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RS-52 is compatible with both the traditional and new synthetic lubricants so that there is no need to change the oil when converting to RS-52. RS-52 is suitable for use with mineral, alkylbenzene and polyol ester oils.

RS-52 avoids the costly and often technically unsatisfactory changeoever to the new synthetic lubricants required of a full retrofit to R404A.

No changes to hardware

RS-52 can replace R22 & other Ozone Depleting Substances at low temperatures without changes to the existing hardware. Approximately 10% less RS-52 is required to replace R22, & possibly a slight adjustment to the expansion device may be required. The changeover process is simple, straightforward & can be very cost effective in comparison to a full retrofit to R404A.

Discharge Temperature

RS-52 has lower discharge temperatures, particularly compared to R22, which provides considerable operating benefits including an improvement in the reliability of the system and avoidance of lubricant breakdown.

Discharge Temperature


RS-52 is suitable for use in applications where R22, R502, R403B (69L), R402A (HP80), R408A (FX10) & R411B are commonly found including, but not restricted to, supermarket display cases, ice machines, cold storage, transportation of foodstuffs, freezer cabinets, freeze dryers & environmental test chambers.

New Equipment

RS-52 with its rapid pull-down feature is suitable for use in new equipment with the added benefit of being able to be used with both the traditional & new synthetic lubricants.


Because RS-52 is a blend, it should be charged into the system in the liquid as opposed to vapour form. Vapour filling is possible when the total cylinder contents are charged into the system. Because RS-52 is a near azeotrope it has a very low temperature glide of less than 1°C.