How to distinguish between good and bad quality of air filters and pre filters

 The quality of Air Filters depends on the following three main aspects.
         (1) Waterproof performance ;
         (2) Filtration precision;
         (3) permeability.
         Specific tests are as follows.
        (a) Water quality test. Place the Air Filter flat on the floor or table, and sprinkle some water on the Filter Paper.
         (1) If the filter paper leaks within 5 minutes, it belongs to the air filter made of cotton pulp paper (poor quality filter paper);
         (2) If the filter paper leaks for 2-5 hours, it is made of low-grade wood pulp paper and can be used, but it will reduce the gas production efficiency of the air compressor (more electricity consumption, more gas production) belongs to the main filter;
         (3) If the leakage 12-15, belongs to the Medium Filter;
         (4) If the water does not leak within 24 hours, it belongs to the high efficiency filter.
         (2) Observe the light to see whether the filter paper is uniform, whether the light transmission rate is good, and whether the surface finish of the filter paper is good. The response is filtering precision and permeability.
         (c) Check the depth of the filter paper and folding. If the filter paper is very deep and folded more, the air filtration area is large.
         In a particularly harsh environment, users should clean the air filter once a day and replace 500-800 hours; customers in the environment should clean the air filter every 3-7 days, 1000-1500 hours instead of air filter; customers in a good environment should replace the air filter every 1500-2000 hours.