The Industrial Centrifugal Blowers?

Fans, compressors and blowers are common engineering appliances used in a number of engineering applications in industrial setup. Their principle of operation is nearly the same to an extent that most people tend to confuse the three. Take for instance, the centrifugal blowers and centrifugal fans. The main distinguishing factors depend on the technique used to move air and the amount of pressure they can operate against. The table illustrates the key differences:

Equipment	Specific ratio	Pressure rise (mmWg)
Fans	Up to 1.11	1136
Blowers	1.11 to 1.20	1136 to 2066
Compressors	Above 1.20	–

These parameters are defined by various international standards such as the American Society of Mechanical Engineers (ASME). Normally, these standards are used to eliminate any incompatibility issue, which may arise during the installation process.

What should you know about industrial centrifugal blowers?

Blowers are known for their ability to achieve high pressures as compared to fans with the same horsepower. They can attain pressures of about 1.20kgcm^-2. In industries, they can be used to obtain negative pressure. The negative pressure systems are used in the industrial vacuum equipment.

This is an example of high temperature centrifugal blower

Ideally, the structural design of blowers resembles that of the centrifugal pumps as opposed to fans. Their impeller are gear driven and they rotate very fast. They can rotate for as high as 15,000 rpm. Broadly, they are classified as either single stage or multi-stage blowers. This depends on the number of turns air makes before it exits the system.

Quite a number of centrifugal blowers can operate against pressures between 0.35 and 0.70 kgcm². The pressure is not limited within this range. With proper design specifications, they can achieve higher pressure.

A common phenomenon with the centrifugal blowers is that, the airflow will tend to drop with an increase in the system pressure. This is a major setback, especially in the material conveying systems that depend the on steady air flow. This is the main reason why they are used in industrial applications that are not susceptible to clogging.

There is a wide range of centrifugal blowers designed for specific applications such as the high pressure or the higher temperature blowers. You can contact our sales team for more inquiries. Alternatively, you can access our product catalogue.