What is the primary function of the regulating valve in a train brake system?

The primary function of the regulating valve in a train brake system is to control the maximum pressure in the equalizing reservoir. This is crucial because the equalizing reservoir plays an integral role in the overall brake operation, helping to ensure that the pressure remains at an optimal level for effective braking. By managing the pressure, the regulating valve ensures consistent brake performance across the system, allowing for effective application and release of brakes on the train. This functionality is essential for maintaining safety and responsiveness in the braking system.

Controlling the maximum pressure in the equalizing reservoir directly affects how the brakes respond during operation, as it influences the braking force applied to each car, combining the braking mechanism's efficiency with safety standards.