What type of pressures are typically regulated by a moisture separator in an air line system?

A moisture separator in an air line system is designed to remove moisture from the compressed air. This is critical because moisture can cause various issues, such as corrosion, freezing, and malfunction of pneumatic tools and equipment. The operation of moisture separators generally occurs at lower pressures, which corresponds to the typical operating conditions of air lines in many systems.

When the moisture separator functions, it regulates the pressures within the system to prevent excessive moisture accumulation. Since air lines often operate at relatively low pressures, typically below 150 psi in many industrial applications, the correct answer identifies the pressures that moisture separators deal with closely.

While moisture separators can experience exposure to different pressure levels, including high pressure on the input side, their primary function and regulation mechanism focus on managing and separating moisture within the low-pressure environment that characterizes most air lines. Therefore, understanding this aspect of moisture separators clarifies why low pressures is the appropriate choice.