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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.

Use the interactive PT chart with calculator →
Temp (°F)Pressure (PSIG)
-40°F-1.0 vac
-20°F12.6
0°F30.3
20°F53.3
40°F82.5
60°F119.3
80°F165.0
100°F221.1
120°F289.5

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.

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