R-422B is a refrigerant gas specifically formulated as a blend of hydrofluorocarbons (HFCs) and a hydrocarbon. It is widely used as a direct replacement for R-22 in many air conditioning and medium-temperature refrigeration systems.
Composition of R-422B
The exact composition of R-422B is a blend of three distinct chemical compounds. While specific percentages can vary slightly by manufacturer, the typical and widely recognized composition by weight is as follows:
| Component | Chemical Name | Typical Percentage (by Weight) |
|---|---|---|
| R-125 | 1,1,1,2,2-Pentafluoroethane | 85% |
| R-134a | 1,1,1,2-Tetrafluoroethane | 12% |
| R-600a | Isobutane | 3% |
This unique blend provides performance characteristics that closely match those of R-22, facilitating its use in existing equipment with minimal modifications.
Characteristics and Use
R-422B is recognized as a colorless, volatile liquid that typically presents with an ethereal and faint sweetish odor. It is classified as a non-flammable material, enhancing its safety profile for handling and application as a refrigerant. This refrigerant is primarily intended for use in various refrigeration and air conditioning applications.
