Filters are installed ahead of air line lubricators primarily to remove what?

When filters are installed ahead of air line lubricators, their primary function is to remove moisture from the air supply. Moisture can cause significant issues in pneumatic systems, such as corrosion, malfunction, and decreased efficiency of the lubricators and the tools they supply. By filtering out moisture, the lubricator can effectively deliver a consistent and proper lubrication mist to the air tools, enhancing their performance and lifespan.

While dirt and debris can also be problematic, the specific emphasis in this context is on moisture management, as excessive moisture is often a critical factor in air line performance issues. Cooled air does not present a concern in this scenario, and oil vapors are generally managed by the lubricator itself rather than needing filtration prior to entering the lubricator. Thus, ensuring that the compressed air is dry is essential for optimal operation and reliability of the entire pneumatic system.