The primary filter bag filter material is made of filter cotton, and the primary filter bag has a grade efficiency of G3 and G4, respectively; The initial filtration bag is suitable for the front filtration and air conditioning application fields of automotive spray painting workshops in the painting industry, such as commercial buildings, warehouses, schools, laboratories, electronics, food and pharmaceutical, hospitals, central air conditioning, and other places. The primary filter bag can also serve as a pre filter for medium efficiency air filters, reducing the load on the medium efficiency filter and extending its service life.

The efficiency levels of medium efficiency filter bags are F5, F6, F7, F8, F9, and so on.

The filtration standard for medium efficiency filters is to filter dust particles with a particle size of 0.5um and above, and the filter materials are generally synthetic fibers and fiberglass. When using synthetic fiber filter material for medium efficiency filters, the process and initial efficiency method are roughly the same. The outer frame of the filter is made of aluminum alloy, galvanized sheet, paper frame, stainless steel, with thicknesses of 21mm, 25mm, 46mm, etc., while when using fiberglass filter material, it can be made into processes without or with partitions 292. Without or with partitions is also an efficient and commonly used process method, with thicknesses of 50, 70, 90, 150, etc.

Replacement cycle of bag type medium efficiency filter:

1. When the resistance of the medium efficiency filter reaches 400Pa or above, the filter must be replaced.

2. If the dust concentration in the usage environment is high, the service life will also be reduced.

3. Under rated air volume usage conditions, it can be replaced within 34 months

Replacement cycle of bag type medium efficiency filter

1. When the resistance of the medium efficiency filter reaches 400Pa or above, the filter must be replaced.

2. If the dust concentration in the usage environment is high, the service life will also be reduced.

3. Under the rated air volume usage conditions, the medium efficiency filter needs to be replaced within 3-4 months.

4. If the medium efficiency filter uses washable filter media, the replaced filter media can be rinsed with clean water or a solution containing neutral detergent, dried, and then replaced; Allow for secondary cleaning, which means that a new medium efficiency filter must be replaced.

The above mainly provides a brief introduction on filtration efficiency, materials, and technology. I hope it can help you understand the difference between primary and medium efficiency plate filters.

Air filters are increasingly recognized by more and more people. They improve air quality and ensure people's health, and have been widely used. For example, industries such as medicine and food cannot do without filters with various efficiencies.