R-32 (A2L)
R-32 PT Chart
The full R-32 pressure-temperature reference table, from -20 to 130°F. R-32 is a pure single-component refrigerant, so the chart is one saturation column with zero glide. Cross-checked against CoolProp reference data and the Hudson Technologies R-32 chart.
R-32 Pressure-Temperature Table
| Pressure (psig) | Sat. Temp (°F) |
|---|---|
| 26.8 | -20°F |
| 37.1 | -10°F |
| 49.3 | 0°F |
| 63.5 | 10°F |
| 71.5 | 15°F |
| 80 | 20°F |
| 89.2 | 25°F |
| 99.1 | 30°F |
| 109.7 | 35°F |
| 121 | 40°F |
| 133 | 45°F |
| 145.9 | 50°F |
| 159.5 | 55°F |
| 174.1 | 60°F |
| 189.5 | 65°F |
| 205.8 | 70°F |
| 223.2 | 75°F |
| 241.5 | 80°F |
| 260.9 | 85°F |
| 281.3 | 90°F |
| 302.9 | 95°F |
| 325.7 | 100°F |
| 349.6 | 105°F |
| 374.9 | 110°F |
| 401.4 | 115°F |
| 429.3 | 120°F |
| 458.6 | 125°F |
| 489.4 | 130°F |
Read the low-side (suction) pressure and find its saturation temperature for superheat, and read the high-side (liquid) pressure and its saturation temperature for subcooling. The chart is in psig (gauge) and °F. To convert: kPa gauge = psig × 6.895; °C = (°F − 32) / 1.8.
R-32 PT Chart FAQs
What is the R-32 pressure at 40F and 100F?
On the R-32 PT chart, 40F saturation is about 121 psig and 100F is about 326 psig. Because R-32 is a pure single-component refrigerant with zero glide, that same saturation temperature is used for both superheat (suction) and subcooling (liquid); there is no separate bubble and dew point.
Is the R-32 PT chart the same as R-410A?
No. Suction pressures are close, but R-32 runs a higher head: about 9 to 13 psig above R-410A at the same condensing temperature. Reading an R-32 system on an R-410A scale skews the high side. Use the R-32 column.
Does the R-32 PT chart have glide (bubble and dew)?
No. R-32 (difluoromethane) is a pure single compound, so it boils and condenses at one temperature for a given pressure. The chart is a single saturation column. Zeotropic blends like R-454B or R-407C are the ones with a bubble and a dew temperature at each pressure.
What units is this R-32 PT chart in, and how do I convert to kPa or Celsius?
The table is in psig (gauge pressure) and degrees Fahrenheit, the field-standard units in North America. To convert pressure to kPa (gauge), multiply psig by 6.895. To convert temperature to Celsius, use C = (F - 32) / 1.8. For example, 100F is about 37.8C and 326 psig is about 2,247 kPa gauge.