Physical Properties
| Property | Value |
|---|---|
| Freezing Point (°C) | Average -117.5 |
| Critical Temperature (°C) | 72.2 |
| Critical Pressure (bar) | 37.29 |
| Liquid Density (kg/m³) 0°C | 1150.01 |
Is R404A lighter than air?
The vapors are heavier than air and can cause asphyxiation by the displacement of air. Contact with the liquid can cause frostbite. Prolonged exposure to fire or intense heat may cause the containers to rupture violently and rocket.
Is R404A a hazardous material?
Vapour Inhalation High exposures may cause an abnormal heart rhythm and prove suddenly fatal. May have a narcotic effect, very high concentrations may cause anaesthetic effects and asphyxiation. Prompt medical attention is mandatory in all cases of overexposure to vaporised R404A.
Is R404A refrigerant flammable?
The vapor of R-404A may cause irritation to the eyes or skin. R-404A is classified as non-flammable by the U.S. organization ASHRAE. However, if R-404A is pressurized after being mixed with air, there is a possibility that it could become flammable. R-404A must never be mixed with air under any circumstances.
What pressure does R404a run at?
R404a Refrigerant Pressure Chart
| Temperature (Fahrenheit) | Temperature (Celsius) | R404a Pressure |
|---|---|---|
| 20°F | – 5.7°C | 55.3 psi |
| 25°F | – 3.9°C | 62.1 psi |
| 30°F | – 1.1°C | 69.3 psi |
| 35°F | 1.7°C | 77.1 psi |
What is a good superheat for 404a?
Ideally you want to get the head pressure up to around 38’C SCT which on R404a is about 240psi.
How heavy is refrigerant?
It has a molecular weight of 102 g/mol. Air has an average molecular weight of about 29 g/mol. In the absence of adequate air circulation, the refrigerant can sink to the bottom of a container.
Is refrigerant more dense than air?
Freon is 4 times heavier than air and sinks to the ground/floor initially when a leak occurs. Freon will rapidly disperse due to its high volatility.
Is R-404A a HFC?
Freon™ 404A (R-404A) is a blended hydrofluorocarbon (HFC) refrigerant comprised of R-125, R-134a, and R-143a. It was designed to replace R-502 and R-22 used in commercial refrigerator equipment for low and medium temperature ranges.
What refrigerant will replace R-404A?
For cold rooms and other small to medium commercial refrigeration applications, R448A and R449A and R452A or R134a are excellent alternatives to R404A, with from 50 to 65% reduction in GWP. R513A, newer alternative, is also very appropriate in medium back pressure (MBP) applications.
When will R-404A be phased out?
However, there could be a shortage of recycled refrigerants because, from January 2015, the production of these refrigerants will be phased out step-by-step. As of January 1, 2020, the refrigerants R404A and R507 may no longer be produced. From that date, installations may only be refilled with reclaimed refrigerant R404A and R507.
What is the pressure for 410A refrigerant?
According to Refrigeration Service Engineers Society, R-410A operates at a suction pressure of 118 psi and a discharge pressure of 400 psi. This refrigerant operates at pressures 50 to 70% higher than those of R-22 (typically operates with a suction pressure of about 68 psi and a discharge pressure of about 250 psi).
Is R404 Freon compatible with R22?
R404 is a better A/C refrigerant because of the lower temps but works like R410 in heating. The discharge temps are lower than the normal for what an R22 system would see. The new dry R22 units have mineral oil in them so they are already compatable with R404. Many are starting to use that since the price of R22 is getting bad.
