Hydraulic valve, in particular hydraulic transmission valve, comprising - a valve housing with a longitudinal axis and a receiving opening which extends along the longitudinal axis, the valve housing having a first throughflow opening of a supply connector, a second throughflow opening of a working connector and a third throughflow opening of a tank connector, the throughflow openings (16, 18, 20) being configured such that they can be flowed through at least partially by a hydraulic fluid which flows through the valve housing, - a valve piston with a control groove, which valve piston can be displaced axially along the longitudinal axis in the receiving opening in the valve housing, - with a displacing apparatus for the axial displacement of the valve piston, it being possible for the control groove to be positioned relative to the throughflow openings (16, 18, 20) with the aid of the displacing apparatus, the control groove of the valve piston being configured so as to be capable of bringing about the compensation for the compensation of flow forces of the hydraulic fluid which are directed so as to counteract a first switching position of the hydraulic valve, in which first switching position, starting from the first throughflow opening, the hydraulic fluid flows into the second throughflow opening, and the control groove having a first control face which is configured so as to face the first throughflow opening, and a second control face which is configured so as to lie opposite the first control face, and the control groove having a third control face which connects the first control face to the second control face, the control face being of at least partially inclined and/or curved configuration with regard to the third control face or a virtual face which is configured parallel to the third control face, and a deflecting element being configured between the first control face and the second control face, characterized in that the first control face has a first face section which has a first control edge, and a second face section which is arranged so as to adjoin the first face section, the first face section being of completely inclined configuration with regard to the third control face or the virtual face, and a first angle (α) with a value of greater than 90° and less than 180° being configured between the second face section and the virtual face, and in that a first wall face of the deflecting element, which first wall face is configured so as to face the first control face, is of inclined configuration such that an angle (β) which is greater than 0° and less than 90° is configured between the third control face or the virtual face and the first wall face. - a valve housing with a longitudinal axis and a receiving opening which extends along the longitudinal axis, the valve housing having a first throughflow opening of a supply connector, a second throughflow opening of a working connector and a third throughflow opening of a tank connector, the throughflow openings (16, 18, 20) being configured such that they can be flowed through at least partially by a hydraulic fluid which flows through the valve housing, - a valve piston with a control groove, which valve piston can be displaced axially along the longitudinal axis in the receiving opening in the valve housing, - with a displacing apparatus for the axial displacement of the valve piston, it being possible for the control groove to be positioned relative to the throughflow openings (16, 18, 20) with the aid of the displacing apparatus,