WHAT IS SO DIFFERENT ABOUT REFRIGERANT OILS?

by OilAdmin 0 Comments

ALTHOUGH THE COMPRESSION COMPONENTS OF CENTRIFUGAL COMPRESSORS REQUIRE NO EXTERNAL LUBRICATION, ROTATING SHAFT BEARINGS, SEALS AND COUPLING MUST BE CONSTANTLY AND ADEQUATELY LUBRICATED. JUST AS OTHER DRIVE SYSTEMS, HOWEVER, VERY FEW REGULAR OILS COULD MEET THE VISCOSITY AND DRYNESS REQUIREMENTS AS OUTLINED ABOVE.
FOR RECIPROCAL SYSTEMS, THE REFRIGERANT GAS CARRIES SOME OIL WITH IT INTO THE CONDENSER AND THE EVAPORATOR. THIS OIL MUST BE RETURNED TO THE COMPRESSOR WITHIN A REASONABLE TIME PERIOD AND HAVE ADEQUATE FLUIDITY AT LOW TEMPERATURES. THE OIL MUST ALSO REMAIN MISCIBLE AND BE FREE OF SUSPENDED MATTER THAT MIGHT CLOG THE SYSTEM. IN SMALL, POT TYPE, HERMETIC REFRIGERATION/AIR CONDITIONING SYSTEM, THE OIL IS NORMALLY NEVER CHANGED, SO IT MUST LAST FOR THE LIFE OF THE COMPRESSOR.

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