R1234ze(E) pressure temperature chart (PT)
An R1234ze(E) pressure temperature chart (PT chart) is a saturation lookup for R1234ze(E): it relates temperature and saturation pressure when liquid and vapor coexist in equilibrium. This is useful for thermodynamic interpretation, but it is not a universal “normal running pressure” diagnostic chart.
Pressure basis: absolute vs gauge
The table below is absolute pressure (kPa(a), bar(a), psi(a)). Many gauges display gauge pressure (relative to ambient). Converting requires local atmospheric pressure:
Learn more: Gauge vs absolute pressure (psig vs psia).
Safety note
Refrigerants have safety classifications (toxicity/flammability) and their use is governed by codes and local regulations. This page is educational and provides property reference data only — always follow OEM procedures and applicable safety requirements.
R1234ze(E) saturation pressure vs temperature (reference table)
Generated using CoolProp (the same property engine used by FluidTool) at Q=0 saturation. Values are rounded for readability.
| T (°C) | T (°F) | Psat (kPa(a)) | Psat (bar(a)) | Psat (psi(a)) |
|---|---|---|---|---|
| -20 | -4 | 96.9 | 0.969 | 14.1 |
| -10 | 14 | 147.4 | 1.474 | 21.4 |
| 0 | 32 | 216.6 | 2.166 | 31.4 |
| 10 | 50 | 308.4 | 3.084 | 44.7 |
| 20 | 68 | 427.3 | 4.273 | 62.0 |
| 30 | 86 | 578.3 | 5.783 | 83.9 |
| 40 | 104 | 766.5 | 7.665 | 111.2 |
| 50 | 122 | 997.2 | 9.972 | 144.6 |
| 60 | 140 | 1276.6 | 12.766 | 185.2 |
| 70 | 158 | 1611.0 | 16.110 | 233.7 |
How to verify any row in FluidTool
- Open FluidTool with R1234ze(E) selected: /?fluid=R1234ze(E)
- Choose a Two-phase input pair (Temperature & Quality / T + Q).
- Set Q=0 and enter the temperature from the table to read Psat.
Related
- R1234ze(E) data sheet: basic identifiers and thermodynamic context.
- Refrigerant PT chart: what Tsat(P)/Psat(T) means and common pitfalls.
- Superheat & Subcooling: interpret measured line temperature vs saturation temperature.