Centrifugal Fans

Centrifugal FansOur centrifugal fans and axial fans are used for a variety of different applications across the globe. Project experience sizes range from 1,000 Cubic Feet Per Minute (CFM) to 1.1 Million CFM. Typically, when looking for a fan most end users are concerned with the revolutions per minute (RPM) of the fan blades, the static pressure rating, efficiency rating, delivery time, and cost. Industrial Boilers America (IBA) fans are able to reach efficiencies greater than 80% while maintaining a low fan speed (below 1800 RPM). Our engineers can design the right fan for your application at a competitive price and delivery. Fan arrangements include direct drive and belt drive, while configurations range from backward curve blades to forward curve blades. Various applications require we put the fan on the clean or dirty air side, demanding that the fans maintain high quality while in the harshest of conditions. IBA fans use the highest quality motors, bearings, belts, couplings, and steel on the market to construct and assemble your next centrifugal fan, blower, or axial fan. A centrifugal fans is a mechanical device for moving air or other gases. The terms “blower” and “squirrel cage fan” (because it looks like a hamster wheel) are frequently used as synonyms. These fans increase the speed of air stream with the rotating impellers. They use the kinetic energy of the impellers or the rotating blade to increase the pressure of the air/gas stream which in turn moves them against the resistance caused by ducts, dampers and other components.

Centrifugal fans accelerate air radially, changing the direction (typically by 90o) of the airflow. They are sturdy, quiet, reliable, and capable of operating over a wide range of conditions. Centrifugal fan is a constant CFM device or a constant volume device, meaning that, at a constant fan speed, a centrifugal fan will pump a constant volume of air rather than a constant mass. This means that the air velocity in a system is fixed even though mass flow rate through the fan is not. The centrifugal fan is one of the most widely used fans. Centrifugal fans are by far the most prevalent type of fan used in the HVAC industry today. They are usually cheaper than axial fans and simpler in construction. It is used in transporting gas or materials and in ventilation system for buildings.They are also used commonly in central heating/cooling systems. They are also well-suited for industrial processes and air pollution control systems.

When one fan can’t afford the necessary flow and pressure, the fans must be run in series two or more, in order to achieve the goal. The pressure of the centrifugal fan is high, so it is widely used in the production and has high using frequency, the centrifugal fans in series are often applied in practical production. According to the relevant statistics, fan power consumption accounting for 12% of the total electricity consumption. It has a fan wheel composed of a number of fan blades, or ribs, mounted around a hub. As shown in Figure 1, the hub turns on a driveshaft that passes through the fan housing. The gas enters from the side of the fan wheel, turns 90 degrees and accelerates due to centrifugal force as it flows over the fan blades and exits the fan housing.

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Centrifugal Fans