Terminology

Spring Brake Priority

A spring brake control valve option where priority is given to directing supply air to fill the A spring brake control valve (SBCV) option where priority is given to releasing the parking brakes instead of filling the reservoir(s). When supply line is charged with air with 0 psi in the reservoir(s), it is sent directly to the parking brakes. As the supply line pressure exceeds 80 psi, the pressure protection valve (PPV) in the SBCV opens and fills the reservoir. This priority allows for the release of the parking brakes after they have been applied due to a catastrophic loss of air pressure in the reservoir(s).

Terminology Index