R-134a Refrigerant Mainframe: Properties, PT Charts, and Charging Pressures
Complete technical reference for R-134a refrigerant, featuring saturation pressure charts, boiling properties, and field charging guidelines.
The Core Benchmark of Medium-Temperature Cooling
R-134a (Tetrafluoroethane) remains a key refrigerant for domestic refrigerators, automotive AC systems, and heavy centrifugal commercial chillers due to its stable thermodynamic profile and favorable operating pressures.
In this technical reference guide, we lay out the R-134a Saturation and Pressure Parameters. Prime Cool utilizes these metrics for precise maintenance charging daily across Pune city.
Fundamental Properties of R-134a
- Boiling Point at 1 Atmosphere: −26.3°C
- Safety Classification: A1 (Non-flammable, non-toxic baseline)
- Ozone Depletion Potential (ODP): 0
- Global Warming Potential (GWP): 1,430
Quick-Reference R-134a P-T Chart
| Saturation Temp (°C) | Pressure (psig) | Pressure (bar g) |
|---|---|---|
| −15°C | 11.8 psig | 0.81 bar |
| −10°C | 16.6 psig | 1.14 bar |
| −5°C | 22.1 psig | 1.52 bar |
| 0°C | 28.3 psig | 1.95 bar |
| 5°C | 35.4 psig | 2.44 bar |
| 10°C | 43.3 psig | 2.99 bar |
| 45°C (Condensing Peak) | 158.9 psig | 10.96 bar |
Field Gas Charging Rules
Always pull a full vacuum down to 500 microns before introducing gas to eliminate non-condensable air and moisture. For standard domestic inverter refrigerators, verify electrical running amps against nameplate specs alongside checking pressure lines to guarantee long compressor lifespans.
Ensure factory calibration. Book a certified system diagnostic visit with Prime Cool.
Need professional technical assistance?
Our technicians service industrial, commercial, and residential cooling systems along the Wagholi–Shirur route daily.