Centrifugal fans have a relatively large air volume, so they can be used for ventilation, induced draft, and cooling in places such as metallurgy, electric power, mines, and tunnels. However, the fan models used in different places may not be the same, so correct selection is of great importance. What are the steps for selection? What should be noted during the selection process? Let me share with you.
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It is necessary to evaluate the required air volume of the fan. This evaluation process is a crucial step. Since there are usually errors in most engineering measurements, it is recommended to add a 10% – 20% margin when determining the required air volume to ensure the running effect of the fan. When evaluating the air volume, the resistance from the inlet or outlet of the fan should also be considered to prevent it from being too large or too small, which may lead to low efficiency.
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The required air pressure needs to be considered. This indicator is mainly used to determine the output power and rotational speed of the centrifugal fan and also affects its efficiency. When evaluating the air pressure, factors such as resistance, air flow velocity, and pipe length need to be considered. If the pipe design is not good during the operation of the fan, it will affect the air flow in the pipe and cause the air pressure to get out of control.
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According to the required air flow temperature and ambient temperature, appropriate fan materials need to be selected to ensure that the fan can operate stably for a long time under harsh working conditions. Generally speaking, if it is necessary to handle high-temperature air flow, special material centrifugal fans need to be selected to ensure that the materials do not deform and guarantee important properties such as the mechanical strength and wear resistance of the fan.
Steps and Precautions for Centrifugal Fan Selection
- Understand the materials of the centrifugal fan. Usually, the materials of the fan can be divided into steel plates, alloys, plastics, and stainless steel. When selecting, the appropriate material should be determined according to specific requirements. For example, stainless steel should be selected for applications with strong corrosive requirements, and hard alloy materials should be selected for those with high requirements for shear strength and wear resistance.
It is recommended that when selecting a fan, other factors such as power, noise, maintenance cost, and reliability should also be considered. Overall, the power of the fan should be appropriate. If it is too high, the running cost will be high; if it is too…
