R454B PT Chart: Pressures At -40°F To 150°F Temperatures

R454B refrigerant pressure chart tells you what are pressures of R454B at -40°F to 150°F temperatures. If you know the temperature, you can use the R454B PT chart to determine the pressure. If you know the pressure of R454B (between 8.8 psig and 581.4 psig), you can also use the chart to determine the temperature of the refrigerant.

You will find two useful resources here, namely:

  • Online R454B pressure temperature chart spanning from -40°F to 150°F temp.
  • Printable PDF version of R454B PT chart you can take with you on the job.

There are several brand names for R454B: Opteon XL41, Solstice 454B, and Puron Advance. This is a blend of R32 (68.9%) and R1234yf (31.1%). It has a very low boiling point of -59.5°F (-50.9°C). That’s why is primarily used in air conditioners. Note: Due to very low boiling point, pressures of liquid R454B refrigerant exceeds 300 psig on 100-degree days.

You can use the R454B refrigerant PT chart for:

  • Checking operating pressures of R454B.
  • Check what pressures should R454B have on 65-degree, 70-degree, 75-degree, 80-degree, 85-degree, 90-degree, 95-degree, 100-degree days, and so on. We will solve 8 examples for 65-100 degree days to illustrate how to use the PT chart.
  • Figure out if the AC line set or a reusable freon bottle contains R454B  refrigerant.
  • Differentiate between R454B and other refrigerants, like R22, R410a, and so on.
  • Use it to calculate the required R454B superheat and total superheat. For superheat, you will need to know R454B vapor pressures (3rd column in the chart).
  • Use it to calculate the required R454B subcooling. For subcooling, you will need to use the R454B liquid pressure (4th column in the chart).

Note: When measuring pressures, the R454B refrigerant has to be in a saturated state (mixture of liquid and vapor). That’s why you have to turn the air conditioner off and wait for the refrigerant to equalize. That means that the pressure of R454B is the same on the high side and low side. When measuring pressures on a running AC unit, be aware that the saturated state only exists at the evaporator and condenser (compressor contains vapor, TXV valve contains liquid).

With this in mind, let’s have a look at the R454B PT chart and the 8 temperature examples (at the end you will also find a printable PDF version):

454B Pressure Temperature Chart

Temperature (°F): Temperature (°C): R454B Liquid Pressure (psig): R454B Vapor Pressure (psig):
-40°F -40.0°C 9.9 psig 8.8 psig
-39°F -39.4°C 10.4 psig 9.4 psig
-38°F -38.9°C 11.2 psig 10.0 psig
-37°F -38.3°C 11.8 psig 10.6 psig
-36°F -37.8°C 12.5 psig 11.2 psig
-35°F -37.2°C 13.2 psig 11.9 psig
-34°F -36.7°C 13.8 psig 12.5 psig
-33°F -36.1°C 15.4 psig 13.2 psig
-32°F -35.6°C 15.3 psig 13.9 psig
-31°F -35.0°C 16.0 psig 14.6 psig
-30°F -34.4°C 16.7 psig 15.3 psig
-29°F -33.9°C 17.5 psig 16.0 psig
-28°F -33.3°C 18.2  psig 16.7  psig
-27°F -32.8°C 19.0 psig 17.5 psig
-26°F -32.2°C 19.8 psig 18.2 psig
-25°F -31.7°C 20.6 psig 19.0 psig
-24°F -31.1°C 21.4 psig 19.8 psig
-23°F -30.6°C 22.3 psig 20.6 psig
-22°F -30.0°C 23.1 psig 21.4 psig
-21°F -29.4°C 24.0 psig 22.2 psig
-20°F -28.9°C 24.9 psig 23.0 psig
-19°F -28.3°C 25.8 psig 23.9 psig
-18°F -27.8°C 26.7 psig 24.8 psig
-17°F -27.2°C 27.6 psig 25.7 psig
-16°F -26.7°C 28.6 psig 26.6 psig
-15°F -26.1°C 29.5 psig 27.5 psig
-14°F -25.6°C 30.5 psig 28.4 psig
-13°F -25.0°C 31.5 psig 29.4 psig
-12°F -24.4°C 32.5 psig 30.3 psig
-11°F -23.9°C 33.5 psig 31.3 psig
-10°F -23.3°C 34.6 psig 32.3 psig
-9°F -22.8°C 35.7 psig 33.3 psig
-8°F -22.2°C 36.7 psig 34.4 psig
-7°F -21.7°C 37.8 psig 35.4 psig
-6°F -21.1°C 39.0 psig 36.5 psig
-5°F -20.6°C 40.1 psig 37.6 psig
-4°F -20.0°C 41.2 psig 38.7 psig
-3°F -19.4°C 42.4 psig 39.8 psig
-2°F -18.9°C 43.6 psig 40.9 psig
-1°F -18.3°C 44.8 psig 42.1 psig
0°F -17.8°C 46.1 psig 43.3 psig
1°F -17.2°C 47.3 psig 44.5 psig
2°F -16.7°C 48.6 psig 45.7 psig
3°F -16.1°C 49.9 psig 46.9 psig
4°F -15.6°C 51.2 psig 48.1 psig
5°F -15.0°C 52.5 psig 49.4 psig
6°F -14.4°C 53.8 psig 50.7 psig
7°F -13.9°C 55.2 psig 52.0 psig
8°F -13.3°C 56.6 psig 53.3 psig
9°F -12.8°C 58.0 psig 54.7 psig
10°F -12.2°C 59.5 psig 56.1 psig
11°F -11.7°C 60.9 psig 57.5 psig
12°F -11.1°C 62.4 psig 58.9 psig
13°F -10.6°C 63.9 psig 60.3 psig
14°F -10.0°C 65.4 psig 61.8 psig
15°F -9.4°C 66.9 psig 63.2 psig
16°F -8.9°C 68.5 psig 64.7 psig
17°F -8.3°C 70.1 psig 66.2 psig
18°F -7.8°C 71.7 psig 67.8 psig
19°F -7.2°C 73.3 psig 69.3 psig
20°F -6.7°C 75.0 psig 70.9 psig
21°F -6.1°C 76.7 psig 72.5 psig
22°F -5.6°C 78.4 psig 74.2 psig
23°F -5.0°C 80.1 psig 75.8 psig
24°F -4.4°C 81.8 psig 77.5 psig
25°F -3.9°C 83.6 psig 79.2 psig
26°F -3.3°C 85.4 psig 80.9 psig
27°F -2.8°C 87.2 psig 82.7 psig
28°F -2.2°C 89.1 psig 84.4 psig
29°F -1.7°C 91.0 psig 86.2 psig
30°F -1.1°C 92.9 psig 88.1 psig
31°F -0.6°C 94.8 psig 89.9 psig
32°F 0°C 96.8 psig 91.8 psig
33°F 0.6°C 98.7 psig 93.7 psig
34°F 1.1°C 100.7 psig 95.6 psig
35°F 1.7°C 102.8 psig 97.6 psig
36°F 2.2°C 104.8 psig 99.5 psig
37°F 2.8°C 106.9 psig 101.5 psig
38°F 3.3°C 109.0 psig 103.6 psig
39°F 3.9°C 111.2 psig 105.6 psig
40°F 4.4°C 113.3 psig 107.7 psig
41°F 5.0°C 115.5 psig 109.8 psig
42°F 5.6°C 117.8 psig 112.0 psig
43°F 6.1°C 120.0 psig 114.1 psig
44°F 6.7°C 122.3 psig 116.3 psig
45°F 7.2°C 124.6 psig 118.5 psig
46°F 7.8°C 126.9 psig 120.8 psig
47°F 8.3°C 129.3 psig 123.1 psig
48°F 8.9°C 131.7 psig 125.4 psig
49°F 9.4°C 134.1 psig 127.7 psig
50°F 10.0°C 136.6 psig 130.1 psig
51°F 10.6°C 139.1 psig 132.5 psig
52°F 11.1°C 141.6 psig 134.9 psig
53°F 11.7°C 144.2 psig 137.3 psig
54°F 12.2°C 146.7 psig 139.8 psig
55°F 12.8°C 149.4 psig 142.3 psig
56°F 13.3°C 152.0 psig 144.9 psig
57°F 13.9°C 154.7 psig 147.5 psig
58°F 14.4°C 157.4 psig 150.1 psig
59°F 15.0°C 160.1 psig 152.7 psig
60°F 15.6°C 162.9 psig 155.4 psig
61°F 16.1°C 165.7 psig 158.1 psig
62°F 16.7°C 168.6 psig 160.8 psig
63°F 17.2°C 171.4 psig 163.6 psig
64°F 17.8°C 174.3 psig 166.4 psig
65°F 18.3°C 177.3 psig 169.3 psig
66°F 18.9°C 180.2 psig 172.1 psig
67°F 19.4°C 183.2 psig 175.1 psig
68°F 20.0°C 186.3 psig 178.0 psig
69°F 20.6°C 189.4 psig 181.0 psig
70°F 21.1°C 192.5 psig 184.0 psig
71°F 21.7°C 195.6 psig 187.0 psig
72°F 22.2°C 198.8 psig 190.1 psig
73°F 22.8°C 202.0 psig 193.2 psig
74°F 23.3°C 205.3 psig 196.4 psig
75°F 23.9°C 208.6 psig 199.6 psig
76°F 24.4°C 211.9 psig 202.8 psig
77°F 25.0°C 215.3 psig 206.0 psig
78°F 25.6°C 218.7 psig 209.3 psig
79°F 26.1°C 222.1 psig 212.7 psig
80°F 26.7°C 225.6 psig 216.1 psig
81°F 27.2°C 229.1 psig 219.5 psig
82°F 27.8°C 232.7 psig 222.9 psig
83°F 28.3°C 236.3 psig 226.4 psig
84°F 29.4°C 239.9 psig 229.9 psig
85°F 30.0°C 243.6 psig 233.5 psig
86°F 30.6°C 247.3 psig 237.1 psig
87°F 31.1°C 251.0 psig 240.8 psig
88°F 31.7°C 254.8 psig 244.4 psig
89°F 31.7°C 258.7 psig 248.2 psig
90°F 32.2°C 262.5 psig 251.9 psig
91°F 32.8°C 266.4 psig 255.7 psig
92°F 33.3°C 270.4 psig 259.6 psig
93°F 33.9°C 274.4 psig 263.5 psig
94°F 34.4°C 278.4 psig 267.4 psig
95°F 35.0°C 282.5 psig 271.4 psig
96°F 35.6°C 286.6 psig 275.4 psig
97°F 36.1°C 290.8 psig 279.5 psig
98°F 36.7°C 295.0 psig 283.6 psig
99°F 37.2°C 299.2 psig 287.8 psig
100°F 37.8°C 303.6 psig 291.6 psig
105°F 40.6°C 325.7 psig 313.6 psig
110°F 43.3°C 348.9 psig 336.4 psig
115°F 46.1°C 373.4 psig 360.5 psig
120°F 48.9°C 399.1 psig 385.8 psig
125°F 51.7°C 426.0 psig 412.4 psig
130°F 54.4°C 454.2 psig 440.5 psig
135°F 57.2°C 483.8 psig 470.0 psig
140°F 60.0°C 514.9 psig 501.0 psig
145°F 62.8°C 547.3 psig 533.7 psig
150°F 65.6°C 581.4 psig 568.2 psig

This chart contains all R454B operating pressures at different temperatures. If we presume that the outdoor temperature around the line set is stable, the refrigerant will also have that same temperature. We can use the PT chart to tell how what are the pressures of R454B refrigerant on hotter and colder days like this:

Example 1: What Are R454B Pressures On A 65-Degree Day?

From the PT chart, we can read that the pressure of liquid R454B on a 65-degree day is 177.3 psig.

Similarly, we can see that the vapor pressure of R454B on a 65-degree is 169.3 psig.

Example 2: What Are R454B Pressures On A 70-Degree Day?

From the PT chart, we can read that the pressure of liquid R454B on a 70-degree day is 192.5 psig.

Similarly, we can see that the vapor pressure of R454B on a 70-degree is 184.0 psig.

Example 3: What Are R454B Pressures On A 75-Degree Day?

From the PT chart, we can read that the pressure of liquid R454B on a 75-degree day is 208.6 psig.

Similarly, we can see that the vapor pressure of R454B on a 75-degree is 199.6 psig.

Example 4: What Are R454B Pressures On A 80-Degree Day?

From the PT chart, we can read that the pressure of liquid 4R454B on an 80-degree day is 225.6 psig.

Similarly, we can see that the vapor pressure of R454B on an 80-degree is 216.1 psig.

Example 5: What Are R454B Pressures On A 85-Degree Day?

From the PT chart, we can read that the pressure of liquid R454B on an 85-degree day is 243.6 psig.

Similarly, we can see that the vapor pressure of R454B on an 85-degree is 233.5 psig.

Example 6: What Are R454B Pressures On A 90-Degree Day?

From the PT chart, we can read that the pressure of liquid R454B on a 90-degree day is 262.5 psig.

Similarly, we can see that the vapor pressure of R454B on a 90-degree is 251.9 psig.

Example 7: What Are R454B Pressures On A 95-Degree Day?

From the PT chart, we can read that the pressure of liquid R454B on a 95-degree day is 282.5 psig.

Similarly, we can see that the vapor pressure of R454B on a 95-degree is 271.4 psig.

Example 8: What Are R454B Pressures On A 100-Degree Day?

From the PT chart, we can read that the pressure of liquid R454B on a 100-degree day is 303.6 psig.

Similarly, we can see that the vapor pressure of R454B on a 100-degree is 291.6 psig.

R454B Pressure Temperature Chart PDF

As promised, you can get the printable PDF version of the R454B PT chart here if you need it on-site. Here is the full chart you can freely download and take with you:

 

With this printable PT chart, we hope that you will be able to use an R454B chart without any problems.

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