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What are the characteristics of a medical medium efficiency filter?
What are the characteristics of a medical medium efficiency filter?When the air enters the filter system, dust particles with a diameter of 5μm or more are first intercepted and blocked by the primary filter, while the remaining dust with a diameter of 5μm or less enters the secondary filter.When the dust touches the fiber media in the filter bag of the cleanroom bag filter, it will deviate from the direction under inertia and collide, thus settling in the filter bag and intercepting the dust particles with a diameter of 1-5um. After two layers of interception by the primary filter and the intermediate bag filter, only dust particles with a diameter of 1um or less reach the high-efficiency filter, which can effectively extend the service life of the high-efficiency filter. To achieve a better filtration effect, the cleanroom medium efficiency bag filter usually uses electrostatically charged chemical man-made fibers as filter media. When the air, which is coated with dust particles, enters the filter bag, it is not only able to effectively intercept dust particles above 1μm by the density of the fibers, but also allows the particles that collide with the electrostatic fibers to take on a different electrical charge. When these charged dust particles collide with smaller dust in the medium efficiency bag filter, they can attract and bond to each other, forming larger particles, allowing some dust smaller than 1μm to be retained by the bag filter, further reducing the burden of the high-efficiency filter. Different colors represent different filtration efficiencies. Compared to other efficiency bag filters, cleanroom medium efficiency bag filters are usually available in a variety of colors. This is not for aesthetic reasons, but to reflect the difference in filtration efficiency by way of color. The efficiency of the bags varies from one bag filter manufacturer to another. They produce white mixed bag filters with an over-reduction efficiency of F5 (40-60%); green bag filters with a filtration efficiency of F6 (60-80% ); pink bag filters with a filtration efficiency of F7 (80-90% ); yellow bag filters with a filtration efficiency of F8 (90-95%); and yellow and white bag filters with a filtration efficiency of F9 (95-98%). |
