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refrigerant compressor lube oil properties

1. Good miscibility and solubility with refrigerant.
2. low floc point and wax content.
3. thermal stability

4. chemical stability with refrigerant.
5. low pour point(to prevent congealing and restriction of flow)
6. high viscosity index and should maintain viscosity even diluted with oil.
7. low foaming (prevents excessive carryover during starting). eg. Alkyl Benzene 
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