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The Taming of The Screw, If you use or maintain Screw compressors, then waiting for failure before effecting in depth maintenance could lead to some very expensive bills and inconvenience when least needed. The following describes a different approach to the routine overhaul of these increasingly popular compressors. The more familiar reciprocating compressor is routinely regarded as a “ run it until it stops ” machine, and with most popular models widely available from the re-manufacturing industry at a generally attractive price, most users and maintainers effect minimal routine maintenance to the compressor itself. There are two principle designs of screw compressor in common use, twin rotor, and single rotor / star wheel (single or double star). Hitachi Screw Compressor. We understand Hitachi recommend bearing overhaul of these compressors based upon the running time of the machine, and it’s application. Running time reduces with more arduous usage i.e. higher head operating pressure. Originally these compressors typically required service at 12,000 hours for the more commonly found air-cooled chiller units. Copper plating. This is prevalent in over 70 % of compressors we examine. If allowed to build up the generated copper debris interferes with the close running tolerances of the compressor bearings and rotors and leads to seizure. This problem is caused by trace quantities of moisture entrained within the fridge circuit, leading to electrolytic deposition of copper ions from the associated system pipework.
Tags : screw compressors, copper ions, screw compressor, twin rotor, trace quantities, star wheel, copper plating, compressor maintenance, maintenance considerations, air cooled chiller, reciprocating compressor, double star, taming of the screw, attractive price, routine maintenance
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