What is the function of the towing cock in train operations?

The function of the towing cock in train operations is primarily to lower the main reservoir pressure to a specific level, such as 700kPa, during rescue operations. This action is crucial because it allows for the safe and efficient coupling of the rescue train to the stranded or malfunctioning train. By reducing the main reservoir pressure, it prevents potential risks of accidental brake application or other malfunctions that could occur if the pressure were too high, ensuring a smoother process during rescue.

In the context of train operations, understanding how the towing cock functions is essential for operational safety, especially in emergency situations where quick response and accurate execution of procedures are necessary for minimizing disruptions and ensuring the safety of passengers and crew.