Mechanics often use pneumatic tools because they are more effective and faster than hand-held or battery-powered devices.
Compressor filters are devices used on air compressors to filter dirt particles from the intake air supply, remove contaminants from the compressor lubricating oil, and retain moisture in the compressed outlet air stream. Air and oil intake filters often feature cassette-type inserts made of cellulose, felted material, or fabrics. Water filters generally consist of a glass container and a filter element that separates the condensate from the compressed air. The bowls have a drain tap at the bottom to periodically remove trapped water. Compressors of all types benefit significantly from the inclusion of all types of compressor filters and therefore regular inspection of these items will ensure the longevity of the compressor and the integrity of the compressed air supply.
Compressors are devices that draw atmospheric air into a compression head, where it is pressurized and stored in a tank or reservoir for later use. Common uses for compressed air include pneumatic tools, spray painting, or sandblasting. Unfortunately, compressors also draw all airborne contaminants into the system. Condensation buildup is also an unavoidable byproduct of the air compression cycle. Lubricating oil from the compressor head also finds its way into the stored air and, along with dust and moisture, can wreak havoc on sensitive tools, hoses, or spray paint.
The most effective way to remove a significant volume of these contaminants is to use a compressor filter. These devices fall into three basic categories that address all of the common contaminant problems experienced with compressed air systems. The first of these categories is the family of intake air filters. Usually consisting of a cassette-type insert in a closed cylinder, these devices are placed in the compressor’s inlet air line, from where they remove most airborne dust particles. These filter elements are usually made of cloth, cellulose fiber or felted materials.
The second type of compressor filter is the moisture trap or filter. These filters consist of a filter element in a glass container. The structure of the filter causes a cyclonic internal flow pattern, which separates most of the condensate from the air leaving the compressor. The water is collected in the bucket from where it is then drained through a small valve at the bottom. Combination compressor filter models that remove leached lube oil and water are also available.
The last type of compressor filter is a standard oil filter that ensures that the lubricating oil in the compressor is kept free of contaminants. These are also cassette-type filters that have specialized core elements similar to a car oil filter. The longevity of the compressor mechanism, the hoses and all the equipment it drives, as well as the quality of spray painting jobs completed with compressed air, can be greatly increased by installing these filters. For this reason, these filters should be inspected regularly and replaced immediately if worn or defective.