Physical and Chemical Properties
| Chemical Name | Pentafluoroethane (R-125), 1,1,1-Trifluoroethane (R-143a) |
| Chemical Formula | CHF2CF3/CH3CF3 |
| Molecular Weight | 98.9 g/mol |
| Form | Liquefied Gas |
| Color | Colorless |
| Critical Pressure | 37.9 (Bar abs) |
| Critical Density | 500 (Kg/m³) |
| Vapor Pressure | 12.74 (Bar abs) |
Description
Ametron® Refrigerants R-507 is an azeotropic mixture consisting of R-125 and R-143a. Their thermodynamic characteristics constitute the ideal replacement for R-502 in refrigeration sector at low and medium temperature. It is characterized by its chemical stability, its good thermodynamic properties and low toxicity. The main application is in low and medium temperatures for new installations.
There is also the possibility of converting an R-502 installation to R-507, by removing 95% of mineral oil or original alkyl benzene by polyolester oil. It is necessary to change the drier filter (molecular sieve XH9
recommended), replace the expansion valve by one of R-507 and oversizing the condenser. R-507 is a mixture of HFC refrigerants, which are not compatible with traditional lubricants working with R502. The only lubricant suitable to use is polyolester oil (POE).
