The forward curved centrifugal fans corresponds to the rear curved centrifugal fan. Although both of them are centrifugal fans, there are many differences in many aspects, including pressure, size, efficiency, loadability, noise, impeller speed, and application. Range and so on.
When the size, speed, and flow of the current curved centrifugal fan and the backward curved centrifugal fan are the same, the pressure obtained by the front curved centrifugal fan is the largest, and that after the curved centrifugal fan is the smallest; when their flow rates and rotation speeds are the same, and the total pressure is required to be the same, The front curved centrifugal fan has the smallest radial dimension and the largest rearward inclined blade.
Note that, for example, a 225-diameter rear-bend centrifugal fan can only be compared with a 160-mm front-bend centrifugal fan at the same flow rate, rpm, and full-pressure, or 170 or 160 dia. A curved centrifugal fan is not comparable to a front curved model.
From the viewpoint of work efficiency, the efficiency of the forward curved centrifugal fan is the lowest, and that of the rear-bent centrifugal fan is the highest; the front-bent centrifugal fan is easy to overload, and the fixed loadability is poor. In comparison, the rear-bend centrifugal fan is not easy to overload, and the stability is stronger. The scope of application is also broader.
The advantage of the forward curved centrifugal fan is that it has low noise, and the noise of the rear-bent centrifugal fan is normal; the front-bent centrifugal fan and the rear-bent centrifugal fan are also different in the speed of the impeller. The speed of the former is generally low, and the latter is high.
After comparing the above aspects, it can be seen that the application range of the front curved centrifugal fan is small, and the application range of the rear curved centrifugal fan is relatively large. Of course, the specific type of centrifugal fan that is used must also be determined based on actual conditions and related requirements.