Industrial vacuum cleaners separate solids and air mainly through filter media. Common industrial vacuum cleaners on the market generally have a single filter or double filters. For example, a dry and wet type filter material is a single filter element, and a dry type vacuum cleaner is a filter element. And filter bag dual filtration system, the filter’s general filtering accuracy of about 10 microns, through the film or the use of special materials, can reach the accuracy of 1 micron or less, filter cloth often use non-woven or polyester needle felt, through different production The process can maintain the accuracy at about 0.5 microns.
At present, some companies improve the filtration accuracy and air purification by adopting the transformation of filter media and increasing the number of stages. The two-fold or more filtration methods are generally adopted. Dry-type powder adopts three-stage filtration, and the wet and dry type is adopted. Double filtration, welding fume vacuum cleaner adopts four-fold filtration method. Through the modification and upgrading of filter media, such as the use of high-efficiency filter (HEPA), the use of industrial vacuum cleaner can be expanded, and the use effect can be improved.