Method and device for pressure regulation and valves for implementing same

The pressure feed method for a brake circuit for the brakes and pneumatic service supply of a railway vehicle uses a brake cylinder supplied by a electrically controlled supply valve from a first distributor. A second, pneumatic, distributor is provided for the brake circuit. The discharge circuit (11,23) of the first distributor (10,11) has an exhaust obturation valve (28) with a main chamber (29) separated by a flexible membrane (14) connected to the input of the second distributor. An Independent claim is included for a circuit for carrying out the above method.