Alkylbenzene lubricant is most closely associated with which refrigerant family?
Substitute refrigerants and oils · EPA 608 Core. The correct answer, and the reasoning behind it.
Why there are no true drop-in replacements, and fractionation in blends.
The question
Alkylbenzene lubricant is most closely associated with which refrigerant family?
- HCFCs such as R-22Correct answer
- HFCs such as R-410A
- Hydrocarbons such as R-290
- HFOs such as R-1234yf
Why “HCFCs such as R-22” is correct
Alkylbenzene oils are commonly used with HCFC refrigerants such as R-22. HFC refrigerants generally need ester oils, because they are not compatible with many of the lubricants used with CFCs and HCFCs.
Source: EPA: Test Topics
Why the other answers are wrong
- HFCs such as R-410A — R-410A systems normally use POE oil.
- Hydrocarbons such as R-290 — Hydrocarbon systems use lubricants chosen by their manufacturers, not as the classic alkylbenzene pairing.
- HFOs such as R-1234yf — HFO automotive systems typically use other synthetic oils.
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