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Briton R404A Refrigerant Gas

Briton R404A Refrigerant Gas is an almost azeotropic mixture of HFC refrigerants, with zero ozone layer depletion, used in new refrigeration equipment at mid-range and low temperatures. It is also an indirect replacement (retrofit), in equipment that previously operated with R-502 and its HCFC replacements such as R-408A, DI-44, and HP80.

It is mainly used in new installations with mid-range and low refrigeration temperatures. The theoretical cooling capacity is 5% lower than R-502 at evaporation temperatures of -40?C. The coefficient of performance (COP) is between 5 and 8% lower than R-502. As superheating increases, R-404A?s COP might become higher than that of R-502. In the case of R-502 retrofits and its HCFC replacements (R-408A, DI-44), 95% of the original mineral oil or alkylbenzene must be replaced by a polyolester oil, the dryer filter and expansion valve changed, rubber O-rings replaced with plastic ones and, occasionally, the size of the condenser must be increased. When it is used as a retrofit for R-22, the safety valves also need to be changed along with any other elements calibrated to R-22 pressures.

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Description

Briton R404A Refrigerant Gas Physical Properties

PROPERTYVALUE
Chemical NamePentafluoroethane Trifluoroethane Tetrafluoroethane
Chemical NotationCF3CHF3, CF3CH3, CFcCH2F
Molecular Weight97.6
Boiling Point @ 1 Atm, (?F)-51.2
Critical Temperature (?F) (ASTM D-1321)161.88
Critical Pressure* (psia)540.82
Saturated Liquid Density @ 86?F, (lb/ft3)63.6
Specific Heat of Liquid @ 86?F, (Btu/lb??F)0.38
Specific Heat of Vapor @ Constant Pressure* (Cp), @ 86? and 1 Atm, (Btu/lb??F)0.19
Flammable range, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition)None
ANSIASHRAE Standard 36-1992 Safety Group ClassificationA1

Additional information

Weight

10.9 kg, 2.7 kg, 650 g

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