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).

  

• 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

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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