What prevents total loss of air pressure in the service brake system if an air line ruptures?

In an air brake system, the one-way check valve plays a crucial role in maintaining the integrity of air pressure within the service brake system. This component is designed to allow air to flow in one direction while preventing backflow. When there is a rupture in the air line, the one-way check valve helps to retain the air pressure within the system, thereby minimizing loss of pressure that could lead to brake failure. This ability to maintain pressure is vital for ensuring that the vehicle can continue to operate safely, even in the event of a malfunction in the air line.

The other components mentioned serve different functions. The pressure regulator is responsible for managing air pressure in the system but does not act as a barrier against pressure loss from ruptures. The brake booster assists in applying more force to the brake pedal but does not play a direct role in maintaining air pressure during a rupture. The emergency shut-off valve is related to preventing air from reaching certain areas of the system during a failure, but it is not specifically designed to retain pressure in the service brake system after a line rupture. Each of these components contributes to the overall safety and functionality of the air brake system, but the one-way check valve is specifically critical for preventing total loss of air pressure when an air line