
The 4-72 Model Centrifugal Fan conveys air and other non-flammable, non-toxic gases that do not corrode steel. No viscous substances are permitted within the system. The dust and hard particulate content must not exceed 150 mg/m³, and the gas temperature must not exceed 80°C. This fan employs backward-curved blades with superior aerodynamic properties, delivering smooth operation, high airflow, minimal vibration, high efficiency, and extended service life. It is widely used for ventilation in industrial and mining enterprises, large-scale buildings, hotels, and restaurants.
The B4-72 type is an explosion-proof centrifugal ventilator, mainly composed of aluminum impeller, casing, air inlet and other components, as well as an explosion-proof motor. It can be used for ventilation of flammable volatile gases, with its performance and installation dimensions being the same as those of the 4-72 type.
The F4-72 type is a corrosion-proof centrifugal ventilator, mainly made of impeller, casing, air inlet and other components constructed from stainless steel (or fiberglass reinforced plastic/FRP), combined with a motor. It is suitable for transporting corrosive gases, and its performance and installation dimensions are identical to those of the 4-72 type.
Type A: Direct drive with the motor, where the fan impeller and casing are directly fixed on the motor shaft and flange plate.
Type C: Equipped with a cantilever support device, driven by a belt.
Type D: Equipped with a cantilever support device, driven by a coupling.
| Core Technical Parameters | |||||
| Model | Rotation speed
(r/min) |
Voltage (V) |
Power (kW) |
Air flow (m³/h) |
Total pressure (Pa) |
| 2.5A | 2900 | 380 | 0.75-2 | 805-1677 | 792-483 |
| 2.8A | 2900 | 380 | 1.5-2 | 1131-2356 | 994-606 |
| 3.2A | 2900 | 380 | 2.2-2 | 1688-3517 | 1300-792 |
| 1450 | 380 | 1.1-4 | 844-1758 | 324-198 | |
| 3.6A | 2900 | 380 | 3-2 | 2664-5268 | 1578-989 |
| 1450 | 380 | 1.1-4 | 1332-2634 | 393-247 | |
| 4A | 2900 | 380 | 5.5-2 | 4012-7419 | 2014-1320 |
| 1450 | 380 | 1.1-4 | 2006-3709 | 501-329 | |
| 4.5A | 2900 | 380 | 7.5-2 | 5712-10562 | 2554-1673 |
| 1450 | 380 | 1.1-4 | 2856-5281 | 634-416 | |
| 5A | 2900 | 380 | 15-2 | 7728-15455 | 3187-2019 |
| 1450 | 380 | 2.2-4 | 3864-7728 | 790-502 | |
| 5.6A | 1450 | 380 | 3-4 | 7062-9885 | 957-759 |
| 6A | 1450 | 380 | 4-4 | 6677-13353 | 1139-724 |
| 960 | 380 | 1.5-6 | 4420-8841 | 498-317 | |
| 6.3A | 1450 | 380 | 5.5-4 | 8052-13028 | 1239-921 |
| 960 | 380 | 1.5-6 | 5331-8626 | 542-403 | |
| 7.1A | 1450 | 380 | 11-4 | 12676-20513 | 1572-1168 |
| 960 | 380 | 3-6 | 8392-13581 | 678-512 | |
| Model | Outlet flange size
(mm) |
Inlet flange dimensions
(mm) |
Outline size
(mm) |
||||||||
| A1 | A | B1 | B | D | d | L | L1 | H | h | W | |
| 2.5A | 225 | 165 | 264 | 202 | 310 | 245 | 506 | 174 | 525 | 353 | 443 |
| 2.8A | 270 | 195 | 295 | 223 | 330 | 280 | 580 | 197 | 591 | 380 | 493 |
| 3.2A | 289 | 219 | 326 | 255 | 372 | 320 | 658 | 230 | 647 | 410 | 518 |
| 3.6A | 320 | 250 | 360 | 291 | 410 | 355 | 725 | 254 | 726 | 473 | 608 |
| 4A | 357 | 286 | 400 | 331 | 464 | 400 | 804 | 285 | 873 | 577 | 715 |
| 4.5A | 391 | 320 | 436 | 364 | 515 | 450 | 894 | 313 | 903 | 575 | 741 |
| 5A | 425 | 355 | 476 | 404 | 561 | 500 | 999 | 354 | 1046 | 703 | 889 |
| 5.6A | 445 | 369 | 529 | 453 | 620 | 560 | 1103 | 390 | 1067 | 683 | 728 |
| 6A | 504 | 424 | 560 | 480 | 663 | 603 | 1182 | 420 | 1155 | 747 | 823 |
| 6.3A | 523 | 446 | 585 | 507 | 698 | 630 | 1236 | 439 | 1209 | 777 | 883 |
| 7.1A | 606 | 506 | 680 | 580 | 795 | 730 | 1458 | 495 | 1220 | 875 | 1055 |