R32 pressure temperature chart (PT)
An R32 pressure temperature chart (PT chart) is a saturation lookup for R32: it relates temperature and saturation pressure when liquid and vapor coexist in equilibrium. This is useful for thermodynamic interpretation, but it is not a universal “normal running pressure” diagnostic chart.
Pressure basis: absolute vs gauge
The table below is absolute pressure (kPa(a), bar(a), psi(a)). Many gauges display gauge pressure (relative to ambient). Converting requires local atmospheric pressure:
Learn more: Gauge vs absolute pressure (psig vs psia).
Safety note
Refrigerants have safety classifications (toxicity/flammability) and their use is governed by codes and local regulations. This page is educational and provides property reference data only — always follow OEM procedures and applicable safety requirements.
R32 saturation pressure vs temperature (reference table)
Generated using CoolProp (the same property engine used by FluidTool) at Q=0 saturation. Values are rounded for readability.
| T (°C) | T (°F) | Psat (kPa(a)) | Psat (bar(a)) | Psat (psi(a)) |
|---|---|---|---|---|
| -20 | -4 | 405.8 | 4.058 | 58.8 |
| -10 | 14 | 582.6 | 5.826 | 84.5 |
| 0 | 32 | 813.1 | 8.131 | 117.9 |
| 10 | 50 | 1106.9 | 11.069 | 160.5 |
| 20 | 68 | 1474.6 | 14.746 | 213.9 |
| 30 | 86 | 1927.5 | 19.275 | 279.6 |
| 40 | 104 | 2478.3 | 24.783 | 359.4 |
| 50 | 122 | 3141.2 | 31.412 | 455.6 |
| 60 | 140 | 3933.2 | 39.332 | 570.5 |
| 70 | 158 | 4876.8 | 48.768 | 707.3 |
How to verify any row in FluidTool
- Open FluidTool with R32 selected: /?fluid=R32
- Choose a Two-phase input pair (Temperature & Quality / T + Q).
- Set Q=0 and enter the temperature from the table to read Psat.
Related
- R32 data sheet: basic identifiers and thermodynamic context.
- Refrigerant PT chart: what Tsat(P)/Psat(T) means and common pitfalls.
- Superheat & Subcooling: interpret measured line temperature vs saturation temperature.