REFRIGERANT PRESSURE-TEMPERATURE CHART
The following table is a comparison of operating pressures for the most common refrigerants and can be used for determining which copper tube size is required. This is a guide only, the refrigerant manufacturer should be consulted for more specific information.
| Refrigerant | Saturated Vapour Pressures (psi) | |||||
|---|---|---|---|---|---|---|
| -20°C | 0°C | 20°C | 40°C | 60°C | 70°C | |
| R22 | 21 | 58 | 117 | 208 | 337 | 418 |
| R32 | 44 | 103 | 199 | 345 | 555 | 693 |
| R134A | 6 | 28 | 68 | 133 | 229 | 292 |
| R404A | 28 | 72 | 143 | 251 | 404 | |
| R407C | 26 | 68 | 136 | 239 | 387 | 481 |
| R410A | 44 | 102 | 196 | 339 | 544 | 671 |