HVAC Refrigerant Gas Pressure Chart & Details
HVAC Refrigerant Gas Pressure Chart & Details
When it comes to air conditioning and refrigeration systems, understanding refrigerant gas pressures is essential for technicians, students, and even homeowners who want to learn more about HVAC systems. Each refrigerant type operates under specific pressure ranges, and maintaining these values ensures efficiency, safety, and longer equipment life.
In this guide, we provide a detailed HVAC refrigerant gas pressure chart with standing pressure, suction pressure, discharge pressure, boiling point, and chemical properties of the most common gases used in modern refrigeration and air conditioning. I think best Refrigerant Gas company Honeywell.
Why Refrigerant Pressure is Important?
- ✅ Helps in diagnosing HVAC system issues
- ✅ Ensures safe and efficient operation
- ✅ Maintains cooling performance
- ✅ Prevents compressor damage
- ✅ Guides technicians in proper charging
- ✅Error code is very important for technicians Get error code list
HVAC Refrigerant Gas Pressure Chart
Here is a quick lookup table for the most popular refrigerants:
| Refrigerant Gas | Standing Pressure (psi) | Suction Pressure (psi) | Discharge Pressure (psi) | Boiling Point (°C) | Chemical Name | Formula |
|---|---|---|---|---|---|---|
| R-22 | 150–155 | 60–70 | 250–300 | -40.8 | Chlorodifluoromethane | CHClF2 |
| R-410a | 225–230 | 120–130 | 450–500 | -51.4 | Mixture of R-32 + R-125 | CH2F2 + CHF2CF3 |
| R-134a | 85–95 | 12–15 | 150 | -26.2 | Tetrafluoroethane | CH2FCF3 |
| R-600a | 40–50 | 0–1 | 150 | -11.7 | Isobutane | C4H10 |
| R-32 | 240–245 | 110–115 | 175–375 | -52.0 | Difluoromethane | CH2F2 |
| R-290 | 125–130 | 65–70 | 275–300 | -42.1 | Propane | C3H8 |
| R-407c | 180–185 | 75–80 | 275–300 | -45.0 | Mixture of R-32/125/134a | Blend |
| R-404a | 180–185 | 80–90 | 275–300 | -46.2 | Mixture of R-125/143a/134a | Blend |
| R-417 | 140 | 65 | 261 | -39.0 | Mixture of R-125/134a/600 | Blend |
Q1: What is the normal suction pressure of R-22?
👉 The normal suction pressure for R-22 is around 60–70 psi, depending on ambient temperature.
Q2: What is the working pressure of R-410a refrigerant?
👉 R-410a typically operates at 120–130 psi suction and 450–500 psi discharge.
Q3: Is R-134a still used in air conditioners?
👉 R-134a is commonly used in refrigerators, cars, and commercial chillers, but it’s being replaced in many regions due to environmental regulations.
Q4: Which refrigerant is eco-friendly?
👉 R-600a (Isobutane) and R-290 (Propane) are considered more eco-friendly, with low Global Warming Potential (GWP).
Q5: Can I replace R-22 with R-410a directly?
👉 ❌ No, you cannot. R-410a requires different equipment, lubricants, and higher pressure handling capacity.