axial fans operate best at lower static pressures, so centrifugal fans are usually found in systems that include dust collectors and other air pollution control equipment because of the higher static pressures involved. The centrifugal fan family includes several fan blade designs that affect operating efficiencies and ruggedness. Your fan supplier can recommend the best design for your application based on your description of your everyday and special operating conditions.