Alkylbenzene (AB) oil is used for systems with which refrigerants?

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Multiple Choice

Alkylbenzene (AB) oil is used for systems with which refrigerants?

Explanation:
Alkylbenzene oil is a mineral-type lubricant chosen for systems using HCFC refrigerants because those refrigerants mix well with mineral oils and AB oil provides reliable lubrication and stability in that combination. HCFCs like R22 and their blends are designed to work with mineral-type lubricants, so AB oil is appropriate. Modern refrigerants such as R134a and R1234yf are more polar and require hygroscopic ester-based oils (POE) to maintain lubrication and prevent moisture-related issues, which is why AB oil isn’t used with them. Hygroscopic POE oils actively absorb moisture, a trait not suitable for the mineral AB oil.

Alkylbenzene oil is a mineral-type lubricant chosen for systems using HCFC refrigerants because those refrigerants mix well with mineral oils and AB oil provides reliable lubrication and stability in that combination. HCFCs like R22 and their blends are designed to work with mineral-type lubricants, so AB oil is appropriate. Modern refrigerants such as R134a and R1234yf are more polar and require hygroscopic ester-based oils (POE) to maintain lubrication and prevent moisture-related issues, which is why AB oil isn’t used with them. Hygroscopic POE oils actively absorb moisture, a trait not suitable for the mineral AB oil.

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