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China 4-72A Centrifugal Fan – High Airflow, Reliable Suppliers & Factory Direct Pricing for Industrial Ventilation
Parameters
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| Model | Speed (r/min) |
Power (kW-P) |
Traffic (m³/h) |
Total Pressure (Pa) |
Voltage (V) |
Frequency (Hz) |
Horsepower (HP) |
| 2.5A | 2900 | 0.75-2 | 800-1650 | 790-485 | 220/380 | 50 | 1 |
| 2.8A | 2900 | 1.5-2 | 1131-2356 | 994-606 | 220/380 | 50 | 2 |
| 3.2A | 2900 | 2.2-2 | 1688-3517 | 1300-792 | 220/380 | 50 | 3 |
| 1450 | 1.1-4 | 844-1758 | 324-198 | 220/380 | 50 | 1.5 | |
| 3.6A | 2900 | 3-2 | 2664-5268 | 1578-989 | 220/380 | 50 | 4 |
| 1450 | 1.1-4 | 1332-2634 | 393-247 | 220/380 | 50 | 1.5 | |
| 4A | 2900 | 5.5-2 | 4012-7419 | 2014-1320 | 380 | 50 | 7.5 |
| 1450 | 1.1-4 | 2006-3709 | 501-329 | 220/380 | 50 | 1.5 | |
| 4.5A | 2900 | 7.5-2 | 5712-10562 | 2554-1673 | 380 | 50 | 10 |
| 1450 | 1.1-4 | 2856-5281 | 634-416 | 220/380 | 50 | 1.5 | |
| 5A | 2900 | 15-2 | 7728-15455 | 3187-2019 | 380 | 50 | 20.5 |
| 1450 | 2.2-4 | 3864-7728 | 790-502 | 220/380 | 50 | 3 | |
| 5.6A | 2900 | 22-2 | 10122-25736 | 4152-2330 | 380 | 50 | 30 |
| 1450 | 3-4 | 7062-9885 | 957-759 | 220/380 | 50 | 4 | |
| 6A | 1450 | 4-4 | 6677-13353 | 1139-724 | 380 | 50 | 5.5 |
| 6.3A | 1450 | 5.5-4 | 10110-15810 | 1247-968 | 380 | 50 | 7.5 |
| 7.1A | 1450 | 11-4 | 12676-20513 | 1572-1168 | 380 | 50 | 15 |
| 960 | 3-6 | 8392-13581 | 689-512 | 380 | 50 | 4 |
Frequently Asked Questions
Q1
What is the difference between the 2900 r/min and 1450 r/min speed options for the same model?
The two speed options represent different operating modes for the same fan model. The 2900 r/min (high-speed) configuration delivers significantly higher airflow and total pressure, making it suitable for demanding ventilation applications. The 1450 r/min (low-speed) option consumes less power and operates more quietly, ideal for environments where moderate airflow and energy efficiency are priorities.
Q2
Which models support both 220V and 380V voltage inputs?
Models 2.5A through 5.6A (at 1450 r/min) support dual voltage input of 220V/380V, offering greater flexibility for installation in different electrical environments. Larger models such as 4A (at 2900 r/min), 4.5A, 5A, 5.6A (at 2900 r/min), 6A, 6.3A, and 7.1A operate exclusively on 380V, which is standard for higher-power industrial applications.
Q3
How do I select the right model based on airflow (Traffic) requirements?
To select the correct model, first calculate your required airflow in m³/h based on the volume of the space and the desired air change rate per hour. Then match your requirement to the Traffic (m³/h) range listed in the parameters table. For example, if you need approximately 10,000 m³/h, models such as 5A (at 1450 r/min) or 5.6A (at 1450 r/min) would be appropriate candidates.
Q4
What does the pole number in the Power (kW-P) column indicate?
The number following the dash in the Power column (e.g., "2" in "0.75-2" or "4" in "1.1-4") refers to the number of motor poles. A 2-pole motor runs at approximately 2900 r/min at 50 Hz, while a 4-pole motor runs at approximately 1450 r/min, and a 6-pole motor at approximately 960 r/min. This directly corresponds to the speed listed in the Speed column.
Q5
All models operate at 50 Hz — are 60 Hz versions available?
The standard models listed in this parameter table are designed for 50 Hz electrical systems, which are common in Asia, Europe, and many other regions. If your facility operates on a 60 Hz power supply (common in North America), please contact us directly to inquire about 60 Hz compatible versions or the use of a frequency converter to adapt standard models.
Q6
What does Total Pressure (Pa) mean, and why does it vary across the traffic range?
Total pressure (measured in Pascals) represents the combined static and dynamic pressure the fan can generate, indicating its ability to overcome resistance in a duct system. The values listed as a range (e.g., 790–485 Pa) correspond to the minimum and maximum airflow conditions respectively — higher airflow results in lower pressure, and lower airflow results in higher pressure. This is characteristic of the fan's performance curve and should be matched against your system's resistance curve for optimal selection.