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133FLW AC Centrifugal Blower Fan | Industrial Centrifugal Fan 129.5mm
The Hongbo 133FLW AC centrifugal blower fan is an industrial-grade forward or backward curved blade fan designed for directed, high-pressure airflow in HVAC systems, equipment cooling, and industrial ventilation applications. Unlike axial fans, this centrifugal blower fan moves air perpendicular to the inlet, generating higher static pressure for effective performance in ducted or restricted airflow installations. It features a plastic PA6+25%GF impeller, IP44 protection, and insulation class F construction.
Key Features
- Centrifugal Airflow Design: Moves air at 90° to the inlet axis, producing higher static pressure than axial fans; suited for ducted systems and applications with airflow resistance.
- Plastic PA6+25%GF Impeller: High-strength polyamide impeller provides good chemical resistance and dimensional stability under sustained operation.
- IP44 Protection Rating: Protected against solid objects greater than 1mm and water splashing from any direction; suitable for semi-exposed industrial environments.
- Insulation Class F: Motor windings rated for continuous operation at elevated winding temperatures, supporting long-duty-cycle industrial applications.
- CQC, CE and ISO9001 Certified: Meets China Quality Certification, European CE requirements and ISO9001 for industrial electrical equipment.
- AC Power Operation: Operates on standard AC voltage; compatible with single-phase industrial power supplies.
- Compact Blower Format: Self-contained blower unit suitable for integration into equipment housings, duct connectors, and ventilation assemblies.
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Customization Options
Hongbo Motor supports OEM and ODM orders for this 133FLW AC centrifugal blower fan:
- Voltage: Multiple AC voltage options available; contact us for details
- Blade curve type: Forward curved or backward curved blade configuration
- Airflow direction: Clockwise or counterclockwise rotation available
- Lead wire: Length and connector type to specification
- Mounting: Outlet duct dimensions and flange configurations adaptable for OEM integration
- Packaging and labeling: Custom branding for volume OEM programs
Specifications
| Product Model |
Ingress Protection |
Insulation Rating |
Voltage (V) |
Frequency (Hz) |
Capacitance (μF) |
Performance | Air m³/h |
Static Pressure (Pa) |
Noises (dB(A)) |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Current (A) |
Power (W) |
Rotate Speed (r/min) |
|||||||||
| 133FLW2 | IP44 | F | 220 | 50/60 | 1.5 | 0.26 | 42 | 2750 | 220 | 170 | 57 |
| 133FLW3 | IP44 | F | 380 | 50/60 | – | 0.05 | 30 | 2750 | 220 | 170 | 57 |
Applications
This centrifugal blower fan 133FLW is widely used in:
- HVAC air handling units: Provides directed supply or exhaust airflow in duct sections and air recirculation assemblies in commercial and industrial buildings.
- Industrial equipment cooling: Channels cooling air through targeted pathways inside machinery, transformers, and power electronics enclosures.
- Electrical cabinet ventilation: Supplies pressurized air to enclosures where positive pressure is required to prevent dust or fume ingress.
- Refrigeration and heat exchanger systems: Drives airflow across evaporator or condenser coils in commercial refrigeration units.
- Laser and cutting equipment: Provides focused air jets for cutting area cooling and fume extraction.
- Medical and laboratory ventilation: Delivers precise, controllable airflow in clean room equipment and diagnostic instrument housings.
Why Choose Hongbo Motor
- Over 10 years of focused experience in industrial cooling fan manufacturing
- Products exported to 40+ countries across North America, South America, Europe, and Asia
- Stable production capacity with consistent lead times
- Strong OEM/ODM capability for volume and custom orders
- Reliable quality backed by international certifications
FAQs
When should I use a centrifugal fan instead of an axial fan?
Centrifugal fans are the preferred choice when airflow must overcome resistance — such as in ducted systems, filter assemblies, or equipment with restricted outlet paths. Axial fans are better suited for free-air or low-resistance applications.
What does the IP44 rating mean for this fan?
IP44 means the fan is protected against solid particles larger than 1mm and against water splashing from any direction. It is suitable for use in industrial environments where light moisture or dust exposure is possible.
What voltage options are available?
Available AC voltage configurations vary by model. Please contact our sales team with your power supply specification for the appropriate model recommendation.
Do you support OEM orders?
Yes. We support customization of voltage, blade type, rotation direction, lead wire, and packaging. Contact our sales team with your requirements.
What is the minimum order quantity?
MOQ varies by model and configuration. Please contact us directly for details.
Certifications and Quality Assurance
- CE Certification
- CQC Certification (China Quality Certification)
- RoHS Compliance
Manufactured and tested at Hongbo Motor’s 6,000 m² facility in Ningbo, China.
