to use an R 134a compressor with the same displacement as used for R 12. However, to obtain the same refrigerating capacity under LBP conditions, it is necessary to select an R 134a compressor with the next higher displacement to the one used for R 12. Fig. 3 - System’s characteristic curve versus compressor’s HFC-134a does not contain chlorine; therefore, it has an ozone depletion potential (ODP) of zero. Listed below are all generic and DuPont trade names: Hydrofluorocarbon-134a HFC-134a HFA-134a Suva® 134a Suva® 134a (Auto) Formacel® Z-4 (foam blowing agent market) Dymel® 134a (aerosol market) The chemical properties of HFC-134a are listed propagation, not toxic) as R134a. Therefore, a field retrofit with the same system safety concept and safety components is generally possible. 5) The system capacity and efficiency can be somewhat different with R450A or R513A from what they are with R134a. For medium temperature conditions, R450A shows approximately 87% capacity with similar HFCs are a class of chemicals used as refrigerants, in fire suppression systems, and in certain scientific equipment. HFCs are greenhouse gases (GHGs) with global warming potentials (GWPs) hundreds to thousands of times higher than carbon dioxide. The United States (U.S.) Environmental Protection Agency (EPA) is implementing the HFC phasedown Isomers (molecule with the same chemical formula as another molecule but with a different chemical structure) are identified with a lower case letter after the number (for example, R-134a). Refrigerant blends having the same pure components but with different compositions are identified with an upper case letter after the number to make the change from CFC-12 (R-12) to HFC-134a (R-134a), the following guidelines are recommended. CONSIDERATIONS 1. Retrofitting systems that employ compressors manu-factured prior to 1973 is not recommended. This is due to the different materials used in motor insulation that have not been evaluated for compatibility with the new R-134a Refrigerant PT Chart. R-134a is the most common refrigerant found in automobiles today. It has been in use since the early 1990’s and now, in 2019, we are beginning to see it’s popularity wane with the rise of the new HFO refrigerant known as R-1234yf. That being said, there are still millions of cars on the road that use R-134a and CFCs, or Chlorofluorocarbons, are the original refrigerant. They consist of Carbon, Chlorine, and Fluorine. When you hear someone say ‘Refrigerant,’ they are referring to CFCs. HCFCs, or Hydrochloroflourocarbons, are the close neighbor of CFCs. The main difference between the two types of refrigerant is that HCFCs contain one additional This SAE Standard is to establish the specific minimum equipment requirements for the recovery/recycling of HFC-134a that has been directly removed from, and is intended for reuse in, mobile air-conditioning systems and recovery/recycling and system recharging of recycled or virgin HFC-134a. Decafluoropentane. CF 3 CHFCHFCF 2 CF 3. 1,640. Some refrigerants are not single chemicals but a mixture of two or more chemicals, called blends. HFC blends may contain only HFCs, or HFCs mixed with other chemicals. For example, R‑410A is made up of 50% R‑32 and 50% R‑125. ZcvWw7E.