A blend of R-32, R-125, and R-134a that has very similar properties to R-22 in low and medium temperature refrigeration applications. R-407A has the closest property match to R-22 in a low temperature retrofit project compared to other blends on the market; however, there is a 10°F temperature glide. Most new supermarket and refrigeration equipment has been built for an HFC such as R-404A, R-507, or R-407A. New systems built with R-407A must have POE lubricants, and retrofitted R-22 systems would need the residual oil changed to POE.
COMPONENT :
HFC-134a
TECHNICAL DATA:
Chemical name : 1,1,1,2-Tetrafluoroethane
Common name : R-134a
CAS# 811-97-2
Raki R134a
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R507
An azeotropic blend of R-125 and R-143a intended for low and medium temperature refrigeration systems. Similar to R-404A in operation, most new equipment has been rated to use either blend. There will be slightly higher pressures and capacity with R-507 compared to R-404A. R-507 requires polyolester (POE) lubricant, which is usually charged into new equipment. If retrofitting existing equipment, the original oil must be replaced with POE.
COMPONENT :
HFC-125 HFC-143a
TECHNICAL DATA:
Chemical name
1,1,1-Trifluoroethane, Pentafluoroethane
Common name
R-507A, R-507
CAS #
420-46-2, 354-33-6