FB3G310-48AL-20 Backward Curved Centrifugal Fan, 48VDC, 310mm, 2593 m3/h

When an HVAC enclosure demands the highest airflow density without sacrificing pressure capability, the FANOVA FB3G310-48AL-20 backward centrifugal fan delivers a compelling solution. This 48VDC model is engineered for mission-critical telecom and data center environments, producing a massive 2593 m3/h (1525.98 CFM) maximum airflow while generating up to 771 Pa (3.1 in.wg) of static pressure. The fan's 310mm die-cast aluminum impeller and 102mm rotor work together at 2300 RPM, drawing only 260W and 5.5A from a 36-57VDC input range—ideal for -48V DC power plants. Its high-pressure capability allows it to replace multiple smaller fans in long duct runs or high-resistance filter systems, reducing overall energy consumption and maintenance complexity. The BLDC motor offers variable speed control, PWM or 0-10V interfaces, and features overcurrent, overvoltage, and thermal protection for reliable operation. With a noise level of 72 dB(A), it balances performance with acoustic comfort for telecom shelters and industrial cabinets. The fan is IP55-rated, making it suitable for demanding environments, and its die-cast aluminum construction ensures long-term durability and corrosion resistance. Backed by CE certification and a design life exceeding 50,000 hours, this FANOVA fan is a robust choice for OEMs seeking high-performance ventilation in new energy, HVAC, and industrial applications.

The FANOVA FB3G310-48AL-20 is a high-performance backward centrifugal fan designed for applications requiring simultaneous high airflow and high static pressure, such as telecom base stations, data center cooling units, and industrial process ventilation. At its core is a 310mm diameter impeller precision-cast from aluminum alloy, featuring backward-curved blades that optimize aerodynamic efficiency and reduce turbulence. This blade design enables the fan to achieve a maximum airflow of 2593 m3/h (1525.98 CFM) and a maximum static pressure of 771 Pa (3.1 in.wg) at a rated speed of 2300 RPM. The impeller and housing are both constructed from die-cast aluminum, providing excellent structural rigidity, corrosion resistance, and thermal conductivity, which is critical for continuous-duty operation in harsh environments.

The fan is driven by a brushless DC motor (model BLDCDC102) with a rotor diameter of 102mm, designed for high efficiency and long service life. The motor operates on a 48VDC nominal voltage with a wide input range of 36-57VDC, making it directly compatible with standard -48V telecom power systems and DC microgrids. At full load, the fan draws 5.5A and consumes 260W, delivering substantial power for heavy-duty airflow tasks. Speed control is achieved through PWM or 0-10V analog signals, allowing precise modulation of airflow to match system demand and reduce energy consumption. The motor incorporates advanced protection features including overcurrent, overvoltage, undervoltage, and thermal overload protection, safeguarding both the fan and connected equipment.

Mechanically, the fan is equipped with dual ball bearings rated for over 50,000 hours of operation at 40°C ambient temperature, ensuring reliable performance in continuous-duty applications. The electrical interface consists of a 20AWG cable with a length of 120mm, which can be customized for OEM requirements. The fan achieves an IP55 protection rating, offering resistance to dust and water jets, and is suitable for outdoor or washdown environments. Noise emission is controlled at 72 dB(A) at the rated operating point, balancing acoustic comfort with high-pressure output.

Quality assurance is a cornerstone of FANOVA's manufacturing process. The FB3G310-48AL-20 is produced under ISO9001-certified facilities and complies with CE standards, ensuring safety and reliability. The die-cast aluminum construction undergoes rigorous testing to meet performance specifications. This fan is an excellent choice for OEMs integrating high-capacity ventilation into telecom cabinets, energy storage systems, or industrial equipment, where both airflow volume and static pressure are critical for system efficiency. FANOVA also offers custom configurations including different cable lengths, connectors, and control options to meet specific project requirements.

DC Backward Curved Centrifugal Fan
Type	FB3G310-48AL-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 FB3G310-48AL-20 delivers 2593 m3/h at 771 Pa while drawing only 260W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.

2. Industrial-Grade Impeller: The 310mm 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 310mm 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.