What is pag refrigerant lubricant?

PAG (Polyalkylene Glycol) refrigerant lubricant is a synthetic oil commonly used in modern refrigerant systems, particularly those employing R-134a and R-1234yf refrigerants. It is designed to provide Excellent lubrication, thermal stability, and compatibility with various materials used in HVAC and automotive applications. PAG lubricants have good moisture resistance and help improve the efficiency and longevity of the compressor systems. However, they can be hygroscopic, meaning they absorb moisture from the air, which can be a concern if not handled properly.