Poly ester oil can tolerate a mixture of which percentage of mineral oil?

Polyester oils, often used in refrigeration systems, have specific compatibility characteristics when mixed with other oil types, particularly mineral oils. In this case, polyester oil can tolerate a mixture of 3 to 5% mineral oil without significantly affecting its performance or the efficiency of the refrigeration system.

When polyester oil is mixed with mineral oil, exceeding this percentage can lead to issues such as decreased lubrication efficiency, potential chemical reactions, and separation of the oils, which can compromise system performance. The proper mixing limits help in maintaining the characteristics of the ester oil while also allowing for the slight presence of mineral oil, which may still exist in older systems or during maintenance activities.

Understanding these percentages is crucial for technicians to ensure the longevity and reliability of refrigeration systems, as well as to prevent mechanical failure that could arise from inappropriate oil mixtures. Therefore, the 3 to 5% mixture range is a safe boundary for maintaining the integrity of polyester oil in refrigeration applications.