PT chart · ASHRAE A1
R-404A PT Chart
R-404A pressure–temperature chart in psig and °F/°C. Low and medium-temp commercial refrigeration.
Vacuum readings are shown in inches of mercury (″ Hg) below atmospheric pressure.
| °F | °C | Pressure, psig |
|---|---|---|
| -50 | -45.6 | 0.5 |
| -45 | -42.8 | 2.6 |
| -40 | -40.0 | 4.9 |
| -35 | -37.2 | 7.5 |
| -30 | -34.4 | 10.3 |
| -25 | -31.7 | 13.4 |
| -20 | -28.9 | 16.8 |
| -15 | -26.1 | 20.5 |
| -10 | -23.3 | 24.6 |
| -5 | -20.6 | 28.9 |
| 0 | -17.8 | 33.7 |
| 5 | -15.0 | 38.8 |
| 10 | -12.2 | 44.3 |
| 15 | -9.4 | 50.2 |
| 20 | -6.7 | 56.6 |
| 25 | -3.9 | 63.4 |
| 30 | -1.1 | 70.7 |
| 35 | 1.7 | 78.6 |
| 40 | 4.4 | 86.9 |
| 45 | 7.2 | 95.8 |
| 50 | 10.0 | 105.3 |
| 55 | 12.8 | 115.3 |
| 60 | 15.6 | 126.0 |
| 65 | 18.3 | 137.3 |
| 70 | 21.1 | 149.3 |
| 75 | 23.9 | 162.0 |
| 80 | 26.7 | 175.4 |
| 85 | 29.4 | 189.5 |
| 90 | 32.2 | 204.5 |
| 95 | 35.0 | 220.2 |
| 100 | 37.8 | 236.8 |
| 105 | 40.6 | 254.2 |
| 110 | 43.3 | 272.5 |
| 115 | 46.1 | 291.8 |
| 120 | 48.9 | 312.1 |
| 125 | 51.7 | 333.3 |
| 130 | 54.4 | 355.7 |
| 135 | 57.2 | 379.1 |
| 140 | 60.0 | 403.7 |
| 145 | 62.8 | 429.6 |
| 150 | 65.6 | 456.8 |
Source: Arkema Forane® Pressure Temperature Chart (PPC/SDC 05-2025). Reference only; verify against the equipment manufacturer's data.
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