Industrial air filters are typically classified based on filtration efficiency and structural design. By efficiency, they mainly include pre-filters, medium efficiency filters, high-efficiency particulate air (HEPA) filters, and ultra-low penetration air (ULPA) filters. Pre-filters are primarily used to intercept large particles of 5 microns and above, serving as the first line of defense in a system. HEPA filters, on the other hand, can efficiently capture particles of 0.3 microns and larger, with a filtration efficiency of over 99.97%. Understanding the filtration standards of different grades helps enterprises select the appropriate models for specific application scenarios, thereby ensuring air quality while effectively controlling operating costs.
