R22 PT chart describes the relationship between temperature and pressure. Namely, it tells you what is the pressure of R22 refrigerant gas at different temperatures.
Example: What are R22 pressures on an 85-degree day? You simply consult the R22 RT chart below and see that at 85°F, the pressure of R22 is 155.7 psig. psig or ‘pounds per square inch gauge’ is a pressure unit we usually in refrigerant temperature pressure charts.
After the PT chart for R22 refrigerant liquid gas, we will look at more of these examples. We will also describe some of the other physical properties of R22 like liquid and gas density, triple point temperature, critical pressure, and heat capacity ratio. We will also explain why R22 is found only in older HVAC devices and is currently being phased out.
At the end, we also include a printable R22 PT chart in pdf version; you can print it out and use it on-site.
Note: Most common name for this refrigerant is R22, but we can also use HCFC-22, CHCIF2, or chlorodifluoromethane when referencing this particular refrigerant.
Here is the full R22 pressure chart from the low side (-60°F) all the way to the high side (155°F):
R22 Pressure Temperature Chart
| Temperature (°F): | Temperature (°C): | Pressure (psig): |
| -60°F | -51.1°C | 11.9 psig |
| -55°F | -48.3°C | 9.2 psig |
| -50°F | -45.6°C | 6.1 psig |
| -49°F | -45.0°C | 5.4 psig |
| -48°F | -44.4°C | 4.8 psig |
| -47°F | -43.9°C | 4.1 psig |
| -46°F | -43.3°C | 3.4 psig |
| -45°F | -42.8°C | 2.7 psig |
| -44°F | -42.2°C | 1.9 psig |
| -43°F | -41.7°C | 1.2 psig |
| -42°F | -41.1°C | 0.4 psig |
| -41°F | -40.6°C | 0.2 psig |
| -40°F | -40.0°C | 0.6 psig |
| -39°F | -39.4°C | 1.0 psig |
| -38°F | -38.9°C | 1.4 psig |
| -37°F | -38.3°C | 1.8 psig |
| -36°F | -37.8°C | 2.2 psig |
| -35°F | -37.2°C | 2.6 psig |
| -34°F | -36.7°C | 3.1 psig |
| -33°F | -36.1°C | 3.5 psig |
| -32°F | -35.6°C | 4.0 psig |
| -31°F | -35.0°C | 4.5 psig |
| -30°F | -34.4°C | 4.9 psig |
| -29°F | -33.9°C | 5.4 psig |
| -28°F | -33.3°C | 5.9 psig |
| -27°F | -32.8°C | 6.4 psig |
| -26°F | -32.2°C | 6.9 psig |
| -25°F | -31.7°C | 7.4 psig |
| -24°F | -31.1°C | 8.0 psig |
| -23°F | -30.6°C | 8.5 psig |
| -22°F | -30.0°C | 9.1 psig |
| -21°F | -29.4°C | 9.6 psig |
| -20°F | -28.9°C | 10.2 psig |
| -19°F | -28.3°C | 10.8 psig |
| -18°F | -27.8°C | 11.4 psig |
| -17°F | -27.2°C | 12.0 psig |
| -16°F | -26.7°C | 12.6 psig |
| -15°F | -26.1°C | 13.2 psig |
| -14°F | -25.6°C | 13.9 psig |
| -13°F | -25.0°C | 14.5 psig |
| -12°F | -24.4°C | 15.2 psig |
| -11°F | -23.9°C | 15.9 psig |
| -10°F | -23.3°C | 16.5 psig |
| -9°F | -22.8°C | 17.2 psig |
| -8°F | -22.2°C | 17.9 psig |
| -7°F | -21.7°C | 18.7 psig |
| -6°F | -21.1°C | 19.4 psig |
| -5°F | -20.6°C | 20.1 psig |
| -4°F | -20.0°C | 20.9 psig |
| -3°F | -19.4°C | 21.7 psig |
| -2°F | -18.9°C | 22.4 psig |
| -1°F | -18.3°C | 23.2 psig |
| 0°F | -17.8°C | 24.0 psig |
| 1°F | -17.2°C | 24.9 psig |
| 2°F | -16.7°C | 25.7 psig |
| 3°F | -16.1°C | 26.5 psig |
| 4°F | -15.6°C | 27.4 psig |
| 5°F | -15.0°C | 28.3 psig |
| 6°F | -14.4°C | 29.2 psig |
| 7°F | -13.9°C | 30.1 psig |
| 8°F | -13.3°C | 31.0 psig |
| 9°F | -12.8°C | 31.9 psig |
| 10°F | -12.2°C | 32.8 psig |
| 11°F | -11.7°C | 33.8 psig |
| 12°F | -11.1°C | 34.8 psig |
| 13°F | -10.6°C | 35.8 psig |
| 14°F | -10.0°C | 36.8 psig |
| 15°F | -9.4°C | 37.8 psig |
| 16°F | -8.9°C | 38.8 psig |
| 17°F | -8.3°C | 39.9 psig |
| 18°F | -7.8°C | 40.9 psig |
| 19°F | -7.2°C | 42.0 psig |
| 20°F | -6.7°C | 43.1 psig |
| 21°F | -6.1°C | 44.2 psig |
| 22°F | -5.6°C | 45.3 psig |
| 23°F | -5.0°C | 46.5 psig |
| 24°F | -4.4°C | 47.6 psig |
| 25°F | -3.9°C | 48.8 psig |
| 26°F | -3.3°C | 50.0 psig |
| 27°F | -2.8°C | 51.2 psig |
| 28°F | -2.2°C | 52.4 psig |
| 29°F | -1.7°C | 53.7 psig |
| 30°F | -1.1°C | 55.0 psig |
| 31°F | -0.6°C | 56.2 psig |
| 32°F | 0°C | 57.5 psig |
| 33°F | 0.6°C | 58.8 psig |
| 34°F | 1.1°C | 60.2 psig |
| 35°F | 1.7°C | 61.5 psig |
| 36°F | 2.2°C | 62.9 psig |
| 37°F | 2.8°C | 64.3 psig |
| 38°F | 3.3°C | 65.7 psig |
| 39°F | 3.9°C | 67.1 psig |
| 40°F | 4.4°C | 68.6 psig |
| 41°F | 5.0°C | 70.0 psig |
| 42°F | 5.6°C | 71.5 psig |
| 43°F | 6.1°C | 73.0 psig |
| 44°F | 6.7°C | 74.5 psig |
| 45°F | 7.2°C | 76.1 psig |
| 46°F | 7.8°C | 77.6 psig |
| 47°F | 8.3°C | 79.2 psig |
| 48°F | 8.9°C | 80.8 psig |
| 49°F | 9.4°C | 82.4 psig |
| 50°F | 10.0°C | 84.1 psig |
| 51°F | 10.6°C | 85.7 psig |
| 52°F | 11.1°C | 87.4 psig |
| 53°F | 11.7°C | 89.1 psig |
| 54°F | 12.2°C | 90.8 psig |
| 55°F | 12.8°C | 92.6 psig |
| 56°F | 13.3°C | 94.4 psig |
| 57°F | 13.9°C | 96.1 psig |
| 58°F | 14.4°C | 98.0 psig |
| 59°F | 15.0°C | 99.8 psig |
| 60°F | 15.6°C | 101.6 psig |
| 61°F | 16.1°C | 103.5 psig |
| 62°F | 16.7°C | 105.4 psig |
| 63°F | 17.2°C | 107.3 psig |
| 64°F | 17.8°C | 109.3 psig |
| 65°F | 18.3°C | 111.3 psig |
| 66°F | 18.9°C | 113.2 psig |
| 67°F | 19.4°C | 115.3 psig |
| 68°F | 20.0°C | 117.3 psig |
| 69°F | 20.6°C | 119.4 psig |
| 70°F | 21.1°C | 121.4 psig |
| 71°F | 21.7°C | 123.6 psig |
| 72°F | 22.2°C | 125.7 psig |
| 73°F | 22.8°C | 127.8 psig |
| 74°F | 23.3°C | 130.0 psig |
| 75°F | 23.9°C | 132.2 psig |
| 76°F | 24.4°C | 134.5 psig |
| 77°F | 25.0°C | 136.7 psig |
| 78°F | 25.6°C | 139.0 psig |
| 79°F | 26.1°C | 141.3 psig |
| 80°F | 26.7°C | 143.6 psig |
| 81°F | 27.2°C | 146.0 psig |
| 82°F | 27.8°C | 148.4 psig |
| 83°F | 28.3°C | 150.8 psig |
| 84°F | 29.4°C | 153.2 psig |
| 85°F | 30.0°C | 155.7 psig |
| 86°F | 30.6°C | 158.2 psig |
| 87°F | 31.1°C | 160.7 psig |
| 88°F | 31.7°C | 163.2 psig |
| 89°F | 31.7°C | 165.8 psig |
| 90°F | 32.2°C | 168.4 psig |
| 91°F | 32.8°C | 171.0 psig |
| 92°F | 33.3°C | 173.7 psig |
| 93°F | 33.9°C | 176.4 psig |
| 94°F | 34.4°C | 179.1 psig |
| 95°F | 35.0°C | 181.8 psig |
| 96°F | 35.6°C | 184.6 psig |
| 97°F | 36.1°C | 187.4 psig |
| 98°F | 36.7°C | 190.2 psig |
| 99°F | 37.2°C | 193.0 psig |
| 100°F | 37.8°C | 195.9 psig |
| 105°F | 40.6°C | 210.8 psig |
| 110°F | 43.3°C | 226.4 psig |
| 115°F | 46.1°C | 242.8 psig |
| 120°F | 48.9°C | 260 psig |
| 125°F | 51.7°C | 278 psig |
| 130°F | 54.4°C | 296.9 psig |
| 135°F | 57.2°C | 316.7 psig |
| 140°F | 60.0°C | 337.4 psig |
| 145°F | 62.8°C | 359.0 psig |
| 150°F | 65.6°C | 381.7 psig |
| 155°F | 68.3°C | 405.4 psig |
With this R22 PT chart, you can check what pressure R22 refrigerant is at all relevant temperatures.
What Are Normal Operating Pressures For R22?
We have a low and high operating pressure for R22. Normal operating pressures for R22 are between 260 psig (at 120°F) and 76 psig (at 45°F). The high-end pressure is measured at condensing temperature and the low-end pressure is measured at evaporator saturation temperature.
Beyond this pressure window, you have an R22 pressure chart for the high and low side above. At the low side, the R22 pressure can fall below 10 psid+g. At the high side, the operating pressures of R22 can reach above 300 psig.
Let’s check some examples of what the pressure of R22 is at various temperatures:
R22 Pressures On A 65-Degree Day?
On a 65°F day, the pressure of R22 is 111.3 psig. This is within the normal operating pressure for an R22 refrigerant.
R22 Pressures On A 70-Degree Day?
On a 70°F day, the pressure of R22 is 111.3 psig.
R22 Pressures On A 75-Degree Day?
On a 75°F day, the pressure of R22 is 132.2 psig.
R22 Pressures On A 80-Degree Day?
On an 80°F day, the pressure of R22 is 143.6 psig.
R22 Pressures On A 85-Degree Day?
On an 85°F day, the pressure of R22 is 155.7 psig.
R22 Pressures On A 90-Degree Day?
On a 90°F day, the pressure of R22 is 168.4 psig.
R22 Pressures On A 95-Degree Day?
On a 95°F day, the pressure of R22 is 181.8 psig.
R22 Pressures On A 100-Degree Day?
On a 100°F day, the pressure of R22 is 195.9 psig.
Needless to say, the temperature of the R22 in the refrigerant lines can be higher than the day’s temperature.
Physical Properties Of R22
In parallel to using the R22 PT chart, professionals will usually need to know some of the following R22 physical properties:
- R22 liquid density at -69°C: 1.49 g/cm3.
- R22 gas density at 15°C: 3.66 kg/m3.
- Triple point temperature: -115.76K.
- Critical pressure: 49.36 bar.
- Heat capacity ratio at 86°F: 1.178253
Note Of R22 Phasing Out
R22 is slowly phasing out. You will find this refrigerant in many older HVAC devices such as air conditioners and refrigerators. However, the chemical molecule (difluoromonochloromethane) itself is an organofluorine and therefore dangerous to the environment, having ozone depletion potential and high global warming potential.
The phasing out of R22 is happening according to the Montreal protocol. This protocol states that in developed countries like USA and Europe, the R22 will be phased out in 2020. In undeveloped countries, the phasing out deadline is 2030.
R22 PT Chart PDF (Printable PDF For On-Site Use)
As promised, you can get the printable PDF version of R22 PT chart here if you need it on-site:
Hopefully, you now have enough information about R22 pressures at different temperatures.
You can check a similar table for:
Really it is a fruitful information