Refrigerant Vapor Pressure Table
WARNING: This page is about a different car, the 2023 Volkswagen Atlas. However, it is still accessible from the selected car via links, so may be relevant.
For each refrigerant there is a specific vapor pressure table. This table makes it possible to determine the vapor pressure acting on the column of liquid in a reservoir if the temperature of the reservoir is known.
- In terms of absolute pressure, "0 bar" corresponds to an absolute vacuum. Normal ambient pressure (positive pressure) corresponds to "1 bar" absolute pressure. "0 bar" pressure corresponds to an absolute pressure of one bar on most pressure gauges (indicated for example by "-1" bar below "0").
- Pressure is measured in different units: 1 MPa (mega Pascal) corresponds to 10 bar positive pressure or 145 psi. 1 bar absolute pressure corresponds to 0 bar positive pressure and thus to the ambient pressure (atmospheric pressure).
| Temperature in °C (°F) | Pressure in (Positive Pressure) Of R1234yf |
|---|---|
| -40 (-40 °F) | -0.40 (-5.80 psi) |
| -30 (-22 °F) | -0.01 (-0.15 psi) |
| -25 (-13 °F) | 0.12 (1.74 psi) |
| -20 (-4 °F) | 0.50 (7.25 psi) |
| -15 (5 °F) | 0.83 (12.04 psi) |
| -10 (14 °F) | 1.21 (17.55 psi) |
| -5 (23 °F) | 1.65 (23.93 psi) |
| 0 (32 °F) | 2.15 (31.18 psi) |
| 5 (41 °F) | 2.72 (39.89 psi) |
| 10 (50 °F) | 3.36 (48.73 psi) |
| 15 (59 °F) | 4.09 (59.32 psi) |
| 20 (68 °F) | 4.90 (71.07 psi) |
| 25 (77 °F) | 5.81 (84.27 psi) |
| 30 (86 °F) | 6.82 (97.32 psi) |
| 35 (95 °F) | 7.93 (115.01 psi) |
| 40 (104 °F) | 9.17 (133 psi) |
| 45 (113 °F) | 10.52 (152.58 psi) |
| 50 (122 °F) | 12.01 (174.19 psi) |
| 55 (131 °F) | 13.64 (197.83 psi) |
| 60 (140 °F) | 15.41 (223.50 psi) |
| 65 (149 °F) | 17.35 (251.64 psi) |
| 70 (158 °F) | 19.46 (282.24 psi) |
| 75 (167 °F) | 21.75 (315.46 psi) |
| 80 (176 °F) | 24.24 (351.57 psi) |
| 85 (185 °F) | 26.94 (390.73 psi) |
| 90 (194 °F) | 29.09 (421.91 psi) |