The valve has a pneumatic relay valve (4) for controlling brake cylinder pressure (C) over a pilot circuit (1) for generation of time-defined pilot pressure (CV) for control proportional of the relay valve. An upstream device for generation of braking and release times of compressed air brake (T)…

The valve has a main air line (HL) for providing a pneumatic brake signal applied by a control piston (1) for actuating a valve mechanism (2). A supply pressure spacer (4) is inserted between a maximum relief valve (HDB) and a ventilation terminal (R) of a brake nozzle (5). A pressure reservoir (6)…

A rail vehicle brake test system measures air pressure at nodes (p1-pn) up and downstream of the valves (3-9) and compares the current values with control value related thresholds in a brake diagnosis computer (18) using changes to monitor wear and failures.