Classification and use of air filter filtration level?

In our life, air filters are very common, and the types of air filters are also very diverse, including primary efficiency filters, medium efficiency filters, and high efficiency filters. What are the characteristics and uses of these filters? Let me explain it to you below!

How many categories can air filters be divided into?

Normally, the particle size that the primary filter can filter is generally greater than or equal to 5 microns, and for this particle filtration phenomenon, it can reach 35%; the medium-efficiency filter can filter particles greater than or equal to 1 micron, which can reach 60 ~95% filtration efficiency; high efficiency filters have a filtration efficiency of around 98 for particles with a diameter of 0.5 microns.

Features and Uses of High-Efficiency Air Filters for Junior High Schools:

The primary filter generally has three styles: plate type, folding type and bag type. Its outer frame is made of paper frame, aluminum frame, galvanized iron frame, etc. The filter material includes non-woven fabric, activated carbon cotton, metal mesh, Nylon mesh, glass fiber, etc. Since the filtration degree of the primary filter is not too high, it is generally installed in the pre-filtration of the filtration equipment. Some clean return air systems.

Medium-efficiency filters are divided into three types: bag type, plate and frame type, and combined type. The frame is made of aluminum alloy and galvanized sheet. The filter material is generally non-woven, pp or glass fiber. Medium-efficiency filters are often used in the primary filtration of air-conditioning systems and are pre-filters of high-efficiency filters. If the cleanliness requirements are not high, the medium-efficiency air filters can be used for processing and then sent directly to users.

The high-efficiency filter has three styles: without clapboard, with clapboard, and combined type. The filtration phenomenon is better. In industrial occasions with high requirements on cleanliness, it can also be used as terminal air filtration in purification equipment such as clean rooms, high-efficiency air outlets, purification workbenches, and air showers.