R-22 (Legacy HCFC)
R-22 PT Chart
The full R-22 pressure-temperature reference table, from -40 to 120°F. R-22 is a pure single-component refrigerant, so the chart is one saturation column with zero glide. Cross-checked cell by cell against the Hudson Technologies R-22 chart and NIST REFPROP 9.0.
R-22 Pressure-Temperature Table
| Pressure (psig) | Sat. Temp (°F) |
|---|---|
| 1 | -40°F |
| 5 | -30°F |
| 10 | -20°F |
| 17 | -10°F |
| 24 | 0°F |
| 28 | 5°F |
| 33 | 10°F |
| 38 | 15°F |
| 43 | 20°F |
| 49 | 25°F |
| 55 | 30°F |
| 62 | 35°F |
| 69 | 40°F |
| 76 | 45°F |
| 84 | 50°F |
| 93 | 55°F |
| 102 | 60°F |
| 111 | 65°F |
| 121 | 70°F |
| 132 | 75°F |
| 144 | 80°F |
| 156 | 85°F |
| 168 | 90°F |
| 182 | 95°F |
| 196 | 100°F |
| 211 | 105°F |
| 226 | 110°F |
| 243 | 115°F |
| 260 | 120°F |
Read the low-side (suction) pressure and find its saturation temperature for superheat, and read the high-side (liquid) pressure and its saturation temperature for subcooling. The chart is in psig (gauge) and °F. To convert: kPa gauge = psig × 6.895; °C = (°F − 32) / 1.8.
R-22 PT Chart FAQs
What is the R-22 pressure at 40F and 100F?
On the R-22 PT chart, 40F saturation is about 69 psig and 100F is about 196 psig; 50F is about 84 psig and 120F is about 260 psig. R-22 is a single-component refrigerant with zero glide, so the same saturation temperature serves both superheat (suction) and subcooling (liquid); there is no bubble and dew split.
Is R-22 still available, and can I still buy it?
R-22 production and import ended January 1, 2020 under the EPA Clean Air Act, so only reclaimed R-22 is available and its price is high. Existing R-22 systems can still be serviced with reclaimed refrigerant, but for a failed compressor or a major leak the economics usually favor replacement with an A2L system on R-454B or R-32.
What refrigerant replaces R-22?
For new equipment, R-454B (ducted) and R-32 (mini splits) are the A2L successors. For servicing an existing R-22 system without replacing it, common retrofit blends include R-407C, R-421A, and R-422B, but a retrofit changes the oil and the target pressures, so always follow the blend manufacturer's retrofit guide rather than reading the system on the R-22 column afterward.
What units is this R-22 PT chart in, and how do I convert to kPa or Celsius?
The table is in psig (gauge pressure) and degrees Fahrenheit, the field-standard units in North America. To convert pressure to kPa (gauge), multiply psig by 6.895. To convert temperature to Celsius, use C = (F - 32) / 1.8.
Related R-22 Tools
R-22 Superheat & Subcooling Calculator
Enter your readings; the calculator interpolates this PT chart and returns the verdict.
R-407C PT Chart
The common R-22 retrofit blend, read on bubble and dew columns for its glide.
Line Set Calculator
Size the line set and get the reuse, flush, or replace verdict when converting an old system.
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