Q Introduction of Refrigerant Gas R404a
A Basic Introduction of Refrigerant Gas R404a
R404A is a mixture of HFC125, HFC-134a and HFC-143. The ratio is R404A = 44% R125 + 4% R134A + 52% 143A. It is a colorless gas at room temperature, and a colorless and transparent liquid under its own pressure. R-404A is suitable for new commercial refrigeration equipment, transportation refrigeration equipment or renewal equipment at medium and low temperatures. Closest to R-502, this refrigerant is suitable for all environments where R-502 can operate normally.
Product name: R404A (R-404A)
Product Category: HFC
Chemical composition:
pentafluoroethane/trifluoroethane/tetrafluoroethane mixture
Refrigerant R404A, alias R404A, product names include SUVA HP62, SUVA 404A, Genetron 404A, etc. As R404A belongs to the HFC-type non-azeotropic environmentally friendly refrigerant (completely does not contain ozone-depleting CFC, HCFC), it is currently recognized and recommended by most countries in the world as the mainstream low-temperature environmentally friendly refrigerant. Re-added during installation and maintenance. It complies with the standards of the US environmental protection organization EPA, SNAP and UL, and complies with the A1 safety level category of the American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE) (this is the highest level and harmless to humans).
Physical Properties
Physical Properties
Molecular Formula
Molecular Weight
Boiling Point
Freezing Point
Density 30°C(kg/m3)
Critical Temperature (°C)
Critical Pressure (MPa)
ODP
GWP
CHF2CF3/CF3CH2F/CH3CF3
97.6
101.3KPa(° C) -46.60
1017.2
72.1
3.74
0
3800
Quality Index
Quality Index
Purity
Water content
Acidity
Evaporation residue
Chloride content
Appearance
Odor
≥99.90%
≤0.001%
≤0.00001%
≤0.01%
N/M
Colorless and clear
Odorless
Application of R404a Refrigerant
As a widely used medium and low temperature refrigerant today, R404A is often used in cold storage, food freezing equipment, marine refrigeration equipment, industrial low temperature refrigeration, commercial low temperature refrigeration, transportation refrigeration equipment (refrigerated trucks, etc.), refrigerated condensing units, supermarket display cabinets Wait for refrigeration equipment.
Refrigerant R404A is the most common industry standard refrigerant (usually low temperature refrigeration system) to replace Freon R22 and R502 in newly installed refrigeration equipment. R404A is the closest to the operation of R-502, and it is suitable for all R-502 that can operate normally. Environment, R404A is recognized and used by most refrigeration equipment manufacturers in the world. However, because R404A is different from R502 and R22 in physical and chemical properties, theoretical cycle performance, and compressor oil, the after-sales maintenance of refrigeration equipment initially installed as R502 and R22 refrigerants, if you need to add or replace refrigerants, still Only R502 and R22 can be added, usually R404A cannot be used to replace R502 and R22 directly (that is, exchange-type replacement is usually not possible).
Q
R404a Refrigerant Temperature and Relative Pressure
R404a Refrigerant Temperature and Relative Pressure
Temperature Unit: centigrade
Remark: 1KPa≈0.01kg/cm2=0.001MPa，1kg/cm2 ≈98.0665KPa≈0.1MPa