Braking system for a railway vehicle

A braking system for a rail vehicle having braking members with at least one lining or at least one block, the braking system comprising:

• a regulating device disposed between (a) a braking device having a cylinder and piston that is moveable relative to the cylinder to act on the braking members and (b) a source of pressure agent configured to supply the braking device with a pressure agent to cause the piston to move, the regulating device configured to control a pressure value of the pressure agent passing between the regulating device and the braking device to a predetermined value,
• the regulating device comprising a regulating valve provided with a body having a longitudinal main cavity and, opening into the main cavity, a supply channel, a venting channel and a regulating channel located between the supply channel and the venting channel, the regulating device also comprising a slide having an internal chamber and at least one supply port opening into the internal chamber, at least one venting port opening into the internal chamber, and at least one regulating port opening into the internal chamber and located between the at least one supply port and the at least one venting port;
• the at least one supply port and the at least one venting port of the slide each having a general cross-section for passage of the pressure agent substantially having a shape with at least one apex;
• the slide being moveably mounted in the main cavity of the body between a supply position in which the at least one supply port faces the supply channel of the body, and a venting position in which the at least one venting port faces the venting channel of the body;
• the regulating device configured to have a substantially stable regulating configuration in which the pressure value of the pressure agent passing between the regulating device and the braking device is limited to the predetermined value, and in which the slide is positioned in the main cavity of the body such that the at least one regulating port faces the regulating channel of the body whereas the at least one supply port and the at least one venting port are respectively away from the supply channel and the venting channel of the body.