Best Fans Fan Designs By Industry – ID And FD
                     BEST FANS FAN DESIGNS BY INDUSTRY – ID 
AND FD
Neel Rao
Writes on Forced draft fan, and 
ID Fans and FD Fans from Reitz India
Induced and forced draft fans are crucial components in many industrial plants and 
factories. This article will elaborate on the details specific to the best ID and FD fan 
designs for various industries. For this purpose, key parameters such as dust load, 
gas temperature, and corrosion are taken into consideration.
•When we view a cement factory, the induced draft fan design has to be either 
backwardcurved or radial. The radial or backward-curved ID blowers in these plants 
are effective in handling hot gases and huge dust loads. Most of these blades are 
made with liners or materials that are wear-resistant.
•The FD fans used in these facilities generally have backward-curved blades. This 
design is essential for supplying clean air at just medium pressure. These fans 
enhance the overall operational efficiency as well.
The airfoil or backward-curved designs are commonly seen in induced draft fans related 
to power plants. In these plants, the blowers are required to withstand both high 
temperatures and exposure to sulfur oxides and nitrogen oxides. This is achieved when 
one of these two designs is chosen – backward-curved or airfoil. These efficient fan 
designs are very durable; they are usually used with systems like ESP (Electrostatic 
precipitators) and FGD (Flue Gas Desulfurization).
The forced draft fans used in power plants also follow the same design. These designs 
take in a huge amount of clean air from the outside atmosphere and supply it to the 
concerned system. Many of these designs come with variable frequency drives (VFDs).
When we see steel plants, ID fans normally have a radial design, which helps handle high 
temperatures and dust. Most of the blades of this design are foul-resistant; they are 
extremely rugged.
Similarly, the FD blowers in these facilities mostly come with a radial or backward-
curved design. These designs make sure that there are no hassles in handling hot air 
including particulate matter. The efficiency of these designs could be a bit lower 
when compared with other models, but their durability is unquestionable.
Backward-curved ID fans are preferred in glass plants due to their ability to handle 
high temperatures and flue gases. Many of these blades are made with ceramic 
coatings or special alloys. Likewise, forced draft fans are of the airfoil type. Airfoil 
blades are highly efficient at supplying the air required for the combustion process.
Let us now turn to facilities such as refineries and chemical factories. Here the ID 
fans have backward-curved blades that are highly resistant to corrosion. These 
blades are manufactured with special coatings or fiberglass-reinforced plastic 
Chemical factories and refineries use FD fans with airfoil or backward-curved blade. 
They supply clean air and exercise nice control of air pressure. Additionally, they 
produce very little noise.
Industrial fans and blade designs – Key points
These are a few key points about industrial fans and blade designs.
 
The casings and impellers of many industrial fan variants are made of carbon steel, 
stainless steel, or fiber-reinforced plastic.
Most blades come with special coatings with materials such as epoxy or ceramic. • 
Airfoil blades should be used only when the air is completely clean.
Radial blades are ideal when the gases are very noxious, while the backward curved 
designs find their usage when the gases are not too foul.
About REITZINDIA
Reitz India has set a benchmark to deliver high quality fans for heavy duty industries 
which can work at precise operating conditions like high temperatures and 
pressures. Reitz offer idealistic Centrifugal Fan and Centrifugal blower design that 
can be used in all large scale process industries like cement, iron & steel, power 
plants, fertilizers/ chemicals and more.
Thank you for spending your precious time in reading this article!