Transcription of REFRIGERANT PIPING INTRODUCTION
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REFRIGERANT PIPING INTRODUCTION
Copyright 1964, 2009, By Refrigeration Service Engineers Application ManualSAM Chapter 630-33 Section 1 MREFRIGERANT PIPINGBy: Cecil R. Visger, Past International PIPING INTRODUCTIONIn recent years, manufacturers of condensing units have more and more gone to motor-compressor units and direct-drive compressors, which means that the compressors are turning at motor speeds. These relatively high-speed compressors cannot operate without proper lubrication at all times. Even more than formerly, adequate oil return must be PIPING is conducive to long life and minimum repairs to the equipment, such as reduction of damage to compressors by broken valves, burned out bearings and scored cylinders by the lack of proper oil return; and damage to expansion valves due to wire drawing as a result of flash gases, to name only a few of the possible damages.
air, or to drop in pressure due to friction in the piping or to static head. b. The expansion valve or other flow control devices should be selected according to the manufacturers’ rating for the capacity required after pressure drop due to friction and static head have been considered. c.
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