FB3G630-4AGL-30F Backward Curved Centrifugal Fan, 380VAC, 630mm, 16150 m3/h

The FB3G630-4AGL-30F is a heavy-duty backward curved centrifugal fan engineered for maximum airflow in demanding industrial and commercial ventilation systems. This model delivers a remarkable maximum airflow of 16,150 m³/h (9,504.3 CFM) while maintaining an efficient 950 W power consumption at 380 VAC. The large 630 mm cold-rolled steel impeller enables low-speed operation at 1,250 RPM, producing a quiet 70 dB(A) noise level that suits occupied spaces. Its high-power BLDC EC motor offers a wide voltage tolerance from 304 to 456 VAC, ensuring stable performance under fluctuating grid conditions. The fan features a die-cast aluminum housing and endcaps for superior structural integrity and corrosion resistance in harsh industrial environments. With 18AWG cabling of 1,000 mm length and complete protection features, this unit is ready for plug-and-play integration into new or retrofit HVAC systems. Applications include industrial process ventilation, large-area air handling units, cleanrooms, and agricultural climate control. The FB3G630-4AGL-30F carries full CE and RoHS certifications, delivering dependable operation backed by FANOVA's rigorous quality standards.

The FB3G630-4AGL-30F is a robust backward curved centrifugal fan designed to move exceptionally large volumes of air with minimal noise and energy consumption. At its core is a 630 mm diameter impeller fabricated from high-strength cold-rolled steel sheet, precision-balanced to ensure vibration-free rotation at speeds up to 1,250 RPM. The impeller's backward curved blades optimize aerodynamic efficiency, converting motor torque into usable airflow with minimal turbulence, enabling a peak airflow of 16,150 m³/h. The fan is driven by a BLDC EC motor with a rotor diameter of 138 mm, a high-efficiency permanent-magnet synchronous design that delivers 950 W of mechanical power while consuming just 1.65 A from a 380 VAC supply. The motor's electronic commutation eliminates brush wear and sparking, extending service life to over 50,000 hours under normal operating conditions. Integrated variable speed control allows seamless modulation of airflow from 20% to 100% of rated capacity, using either a 0-10 V analog signal or PWM input, making the fan compatible with modern building management systems (BMS) and smart HVAC controllers. The motor accepts a wide input voltage range of 304 to 456 VAC, providing resilience against brownouts and line fluctuations common in industrial plants. Thermal protection is built into the motor drive, automatically derating output or shutting down when winding temperature exceeds safe limits, complemented by a class F insulation system that withstands ambient temperatures up to 60°C. The fan housing and endcaps are precision die-cast from aluminum alloy, offering excellent dimensional stability and corrosion resistance even in humid or mildly chemical environments. The impeller's cold-rolled steel construction is coated with a protective finish that resists rust and abrasion, making the fan suitable for dusty applications such as grain handling, woodworking, and cement plants. Two high-quality sealed ball bearings support the motor shaft, each rated for a design life of 40,000 hours at maximum rated load, and are grease-packed for maintenance-free operation across a temperature range of -20°C to +70°C. The electrical interface consists of an 18AWG, 1000 mm long cable with color-coded leads for easy connection to three-phase power and control signals, and the terminal box is IP54 rated to prevent ingress of dust and water spray. The fan operates with a noise output of 70 dB(A) at full speed, a low figure for its airflow class, attributed to the large impeller diameter and optimized blade geometry that reduces tip-speed noise. Each unit undergoes a 100% factory test for airflow, pressure, current draw, and vibration levels, ensuring every fan matches published performance curves. The FB3G630-4AGL-30F is backed by FANOVA's ISO 9001:2015 quality management system and carries CE, RoHS, and REACH compliance certifications, confirming its safety and environmental suitability for global markets. With its combination of massive airflow, high efficiency, and industrial-grade durability, this fan is ideal for large-scale ventilation projects, tunnel booster systems, and high-capacity air handling units where reliability is non-negotiable.

AC Backward Curved Centrifugal Fan
Type	FB3G630-4AGL-30F
Model	BLDCEC138

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 FB3G630-4AGL-30F delivers 16150 m3/h at 440 Pa while drawing only 950W, achieving 30-40% energy savings over equivalent AC fans through FANOVA's BLDC motor technology.

2. Industrial-Grade Impeller: The 630mm 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 630mm 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.