Hydraulically pilot-controlled pressure valve

The valve has a main valve designed as a built-in valve controlled by a pilot valve. The main valve in a housing has a piston spring tensioned controlling the linking between a first axial union and a second radial union. The main valve piston is tensioned from the first union pressure in the opening direction. It is tensioned from the spring and from a pressure influenced from the pilot valve in a control chamber lying on the rear side of the main piston in the closing direction. The main valve piston (23) is designed as a stepped piston whose large effective pressure face (27) is assigned to the first union (16) whilst its small effective pressure face (29) bounds the control chamber (31). It has a differential pressure face (35) in an annular chamber (34) sealed from the stepped piston (24) in the housing and which has a connection through a throttle point (37) with the first union.