This part, a important aspect inside business car pneumatic programs, safeguards the first air reservoirs supplying the braking mechanisms. It prevents a catastrophic lack of air strain within the service reservoir from depleting the auxiliary system. As an illustration, ought to an air line rupture within the trailer brake circuit, this gadget isolates the tractor’s air provide, making certain enough strain stays out there to halt the car safely.
Its significance stems from its function in sustaining a practical emergency braking system. It assures that even with compromised auxiliary circuits, the car’s main brakes will nonetheless function, mitigating the danger of accidents. Traditionally, the absence of such a mechanism contributed to quite a few incidents involving runaway autos as a result of full air loss, highlighting the numerous security enchancment it supplies.
