REFRIGERANT • PT DATA v1
R-438A
PT data, curve stats, and quick routes into the field calculators. Data shown here is derived from the versioned PT asset set under /assets/pt/v1.
At a glance
SAFETY • A1
CURVE • bubble
POINTS • 351
GWP
2264
ODP
Curves available
Dew + Bubble
Pressure range (psig)
-14.6 to 577.21
Temperature range (°F)
-170 to 180
Note: PT points are stored in psig and °F. For blends, bubble and dew represent different saturation states. Always follow OEM charging procedures.
Quick actions
These routes are designed to be technician-friendly: minimal taps, prefilled context, and predictable URLs for bookmarks and sharing.
Pressure → Saturation temperature (quick)
Linear interpolation between nearest points. Out-of-range values show “—”.
| Pressure (psig) | Sat Temp (°F) | Source |
|---|---|---|
| 0 | -44.2 | linear |
| 25 | -2.2 | linear |
| 50 | 22.3 | linear |
| 75 | 40.3 | linear |
| 100 | 54.9 | linear |
| 150 | 78.1 | linear |
| 200 | 96.5 | linear |
| 250 | 112 | linear |
| 300 | 125.4 | linear |
| 350 | 137.4 | linear |
| 400 | 148.1 | linear |
| 450 | 158 | linear |
Temperature → Saturation pressure (quick)
Useful for “I have a target saturation temp—what pressure should I see?” checks.
| Temp (°F) | Sat Pressure (psig) | Source |
|---|---|---|
| -40 | 1.7 | exact |
| -20 | 12 | exact |
| 0 | 26.8 | exact |
| 20 | 47.3 | exact |
| 40 | 74.5 | exact |
| 60 | 109.8 | exact |
| 80 | 154.7 | exact |
| 100 | 210.6 | exact |
| 120 | 279.1 | exact |
| 140 | 361.9 | exact |
Data source & notes
PT asset ID
r438aOriginal name
R-438A
CAS
—
Units
psig / F (atm: 14.6959 psi)
Default curve
dew
PT index version
v1(from /assets/pt/v1/index.json)Safety note: PT lookups are a foundational building block for charging and diagnostics, but they do not replace OEM procedures or full system context.