Temperature/pressure relationship
In a partially charged refrigerant container, refrigerant gas comes to the surface, which under particle formation becomes fluid. This occurs under pressure and is know as gas pressure. Similar to R-12 refrigerant, the gas pressure of R-134a is temperature dependent.
| Temperature in °C ( °F) | Pressure in bar (psi) |
|---|
| 30 (-22) | 0.0 (0.0) |
| 20 (-4) | 0.3 (4.4) |
| 10 (14) | 1.0 (14.5) |
| 0 (32) | 1.9 (27.5) |
| 10 (50) | 3.1 (45.0) |
| 20 (68) | 4.7 (68.2) |
| 30 (86) | 6.7 (97.2) |
| 40 (104) | 9.1 (132.0) |
| 50 (122) | 12.2 (177.0) |
| 60 (140) | 15.8 (229.2) |
| 70 (158) | 20.2 (293.0) |
| WARNING | Paint repairs on vehicles with A/C: While performing body/paint repairs involving the use of preheating or drying ovens, do not expose any component of the A/C system to temperatures above 80 °C/176 °F. Excessive heat will cause a pressure increase which could burst the system. Temperature/pressure chart. Refer to Pressure and temperature specifications . |
