Spool valve for hydraulic systems

having a slide valve for hydraulic systems such as proportional pressure control valves or pressure balances, with a preferably constructed in the form of a screw-in valve body (1), in which a valve slide (15) is axially movable and an inflow opening (3), via the fluid in the valve housing (1) einstrombar, and formed with at least one in the wall of the valve housing (1) discharge opening (23) in dependence on the axial position of the valve spool (15) therethrough closable or for the outflow of fluid from the valve housing (1) is releasable, is characterized in that in the inner wall of the valve housing (1) incorporated annular groove (27) is present, which is with respect to their axial position at the level of the at least one outflow opening (23) positioned such that a control edge (21) of the valve spool (15) releasing in the during its movement from the discharge opening (23) closing position Position overflows the annular groove (27).