What is the purpose of the air brake system’s safety valve?

The air brake system's safety valve is crucial for maintaining the integrity and safety of the braking system in a vehicle. Its primary purpose is to prevent excessive air pressure buildup within the air brake system. This is a vital function because if the air pressure were to exceed safe limits, it could lead to catastrophic failure of the brakes, posing a serious safety hazard.

The safety valve automatically releases air when the pressure exceeds a predetermined level, ensuring that the system operates within safe parameters. This action protects not only the brake components from damage but also the driver and other road users by ensuring reliable braking performance.

Understanding this function emphasizes the importance of regular maintenance and checks on the air brake system, as a malfunctioning or absent safety valve could lead to brake failure and increase the risk of accidents.