Pressure-Temperature Charts
Saturation P-T data for common refrigerants
Select Refrigerant
Low GWP (HFO)
Pressure Unit
R-744 (CO2)
Pure
GWP:
1
ODP:
0
Safety Class:
A1
Natural refrigerant with ultra-low GWP. Operates at very high pressures (transcritical above 31.1°C). Non-flammable and non-toxic (A1). Requires specialized high-pressure equipment. Commonly used in supermarket cascade systems and heat pumps.
Quick P-T Lookup
bar
* Results are interpolated from the P-T table data
Pressure Units: psig = Gauge pressure (relative to atmosphere) kPa / bar / kgf/cm² = Absolute pressure
| °C | °F | bar |
|---|---|---|
| -50 | -58 | 6.8 |
| -45 | -49 | 8.1 |
| -40 | -40 | 9.7 |
| -35 | -31 | 11.5 |
| -30 | -22 | 13.6 |
| -25 | -13 | 15.9 |
| -20 | -4 | 18.5 |
| -15 | 5 | 21.4 |
| -10 | 14 | 24.6 |
| -5 | 23 | 28.2 |
| 0 | 32 | 32.2 |
| 5 | 41 | 36.6 |
| 10 | 50 | 41.4 |
| 15 | 59 | 46.7 |
| 20 | 68 | 52.6 |
| 25 | 77 | 59.0 |
| 30 | 86 | 66.1 |
| 31 | 88 | 67.1 |