Centrifugal Fan Impeller

The impeller is the only part inside a centrifugal fan that performs actual mechanical work on the air. All other parts such as the housing, shaft, bearings and motor are only there to support the impeller. That's why it's called the heart of the centrifugal fan. When an impeller becomes worn, rusted or imbalanced then the performance, energy consumption and bearing life of the entire fan begin to decrease simultaneously. Properly specified Centrifugal Fan Impeller replacement restore the fan to its original duty point, eliminates vibrations from imbalances caused by corrosion or dirt buildup and extends service life without replacing the entire unit.

The type of blade is selected according to the type of application. Backward curved and airfoil impellers offer maximum efficiency of 80~90% and feature a non-overloading power curve. It is the ideal choice for clean air industrial process fans, AHU and HVAC systems. Radial-blade impellers offer durability over efficiency, which is effective in extracting abrasive dust, fibrous materials and high temperatures, where curved blades would trap dirt and waste it. Forward curved impellers are selected for compact, low-pressure HVAC applications. Its material is determined by the type of process: carbon steel for general use, SS304 and SS316L for corrosive chemical environments and heat-resistant alloy steel for temperatures up to 600°C. All Centrifugal Fan Impellers are dynamically balanced to ISO 21940-11 Grade G6.3 as standard with Grade G2.5 available for high-speed and API 673 critical process duties.