R22 pressure–temperature chart
R22 is a pure fluid. Its normal boiling point is -40.8 °C; the critical pressure is 49.9 bar. At the AHRI 540 air-conditioning rating point — 7.2 °C evaporating, 54.4 °C condensing — the saturation pressures are 6.25 and 21.46 bar, a pressure ratio of 3.43.
Units: SI · US customary
Saturation table, -75 to 95 °C
| °C | kPa abs | bar abs | psig | hfg kJ/kg | ρ liquid kg/m³ | ρ vapour kg/m³ |
|---|---|---|---|---|---|---|
| -75 | 14.7 | 0.147 | -12.6 | 254.0 | 1505 | 0.78 |
| -70 | 20.5 | 0.205 | -11.7 | 251.1 | 1491 | 1.06 |
| -65 | 27.9 | 0.279 | -10.6 | 248.2 | 1477 | 1.42 |
| -60 | 37.5 | 0.375 | -9.3 | 245.3 | 1464 | 1.86 |
| -55 | 49.6 | 0.496 | -7.5 | 242.4 | 1450 | 2.41 |
| -50 | 64.5 | 0.645 | -5.3 | 239.4 | 1436 | 3.09 |
| -45 | 82.9 | 0.829 | -2.7 | 236.3 | 1421 | 3.90 |
| -40 | 105.2 | 1.052 | 0.6 | 233.2 | 1407 | 4.87 |
| -35 | 132.0 | 1.320 | 4.5 | 230.1 | 1392 | 6.02 |
| -30 | 163.9 | 1.639 | 9.1 | 226.8 | 1377 | 7.38 |
| -25 | 201.4 | 2.014 | 14.5 | 223.5 | 1362 | 8.96 |
| -20 | 245.3 | 2.453 | 20.9 | 220.0 | 1347 | 10.79 |
| -15 | 296.2 | 2.962 | 28.3 | 216.5 | 1331 | 12.90 |
| -10 | 354.8 | 3.548 | 36.8 | 212.8 | 1315 | 15.32 |
| -5 | 421.8 | 4.218 | 46.5 | 209.0 | 1298 | 18.09 |
| 0 | 498.0 | 4.980 | 57.5 | 205.0 | 1282 | 21.23 |
| 5 | 584.1 | 5.841 | 70.0 | 201.0 | 1264 | 24.79 |
| 10 | 680.9 | 6.809 | 84.1 | 196.7 | 1247 | 28.82 |
| 15 | 789.3 | 7.893 | 99.8 | 192.2 | 1229 | 33.36 |
| 20 | 910.0 | 9.100 | 117.3 | 187.6 | 1210 | 38.48 |
| 25 | 1043.9 | 10.439 | 136.7 | 182.7 | 1191 | 44.23 |
| 30 | 1191.9 | 11.919 | 158.2 | 177.6 | 1171 | 50.70 |
| 35 | 1354.8 | 13.548 | 181.8 | 172.3 | 1150 | 57.99 |
| 40 | 1533.6 | 15.336 | 207.7 | 166.6 | 1129 | 66.19 |
| 45 | 1729.2 | 17.292 | 236.1 | 160.6 | 1106 | 75.46 |
| 50 | 1942.7 | 19.427 | 267.1 | 154.2 | 1082 | 85.95 |
| 55 | 2175.1 | 21.751 | 300.8 | 147.3 | 1057 | 97.90 |
| 60 | 2427.5 | 24.275 | 337.4 | 139.9 | 1030 | 111.59 |
| 65 | 2701.2 | 27.012 | 377.1 | 131.9 | 1001 | 127.43 |
| 70 | 2997.4 | 29.974 | 420.0 | 123.0 | 970 | 145.99 |
| 75 | 3317.7 | 33.177 | 466.5 | 113.0 | 934 | 168.16 |
| 80 | 3663.8 | 36.638 | 516.7 | 101.6 | 894 | 195.40 |
| 85 | 4037.8 | 40.378 | 570.9 | 87.8 | 845 | 230.56 |
| 90 | 4442.3 | 44.423 | 629.6 | 69.8 | 780 | 280.63 |
| 95 | 4882.4 | 48.824 | 693.4 | 37.7 | 663 | 382.04 |
Pressures are absolute in kPa and bar, gauge in psig (at 101.325 kPa atmospheric); hfg is the latent heat of vaporisation at the dew pressure; densities are saturated liquid and saturated vapour. Computed with CoolProp 8.0.0, the open-source property library the solver runs on, sampled every 0.5 K and printed every 5 K — the same tables the builder reads when it solves a circuit on R22.
R22 compressors in the catalog
1,292 compressor maps run on R22, each a page with its AHRI 540 / EN 12900 map across the published envelope, and each selectable in the builder. Read any of them at your own evaporating and condensing temperatures →
- Copeland — 277 maps: CR (52), ZR (47), ZB (28), ZF (25), ZW (22), ZS (19), YS (16), ZBD (12), ZSH (8), ZWD (6), 6DUNR (4), 6DUXR (4)
- Danfoss — 557 maps: MLZ (182), HRM (106), MT (106), SM (69), MLM (37), HLM (29), HCM (15), SY (13)
- Tecumseh — 97 maps: AGB (37), AWS (15), AJ (12), AJK (11), RGA (8), AE (6), AWR (4)
- Invotech — 350 maps: YH (99), YM (88), YF (76), YW (43), YSF (26), YSM (8), YSH (6), YSW (4)
- Embraco — 11 maps: NJ (11)
The largest at the air-conditioning point
- Copeland 6DJNR40M0-AWX (R22 Discus recip, 60 Hz, MT) — 127.9 kW at 7.2 / 54.4 °C
- Danfoss SY380-4 (R22 scroll, 60 Hz, A/C) — 115.3 kW at 7.2 / 54.4 °C
- Danfoss SY380-9 (R22 scroll, 60 Hz, A/C) — 115.3 kW at 7.2 / 54.4 °C
- Copeland ZR380KCE-TED (R22 scroll, 60 Hz, AC) — 111.2 kW at 7.2 / 54.4 °C
- Copeland ZR380KC-TED (R22 scroll, 60 Hz, AC) — 111.2 kW at 7.2 / 54.4 °C
- Copeland 6DHNR35M0-AWX (R22 Discus recip, 60 Hz, MT) — 110.1 kW at 7.2 / 54.4 °C
- Danfoss SY300-3 (R22 scroll, 60 Hz, A/C) — 94.5 kW at 7.2 / 54.4 °C
- Danfoss SY300-4 (R22 scroll, 60 Hz, A/C) — 94.5 kW at 7.2 / 54.4 °C
- Danfoss SY300-9 (R22 scroll, 60 Hz, A/C) — 94.5 kW at 7.2 / 54.4 °C
- Copeland ZR380KC-TWD (R22 scroll, 50 Hz, AC) — 92.2 kW at 7.2 / 54.4 °C
Open the R22 chart in the app — the pressure–temperature line drawn, readable at any point, with a compressor's envelope over it — or open the builder and draw a circuit on R22: the solver finds its evaporating and condensing temperatures from the coils and the compressor's map.