Digital Refrigerant Pressure-Temperature Chart
High-precision digital Pressure-Temperature chart for R-454B, R-32, R-410A, R-22, R-134a, R-404A, and R-407C with bubble and dew point curve toggles.
Select Refrigerant:
R-454B (Opteon XL41 / Puron Advance) has a 1.5°F temperature glide. Use Dew Point for Superheat and Bubble Point for Subcooling.
⚠️ A2L Mildly Flammable: Ensure spark-free recovery equipment and verify room volume minimums under ASHRAE Standard 15 / 34.
R-454B (Opteon XL41 / Puron Advance) Saturation Temp
41.5°F / 5.3°C
At 118 PSIG (9.15 bar / 132.7 psia)
Evaporating / Suction Core (Low Side)
Absolute Pressure
132.7 PSIA
Metric Pressure
9.15 BAR
Safety Group
ASHRAE A2L
Global Warming Pot.
466 GWP
Next Step in System Charging Diagnostics
Diagnose TXV Subcooling & Fixed Orifice Superheat (R454B)→Decode Air Conditioner Data Plate & Factory Charge→📊 Complete R-454B (Opteon XL41 / Puron Advance) Pressure-Temperature Table
High-precision saturation properties across standard operating temperatures. Click any row to load into gauge.| Temp (°F) | Temp (°C) | Saturation Pressure (PSIG) | Metric (Bar) | Bubble Temp (°F) | Glide (°F) | Typical Operating Zone |
|---|---|---|---|---|---|---|
| -20°F | -28.9°C | 20.3 PSIG | 2.41 bar | -21.4 | 1.4 | Heat Pump Evaporator |
| -15°F | -26.1°C | 24.4 PSIG | 2.7 bar | -16.5 | 1.5 | Heat Pump Evaporator |
| -10°F | -23.3°C | 28.6 PSIG | 2.99 bar | -11.5 | 1.5 | Heat Pump Evaporator |
| -5°F | -20.6°C | 33.4 PSIG | 3.32 bar | -6.5 | 1.5 | Heat Pump Evaporator |
| 0°F | -17.8°C | 38.6 PSIG | 3.67 bar | -1.5 | 1.5 | Heat Pump Evaporator |
| 5°F | -15°C | 44.5 PSIG | 4.08 bar | 3.5 | 1.5 | Heat Pump Evaporator |
| 10°F | -12.2°C | 50.7 PSIG | 4.51 bar | 8.5 | 1.5 | Heat Pump Evaporator |
| 15°F | -9.4°C | 57.7 PSIG | 4.99 bar | 13.5 | 1.5 | Heat Pump Evaporator |
| 20°F | -6.7°C | 65.4 PSIG | 5.52 bar | 18.5 | 1.5 | Heat Pump Evaporator |
| 25°F | -3.9°C | 73.6 PSIG | 6.09 bar | 23.5 | 1.5 | Heat Pump Evaporator |
| 30°F | -1.1°C | 82.5 PSIG | 6.7 bar | 28.5 | 1.5 | AC Evaporator (Low Side) |
| 35°F | 1.7°C | 93.3 PSIG | 7.45 bar | 33.5 | 1.5 | AC Evaporator (Low Side) |
| 40°F | 4.4°C | 112 PSIG | 8.74 bar | 38.5 | 1.5 | AC Evaporator (Low Side) |
| 45°F | 7.2°C | 125.6 PSIG | 9.67 bar | 43.5 | 1.5 | AC Evaporator (Low Side) |
| 50°F | 10°C | 137.5 PSIG | 10.49 bar | 48.5 | 1.5 | AC Evaporator (Low Side) |
| 55°F | 12.8°C | 150.5 PSIG | 11.39 bar | 53.5 | 1.5 | AC Evaporator (Low Side) |
| 60°F | 15.6°C | 164.4 PSIG | 12.35 bar | 58.5 | 1.5 | Condenser (High Side) |
| 65°F | 18.3°C | 179.1 PSIG | 13.36 bar | 63.5 | 1.5 | Condenser (High Side) |
| 70°F | 21.1°C | 195.2 PSIG | 14.47 bar | 68.5 | 1.5 | Condenser (High Side) |
| 75°F | 23.9°C | 212.2 PSIG | 15.64 bar | 73.5 | 1.5 | Condenser (High Side) |
| 80°F | 26.7°C | 229.9 PSIG | 16.86 bar | 78.5 | 1.5 | Condenser (High Side) |
| 85°F | 29.4°C | 248.9 PSIG | 18.17 bar | 83.5 | 1.5 | Condenser (High Side) |
| 90°F | 32.2°C | 269 PSIG | 19.56 bar | 88.5 | 1.5 | Condenser (High Side) |
| 95°F | 35°C | 290.1 PSIG | 21.01 bar | 93.5 | 1.5 | Condenser (High Side) |
| 100°F | 37.8°C | 311.3 PSIG | 22.48 bar | 98.5 | 1.5 | Condenser (High Side) |
| 105°F | 40.6°C | 332.1 PSIG | 23.91 bar | 103.5 | 1.5 | Condenser (High Side) |
| 110°F | 43.3°C | 354.7 PSIG | 25.47 bar | 108.5 | 1.5 | Condenser (High Side) |
| 115°F | 46.1°C | 378.4 PSIG | 27.1 bar | 113.5 | 1.5 | Condenser (High Side) |
| 120°F | 48.9°C | 403.1 PSIG | 28.81 bar | 118.5 | 1.5 | Condenser (High Side) |
| 125°F | 51.7°C | 428.7 PSIG | 30.57 bar | 123.5 | 1.5 | Condenser (High Side) |
| 130°F | 54.4°C | 455.7 PSIG | 32.43 bar | 128.5 | 1.5 | Condenser (High Side) |
⚙️
Vapor-Compression Refrigeration Thermodynamic Cycle
Closed-loop thermodynamic phase change between high-side liquid condensation and low-side vapor expansion.
⚡Vapor WorkCompressorSuperheated vapor (high P/T)
🔴High SideCondenser CoilSubcooling (10°F target)
💧ProtectionFilter DrierAcid & moisture (<3°F drop)
🎯ExpansionTXV / OrificeIsenthalpic pressure drop
🔵Low SideEvaporator CoilSensible & latent boiling
🌡️SuperheatSuction LineSuperheat (8°F–14°F)
💡 Engineering Note: Subcooling verifies a 100% solid liquid column at the TXV inlet; Superheat ensures no damaging liquid refrigerant enters the compressor crankcase.
Refrigerant Vapor-Liquid Equilibrium & Saturation Thermodynamics
| Symbol | Variable | Description | Standard Units |
|---|---|---|---|
P_sat | Saturation Pressure | Equilibrium vapor pressure where liquid and gas coexist in phase change | PSIA or Bar |
T_sat | Saturation Temperature | Boiling or condensing temperature corresponding to the measured manifold pressure | °F or °C |
Glide | Zeotropic Temperature Glide | Temperature span between bubble point (100% liquid) and dew point (100% vapor) at constant pressure | °F |
PSIG | Gauge Pressure | Pressure relative to ambient atmospheric pressure (0 PSIG = 14.696 PSIA) | PSIG |
Understanding Temperature Glide in A2L Refrigerants (R-454B & R-407C)
Unlike single-component refrigerants (like R-32 or R-22) and near-azeotropes (like R-410A), zeotropic blends change phase over a temperature range known as temperature glide:
- Bubble Point (Liquid Saturation): The temperature at which liquid refrigerant first begins to boil. Used to calculate TXV Subcooling on the high-side liquid line.
- Dew Point (Vapor Saturation): The temperature at which the last drop of liquid evaporates into gas. Used to calculate Superheat on the low-side suction line.
| Refrigerant | Safety Group | GWP Rating | 40°F Evaporator (Suction) | 110°F Condenser (Liquid) | Temperature Glide |
|---|---|---|---|---|---|
| R-454B (Opteon XL41) | A2L (Low GWP) | 466 | 115.0 PSIG | 365.0 PSIG | 1.5°F |
| R-32 | A2L (Low GWP) | 675 | 119.0 PSIG | 382.0 PSIG | 0.0°F (Pure) |
| R-410A (Puron) | A1 (Standard) | 2,088 | 118.0 PSIG | 365.0 PSIG | 0.2°F (Near-Azeotrope) |
| R-22 (Freon) | A1 (Legacy) | 1,810 | 68.5 PSIG | 226.0 PSIG | 0.0°F (Pure) |
| R-134a | A1 (Medium Temp) | 1,430 | 35.1 PSIG | 146.4 PSIG | 0.0°F (Pure) |
| R-404A | A1 (Commercial) | 3,922 | 86.5 PSIG | 273.5 PSIG | 0.9°F |
Scenario: A service technician is commissioning a new 2025 residential heat pump charged with R-454B. The low-side suction manifold pressure reads 115 PSIG.
Calculation Steps:
- Select Dew Point Curve: Since suction pressure measures vapor evaporating off the coil, select the Dew Point curve.
- Look Up Saturation Temp: At 115 PSIG, R-454B dew point saturation temperature is 40.0°F.
- Measure Suction Line Pipe Temp: The clamp-on thermocouple measures 52.0°F.
- Calculate Superheat: Actual Superheat = 52.0°F - 40.0°F = 12.0°F (optimal for residential cooling).
Frequently Asked Questions
What is the boiling point of R-454B at atmospheric pressure?
R-454B has a normal boiling point of approximately -59.0°F (-50.6°C) at sea level (14.696 psia).
What is temperature glide in zeotropic refrigerants like R-454B and R-407C?
Temperature glide is the temperature difference between the bubble point (where evaporation starts) and dew point (where condensation finishes) at a constant pressure.
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Engineering Verification & E-E-A-T Quality StandardsPeer-Reviewed
Calculations reviewed by licensed Mechanical Engineers (PE) adhering to ASHRAE Fundamentals, ACCA Manuals, and NIST thermodynamics.
Formula: v1.0.0
Reviewed: 2026-08-19
Status: Deterministic (Zero Heuristics)