In the previous post, we outlined some of the considerations for selecting either a reciprocating or rotary scroll air compressor. One of the major considerations will be the routine maintenance, which in turn will affect the “Cost of Ownership over a specified period of time”.
Maintaining Oil-less Air Compressors, Reciprocating and Rotary Scroll
Both reciprocating and oil-less air compressors require very little maintenance. The following items are basic requirements for either type of compressor.
- Air Intake Filter: It is a basic concept that in order to compress air, you must be able to intake air to the compression chamber. Air intake filters protect the compressor from ingesting contaminants that may cause cylinder and piston ring wear or damage, or cause intake and discharge valves to malfunction. As the filter becomes restricted by contaminants, the compressor will lose capacity. Depending on the cleanliness of the location, and the amount
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There are several types of oil-less air compressors available on the market, and the selection of a compressor will usually be determined by the application’s volume and pressure requirements, and in some cases, how and where the air will be used. The industry has changed over the past 50 years, and going back to times prior to the 1970’s, most oil-less air applications for standard pressure (up to 125 PSIG) were serviced by reciprocating air compressors. For large industrial applications, these compressors were available in the single stage (for pressures to approximately 100 PSIG) and 2-stage machines (pressures above 100 PSIG). For high volume applications, these machines were usually massive, with cast iron frames, and were water cooled by way of cooling jackets in the compression cylinders and heads. Most of these machines were double-acting (compressed air on both the upstroke and down-stroke of the piston) using a … Read the rest
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 compressor … Read the rest