-10 C — R-12 Saturation Pressure At

The saturation pressure of R-12 at -10°C is (21.9 PSIA). This value is a critical design and diagnostic parameter for legacy low-temperature refrigeration systems. Technicians servicing old R-12 equipment should expect approximately 7–8 PSIG on the low side when the evaporator is at -10°C. When retrofitting to R-134a or other alternatives, pressure differences must be accounted for to avoid compressor overload or expansion device mismatch.

This highlights that R-12 operates at comparatively low evaporator pressures, which contributed to its reputation for reliability and low compressor stress.

It is vital to distinguish between the two pressure readings, especially when dealing with negative temperatures. r-12 saturation pressure at -10 c

According to the table, at a temperature of -10°C, the saturation pressure of R-12 is approximately (or 2.017 bar).

It is important to note that R-12 is a CFC (Chlorofluorocarbon) and its production has been banned globally under the Montreal Protocol due to its ozone-depleting potential. Modern systems no longer use R-12. The saturation pressure of R-12 at -10°C is (21

If the temperature were to drop significantly below -10°C (for example, to -30°C), the gauge pressure would eventually drop into a vacuum (negative psig). However, at -10°C, the system remains in positive pressure, making it easier to detect leaks and for the compressor to move gas efficiently.

In a standard vapor-compression cycle, the evaporator is where the refrigerant absorbs heat and boils. If a walk-in freezer is designed to maintain an air temperature of roughly -5°C to -10°C, the coil temperature must be lower than the box temperature to facilitate heat transfer. When retrofitting to R-134a or other alternatives, pressure

For Refrigerant-12 (Dichlorodifluoromethane) at a temperature of , the saturation pressure is approximately: