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.
An R407C pressure temperature chart (PT chart) is a saturation lookup for R407C in the two-phase region. R407C is a zeotropic blend, which means it typically has noticeable temperature glide. As a result, saturation can be represented by two endpoints: bubble and dew.
Bubble vs dew (important for R407C)
For blends with glide, there is not a single Tsat at a pressure or Psat at a temperature. Instead:
- Bubble point is the liquid-side saturation endpoint (often mapped with Q=0).
- Dew point is the vapor-side saturation endpoint (often mapped with Q=1).
If you are comparing values across sources, always confirm whether they are using bubble or dew.
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).
R407C saturation pressure vs temperature (reference tables)
Generated using CoolProp (the same property engine used by FluidTool). For R407C we include 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 | 279.9 | 214.7 | 2.799 | 2.147 | 40.6 | 31.1 |
| -10 | 14 | 404.7 | 319.8 | 4.047 | 3.198 | 58.7 | 46.4 |
| 0 | 32 | 567.9 | 460.7 | 5.679 | 4.607 | 82.4 | 66.8 |
| 10 | 50 | 776.4 | 644.9 | 7.764 | 6.449 | 112.6 | 93.5 |
| 20 | 68 | 1037.6 | 880.3 | 10.376 | 8.803 | 150.5 | 127.7 |
| 30 | 86 | 1359.0 | 1175.8 | 13.590 | 11.758 | 197.1 | 170.5 |
| 40 | 104 | 1748.9 | 1541.2 | 17.489 | 15.412 | 253.7 | 223.5 |
| 50 | 122 | 2215.9 | 1987.6 | 22.159 | 19.876 | 321.4 | 288.3 |
| 60 | 140 | 2769.4 | 2528.6 | 27.694 | 25.286 | 401.7 | 366.7 |
| 70 | 158 | 3419.7 | 3182.2 | 34.197 | 31.822 | 496.0 | 461.5 |
How to verify in FluidTool
- Open FluidTool with R407C selected: /?fluid=R407C
- 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.
For interpretation with real line measurements, combine saturation with superheat/subcooling concepts. This page is educational and does not provide diagnostic target pressures.
Related
- R407C data sheet: basic identifiers and thermodynamic context.
- Refrigerant PT chart: how PT charts are used and misused in practice.
- R410A PT chart (bubble/dew): a blend with much smaller glide (near-azeotropic).
- Back to Wiki
- Open the tool
R404A pressure temperature chart (PT)
R404A saturation pressure vs temperature (PT chart): CoolProp-generated bubble and dew reference tables in kPa(a), bar(a), and psi(a), with safe interpretation notes.
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.