Centrifugal Fan Types

In a centrifugal fan, air enters the impeller along the axial direction (perpendicular to the impeller surface) and is discharged tangentially from it. Besides the shape of the volute casing, one of the most influential factors in this process is the blade angle. Based on this, centrifugal fans are generally divided into three main categories:

• Forward-curved – where the blades curve in the direction of rotation
• Backward-curved – where the blades curve opposite to the direction of rotation
• Radial – featuring straight blades aligned along the impeller radius

An essential aspect of all rotating equipment, including centrifugal fans, is static and dynamic balancing. Proper balancing not only improves performance but also helps prevent vibration, resulting in lower noise levels and extended service life.