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What are the types of air filters?

2022-09-23 Page view : 4 views

Air filter is actually a kind of air filter device. Air filters are divided into five types: coarse-efficiency filters, medium-efficiency filters, high-efficiency filters, sub-high-efficiency filters and high-efficiency filters.

The main structural materials of the coarse filter are carbon steel, low alloy steel or stainless steel, which are represented by codes C, M and S respectively. The coarse filter is usually installed on the inlet of the pump, compressor or the pipeline before the flow meter.

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The medium efficiency filter belongs to the F series filter in the air filter. F series medium efficiency air filters are divided into two types: bag type and non-bag type, among which the bag type includes F5, F6, F7, F8, F9, and the non-bag type includes FB (plate type medium efficiency filter), FS (partition type medium efficiency filter) efficient filter), FV (combined medium-efficiency filter).

The main control parameters for the selection of high-efficiency air filter products are filtration efficiency, rated air volume, initial resistance under rated air volume, dust holding capacity and external dimensions. According to the method specified in JG/T22-1999 “Performance Test Method of Air Filters for General Ventilation”, the air dust counting efficiency of particles with particle size ≥1.0μm is ≥70% and <99%. The filter is a high-efficiency air filter .

The sub-high-efficiency filter uses ultra-fine glass fiber filter paper or polypropylene filter paper as the filter material, which is densely folded. The sub-high-efficiency filter uses ultra-fine glass fiber filter paper or polypropylene filter paper as the filter material, which is densely folded. The densely folded filter paper is made of paper partitions or aluminum foil partitions with small plug-in intervals to maintain smooth passages. The outer frame is made of galvanized sheet, stainless steel sheet or aluminum alloy profile, and is sealed with a new type of polyurethane sealant. It can be widely used in general filtration in electronics, pharmaceuticals, hospitals, food and other industries, and can also be used in high temperature places.

The high-efficiency filter is mainly used to capture particulate dust and various suspended solids below 0.5um, as the end filter of various filtration systems. The ultra-fine glass fiber paper is used as the filter material, and the plastic sheet, aluminum foil board and other materials are folded as the dividing plate, sealed with a new type of polyurethane sealant, and the outer frame is made of galvanized sheet, stainless steel sheet and aluminum alloy profile.

Different types of air filters have different models and application ranges. When purchasing, you should filter according to the scope you need to use, and you should not blindly listen to the propaganda of the manufacturer and buy at will. It is worth noting that since the surface of the filter is not dirty, in order to prolong its service life, it should be regularly maintained and cleaned!

The 10 Best Medium efficiency air filters for 2022 in China.