R407c PT Chart: 407c -49°F To 150°F Pressures (+PDF)

When dealing with R407c refrigerants, you will have to consult the R407c PT chart. This is a chart that tells you what pressure R407C should have at -49°F to 150°F temperatures. Using an R407c pressure temperature chart you can also check what temperature a saturated R407c liquid and vapor should have at -10.4 psig to 437.5 psig pressure.

R407c is an HFC refrigerant that will replace the R22 refrigerant, as per Montreal Protocol. It is a mixture of R32 (23%), R125 (25%), and R134a (52%) that has a boiling point of -46.84°F. The same as R22, due to useful pressure-temperature properties, R407c is used in air conditioning systems, cars, and refrigeration units.

Below, you will find an online R407c PT chart. On top of that, we also include a 407c pressure temperature chart in pdf form at the end. You can use this chart on the go for various HVAC tasks when dealing with R407c vapor and liquid pressure, including:

  • Figuring out what are pressure R407c pressures on 65-degree, 70-degree, 75-degree, 80-degree, 85-degree, 90-degree days, and so on. Further on, we show examples of what pressures should 407c refrigerant have on 65-100 degree days.
  • Identify if you have an R407c refrigerant in the system or in a reusable bottle (R407c bottles have a burnt orange color).
    measuring pressure for 407c on 90 degree day
    Measure pressure in a grey reusable recovery bottle (at a certain temp) and you can use a 407c PT chart to determine if you have a 407c refrigerant in there.
  • Distinguishing between R22 and R407c (R407c is a retrofit or alternative to R22). The R407c must have POE oil in the system. The difference between 407c pressures vs R22 pressures can be very small; make sure to steady the temperature and use a precise thermometer for 407c vs R22 pressures measurement.
  • Determine 407c superheat vapor temperature difference and subcooling liquid temperature difference. On the 407c PT chart, you have 407c liquid pressure for subcooling calculations and 407c vapor pressure for superheat calculations (including total superheat)

Note: When measuring R407c pressure at the service valve found between evaporator and compressor, the system must be off and equalized (407c in the saturated state across the system). The equalized system will have the same R407c pressure on the low and high sides. If the system is not equalized, the saturated state is only found at the evaporator (measured outdoor vapor service port) and condenser.

With all this in mind, let’s have a look at the 407c pressure temperature chart and check out the 65-100 degree day pressures of 407c:

407C Pressure Temperature Chart

Temperature (°F): Temperature (°C): 407c Liquid Pressure (psig): 407c Vapor Pressure (psig):
-49°F -45.0°C -1.9 psig -10.4 psig
-48°F -44.4°C -1.2 psig -9.8 psig
-47°F -43.9°C -0.4 psig -9.2 psig
-46°F -43.3°C 0.2 psig -8.6 psig
-45°F -42.8°C 0.6 psig -8.0 psig
-44°F -42.2°C 1.0 psig -7.3 psig
-43°F -41.7°C 1.4 psig -6.7 psig
-42°F -41.1°C 1.9 psig -6.0 psig
-41°F -40.6°C 2.3 psig -5.3 psig
-40°F -40.0°C 2.7 psig -4.6 psig
-39°F -39.4°C 3.2 psig -3.9 psig
-38°F -38.9°C 3.7 psig -3.2 psig
-37°F -38.3°C 4.1 psig -2.4 psig
-36°F -37.8°C 4.6psig -1.6 psig
-35°F -37.2°C 5.1 psig -0.9 psig
-34°F -36.7°C 5.6 psig 0.1 psig
-33°F -36.1°C 6.1 psig 0.4 psig
-32°F -35.6°C 6.6psig 0.8 psig
-31°F -35.0°C 7.2 psig 1.2 psig
-30°F -34.4°C 7.7 psig 1.6 psig
-29°F -33.9°C 8.3 psig 2.1 psig
-28°F -33.3°C 8.8 psig 2.5 psig
-27°F -32.8°C 9.4 psig 3.0 psig
-26°F -32.2°C 10.0 psig 3.5 psig
-25°F -31.7°C 10.6 psig 3.9 psig
-24°F -31.1°C 11.2 psig 4.4 psig
-23°F -30.6°C 11.8 psig 4.9 psig
-22°F -30.0°C 12.4 psig 5.4 psig
-21°F -29.4°C 13.1 psig 5.9 psig
-20°F -28.9°C 13.7 psig 6.5 psig
-19°F -28.3°C 14.4 psig 7.0 psig
-18°F -27.8°C 15.1 psig 7.6 psig
-17°F -27.2°C 15.8 psig 8.1 psig
-16°F -26.7°C 16.5 psig 8.7 psig
-15°F -26.1°C 17.2 psig 9.3 psig
-14°F -25.6°C 17.9 psig 9.9 psig
-13°F -25.0°C 18.7 psig 10.5 psig
-12°F -24.4°C 19.4 psig 11.1 psig
-11°F -23.9°C 20.2 psig 11.7 psig
-10°F -23.3°C 20.9 psig 12.3 psig
-9°F -22.8°C 21.7 psig 13.0 psig
-8°F -22.2°C 22.5 psig 13.7 psig
-7°F -21.7°C 23.4 psig 14.3 psig
-6°F -21.1°C 24.2 psig 15.0 psig
-5°F -20.6°C 25.0 psig 15.7 psig
-4°F -20.0°C 25.9 psig 16.4 psig
-3°F -19.4°C 26.8 psig 17.2 psig
-2°F -18.9°C 27.7 psig 17.9 psig
-1°F -18.3°C 28.6 psig 18.7 psig
0°F -17.8°C 29.5 psig 19.4 psig
1°F -17.2°C 30.4 psig 20.2 psig
2°F -16.7°C 31.4 psig 21.0 psig
3°F -16.1°C 32.3 psig 21.8 psig
4°F -15.6°C 33.3 psig 22.6 psig
5°F -15.0°C 34.3 psig 23.5 psig
6°F -14.4°C 35.3 psig 24.3 psig
7°F -13.9°C 36.4 psig 25.2 psig
8°F -13.3°C 37.4 psig 26.1 psig
9°F -12.8°C 38.5 psig 27.0 psig
10°F -12.2°C 39.5 psig 27.9 psig
11°F -11.7°C 40.6 psig 28.8 psig
12°F -11.1°C 41.7 psig 29.8 psig
13°F -10.6°C 42.9 psig 30.7 psig
14°F -10.0°C 44.0 psig 31.7 psig
15°F -9.4°C 45.2 psig 32.7 psig
16°F -8.9°C 46.3 psig 33.7 psig
17°F -8.3°C 47.5 psig 34.7 psig
18°F -7.8°C 48.7 psig 35.7 psig
19°F -7.2°C 50.0 psig 36.8 psig
20°F -6.7°C 51.2 psig 37.9 psig
21°F -6.1°C 52.5 psig 39.0 psig
22°F -5.6°C 53.8 psig 40.1 psig
23°F -5.0°C 55.1 psig 41.2 psig
24°F -4.4°C 56.4 psig 42.3 psig
25°F -3.9°C 57.7 psig 43.5 psig
26°F -3.3°C 59.1 psig 44.7 psig
27°F -2.8°C 60.5 psig 45.9 psig
28°F -2.2°C 61.9 psig 47.1 psig
29°F -1.7°C 63.3 psig 48.3 psig
30°F -1.1°C 64.7 psig 49.6 psig
31°F -0.6°C 66.2 psig 50.8 psig
32°F 0°C 67.7 psig 52.1 psig
33°F 0.6°C 69.2 psig 52.5 psig
34°F 1.1°C 70.7 psig 54.8 psig
35°F 1.7°C 72.2 psig 56.1 psig
36°F 2.2°C 73.8 psig 57.5 psig
37°F 2.8°C 75.4 psig 58.9 psig
38°F 3.3°C 77.0 psig 60.3 psig
39°F 3.9°C 78.6 psig 61.7 psig
40°F 4.4°C 80.2 psig 63.2 psig
41°F 5.0°C 81.9 psig 64.6 psig
42°F 5.6°C 83.6 psig 66.1 psig
43°F 6.1°C 85.3 psig 67.6 psig
44°F 6.7°C 87.0 psig 69.2 psig
45°F 7.2°C 88.8 psig 70.7 psig
46°F 7.8°C 90.6 psig 72.3 psig
47°F 8.3°C 92.4 psig 73.9 psig
48°F 8.9°C 94.2 psig 75.5 psig
49°F 9.4°C 96.0 psig 77.2 psig
50°F 10.0°C 97.9 psig 78.8 psig
51°F 10.6°C 99.8 psig 80.5 psig
52°F 11.1°C 101.7 psig 82.2 psig
53°F 11.7°C 103.7 psig 84.0 psig
54°F 12.2°C 105.6 psig 85.7 psig
55°F 12.8°C 107.6 psig 87.5 psig
56°F 13.3°C 109.6 psig 89.3 psig
57°F 13.9°C 111.7 psig 91.2 psig
58°F 14.4°C 113.7 psig 93.0 psig
59°F 15.0°C 115.8 psig 94.9 psig
60°F 15.6°C 118.0 psig 96.8 psig
61°F 16.1°C 120.1 psig 98.7 psig
62°F 16.7°C 122.3 psig 100.7 psig
63°F 17.2°C 124.4 psig 102.7 psig
64°F 17.8°C 126.7 psig 104.7 psig
65°F 18.3°C 128.9 psig 106.7 psig
66°F 18.9°C 131.2 psig 108.8 psig
67°F 19.4°C 133.5 psig 110.9 psig
68°F 20.0°C 135.8 psig 113.0 psig
69°F 20.6°C 138.2 psig 115.1 psig
70°F 21.1°C 140.5 psig 117.3 psig
71°F 21.7°C 142.9 psig 119.5 psig
72°F 22.2°C 145.4 psig 121.7 psig
73°F 22.8°C 147.8 psig 124.0 psig
74°F 23.3°C 150.3 psig 126.2 psig
75°F 23.9°C 152.8 psig 128.6 psig
76°F 24.4°C 155.4 psig 130.9 psig
77°F 25.0°C 158.0 psig 133.3 psig
78°F 25.6°C 160.6 psig 135.6 psig
79°F 26.1°C 163.2 psig 138.1 psig
80°F 26.7°C 165.8 psig 140.5 psig
81°F 27.2°C 168.5 psig 143.0 psig
82°F 27.8°C 171.3 psig 145.5 psig
83°F 28.3°C 174.0 psig 148.1 psig
84°F 29.4°C 176.8 psig 150.6 psig
85°F 30.0°C 179.6 psig 153.2 psig
86°F 30.6°C 182.4 psig 155.9 psig
87°F 31.1°C 185.3 psig 158.5 psig
88°F 31.7°C 188.2 psig 161.2 psig
89°F 31.7°C 191.1 psig 163.9 psig
90°F 32.2°C 194.1 psig 166.7 psig
91°F 32.8°C 197.1 psig 169.5 psig
92°F 33.3°C 200.1 psig 172.3 psig
93°F 33.9°C 203.2 psig 175.2 psig
94°F 34.4°C 206.3 psig 178.1 psig
95°F 35.0°C 209.4 psig 181.0 psig
96°F 35.6°C 212.5 psig 184.0 psig
97°F 36.1°C 215.7 psig 186.9 psig
98°F 36.7°C 219.0 psig 190.0 psig
99°F 37.2°C 222.2 psig 193 psig
100°F 37.8°C 225.5 psig 196.1 psig
105°F 40.6°C 242.4 psig 212.1 psig
110°F 43.3°C 260.3 psig 229.0 psig
115°F 46.1°C 279.0 psig 246.9 psig
120°F 48.9°C 298.6 psig 265.8 psig
125°F 51.7°C 319.2 psig 285.7 psig
130°F 54.4°C 240.7 psig 306.7 psig
135°F 57.2°C 363.3 psig 328.8 psig
140°F 60.0°C 387.0 psig 352.1 psig
145°F 62.8°C 411.7 psig 376.6 psig
150°F 65.6°C 437.5 psig 402.5 psig

As you can see, this chart tells you exactly what pressure should 407c refrigerant in liquid and vapor states have at different temperatures.

Based on this PT chart, we can tell what are the pressures of R407c on hot and cold days (given that the refrigerant has the same temperature as the outdoor temperature). Let’s look at several examples:

Example 1: What Are 407c Pressures On A 65-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on a 65-degree day is 128.9 psig.

Similarly, we can see that the vapor pressure of 407c on a 65-degree is 106.7 psig.

Example 2: What Are 407c Pressures On A 70-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on a 70-degree day is 140.5 psig.

Similarly, we can see that the vapor pressure of 407c on a 70-degree is 117.3 psig.

Example 3: What Are 407c Pressures On A 75-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on a 75-degree day is 152.8 psig.

Similarly, we can see that the vapor pressure of 407c on a 75-degree is 128.6 psig.

Example 4: What Are 407c Pressures On A 80-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on an 80-degree day is 165.8 psig.

Similarly, we can see that the vapor pressure of 407c on an 80-degree is 140.5 psig.

Example 5: What Are 407c Pressures On A 85-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on an 85-degree day is 179.6 psig.

Similarly, we can see that the vapor pressure of 407c on an 85-degree is 153.2 psig.

Example 6: What Are 407c Pressures On A 90-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on a 90-degree day is 194.1 psig.

Similarly, we can see that the vapor pressure of 407c on a 90-degree is 166.7 psig.

Example 7: What Are 407c Pressures On A 95-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on a 95-degree day is 209.4 psig.

Similarly, we can see that the vapor pressure of 407c on a 95-degree is 181.0 psig.

Example 8: What Are 407c Pressures On A 100-Degree Day?

From the PT chart, we can read that the pressure of liquid 407c on a 100-degree day is 225.5 psig.

Similarly, we can see that the vapor pressure of 407c on a 100-degree is 196.1 psig.

407c Pressure Temperature Chart PDF

As promised, you can get the printable PDF version of the 407c 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 chart, we hope that you will be able to use a 407c PT chart without any problems.

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