Different Types Of Centrifugal Fans, Many Applications

Centrifugal fans have become increasingly important on an industrial level. Renowned for their efficient technological system and versatility, nowadays is an ideal solution for specific applications.


In this article, we will discuss:


The 4 Main Types Of Centrifugal Fans  


There are four main types of centrifugal fans with different features that make them suitable for different uses and industries.

Forward-Curved Centrifugal Fan

A forward-curved centrifugal fan is characterised by compactness


This type of centrifugal fan is suitable for applications where large volumes of air need to be moved at low pressure. 


As the motors can easily overload in case of higher airflow and in a low-pressure environment, it is important to know that this centrifugal fan requires an increased amount of air

Backward-Curved Centrifugal Fan

In these centrifugal fans, the impeller could present fewer and longer blades. From the inner to the outer edge, blades are curved backwards, influencing the direction of the rotation. The resulting flow produced goes in a radial direction. Air is pushed out, generating negative pressure on the reverse side of the blade. 


Furthermore, the impellers of these fans can be used with or without a fan scroll due to the nature of their static pressure. This type of fan is energy-efficient, consuming less power thanks to a reliable motor that only peaks in power demand at the middle of its performance.

They usually work swiftly in high pressure environments
, and maintain low noise-levels. For this reason, backward-curved centrifugal fans are particularly suitable in air management, and dust collection operations in industrial contexts.

Radial Centrifugal Fan

In this blower model, air enters the fan with a 90-degree angled position. The flat shape of blades speeds up the rotation, expelling air radially. For this type of fan, a scroll is imperative as it gives the right direction to the flow, transforming airflow into static pressure


Radial blowers can be used for material handling, and pollution control as they work best in environments where air contains small or large particles and fibres

Aerofoil Centrifugal Fan

Aerofoil centrifugal fans are designed with aerodynamic blades. They are highly efficient in environments from low to moderate pressures. These fans are more suitable for clean air handling systems.

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The Influence Of Blades In Air And Pressure Management

Every type of centrifugal fan features blades designed to manage air without altering its quality and deal with different pressure contexts. The shape, length, width and diameter of the blades have an impact on the overall performance of the blower


Let’s have a look at the main blade characteristics.

  • Forward-curved blades are not particularly long. They are curved in the direction of the impeller, so that large volumes of air at lower pressures are expelled from the fan in a tangential direction. 

  • Backward-curved fan blades are fewer, longer, and they have a larger diameter compared to the forward-curved model. This type of blower is more efficient in high-pressure and fast-paced applications.

  • Radial blower blades are straight and extended outwards. They can manage particulate-laden airstreams

  • Aerofoil centrifugal fans display aerodynamic blades with a shape similar to an aircraft wing.

How To Install A Centrifugal Fan For Optimised Performance 

A perfect installation and following specific maintenance guidelines are key elements for the excellent performance of every type of centrifugal fan over the years.


First and foremost, the installation site is fundamental to guarantee the accessibility and maintenance of the blower.


Once chosen the right spot, the centrifugal fan should be mounted to avoid vibrations. In some cases, centrifugal fans can be bracketed with dampers.


Furthermore, it is important to consider that pressure losses can affect the overall performance of the fan, impeding a correct air suction and discharge. 


A correct ductwork to maintain the right airflow and pressure matched with good electrical connections, wires and controls are instrumental for the safe operation of the blower.


Naturally, regular maintenance will help you monitor performance and technical statistics. As a matter of fact, it is important to check for wear, ensure the cleaning of the blades and the correct functioning of each component.


Predictive maintenance must be performed, as well, with the right tools to ensure the mechanics and aerodynamics of different types of centrifugal fans operate properly. The CBI Group Service Division is committed to provide on-site and remote assistance, guaranteeing the perfect functioning of your ventilation equipment at all times.

Choose CBI Group For Your Next Centrifugal Fan

Selecting the type of centrifugal fan that best meets your needs combining both performance and durability can be challenging. This is why CBI Group is committed to deliver high-quality, and customised products


CBI Group is a leading company specialised in designing, engineering and manufacturing unique solutions aligned with the requirements of the applications, capable of seamlessly integrating into existing ventilation systems


Our products are state-of-the-art, advanced machines renowned for their solid structure and constant performance even under the most challenging conditions. The precision of each detail, the assessment and careful selection of the materials, the high level of customisation we provide to our customers become added values to every project. 


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