Centrifugal fans can be classified into the following categories based on their structure and application characteristics:
Forward-curved multi-blade centrifugal fans: The blades are designed with a forward curve (typically 30°-45°), featuring high air volume and low air pressure (static pressure generally <1000Pa), suitable for ventilation, air conditioning systems, and other applications. For more product parameters of the above-mentioned products, please click below. Their impellers typically consist of 36-64 thin steel plate stamped blades, with a speed range of 800-3000rpm.
Backward-curved plate centrifugal fans: The blades are tilted backward (typically 40°-60°), achieving an efficiency of over 85%. Under medium- and high-pressure conditions (static pressure 1000-5000Pa), energy consumption is 15%-20% lower than forward-curved fans. Commonly used in industrial dust removal and boiler induced draft systems. It is important to avoid long-term use in environments with dust concentrations >150mg/m³.
Radial centrifugal fans: The blades are radially straight plates, with a robust and wear-resistant structure. Suitable for conveying gases containing particulate matter (such as sawdust and grains). Operating temperature is typically ≤250℃, with special ceramic-coated models capable of withstanding temperatures up to 450℃.
High-pressure centrifugal fans: Employ a multi-stage impeller series design (usually 2-4 stages), with outlet pressures exceeding 15kPa. Used in wastewater treatment aeration, pneumatic conveying, and other fields. During operation, the lubrication system oil temperature must be maintained between 40-60℃.
Explosion-proof centrifugal fans: Certified by ATEX or GB3836, using copper alloy impellers/aluminum alloy casings to eliminate static electricity. Suitable for explosive environments such as petroleum and chemical industries. The gas concentration must always be below 50% of the lower explosive limit (LEL).
When selecting a model, a comprehensive evaluation of three core parameters is necessary: airflow (m³/h), total pressure (Pa), and media characteristics (temperature, corrosiveness, particle content). It is recommended to determine the optimal operating point using performance curves.
