Industrial air compressors are a crucial and fundamental part of the plant's operation (so crucial, in fact, that compressed air is also known as the fourth utility). With so much emphasis on the lifetime of these machines, air compressor maintenance has become key to conserving a company’s funds. When properly maintained, industrial air compression systems decrease downtime, increase production rates, and improve the quality of the air being produced. Two system components that require routine maintenance are the compressor package and the compressor drives. A lot of minor problems can be attended to simply by cleaning, replacing parts as necessary, and doing away with harmful conditions that could hinder the compressor’s working ability. Using a professional air compressor maintenance service will reduce safety hazards and increase the reliability of the air compressor.
Components that need to be maintained by the compressor package are the heat exchanger surfaces, the compressors, the air-lubricant separator, the air-inlet filter, the lubricant, and the lubricant filter. Heat exchanger surfaces should be kept clean; if they are not, the air compressor will be less efficient. Air lubricant separators usually perform at 2 or 3psid when new and working at full capacity. Manufacturer manuals suggest changing the air lubricant separators when it reaches a 10psid. Air compressor lubricant often becomes acidic and deteriorates the equipment, therefore decreasing system efficiency. Lubricant-injected rotary compressors require lubrication to be applied to bearings, gears, and contacting rotor surfaces. To prevent reduction of compressor capacity, air-inlet piping should also be cleaned regularly.
The compressor drive must be maintained through lubrication and cleaning. It is necessary to keep the air passages clean and clear of obstruction due to the fact that motors require cleaning. All enclosed motor fins should be free of debris to allow the compressor drive to cool. For motors with bearing grease fittings, first clean the grease fitting and remove the drain plug. Then, add new high-quality grease, run the motor for an hour, and finish by replace the drain plug. Excessive bearing wear can be caused by tight belts; on the other hand, loose belts can slip and create wasted energy. It is efficient to check and adjust belts regularly to reduce stretching and deterioration.
Lack of maintenance can cause excessive energy consumption, high operating temperatures, poor moisture control, and excessive contamination. Keep in mind that all industrial air compressor equipment should be maintained in accordance with the manufacturers recommendations. Depending on ambient conditions, it may be prudent to carry out maintenance more often than advised by compressor manufacturers.