Refrigerant R1234YF, Physical Characteristics
- The vapor pressure curves of both refrigerant R1234yf and R134a are very similar across a large temperature range for this reason no differentiation of the two refrigerants is possible. Refer to REFRIGERANT VAPOR PRESSURE TABLE and the Refrigerant R134a Servicing, A/C System General Information. Differentiating is only possible using sensors that can analyze the chemical composition of the refrigerants. Refer to REFRIGERANT R1234YF ANALYSIS .
- With R1234yf, the A/C compressor is lubricated with special synthetic refrigerant oils, for example PAG oils (polyalkylene glycol oils) which are specified to the refrigerant R1234yf, the A/C compressor and the operating conditions of the specified additions (additives).