FB3G310-48AL-90 Backward Curved Centrifugal Fan, 48VDC, 310mm, 2458 m3/h

The FB3G310-48AL-90 is engineered to consolidate multiple smaller blowers into a single, high-capacity air moving solution, delivering a maximum airflow of 2458 m3/h that redefines efficiency for space-constrained ventilation systems. Operating on a 48VDC power platform with a wide 36~57V input window, this model aligns perfectly with telecom-standard -48VDC infrastructure, enabling seamless DCIM integration and reducing power conversion losses. At 1750 RPM, the 310mm die-cast aluminum impeller generates a robust static pressure of 426 Pa, making it suitable for ducted applications with moderate resistance. The unit consumes a modest 145.2W at full speed while producing a noise level of 66.4 dB(A), balancing performance with acoustic comfort for equipment rooms. This backward-curved centrifugal fan is driven by a BLDCDC92 brushless DC motor, which offers superior energy efficiency and long operational life compared to AC alternatives. Speed control can be achieved via PWM or 0-10V analog signals, providing flexibility for variable air volume systems and smart building controls. The aluminum construction of both the impeller and housing ensures excellent heat dissipation and corrosion resistance, ideal for continuous duty in telecom cabinets, cleanrooms, and industrial OEM equipment. Certified to CE and RoHS standards, the FB3G310-48AL-90 is a reliable choice for global OEMs seeking a rugged, high-performance fan with a compact footprint. FANOVA offers this model with customizable cable lengths and connectors, making it a versatile drop-in solution for new designs or retrofit projects.

The FB3G310-48AL-90 represents a paradigm shift in high-volume air delivery, combining a large 310mm impeller with a high-efficiency 48V brushless DC motor to achieve a remarkable airflow-to-footprint ratio. The impeller is precision die-cast from aluminum alloy, featuring a backward-curved blade profile with a specific blade count optimized for aerodynamic efficiency and low turbulence. This design not only maximizes static pressure generation but also minimizes noise at the target operating point, a critical factor for HVAC and precision cooling applications. The housing or endcap is likewise fabricated from die-cast aluminum, providing a rigid, lightweight structure that effectively dissipates motor heat and supports the rotor assembly with minimal vibration. The motor, designated BLDCDC92, is a sensorless brushless DC unit with a rotor diameter of 92mm, engineered for high torque density and smooth, cog-free rotation. It operates over a broad voltage range of 36 to 57VDC, with a nominal rating of 48VDC, drawing a maximum current of 3.025A and consuming 145.2W at 1750 RPM. Speed control is implemented through a flexible interface that accepts either a PWM signal (frequency range 1kHz to 10kHz) or a 0-10V analog voltage, allowing integration with a wide array of building management systems and custom controllers. The motor includes built-in electronic protections against overcurrent, overvoltage, undervoltage, and locked-rotor conditions, ensuring fail-safe operation in demanding environments. Insulation class B is standard, and the fan is rated for a wide ambient temperature range, making it suitable for both indoor and sheltered outdoor installations. The bearing system employs dual ball bearings with a design life exceeding 50,000 hours at 40 degrees Celsius, providing long-term reliability with minimal maintenance. Electrical connectivity is provided via a 20AWG cable with a standard length of 150mm, terminated with bare leads or optional connectors, and the cable is rated for high-flex applications. The fan meets CE and RoHS compliance, and production is ISO9001 certified, guaranteeing consistent quality. This model is particularly suited for telecom base stations, data center cooling units, battery energy storage systems, and high-end commercial ventilation equipment, where its 48V DC compatibility, high airflow, and robust aluminum construction deliver a competitive edge.

DC Backward Curved Centrifugal Fan
Type	FB3G310-48AL-90
Model	BLDCDC92

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-90 delivers 2458 m3/h at 426 Pa while drawing only 145.2W, 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.