Home / Products / Centrifugal Fans / Backward Centrifugal Fan / DC 24V 85W 250mm Silent External Rotor Ventilation Backward Centrifugal Blower Fan for Household Air Purification

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DC 24V 85W 250mm Silent External Rotor Ventilation Backward Centrifugal Blower Fan for Household Air Purification

1. 250mm
2. IP44 protection level
3. Aluminum alloy motor with Propylene with glass-fiber reinforced impeller, fashion design.
4. Using Ball bearing, working life more than 50,000 hours
Availability:
Quantity:
  • FB3G250-24PL-90

  • Fanova

Nominal Voltage

VDC

24

Nominal voltage range

VDC

16~28

Current draw

A

3.5±10%

Speed(RPM)

min-1

2150±5%

Power consumption

W

85±10%

Sound Pressure Level

dB(A

66±5%

Max. Air Flow

CFM / m3/H

666.18/1132

Max. Static Pressure

In.wg /Pa

 2.032/508

Insulation class

~

 Class B

Degree of protection

~

IP44

Control Input

~

0~10VDC / PWM

Signal Output

~

FG (Tach output )

Product Overview

The FB3G250-24PL-90 is a high-volume 24V DC centrifugal blower engineered for large-scale thermal management. Featuring a 250mm glass-fiber-reinforced impeller and robust BLDC92 motor, it delivers exceptional airflow for industrial ventilation, cooling systems, and heavy-duty exhaust applications where space allows.


Core Features

  1. Massive Airflow Capacity
    Moves 1,132 m³/h (666 CFM) – ideal for high-volume cooling in large enclosures, ducted systems, or industrial exhausts.

  2. Wide Voltage Tolerance
    Operates reliably at 16–28VDC (±33% range), ensuring stability in fluctuating power environments (e.g., mobile equipment).

  3. High-Resolution Monitoring
    FG tach output delivers 4 pulses/revolution (white wire) for precise RPM tracking and early fault detection.

  4. Heavy-Duty Endurance
    Ball bearings, IP44 sealing, and 50k-hour lifespan withstand continuous operation in factories, workshops, or dusty settings.


Applications

  • Large Industrial Cabinets: Cooling high-density server racks, power distribution units (PDUs), and CNC machinery control panels.

  • HVAC & Ventilation: High-capacity air handlers, warehouse exhaust systems, industrial dryer cooling.

  • Process Cooling: Fume extraction in welding/painting bays, plastic injection molding machine ventilation.

  • Renewable Energy: Thermal management for wind turbine converters or large solar inverter banks.

  • Agriculture/Tech: Greenhouse airflow systems, data center hot-aisle containment.


FAQ

  1. Q: What makes this fan suitable for unstable power sources?
    A: Its 16–28VDC range (±33%) compensates for voltage drops in generators, batteries, or long cable runs.

  2. Q: How does the tach signal help maintenance?
    A: The 4-pulse/rev FG output (white wire) provides finer RPM resolution for predictive diagnostics.

  3. Q: Can it handle corrosive environments?
    A: While IP44-rated against dust/splashes, chemically aggressive settings require custom housing.


FB3G250-24PL-90-斜口塑料风轮-85W-后向-2D图纸-模型_00

FB3G250-24PL-90-斜口塑料风轮-85W-后向-PQ曲线-模型_00

Life Expectance

50,000 Hours(L10),At 40℃ room, humidity 15%~65%RH

Technical features

Motor current limitation

Soft starting Protection

Under/Over voltage detection

Thermal overload protection for electronics/motor

Line undervoltage detection

Locked-rotor Protection

Reverse Polarity Protection


Operating Temperature

Fan

-25℃ (Min. )~60℃ (Max. )

Heat sink of IC

115℃ (Max. )

Other electronic parts

85℃ (Max. )

Ball bearing

80℃ (Max. )

Lead Wire

120℃ (Max. )

Storage Temperature

-40℃ to 75℃

Operating Humidity

5% to 90% RH

Storage Humidity

5% to 95% RH


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 +86-512-66152110
 +86-18168737096
 +8617715518438
 +8617715518438
 No.739, Fuyuan Road, Xiangcheng District, Suzhou, Jiangsu, P.R. China 215133

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+86-512-66152110
+86-17715518438
Sales01@fanova-tech.com
+8617715518438
+8617715518438
No.739, Fuyuan Road, Xiangcheng District, Suzhou, Jiangsu, P.R. China 215133
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