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Home >> Audi >> 2010 >> S4 Automatic DCT >> Repair and Diagnosis >> External Pages >> Different car >> Section 965 (Climate Control System (General Information) (Refrigerant Circuit)) >> 87 Air Conditioning >> A/C System, General Information >> Refrigerant R134A Characteristics >> R134A Physical Characteristics

R134A Physical Characteristics

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The vapor pressure curves of R134a and other refrigerants are sometimes very similar, therefore it is not possible to make a certain distinction solely by pressure.

With R134a, the A/C compressor is lubricated with special synthetic refrigerant oils, for example, PAG oils (polyalkylene glycol oils).

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