FB3G280-80AL-20 Backward Curved Centrifugal Fan, 80VDC, 280mm, 2575.8 m3/h

When your ventilation system demands heavy-duty airflow through long ducts and high-resistance filters, the FANOVA FB3G280-80AL-20 backward centrifugal fan delivers an uncompromising combination of volume and pressure. This high-power 80 VDC unit generates a maximum airflow of 2575.8 m3/h and a static pressure of 729 Pa, making it ideal for industrial exhaust, HVAC boosting, and cleanroom applications where single-fan solutions replace multiple smaller units. The 280 mm die-cast aluminum impeller is engineered for low-speed, high-efficiency operation, reducing noise to 81 dB(A) while maintaining robust performance. Powered by the BLDCDC102 brushless DC motor, this fan operates across a wide voltage range of 60-143 VDC with a nominal current of 4.5 A and power consumption of 360 W. Its variable speed control interface allows precise airflow modulation, while the aluminum housing and impeller ensure durability in demanding environments. With sealed ball bearings rated for long service life and IP55 protection, the FB3G280-80AL-20 is built for continuous industrial duty. Backed by CE and RoHS certifications, this FANOVA model is the go-to choice for OEMs and system integrators seeking a reliable, high-pressure centrifugal fan for new energy, HVAC, and industrial ventilation projects.

The FB3G280-80AL-20 is a backward-curved centrifugal fan engineered for high-static-pressure, high-volume applications. At its core is a 280 mm impeller fabricated from die-cast aluminum alloy, featuring backward-curved blades that optimize aerodynamic efficiency and reduce turbulence. This design enables the fan to achieve a maximum airflow of 2575.8 m3/h (1515.9 CFM) and a maximum static pressure of 729 Pa (2.92 in.wg) at a rated speed of 2600 RPM. The impeller's large diameter allows for lower rotational speeds to move equivalent air volumes, contributing to quieter operation and extended bearing life.

The fan is driven by a BLDCDC102 brushless DC motor, a high-efficiency electronically commutated motor that provides superior speed control and energy savings compared to traditional AC motors. The motor operates on a nominal 80 VDC supply with a usable voltage range of 60 to 143 VDC, accommodating various DC bus architectures in industrial microgrids and battery systems. At full load, the motor draws 4.5 A and consumes 360 W, delivering a power-to-airflow ratio that is competitive in its class. The motor is equipped with hall-effect sensors and a dedicated driver circuit that enables PWM speed control, allowing the system to modulate airflow precisely based on real-time demand. This control interface is compatible with standard 0-10 V analog signals or PWM inputs, facilitating integration with building management systems (BMS) and industrial controllers.

Mechanically, the fan features a die-cast aluminum endcap and housing, providing rigidity and corrosion resistance suitable for industrial environments. The rotor diameter is 102 mm, and the motor is mounted with sealed ball bearings that have a design life exceeding 50,000 hours at rated operating conditions. The fan is rated IP55, offering protection against dust ingress and water jets, making it suitable for outdoor or washdown installations. The electrical interface consists of a 20 AWG cable with a length of 150 mm, terminated for easy connection to the motor driver; custom cable lengths and connectors are available upon request.

The FB3G280-80AL-20 is designed for continuous duty and includes thermal overload protection and reverse polarity protection in the motor electronics. The aluminum construction ensures low weight while maintaining structural integrity. The fan complies with CE and RoHS directives, and FANOVA's ISO9001-certified manufacturing process ensures consistent quality. With its high static pressure capability, this fan is particularly suited for applications requiring long duct runs, high-efficiency particulate air (HEPA) filters, and multi-outlet distribution systems. Whether used in HVAC air handling units, industrial process ventilation, or energy storage thermal management, the FB3G280-80AL-20 delivers reliable, high-performance airflow that meets the demands of modern engineering specifications.

DC Backward Curved Centrifugal Fan
Type	FB3G280-80AL-20
Model	BLDCDC102

Ⅰ.When taking out the fan, do not directly lift the fan lead wire. If the lead wire is excessively stressed, the internal welding part may fall off

Ⅱ.Do not plug or unplug the fan lead plug when the fan is running

Ⅲ.If the fan does not work after starting, do not touch the impeller, rotor, or other parts, professional technical personnel are required to inspect the fan to prevent sudden start of the fan from causing hand or other personal injury

Ⅳ.The power line and control line of the fan cannot be connected in reverse, otherwise it will burn out

Ⅴ.Because of the soft start characteristics of the fan, to prevent personal injury, do not touch the impeller or other parts of the fan during powered on or running at low speeds

Ⅵ.The fan needs to be operated and used under the guidance of professional personnel to prevent children from coming into touch this product

Ⅶ.If the power line is worn or damaged, it needs to be returned to the manufacturer for repair or be replaced under the guidance of the manufacturer

Ⅷ.As a part of the fan, it is not recommended to use the motor alone when there is no impeller or loading

1. High Efficiency: The FB3G280-80AL-20 delivers 2575.8 m3/h at 729 Pa while drawing only 360W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.

2. Industrial-Grade Impeller: The 280mm galvanized steel sheet impeller resists corrosion, wear and high temperatures, making the fan suitable for harsh industrial environments and corrosive gas streams.

3. Wide Application Range: Suitable for industrial ventilation, dust extraction, HVAC units, agricultural ventilation and new-energy equipment, offering flexible customized solutions (OEM/ODM).

4. Sustainable Development: Low-voltage DC operation enables direct solar and battery integration; recyclable steel impeller and optimized BLDC drive meet eco-friendly requirements with long-term reliability.

5. Easy Installation and Maintenance: Compact 280mm footprint, 0-10VDC/PWM speed control, FG tach output and standard cable make the fan simple to wire, control and service.

Q1:What kind of payments do you support?

A1: For sample order, 100% payment in advance; For batch order, 30% in advance and 70% will be paid before shipping

Q2.Will you provide samples?

A2: Sample is available and can be delivered within 10days

Q3:How can I choose a more suitable model?

A3: We need the information like fan type, quantity, size, material, voltage, air flow and static pressure.

Q4:How can I place the order?

A4:  Usually quote you within 24 hours  after  we get your inquiry. First sign the PI,pay deposit,then we will arrange the production.After finished production need you pay balance. Finally we will ship the Goods.

Q5:About transportation

A5: All available shipping ways could be applied, express shipping, air or sea. Appointed shipping company or our own forwarders all could be used in shipment. Full-way tracking the cargos for you before the goods arrive. 

Q6:How long is the warranty period?

A6: We currently offer 3-year quality guarantee for our own products, and in response to current product problems, our company provides line support, and some customers have been able to improve their products.