R22 PT Chart: Pressure Temperature Chart For -60°F To +155°F

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.

measuring r22 pressure on a hot day
Measuring R22 pressure on a hot day in our air conditioner.

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.

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 -31.7°C 210.8 psig
110°F -31.7°C 226.4 psig
115°F -31.7°C 242.8 psig
120°F -31.7°C 260 psig
125°F -31.7°C 278 psig
130°F -31.7°C 296.9 psig
135°F -31.7°C 316.7 psig
140°F -31.7°C 337.4 psig
145°F -31.7°C 359.0 psig
150°F -31.7°C 381.7 psig
155°F -31.7°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.

Hopefully, you now have enough information about R22 pressures at different temperatures.

You can check a similar table of an R410A RT chart here.

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