The main reason is that the fan is used to transport the gas in the dust collector. If the fan is installed in front of the dust collector, it must be ensured that there are no particles in the smoke and dust drawn in. If there are large particles, it is easy to cause damage to the fan motor. In addition, the smoke and dust drawn by the fan cannot contain strong corrosive gases, otherwise the service life of the fan will be greatly reduced.

Installing behind the bag filter can protect the fan, prevent the fan from being intruded by particles such as dust and impurities, and reduce the wear and erosion of the fan.

However, the specific installation method needs to be determined according to the actual application scenario, system requirements, and equipment layout. It is also possible to install the bag filter in front of the fan, but it may affect the system performance, such as the pressure loss of the fan, the resistance of the bag filter, etc. Therefore, when choosing an installation location, it is recommended to consult a technical engineer for more detailed advice.