The piston damping valves which are pressure-dependent are for an exchange of damping fluid in the tractive and pressure stages. The piston divides the damping cylinder into two work chambers. Through passages channels are provided through which flows pressure medium activating the damping valves. The piston (13) is arranged on a control pin (2), which has a first valve seat for a control slide (5) arranged in a first by-pass channel system (7,8), throttling the medium throughflow present. The control slide is electro-magnetically operable. A second valve seat for a control thruster (3) is arranged in a second by-pass channel system (9-11).
