R-290 Pressure Temperature Chart
Saturation pressure (PSIG) for R-290 (propane) at temperatures from -40°F to 120°F. A natural refrigerant with ultra-low GWP.
| Temp (°F) | Pressure (PSIG) |
|---|---|
| -40°F | -1.0 vac |
| -20°F | 12.6 |
| 0°F | 30.3 |
| 20°F | 53.3 |
| 40°F | 82.5 |
| 60°F | 119.3 |
| 80°F | 165.0 |
| 100°F | 221.1 |
| 120°F | 289.5 |
Frequently Asked Questions
What is the saturation pressure of R-290 at 40°F?
At 40°F, R-290 has a saturation pressure of 82.5 PSIG.
What is R-290?
R-290 is propane used as a refrigerant. It is a natural hydrocarbon refrigerant with a GWP of only 3, making it one of the most environmentally friendly options available. It is used in small commercial refrigeration, vending machines, and increasingly in residential heat pumps.
Is R-290 safe to use in HVAC systems?
R-290 is classified as A3 (highly flammable), so it requires specific safety measures, charge limits, and equipment designed for flammable refrigerants. UL 60335-2-40 sets charge limits and safety requirements. Technicians must follow all applicable codes and use proper leak detection equipment.