R407A pressure–temperature chart
R407A is a zeotropic blend. Its normal boiling point is -38.6 °C; the critical pressure is 45.1 bar. At the AHRI 540 air-conditioning rating point — 7.2 °C evaporating, 54.4 °C condensing — the saturation pressures are 6.35 and 23.54 bar, a pressure ratio of 3.71. As a zeotropic blend it evaporates and condenses over a range of temperatures at one pressure — a glide of 5.6 K at 0.0 °C — so the dew line (where the last liquid boils off) and the bubble line (where the first vapour forms) are both tabulated. Superheat is measured up from the dew temperature and subcooling down from the bubble temperature; a map's 8.3 K of subcooling is 8.3 K under the bubble line, not the dew line, and this solver reads it so.
Units: SI · US customary
Saturation table, -75 to 75 °C
| Dew °C | Bubble °C | Glide K | kPa abs | bar abs | psig | hfg kJ/kg | ρ liquid kg/m³ | ρ vapour kg/m³ |
|---|---|---|---|---|---|---|---|---|
| -75 | -82.0 | 7.0 | 11.1 | 0.111 | -13.1 | 252.0 | 1495 | 0.61 |
| -70 | -76.9 | 6.9 | 16.0 | 0.160 | -12.4 | 248.7 | 1480 | 0.86 |
| -65 | -71.9 | 6.9 | 22.4 | 0.224 | -11.4 | 245.4 | 1465 | 1.19 |
| -60 | -66.8 | 6.8 | 30.9 | 0.309 | -10.2 | 242.1 | 1450 | 1.60 |
| -55 | -61.7 | 6.7 | 41.8 | 0.418 | -8.6 | 238.7 | 1435 | 2.13 |
| -50 | -56.6 | 6.6 | 55.7 | 0.557 | -6.6 | 235.3 | 1419 | 2.78 |
| -45 | -51.5 | 6.5 | 73.1 | 0.731 | -4.1 | 231.8 | 1403 | 3.59 |
| -40 | -46.4 | 6.4 | 94.5 | 0.945 | -1.0 | 228.3 | 1387 | 4.57 |
| -35 | -41.4 | 6.4 | 120.6 | 1.206 | 2.8 | 224.7 | 1371 | 5.75 |
| -30 | -36.3 | 6.3 | 152.1 | 1.521 | 7.4 | 221.0 | 1355 | 7.17 |
| -25 | -31.2 | 6.2 | 189.8 | 1.898 | 12.8 | 217.2 | 1338 | 8.84 |
| -20 | -26.1 | 6.1 | 234.3 | 2.343 | 19.3 | 213.2 | 1321 | 10.81 |
| -15 | -21.0 | 6.0 | 286.6 | 2.866 | 26.9 | 209.2 | 1304 | 13.11 |
| -10 | -15.9 | 5.9 | 347.4 | 3.474 | 35.7 | 205.0 | 1286 | 15.78 |
| -5 | -10.8 | 5.8 | 417.7 | 4.177 | 45.9 | 200.7 | 1268 | 18.88 |
| 0 | -5.6 | 5.6 | 498.3 | 4.983 | 57.6 | 196.1 | 1249 | 22.44 |
| 5 | -0.5 | 5.5 | 590.4 | 5.904 | 70.9 | 191.4 | 1230 | 26.53 |
| 10 | 4.6 | 5.4 | 694.8 | 6.948 | 86.1 | 186.5 | 1210 | 31.23 |
| 15 | 9.7 | 5.3 | 812.8 | 8.128 | 103.2 | 181.4 | 1189 | 36.59 |
| 20 | 14.9 | 5.1 | 945.2 | 9.452 | 122.4 | 176.0 | 1168 | 42.73 |
| 25 | 20.0 | 5.0 | 1093.4 | 10.934 | 143.9 | 170.3 | 1145 | 49.75 |
| 30 | 25.2 | 4.8 | 1258.6 | 12.586 | 167.8 | 164.2 | 1122 | 57.78 |
| 35 | 30.3 | 4.7 | 1442.0 | 14.420 | 194.4 | 157.8 | 1097 | 67.00 |
| 40 | 35.5 | 4.5 | 1645.1 | 16.451 | 223.9 | 150.9 | 1071 | 77.62 |
| 45 | 40.7 | 4.3 | 1869.3 | 18.693 | 256.4 | 143.5 | 1043 | 89.92 |
| 50 | 45.9 | 4.1 | 2116.5 | 21.165 | 292.3 | 135.4 | 1013 | 104.29 |
| 55 | 51.2 | 3.8 | 2388.4 | 23.884 | 331.7 | 126.6 | 980 | 121.26 |
| 60 | 56.5 | 3.5 | 2687.3 | 26.873 | 375.1 | 116.7 | 943 | 141.66 |
| 65 | 61.8 | 3.2 | 3016.0 | 30.160 | 422.7 | 105.4 | 901 | 166.82 |
| 70 | 67.2 | 2.8 | 3378.4 | 33.784 | 475.3 | 92.0 | 851 | 199.24 |
| 75 | 72.7 | 2.3 | 3780.6 | 37.806 | 533.6 | 74.8 | 785 | 244.58 |
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 R407A.
R407A compressors in the catalog
673 compressor maps run on R407A, 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 — 474 maps: ZF (59), ZB (43), ZS (24), ZBD (22), YF (18), YS (13), ZX (12), YFH (10), ZFH (10), 3DF (8), 3DS (8), YB (7)
- Danfoss — 196 maps: MTZ (110), MLZ (86)
- Tecumseh — 3 maps
The largest at the air-conditioning point
- Copeland 6DJNR40ML-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6DJXR40ME-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6DRDR40ME-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6DRNR40ME-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6DSNR40ME-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6YJNR39ML-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6YRNR39ME-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6YSNR39ME-TSN (R407A Discus recip, 60 Hz, AC) — 135.1 kW at 7.2 / 54.4 °C
- Copeland 6DMNR37ME-TSN (R407A Discus recip, 60 Hz, AC) — 124.7 kW at 7.2 / 54.4 °C
- Copeland 6DMNR37ML-TSN (R407A Discus recip, 60 Hz, AC) — 124.7 kW at 7.2 / 54.4 °C
Open the R407A 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 R407A: the solver finds its evaporating and condensing temperatures from the coils and the compressor's map.