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R22 Pressure Chart: High And Low Side

R22 Pressure Chart: High And Low Side


If you’re working with R22 refrigerant, it’s important to know the pressures for both the high and low sides. Use this R22 pressure chart to ensure you’re working safely and efficiently.

How to Read a Pressure Chart

Assuming you have a basic understanding of how your R system works, reading a pressure chart is relatively simple. The first step is to identify the high and low side pressures. The high side will be the larger of the two numbers, while the low side will be the smaller. Next, find the ambient temperature. This will be either in degrees Celsius or degrees Fahrenheit and will be listed on the chart. Once you have these three numbers, locate them on the chart and trace a line from left to right until you reach the corresponding pressure reading.

For example, let’s say that your high side pressure is 145 PSI, your low side pressure is 35 PSI, and the ambient temperature is 70 degrees Fahrenheit. You would start by finding 145 PSI on the left-hand side of the chart and tracing a line straight across until you reach 70 degrees Fahrenheit on the bottom axis. Then, follow that lineup until you reach the 35 PSI mark on the right-hand side. This is your reading.

It’s important to note that most pressure charts are designed for use with R12 refrigerant. If you’re using a different type of refrigerant, you’ll need to find a chart specifically designed for that type.

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What is the difference between High and Low Side pressures?

High-side pressure is the pressure in the system after the compressor. It is typically 120-175 PSI and significantly higher than low-side pressure. Low-side pressure is the pressure in the system before the compressor. It is typically 30-60 PSI and significantly lower than high-side pressure.

How to use the R22 Pressure chart

The R22 pressure chart is a great tool to use when you’re troubleshooting your air conditioner. Here’s how to use it:

  1. Find the ambient temperature on the left side of the chart.
  2. Find the corresponding pressure on the right side of the chart.
  3. Use a pressure gauge to measure the low-side pressure of your AC unit.
  4. Compare the low-side pressure to the pressure on the chart. If it’s lower, then your unit is low on refrigerant and needs to be recharged.

R22 pt chart PDF

R22 is a refrigerant gas that was commonly used in air conditioners and other cooling units. However, due to its harmful effects on the environment, it has been phased out and is no longer being produced. As a result, the prices for R22 have been steadily rising, making it more and more difficult for homeowners to afford.

If you’re looking for an R22 pressure chart, you’ll likely have better luck finding one in PDF format. This type of file is typically easier to view and print than other types of files. Here are a few places where you can find an R22 pressure chart PDF:

R22 Pressure Chart: High And Low Side

  • The Department of Energy’s website:
  • The Air Conditioning Contractors of America’s website:
  • Refrigerant HQ’s website:
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R22 suction and discharge pressure chart

This pressure chart outlines the suction and discharge pressures for an R22 refrigerant. The column on the left lists the corresponding saturated temperature, while the right column lists the actual pressures.


  • -40°F 37 psig
  • -30°F 41 psig
  • -20°F 45 psig
  • -10°F 49 psig
  • 0°F 53 psig


If you’re looking for an R22 pressure chart, you’ve come to the right place. In this article, we’ll provide you with a high and low side R22 pressure chart so that you can easily find the information you need. We’ll also give you some tips on how to use the chart and what to do if you’re having trouble finding the information you need.

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