Genetron® 422D

A long-term non-ozone depleting replacement for R-22 in low- and medium-temperature commercial refrigeration systems. Suitable for direct expansion evaporators. Do not use in systems that employ flooded evaporators. For new equipment and retrofits.

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General Information

Item Specification
ASHRAE # R-422D
Class HFC
Refrigerant Type Blend
Typical Lubricant Mineral Oil
Substitutes HCFC-22
Contains HFC-125 (65.1%), HFC-134a (31.5%), HC-600a (3.4%)
Glide Moderate
Notes Lower capacity. Can replace HCFC-22 in many cases without having to change compressor lubricant. May be used with alkylbenzene, mineral oil and POE lubricants. If inadequate oil return is observed for AB addition of POE may be needed. Genetron 422D can, in most cases, be used with existing HCFC-22 thermostatic expansion valves.Larger valves may be needed in cases where the R-22 valve is near its maximum capacity.Lower discharge temperature than HCFC-22, which may extend compressor longevity.

Physical Properties

Property Value
Chemical Name Pentafluoroethane, Tetrafluoroethane, Isobutane
Chemical Notation CF3CHF2, CF3CH2F, (CH3)3CH
Molecular Weight 109.9
Boiling Point @ 1 Atm, (°F) -45.76
Critical Temperature (°F) (ASTM D-1321) 175.2
Critical Pressure* (psia) 566.22
Saturated Liquid Density @ 86°F, (lb/ft3) 70.87
Specific Heat of Liquid @ 86°F, (Btu/lb•°F) 0.35
Specific Heat of Vapor @ Constant Pressure* (Cp), @ 86° and 1 Atm, (Btu/lb•°F) 0.2
Flammable range, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition) None
ANSIASHRAE Standard 36-1992 Safety Group Classification A1
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