How does a circuit protection valve work?

A circuit protection valve is a safety device used in air brake systems on large commercial vehicles, such as trucks, buses, and trailers. The purpose of the circuit protection valve is to protect the air brake system from damage in the event of a leak or other failure.
The circuit protection valve works by monitoring the air pressure in the brake system. When the pressure drops below a certain level, the valve closes and isolates the affected part of the system, preventing further air loss. This helps to ensure that the rest of the system remains operational, so the driver can still apply the brakes to slow or stop the vehicle.
The circuit protection valve typically consists of a valve body with an internal piston and spring, as well as an inlet port and two outlet ports. When the air pressure in the system drops, the piston is pushed down by the spring, causing the valve to close and isolate the affected part of the system. The valve remains closed until the pressure in the system is restored to a safe level.
In addition to protecting the air brake system from damage, the circuit protection valve also helps to prevent accidents by ensuring that the driver can still apply the brakes in the event of a leak or other failure. Proper maintenance and testing of the circuit protection valve is essential to ensure its proper functioning and prevent accidents.
chinafuao.net