There are several types of compressed air dryers on the market, and many different applications for drying compressed air. Many industrial and commercial applications for compressed air will be for hand tools or the operation of pneumatic cylinders and valves in an indoor applications. These are referred to as “power” applications. For the most part, these applications require the air to be free of condensate (free liquid), which will impede the tool’s performance and cause corrosion, shortening the life of the tool. Refrigerant air dryers are usually selected for these applications. They remove water vapor from the compressed air by means of cooling the incoming air to a level within the design dew point range, separating the condensate, and then draining it off.
Dew Point Requirement in Power Applications
In most refrigerant dryers (usually 15 CFM capacity and larger), the compressed air is re-heated after the separation stage, providing a
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A variety of air compressors are available in the market of which oil-less air compressors are used to provide oil-free compressed air. They are used in critical operations, where products or processes could become contaminated if subjected to small amounts of oil. Contamination may result in costly scrapping of product and/or production downtime to clean or purify the system. Oil-less compressors may also be used with additional purifying filtration and safety controls to produce air for breathing applications in industry and medical systems.
Oil-less reciprocating air compressors consist of dry compression chambers using synthetic self-lubricating guide rings and piston rings. The lower end running gear employs sealed main ball bearings and sealed connecting rod bearings so no oil is used in the crankcase. The complete absence of oil in this design eliminates the possibility of oil migration from the crankcase to compression chambers, which may be a concern in … Read the rest