Properties of refer compressor lube oil
- High Viscosity Index (Density 300kg/mm³, A high viscosity index means smaller changes in viscosity at temperature changes as compared to a low viscosity index.)
- Low pour point (-42⁰c).
- High flash point (235⁰c).
- Good lubricating properties at low temp.
- Low floc point.
- Oil should be free from moisture /water under all conditions to prevent plant corrosion & freezing at the expansion valve.
- Oil should be compatible with the system. materials (doesn't react with seals & gasket).
- miscibility to refrigerant, but easily separated.
*Lube oil also provides some degree of cooling while in circulation.
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