TXV Charging Targets (Quick Reference)
| Refrigerant | Class | TXV superheat | TXV subcooling |
|---|---|---|---|
| R-410A | HFC | 8–15°F | 8–14°F |
| R-454B | A2L | 8–15°F | 8–14°F |
| R-32 | A2L | 8–15°F | 8–14°F |
| R-22 | HCFC | 10–18°F | 8–14°F |
| R-134a | HFC | 8–14°F | 8–14°F |
| R-407C | HFC | 8–15°F | 8–14°F |
Pressure-Temperature Charts
R-410A PT Chart
| R-410A | ||
|---|---|---|
| Pressure (psig) | Sat. Temp (°F) | Publisher spread (°F) |
| 26.9 | -20°F | 0.74 |
| 31.7 | -15°F | 0.70 |
| 36.8 | -10°F | 0.45 |
| 42.5 | -5°F | 0.42 |
| 48.6 | 0°F | 0.31 |
| 55.2 | 5°F | 0.21 |
| 62.3 | 10°F | 0.07 |
| 70 | 15°F | 0 |
| 78.3 | 20°F | 0.06 |
| 87.3 | 25°F | 0.03 |
| 96.8 | 30°F | 0.10 |
| 107 | 35°F | 0.16 |
| 118 | 40°F | 0.18 |
| 130 | 45°F | 0.06 |
| 142 | 50°F | 0.24 |
| 155 | 55°F | 0.35 |
| 170 | 60°F | 0.04 |
| 185 | 65°F | 0.06 |
| 201 | 70°F | 0.03 |
| 217 | 75°F | 0.28 |
| 235 | 80°F | 0.22 |
| 254 | 85°F | 0.15 |
| 274 | 90°F | 0.12 |
| 295 | 95°F | 0.12 |
| 317 | 100°F | 0.13 |
| 340 | 105°F | 0.19 |
| 365 | 110°F | 0.08 |
| 391 | 115°F | 0.04 |
| 418 | 120°F | 0.06 |
| 446 | 125°F | 0.14 |
| 476 | 130°F | 0.13 |
About the spread column. It is the widest gap in saturation temperature between the published tables we hold, at that pressure, on the saturation column. Across this chart the widest is 0.74°F, at 26.9 psig. Our table and 1 other published table are compared here: 1 is a separate publisher. A narrow spread means the charts agree, which is not the same as the charts being right: they are all computed from equations of state fitted to lab data, and no field measurement settles it.
- Checked against Arkema Forane R-410A, all 31 shipped cells within 1.0 psig on its vapor column, the column Hudson tracks; widest gap 1.0 psig at 55F [same printing as Weitron]
- Checked against CoolProp-derived tables, anchor points agree [same model]
- Checked against Weitron, reprinted as Daikin/Goodman PM-A2LPTC-USA_04-24, within 0.75 F across the shipped range [separate publisher]
R-410A is carried as a single-column near-azeotrope. Forane prints a real 0.0 to 1.2 psig liquid and vapor split, which biases subcooling by about 0.2 F across 90 to 130 F condensing. That sits inside the 1.0 F manufacturer tolerance and is left unmodelled and disclosed here rather than silently corrected.
A separate publisher can catch a transcription, edition or rounding error. A cross-check marked same model resolves to the same equation of state as the base table, so it is a consistency check rather than independent confirmation. One marked same printing prints numbers identical to another table listed here, so the two are one witness and we do not count them twice. Sources last re-verified 2026-08-25.
R-454B PT Chart
| R-454B | |||
|---|---|---|---|
| Pressure (psig) | Bubble °F (subcooling) | Dew °F (superheat) | Publisher spread (°F) |
| 24.3 | -20°F | -18.3°F | 0.67 |
| 33.9 | -10°F | -7.9°F | 0.67 |
| 45.3 | 0°F | 1.9°F | 0.64 |
| 58.5 | 10°F | 12.2°F | 0.69 |
| 73.9 | 20°F | 22°F | 0.67 |
| 91.7 | 30°F | 32.3°F | 0.63 |
| 112 | 40°F | 42.1°F | 0.60 |
| 135 | 50°F | 52.4°F | 0.65 |
| 161.1 | 60°F | 62.1°F | 0.65 |
| 190.5 | 70°F | 72.4°F | 0.65 |
| 223.4 | 80°F | 82.2°F | 0.64 |
| 260 | 90°F | 92.4°F | 0.65 |
| 300.8 | 100°F | 102.1°F | 0.65 |
| 345.9 | 110°F | 112.3°F | 0.65 |
| 395.7 | 120°F | 122.1°F | 0.66 |
| 450.5 | 130°F | 132.2°F | 0.66 |
About the spread column. It is the widest gap in saturation temperature between the published tables we hold, at that pressure, on the bubble column. Across this chart the widest is 0.69°F, at 58.5 psig. Our table and 3 other published tables are compared here: 1 is a separate publisher, and 2 resolve to the same equation of state as our base, so those are consistency checks rather than independent confirmation. A narrow spread means the charts agree, which is not the same as the charts being right: they are all computed from equations of state fitted to lab data, and no field measurement settles it.
- Checked against Arkema Forane 454B, within 0.1 psig [same model]
- Checked against Chemours Opteon XL41, within 0.05 psig [same model]
- Checked against Honeywell Solstice 454B, within 2 psig [separate publisher]
- Checked against Weitron, reprinted as Daikin/Goodman PM-A2LPTC-USA_04-24, bubble line about 0.64 F away [separate publisher]
Arkema and Chemours make this blend, and both state their tables were generated from NIST REFPROP, the same equation-of-state lineage our own base resolves to. Their agreement is close and it is not independent confirmation. Weitron is the one table that disagrees: its bubble line sits about 0.64 F from ours across the whole range, a constant offset rather than noise, and no further chart can settle which is right. The calculator says so on any reading close enough to a band edge for that difference to change the call.
A separate publisher can catch a transcription, edition or rounding error. A cross-check marked same model resolves to the same equation of state as the base table, so it is a consistency check rather than independent confirmation. One marked same printing prints numbers identical to another table listed here, so the two are one witness and we do not count them twice. Sources last re-verified 2026-08-25.
R-22 PT Chart
| R-22 | ||
|---|---|---|
| Pressure (psig) | Sat. Temp (°F) | Publisher spread (°F) |
| 1 | -40°F | 1.00 |
| 3 | -35°F | 0.87 |
| 5 | -30°F | 0.20 |
| 7 | -25°F | 0.80 |
| 10 | -20°F | 0.36 |
| 13 | -15°F | 0.33 |
| 17 | -10°F | 0.69 |
| 20 | -5°F | 0.14 |
| 24 | 0°F | 0 |
| 28 | 5°F | 0.35 |
| 33 | 10°F | 0.20 |
| 38 | 15°F | 0.19 |
| 43 | 20°F | 0.09 |
| 49 | 25°F | 0.16 |
| 55 | 30°F | 0 |
| 62 | 35°F | 0.35 |
| 69 | 40°F | 0.27 |
| 76 | 45°F | 0.07 |
| 84 | 50°F | 0.06 |
| 93 | 55°F | 0.22 |
| 102 | 60°F | 0.21 |
| 111 | 65°F | 0.15 |
| 121 | 70°F | 0.20 |
| 132 | 75°F | 0.09 |
| 144 | 80°F | 0.17 |
| 156 | 85°F | 0.12 |
| 168 | 90°F | 0.16 |
| 182 | 95°F | 0.07 |
| 196 | 100°F | 0.03 |
| 211 | 105°F | 0.06 |
| 226 | 110°F | 0.13 |
| 243 | 115°F | 0.06 |
| 260 | 120°F | 0 |
About the spread column. It is the widest gap in saturation temperature between the published tables we hold, at that pressure, on the saturation column. Across this chart the widest is 1.00°F, at 1 psig. Our table and 1 other published table are compared here: 1 is a separate publisher. A narrow spread means the charts agree, which is not the same as the charts being right: they are all computed from equations of state fitted to lab data, and no field measurement settles it.
- Checked against NIST REFPROP 9.0, as printed by iGas and Arkema, agrees to the whole psig at all 33 shipped points, raw spread at most 0.4 psig [separate publisher]
A separate publisher can catch a transcription, edition or rounding error. A cross-check marked same model resolves to the same equation of state as the base table, so it is a consistency check rather than independent confirmation. One marked same printing prints numbers identical to another table listed here, so the two are one witness and we do not count them twice. Sources last re-verified 2026-08-25.
Need another refrigerant? See the dedicated R-32, R-404A, and R-407C PT charts. For every refrigerant plus glide handling, use the full calculator.
Pressure-temperature values are cross-checked against manufacturer and published reference charts on the per-refrigerant pages. Target ranges are field rule-of-thumb envelopes, so always confirm against the equipment nameplate or manufacturer charging chart. Every value is derived from the same locked data the Intry calculator uses. Free reference from intrysys.com, updated August 25, 2026.