Centrifugal Fan

Product Specifications

Technical details and manufacturing context for Centrifugal Fan

Definition

A centrifugal fan is a key component within air circulation systems that generates airflow by accelerating air radially outward from the center of rotation using rotating impellers. It creates pressure differences to move air through ducts, ventilation systems, or industrial processes, providing controlled air movement for ventilation, cooling, heating, or material handling applications. The fan consists of an impeller with curved blades, a housing, and a drive motor. Air enters the impeller axially and is expelled radially at a higher pressure. The performance of a centrifugal fan is characterized by parameters such as air flow rate, static pressure, fan speed, motor power, voltage, frequency, operating temperature, ingress protection, impeller and housing materials, weight, noise level, and efficiency. These parameters are specified as reference ranges and must be verified for the specific model and application. For example, air flow rate ranges from 500 to 20000 m³/h, static pressure from 500 to 5000 Pa, fan speed from 960 to 2900 rpm, motor power from 0.75 to 75 kW, and operating temperature from -20 to +80 °C. Materials commonly used include galvanized steel, aluminum, stainless steel, and plastic polymers. The fan may be constructed with Q235 steel or 304 stainless steel for impeller and housing, depending on corrosion requirements. Ingress protection ratings range from IP54 to IP65. Efficiency typically ranges from 65% to 85%, and noise levels from 70 to 95 dB(A). These values are indicative and should be confirmed with the manufacturer or supplier for the intended duty. Standards such as ISO 5801, IEC 60034, IEC 60038, IEC 60529, ISO 13347, ISO 12759, GB/T 700, and GB/T 1220 are referenced for testing and verification. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

Centrifugal fans operate by drawing air into the center of a rotating impeller. The impeller's curved blades accelerate the air radially outward due to centrifugal force, converting kinetic energy into pressure energy. The air is then discharged through the fan housing at a higher pressure than the inlet, creating airflow through the connected system. The pressure difference generated moves air against system resistance, such as duct friction and fittings. The fan's performance depends on the impeller design, speed, and system characteristics. Proper selection requires matching the fan's flow and pressure capabilities to the system's demand curve. Operating outside the recommended range can lead to reduced efficiency, increased noise, or mechanical stress. Regular maintenance includes checking for bearing wear, impeller balance, and motor condition. Failure signs include excessive vibration, unusual noise, or reduced airflow. Always verify the fan's operating point against the manufacturer's performance data.

Common Materials

Galvanized steel, Aluminum, Stainless steel, Plastic polymers

Technical Parameters

Parameter	Typical range	Notes & selection driver
Air Flow Rate	500–20000 m³/h	Select based on system demand; higher flow requires larger fan.ISO 5801
Static Pressure	500–5000 Pa	Must overcome system resistance; insufficient pressure reduces airflow.ISO 5801
Fan Speed	960–2900 rpm	Affects flow and pressure; higher speed increases noise and wear.
Motor Power	0.75–75 kW	Match to required duty; undersizing causes overload.IEC 60034
Voltage	380 V AC ±10% V	Other voltages available; ensure compatibility with supply.IEC 60038
Frequency	50/60 Hz	Affects motor speed; must match regional grid.IEC 60038
Operating Temperature	-20–+80 °C	Exceeding range may damage bearings or motor insulation.
Ingress Protection	IP54–IP65	IP65 for dusty or wet environments; IP54 for general indoor.IEC 60529
Impeller Material	Q235 / 304 SS	304 SS for corrosive or hygienic applications.GB/T 700, GB/T 1220
Housing Material	Q235 / 304 SS	Coated steel for standard; stainless for corrosive.GB/T 700, GB/T 1220
Weight	50–500 kg	Affects installation and structural support.
Noise Level	70–95 dB(A)	Higher speeds and pressures increase noise; consider silencers.ISO 13347
Efficiency	65–85 %	Higher efficiency reduces energy cost; check at operating point.ISO 12759

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Impeller
Rotating component with blades that accelerates air radially outward

Material: Steel or aluminum alloy
Housing/Casing Part
Encloses the impeller and directs airflow through the discharge outlet

Material: Galvanized steel or plastic
Motor
Provides rotational power to drive the impeller

Material: Copper windings, steel housing
Shaft Part
Connects the motor to the impeller, transmitting rotational force

Material: Steel alloy
Bearings
Support the rotating shaft and reduce friction

Material: Steel with lubricated surfaces

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Air Circulation System

View system integration details

Manufacturers of Centrifugal Fan

8 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Hangzhou Airflow Electric Appliances Co.,Ltd (AFL)

Zhejiang, CN

Also makes: Exhaust Fan, Blower Fan, Centrifugal/Axial Fans