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This is the filter element; Insufficient air supply problems encountered downstream from your compressed air filter are often caused by the element becoming plugged and choking your air supply. If your air tool or applications isn't getting enough air, check the element. Clean it or replace it, depending on the type. Some manufacturers offer a Delta P gauge as part of their filter assembly. The Delta P will indicate pressure drop across the filter, and the increase of pressure drop indicates that the filter element is doing it's job, and trapping debris and removing it from the compressed air stream. The dirtier your air, the sooner your elements will plug. Filter elements have a specific flow capacity measured in CFM, and a particulate size rating measured in Microns. The chart below tells you the actual size particle that a specific Micron rating represents. General purpose filter elements are 30 or 40 Micron sized. For some applications, you'll want a 5 Micron element, however, depending on your air quality, an element that 'fine' will clog quickly. It's common, then, to use a general purpose filter upstream from the unit with the 5 Micron element, to increase it's life. Applicable scope: Chemical, petroleum, pharmaceutical, cars, light industry, food, dressing, metallurgical, textile Applicable object: chemicals Our filter is a good products.Welcome to our company.Ths