Translations:Air Brake System Overview/4/en

Brake pipe, pressurized by the main reservoir, is a system of valves, pipes and hoses stretched throughout a whole train. At every coupling, the airflow can be manually opened or closed, by a valve at its base, called the angle cock. This is done on the ends of the train, to prevent the pressurized air from escaping into the atmosphere. Under normal running conditions the brake pipe holds a pressure of 5 bar.