Air compressors essentially convert power from motors or engines into energy. Using the basic principles of atmospheric pressure, power is required to compress air and energy is then released as that air expands to return to normal. By pressurising air and storing it, compressors can provide potential power for a number of important uses such as powering construction tools like nail guns, wrenches, drills and saws, turning air turbines, filling tires and running certain heating, ventilation and air conditioning (HVAC) systems. Air compressors are generally considered to have many advantages over electrical and hydraulic power, including simpler design, fewer parts, higher safety characteristics and lower equipment weight.
Compressors are normally based on one of two principles, positive or negative displacement. Positive-displacement refers to forcing air into a space with a decreased volume using either pistons, rotary screws or vanes. Negative-displacement refers to the use of centrifugal compressors for compression and is more common in larger scale industrial uses. Gas and diesel compressors are the most common type of air compressor and are popular in areas with less reliable electricity, while electric powered compressors are used in areas with guaranteed access to power, such as workshops, plants and production lines. Continue reading