What are automatic drain valves used for in an air brake system?

Automatic drain valves play a critical role in air brake systems by automatically removing moisture from the air tanks. Over time, moisture can accumulate in the air tanks due to the compression of moisture-laden air. If this moisture is not removed, it can lead to several issues, such as freezing of brake components in cold weather, corrosion of the tanks and brake lines, and can ultimately compromise the efficiency and safety of the braking system.

By automatically draining moisture, these valves help maintain the integrity of the air brake system, ensuring that the air supply remains clean and dry. This is essential for optimal brake performance and longevity of the components involved. The presence of such features as automatic drainage contributes significantly to the reliability and safety of air brake systems in commercial vehicles.