Pressure-control valve

Pressure-control valve with a first control piston (1), which is disposed between a first pressure chamber (6), which adjoins the first control piston (1) and is connected to at least one working line (A, B), and a second pressure chamber (7), which adjoins the first control piston (1) and is pr loaded against a stop (3) by a first preloading spring (4), and a throttle (8) connecting the first pressure chamber (6) and the second pressure chamber (7), wherein the second pressure chamber (7) is connected to a second control piston 11, which is preloaded by a second preloading spring (17) and which, when a predetermined pressure in the second pressure chamber (7) is exceeded, is displaced to an extent such that a control edge (12) of the second control piston (11) clears a connection of the second pressure chamber (7) to a hydraulic fluid discharge point (23), characterised in that the first control piston (1) comprises a control edge (2) which connects an actuating pressure line (5) to the hydraulic fluid discharge point (23) when the first control piston (1) is displaced against the first preloading spring (4), the throttle (8) being disposed in a bore (9) in the first control piston (1);

• and an actuator (15), which is activated by a control signal, act on the second control piston (11) against the second preloading spring (17), said second control piston (11) having a maximum force exerted thereon and said first control piston being lifted off from said stop (3) when no force is provided by said actuator (15) to thereby produce a maximum pressure in working lines (A, B).