damping medium is led in a second loop s 2 corresponding to the first loop but in the opposite direction see the solid arrows in fig1 the valves 10 and 11 are shown in more detail in fig2 the valves 10 11 are of identical design and have a valve core 12 with ducts 12 a 12 b extending through the core 12 the ducts being defined by flexible leaf valves 13 so called shims and the ducts 12 b being defined by a rigid leaf valve or a disk 14 the two types of leaf valves are arranged on either side of the piston 12 the rigid leaf valve 14 is pressed by a spring 26 against one side of the core 12 also incorporated in the valve body is a conical leakage flow determining valve 22 arranged in a leakage flow duct 23 the position of which in the valve body is adjustable from outside the damper via an adjusting wheel 24 the side of the valve core 12 where the flexible leaf valves 13 are arranged adjoins the valve chambers 10 a 11 a and the opposite side of the valve core adjoins the first and second flow ducts 16 a 16 b in the first fixing element 6 the damping characteristics of the valve are adjusted by varying the number of shims 13 or by adjusting the bleed aperture in the leakage flow duct 23 the number of shims and the size of the bleed aperture may naturally vary for the compression or rebound valve when a flow caused by the movements of the main piston 2 creates such a high pressure in the ducts 12 a 12 b passing through the valve core 12 that a force is.