The centrifugal fan listed here carries voltage 3~380V/400V, blade material Cast Iron, documented exactly as the manufacturer publishes it. Made by Zhongshan Pengfei Electrical Appliance Co., Ltd. (8 years on the platform, factory-assessed). For a binding price and lead time, send the volume you need and where it ships to.
Key Features of This Centrifugal Fan
- Model Number: DYWF.B4T-500-245SB10, DEC137-B500
- Voltage: 3~380V/400V
- Blade Material: Cast Iron
- Warranty: 1 Year
- Certification: ce
- Place Of Origin: Guangdong, China
Technical Specifications
| Mounting | Duct Fan |
|---|---|
| Voltage | 3~380V/400V |
| Blade Material | Cast Iron |
| Electric Current Type | AC |
| Warranty | 1 Year |
| After-Sales Service Provided | Online support |
| Place Of Origin | Guangdong, China |
| Brand Name | Dailor |
| Model Number | DYWF.B4T-500-245SB10, DEC137-B500 |
| Type | Mounting, Centrifugal Fan |
| Size | 133mm-560mm |
| Motor Type | AC/EC/DC |
| Impeller | Plastic/Metal |
| Bearing Type | Maintenance-Free Ball Bearings |
| Phase | Single Phase/Three Phase |
| Packing Ways | Foam/Carton |
| Keyword | Centrifigal Fan |
| Certification | ce |
| Applicable Industries | Building Material Shops, Manufacturing Plant, Construction works , Energy & Mining |
| Packaging Details | 1. 10-20pcs per carton, it’s based on the model you need. 2. Foam packing or with inner box, it’s based on customers requirement. |
| Port Of Dispatch | Xiaolan Port or Zhongshan Port |
| Selling Units | Single item |
| Single Volume | 0 cm³ |
| Single Gross Weight | 0.0 kg |
| Supply Ability | 200000 pieces per Month |
Product Details




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Φ500mm AC External Rotor Motor Powered Backward Curved Centrifugal Fan | ||||||||||||||||
Model | Nominal Voltage (V) | Frequency (Hz) | Current (A) | Input Power (W) | Speed (RPM) | Capacitor (μF) | Airflow m³/h/CFM | Noise (dB) | ||||||||
DYWF.B4T-500-245SB10 | 380/400 | 50 | 2.50 | 1100 | 1400 | / | 8000/4705 | 78 | ||||||||
380/400 | 50 | 1.80 | 1000 | 1200 | / | 7000/4117 | 76 | |||||||||
Material of Impeller | Aluminum Alloy | |||||||||||||||
Material of Rotor | Aluminum casting | |||||||||||||||
Protection Class | IP54 | |||||||||||||||
Insulation Class | F | |||||||||||||||
Bearing System | Maintenance-free ball bearing | |||||||||||||||
Operating Temperature | -30℃ to +60℃ | |||||||||||||||


Φ500mm EC DC External Rotor Motor Powered Backward Curved Centrifugal Fan | ||||||||||||||
Model | Nominal Voltage (V) | Frequency (Hz) | Current (A) | Input Power (W) | Speed (RPM) | Noise (dB) | Applicable Temp. (℃) | |||||||
DEC137-B500 | 3~380 | 50/60 | 1.7 | 820 | 1560 | 74 | -20 ~ +60 | |||||||
Material of Impeller | Steel Sheet/Aluminum Alloy | |||||||||||||
Material of Rotor | Aluminum casting | |||||||||||||
Protection Class | IP54 | |||||||||||||
Insulation Class | B | |||||||||||||
Bearing System | Maintenance-free ball bearing | |||||||||||||
Wire Diagram | Contact us for details | |||||||||||||


NO. | Speed (RPM) | Input Power (W) |
1 | 1298 | 847.3 |
2 | 1265 | 1046.8 |
3 | 1199 | 1005.2 |
4 | 1288 | 1063.9 |
5 | 1081 | 527.7 |
6 | 1079 | 660.6 |
7 | 1079 | 712.0 |
8 | 1080 | 678.3 |
Mechanical Parameter (only for EC/DC, not suitable for AC motor fan): | ||
Life Expectance | 50,000Hours(L10) At 40℃ room, humidity 15%~65%RH. | |
Direction of Rotation | Anti-clockwise | |
Direction of Air flow | All around | |
Insulation Class | B/F | |
Bearing | Maintenance-free ball bearing | |
Locked rotor protection; Reverse Polarity protection; Automatic restart capability. | ||
Speed Control | PWM/0-10V Input | |
Protection Type | IP44/IP54 | |
Operating Temperature | -20℃ to +60℃ | |
Voltage Output | +10VDC (Can be used as speed control input voltage or FG signal pull-up voltage,and need to be circumscribed in series with a pull–up resister, details as connection diagram.) | |
Signal Output | FG (Frequency Generator) | |










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A: Don't worry. We have hundreds of fans. Send us messages, we will recommend the right one to you.
2.Q: How about the delivery time?
A: Generally, ready to ship order will be shipped in 15 days after payment.
3.Q:What is your main market?
A: We have UL, CE certificate, North America, Europe are our main market we also have client in Southeast Asia, South America, Africa and so on.
4.Q: Can I have samples for testing before ordering products?
A:Yes, we sincerely suggest that customers should have some samples of required fans for testing because the truly performance of fans can be fully demonstrated after testing is conducted.
More info about samples and fans, send us message below.
5.Q: What is your QC procedure?
A: We have a strict QC system.
Before manufacturing, all raw material will be QC sampled.
During manufacturing, when each part is finished, it will be QC sampled. We will assemble samples before mass assembling.
After manufacturing, all finished fans will be QC tested.
Send us messages to get more information and catalog.


Ordering and Pricing
- Minimum order quantity: 5 piece
- Volume pricing:
- 5–99 piece: US $477.5 / piece
- 100+ piece: US $380 / piece
- Ships from: China
- Customization: OEM and ODM accepted on qualifying volumes.
Frequently Asked Questions
What is the minimum order quantity for this centrifugal fan?
The standard minimum order quantity is 5 piece. Trial orders can usually be arranged for buyers evaluating the product before a full production run.
What warranty is provided?
The manufacturer provides a 1 Year warranty. Spare parts and technical support remain available after the warranty period.
Which certifications does this centrifugal fan carry?
It is supplied with ce documentation, which covers the requirements of most import markets. Additional test reports can be issued on request.
Can the centrifugal fan be supplied for my local voltage?
The standard configuration is 3~380V/400V. Alternative voltage and frequency builds are available when specified at the time of order.
Do you accept OEM or custom branding?
Yes. Custom logo, colour, packaging and specification changes are accepted on qualifying order volumes. Send your artwork and technical requirements with your enquiry.
How long does production and delivery take?
In-stock configurations typically ship within 7–15 days. Customised or large-volume orders are usually produced in 25–35 days, confirmed on order.
About the Manufacturer
This product is produced by Zhongshan Pengfei Electrical Appliance Co., Ltd., based in China. The company 8 years as a verified Alibaba.com supplier, operates its own manufacturing, passed third-party supplier assessment. Browse the full Zhongshan Pengfei Electrical Appliance Co., Ltd. range on HVACR Nexus.
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