What is the function of a low-loss fitting?

The function of a low-loss fitting is primarily to minimize the release of refrigerant when a connection is made or broken. These fittings are designed to create a tighter seal, which reduces the amount of refrigerant that escapes into the atmosphere during charging or servicing of refrigeration and air conditioning systems. This feature is particularly important in the context of environmental protection regulations that aim to limit refrigerant emissions due to their potential impact on the ozone layer and global warming.

While other options refer to different tools and components related to refrigeration systems, they do not capture the main purpose of low-loss fittings. Measuring refrigerant pressure or increasing flow efficiency are functions of different tools and components, not the core function of low-loss fittings. Preventing refrigerant from entering the atmosphere is a broader environmental goal, but low-loss fittings specifically focus on minimizing loss during disconnection, which directly contributes to this goal.