FB3G190-24PY-90S Backward Curved Centrifugal Fan, 24VDC, 190mm, 941 m3/h

The FB3G190-24PY-90S is a performance-optimized PY-winding variant in the 190mm backward curved centrifugal fan series, delivering an elevated 941 m³/h (554 CFM) at 838 Pa from a 24VDC supply. Its BLDC92 brushless external rotor motor produces 170W at 4400 RPM, offering a distinct operating point between the standard PL variant and the highest-output configurations. The PY winding design optimizes the motor torque-speed curve for applications requiring a balance of high airflow and elevated static pressure capability. Operating on safe low-voltage 24VDC with a 16~28 VDC input range, it is suitable for telecom DC plants, solar-powered ventilation, battery-backed air handling, and mobile equipment cooling where high performance must be delivered from DC power. Equipped with 0-10VDC/PWM speed control and FG tachometer feedback (3 pulse/rev), the fan provides precision airflow regulation across its full operating range. CE, RoHS, ISO9001, ErP2026 certified with a 50,000-hour L10 bearing life for continuous-duty reliability.

The FB3G190-24PY-90S features the PY winding configuration of the BLDC92 external rotor motor, a design variant that adjusts the electromagnetic characteristics to achieve a refined speed-power operating point compared to the PL winding. At 4400 RPM, the motor draws 7.1A from a 24VDC supply to produce 170W of shaft power, driving the 7-blade backward curved impeller to generate 941 m³/h at 838 Pa. This represents a meaningful performance increment over baseline 190mm variants, particularly in static pressure capability, making it well-suited for systems with longer duct runs or higher filter resistance. The wide 16~28 VDC input accommodates both regulated 24V supplies and lead-acid battery banks during charge cycles. The die-cast aluminum housing provides structural rigidity and effective thermal dissipation. Ball bearings support any-angle mounting with a 50,000+ hour L10 service life at 40°C ambient. The integrated electronic controller provides a comprehensive protection suite: soft-start circuitry, active current limitation, under-voltage lockout, over-voltage shutdown, independent thermal overload sensors for both motor and electronics, locked-rotor detection, and reverse polarity protection. The FG tachometer output (3 pulse/rev) enables closed-loop speed verification. Compliant with CE, RoHS, ISO9001, ErP2026 and relevant international standards for electromagnetic compatibility, mechanical safety, and electrical equipment safety.

DC Backward Centrifugal Fan
Type	FB3G190-24PY-90S
Model	BLDC92

Remarks:

I. Standard cable length Refer to the figure below. The length of cable can be customized.

II. Conventional mode is 0-10V/PWM control. Modbus RTU over RS485 is available as an option. Please contact technical personnel for detailed Modbus485 protocol.

Test condition:

I. The test data is obtained under the specified environment conditions and installation mode.

II. Input Voltage---Operating voltage.

III. Temperature---Room temperature 25°C.

IV. Humidity---65%RH.

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. 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.

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

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

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

VIII. Please read this technical manual carefully before using it.

1. PY-Optimized Winding Performance: The FB3G190-24PY-90S features a purpose-designed PY winding in its BLDC92 motor that achieves an elevated 838 Pa static pressure at 941 m³/h, an optimized operating point for applications where system resistance is the primary design constraint. Drawing 7.1A at 24VDC for 170W output, it delivers more pressure capability per watt than standard winding configurations, making it the preferred choice for ducted systems with high filter loading, long distribution runs, or multi-branch air circuits where maintaining flow against significant back pressure is critical to system performance.

2. Precision Speed-Pressure Control: The 0-10VDC and PWM control inputs provide stepless speed regulation from 0 to 4400 RPM, enabling closed-loop pressure and flow control strategies. The FG tachometer output (3 pulse/rev) delivers real-time speed feedback for verification and system diagnostics. The wide 16~28 VDC input range ensures stable operation even as battery voltages fluctuate, making it reliable for off-grid and mobile installations where power quality cannot be guaranteed.

3. Comprehensive Self-Protection: The onboard controller provides autonomous protection against common failure modes without requiring external monitoring. Soft-start limits inrush current during power-up. Active current limitation protects windings under overload. Under/over voltage detection prevents operation outside the safe 16~28 VDC window. Dual thermal overload sensors independently monitor motor and electronics temperatures. Locked-rotor protection cuts power if the impeller is mechanically obstructed. Reverse polarity protection prevents damage from field wiring errors, particularly valuable in DC systems where polarity mistakes are a common risk.

4. Certified for Global Deployment: The fan carries CE, RoHS, ISO9001, ErP2026 certifications and complies with European EMC standards (EN 61000-6-1/6-3), power quality standards (EN 61000-3-2/3-3), mechanical safety (EN ISO 12100), and electrical equipment safety (EN 60204-1). The IP44-rated die-cast aluminum housing protects internal components from dust and water splashes. Ball bearings rated for 50,000+ hours L10 life ensure minimal maintenance over the operational lifetime. The -25°C to 60°C ambient operating range supports both indoor equipment rooms and outdoor enclosure deployments.

5. Flexible Integration and Support: The 190mm form factor with standard mounting flange enables straightforward integration into new designs or as a performance upgrade for existing equipment. The FG tachometer output (3 pulse/rev) enables speed monitoring without additional sensors. OEM and ODM services are available for custom voltage setpoints, connector types, cable lengths, and communication protocols including Modbus RTU over RS485. Standard samples ship within 7 days for evaluation, with full production lead times of 14-21 days for volume orders.

Q1: What kind of payments do you support?

A1: We support T/T (30% deposit, 70% before shipment) and Trade Assurance. L/C is also available for large orders.

Q2: Will you provide samples?

A2: Yes. Standard models ship within 7 days. Custom configurations (voltage, connector, cable length, control protocol) require 2-4 weeks.

Q3: How can I choose a more suitable model?

A3: Send us your target airflow (m³/h or CFM), static pressure (Pa), operating voltage, and any special requirements. Our engineering team will provide a performance curve and quotation within 24 hours.

Q4: How can I place the order?

A4: Inquiry to Quotation (within 24 hours) to Proforma Invoice to Deposit Payment (30%) to Production (14-21 days standard) to Balance Payment (70%) to Shipment with tracking number. We provide production status updates throughout the process.

Q5: About transportation

A5: All available shipping methods can be applied: Express courier (3-5 days), Air freight (3-7 days), Sea freight (15-40 days). You may appoint your preferred shipping company or use our forwarders. We support EXW, FOB, CIF, DAP, and DDP terms. Full-way cargo tracking is provided until delivery.

Q6: What certifications do your fans have?

A6: Our fans are CE, RoHS, TUV, and ISO 9001 certified. UL certification is available upon request. All fans are tested in our Suzhou facility before shipment. We currently offer a 3-year quality guarantee for our own products, with factory line support for technical inquiries and product optimization.