Those who aren't familiar with air compressors might wonder what they're good for. The answer is, just about everything! At the simplest level, they can pump up bicycle tires, air mattresses, pools and anything else inflatable, all with a minimum of effort and no need for superhuman lung power. Compressors can power air tools such as nail guns, spray painters, air brushes, and more. Heavy duty air compressors have a wide range of uses in industry.The power of an air compressor is measured in CFM (cubic feet per minute) for air flow and PSI (pounds per square inch) for pressure. Small tools such as nailers may need only two to five CFM at 70 to 90 PSI, while a larger tool such as a belt sander might require 10 or more CFM and 100 to 120 PSI. For home use, a portable air compressor will usually provide all the power you'll need.
Air compressors can be powered by gas engines or electricity. Electric compressors are generally preferred for home use, while gas power is necessary for a work site that doesn't have electricity or jobs that require mobility. Above all, be certain to use the correct voltage and phase as required by your compressor.
Belt-driven compressors work with less vibration and heat and therefore are likely to last longer. V-design cylinders also reduce heat, as opposed to inline cylinders. For light duty, oil-free compressors need little or no maintenance. If you are using a compressor that requires oil, a low-oil shutdown will make costly repairs less likely. Finally, it's a good idea to look for a tank certified by ASME (American Society of Mechanical Engineers) and a cast iron cylinder.
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