R410A pressure temperature chart (PT)
R410A saturation pressure vs temperature (PT chart): CoolProp-generated bubble and dew reference tables in kPa(a), bar(a), and psi(a), with guidance on temperature glide and safe interpretation.
An R410A pressure temperature chart (PT chart) is a saturation lookup: it relates temperature and saturation pressure for R410A in the two-phase region. Because R410A is a refrigerant blend, saturation can involve bubble and dew endpoints. For R410A the difference is typically small (near-azeotropic), but the concept still matters when comparing tools, charts, or procedures.
Bubble vs dew (why blends can have two PT curves)
For many blends, the phase change happens over a temperature range (temperature glide). A common convention is:
- Bubble point: where the first vapor bubble appears during boiling (often mapped with Q=0).
- Dew point: where the first liquid droplet appears during condensation (often mapped with Q=1).
Learn more: Bubble vs Dew (Temperature Glide) and Zeotropic vs Azeotropic.
Pressure basis: absolute vs gauge
The tables below use absolute pressure (kPa(a), bar(a), psi(a)). Many field gauges display gauge pressure (relative to ambient). Converting requires local atmospheric pressure:
Pabs = Pgauge + Patm
Learn more: Gauge vs absolute pressure (psig vs psia).
R410A saturation pressure vs temperature (reference tables)
Generated using CoolProp (the same property engine used by FluidTool). For blends, we provide both endpoints: bubble (Q=0) and dew (Q=1).
| T ( deg C) | T ( deg F) | Psat bubble (kPa(a)) | Psat dew (kPa(a)) | Bubble (bar(a)) | Dew (bar(a)) | Bubble (psi(a)) | Dew (psi(a)) |
|---|---|---|---|---|---|---|---|
| -20 | -4 | 400.7 | 399.3 | 4.007 | 3.993 | 58.1 | 57.9 |
| -10 | 14 | 574.6 | 572.7 | 5.746 | 5.727 | 83.3 | 83.1 |
| 0 | 32 | 800.7 | 798.1 | 8.007 | 7.981 | 116.1 | 115.8 |
| 10 | 50 | 1088.3 | 1084.8 | 10.883 | 10.848 | 157.8 | 157.3 |
| 20 | 68 | 1447.5 | 1442.9 | 14.475 | 14.429 | 209.9 | 209.3 |
| 30 | 86 | 1889.1 | 1883.4 | 18.891 | 18.834 | 274.0 | 273.2 |
| 40 | 104 | 2425.6 | 2418.6 | 24.256 | 24.186 | 351.8 | 350.8 |
| 50 | 122 | 3071.1 | 3063.0 | 30.711 | 30.630 | 445.4 | 444.2 |
| 60 | 140 | 3842.6 | 3834.8 | 38.426 | 38.348 | 557.3 | 556.2 |
| 70 | 158 | 4763.9 | 4761.7 | 47.639 | 47.617 | 690.9 | 690.6 |
How to verify in FluidTool
- Open FluidTool with R410A selected: /?fluid=R410A
- Choose a Two-phase input pair (Temperature & Quality / T + Q).
- Set Q=0 to reproduce the bubble column, or Q=1 to reproduce the dew column.
If you are using pressures and line temperatures from a running system, combine saturation with superheat/subcooling concepts. This page is educational and does not provide diagnostic target pressures.
Related
- R410A data sheet: basic identifiers and thermodynamic context.
- Refrigerant PT chart: how PT charts are used and misused in practice.
- R32 PT chart: a saturation reference for R32 (pure fluid).
- Back to Wiki
- Open the tool
R407C pressure temperature chart (PT)
R407C saturation pressure vs temperature (PT chart): CoolProp-generated bubble and dew reference tables in kPa(a), bar(a), and psi(a), with guidance on temperature glide and safe interpretation.
R410A vs R32
A high-level comparison of R410A and R32 for HVAC/heat pump contexts, with safety, policy, and engineering caveats.