Where is the circuit protection valve located in an air brake system?

The circuit protection valve in an air brake system is typically located on the primary or secondary air tank of the vehicle. It is typically mounted directly to the tank or nearby on a bracket, and it may be identified by its distinctive shape and fittings. The valve is an important component of the air brake system that helps to prevent air loss in the event of a sudden drop in pressure, such as a broken air line or hose. It works by closing a valve in response to a pressure drop, isolating the affected portion of the system and allowing the remaining brakes to continue to function.
chinafuao.net