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Junior high school high efficiency filter in fresh air system


In addition to ventilation and ventilation, the fresh air system also has an important environment to filter the airborne pollutants through the air filter of the fresh air system. The general fresh air system is divided into three layers of air filte, namely the initial air filte and the medium efficiency air filte. And HEPA filter. In the fresh air system, it is generally used together with the initial effect or the junior high school, and is generally not used alone.

The primary filter is made of white filter cotton, which increases the filtration area and effectively filters large particles of dust and insects into the air.

The medium-efficiency filter layer mostly adopts a bag filter. Because of the large windward surface, the large amount of dust and the low wind speed are considered to be the best medium-efficiency filter structures at present.

The high efficiency filter, HEPA filter, has an efficiency of 99.7% for 0.1 micron and 0.3 micron. The HEPA mesh is characterized by air passing through, but fine particles cannot pass. However, HEPA is divided into five kinds of materials: PP filter paper, glass fiber, composite PPPET filter paper, melt-blown polyester non-woven fabric and melt-blown glass fiber. Features: large wind resistance, large dust holding capacity, high filtration precision, can be processed into various sizes and shapes according to customer needs, suitable for different models.

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