The air filter can be divided into primary effect filter, medium effect filter, high efficiency filter and sub-efficient model according to different classifications. Air filters are often made of synthetic fiber filters. The outer frame is made of strong, moisture-proof cardboard box, aluminum alloy, galvanized frame, stainless steel, etc. In the normal operating environment will not be deformed, broken, twisted. In addition, the filter is fixed diagonally before and after the frame. The tightly bound outer frame of filter media and outer frame prevents air leakage. The air filter should also pay attention to some precautions in the cleaning and maintenance.
The primary effect air filter is mainly applied to primary filtration of air conditioning and ventilation systems, return air filtration of clean rooms, and pre-filtration of local high-efficiency filtration devices. It is mainly used to filter dust particles with a particle size of 5 μm or more. Also used for primary protection of multi-stage filtration systems. Filtration materials include non-woven fabrics, nylon meshes, aluminum wave meshes, stainless steel meshes, etc. The non-woven fabric filter material has undergone a finishing treatment on the air outlet side to prevent the secondary fibers from being scattered due to the breakage of the non-woven fibers.
High-efficiency air filter is suitable for normal temperature and normal humidity, and allows air filtration with traces of acid and alkali organic solvents. The product has high efficiency, but has high resistance and small dust holding capacity. It is widely used in aerospace, aviation, electronics, pharmacy, and bioengineering. And other precision areas. It is used to filter out the dust impurities in the air sucked by the air compressor. The cleaner the air sucked, the more secure the service life of the oil filter element, the oil separation core and the oil, and prevent other foreign materials from entering the host machine, causing damage to the host machine, resulting in the host computer ” Locked and even scrapped. The life expectancy is usually around 2000 hours.
HEPA filter product classification: There is a high efficiency filter separator, no partition high efficiency filter, combined high efficiency filter, high temperature and high efficiency filter. Refers to the maximum diameter of the foreign particles allowed to pass. The key to influencing the filtration accuracy is the filter element. Different filter elements can be selected according to the requirements of the following components, so as to achieve the corresponding filtering accuracy. The flow characteristic refers to the curve of the relationship between the air flow through the filter and the pressure drop across the filter under a certain inlet pressure. When it is actually used, it is better to choose the pressure loss in the range of less than 0.03 MPa. In air filtration, the main factors affecting the flow characteristics are the body and the filter element.