solely by the pressure valve spring 20 so that under all operating conditions the crimped ring 46 is not required to assume or absorb any axial forces the valve seat 27 of the relief valve 26 embodied as a ball valve is cut into an inner bottom face of a bottom 36 of the filler piece 31 remote from the pressure valve body 22 the bottom 36 being provided with a relief bore 35 the pressure valve body 22 is provided in the area of its cylindrical protrusion 22b and a sealing cone 22c with a central return flow bore 38 which depending on the embodiment of the pressure valve body 22 is capable of passing through the pressure valve body in its longitudinal axis see fig2 for example or as shown discharges into a transverse bore 39 below the sealing cone 22c which cooperates with the valve seat 21 by means of this return flow bore 38 with the associated transverse bore 39 the fuel controlled by the relief valve 26 and flowing back to the pump work chamber 16 through the interior of the filler piece 31 is capable of bypassing the valve seat 21 when this valve seat is closed in order to damp the equal pressure relief and to prevent uncontrolled oscillations of the relief valve 26 at least one of the bores 35 38 39 which during relief experience a flow of fuel is embodied as a throttle bore this is preferably the relief bore 35 the return flow bore 38 or the transverse bore 39 which follows this relief bore 35 during the equal pressure relief may likewise be embodied as a throttle bore the two throttle bores must then be adapted to one another such that disadvantageous oscillations of the.