LASTBREMSVENTIL FÜR SCHIENENFAHRZEUGE MIT PROGRESSIVER FEDERKENNLINIE

The invention relates to a load-controlled brake valve (1) for load-controlled braking of a railway vehicle. Said brake valve (1) comprises a first piston (32, 90) with a first piston rod (86) to which a brake pressure (C) is applied, and one or several second pistons (30, 68) with a second piston rod (74) to which one or several pilot pressures (Cv) are applied. The piston rods (30, 74) cooperate with a movable beam which actuates an intake valve (VE) and a discharge valve (VA), the intake valve (VE) connecting or disconnecting a compressed air reservoir (R) to or from a brake cylinder, and the discharge valve (VA) connecting or disconnecting the brake cylinder to or from the atmosphere (0). The movable beam (34) can be brought in contact with a support (20) whose position relative to the movable beam (34) can be modified by a third piston (10) which is loaded by a load-dependent pressure (T) and the spring pressure of a pressure spring (14). According to the invention, the pressure spring (14) has a progressive load deformation curve.