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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