A fluid valve assembly for connection to a supply of fluid under pressure for providing an actuator, particularly a hydraulic or pneumatic actuator, with an actuator fluid pressure, comprising: a valve body with a central bore, the central bore comprising a supply pressure chamber connected to a supply pressure input line; an actuator chamber; and an exhaust chamber; a stem axially-movable within said central bore and actuated by an axial net force F_tot formed by an an axial pilot force F_pil affecting on a first end of the stem and an axial counter force F_sup affecting on an opposite second end of the stem according to an equation Ftot = F_pil - F_sup; a metering edge (PS3, PR3) and a counteracting metering edge (PS4, PR4) arranged coaxially with and controlled by the stem and arranged to control fluid flow from the supply pressure chamber to the actuator chamber and from the actuator chamber to the exhaust chamber, respectively; a seal member arranged coaxially with the stem to divide the supply pressure chamber into an outer supply pressure chamber and an inner supply pressure chamber; the second end of the stem providing a counter piston within the inner supply pressure chamber so that the axial counter force F_sup is provided by the supply pressure affecting on the counter piston within the inner supply pressure chamber, while the outer supply pressure chamber is connected to the supply pressure input line and arranged to feed the actuator chamber; and a restricted flow path between the inner supply pressure chamber and the outer supply pressure chamber for stabilizing the supply pressure in the inner supply pressure chamber, the restricted flow path being configured to prevent propagation of rapid changes of the supply pressure from the outer supply pressure chamber to the inner supply pressure chamber and to thereby prevent uncontrolled axial movements of the stem, characterized in that the metering edge (PS3, PR3) and the counteracting metering edge (PS4, PR4) are pressure-balanced metering edges dimensioned and shaped such that the opposite axial forces exerted on the metering edge (PS3, PR3) by the supply pressure in the outer supply pressure chamber compensate each other to make the resultant fluid pressure force affecting the metering edge (PS3, PR3) be about zero, and the opposite axial forces exerted on the counteracting metering edge (PS4, PR4) by a fluid pressure in the actuator chamber compensate each other to make the resultant fluid pressure force affecting the counteracting metering edge (PS4, PR4) be about zero. a valve body with a central bore, the central bore comprising a supply pressure chamber connected to a supply pressure input line; an actuator chamber; and an exhaust chamber; a stem axially-movable within said central bore and actuated by an axial net force F_tot formed by an an axial pilot force F_pil affecting on a first end of the stem and an axial counter force F_sup affecting on an opposite second end of the stem according to an equation Ftot = F_pil - F_sup; a metering edge (PS3, PR3) and a counteracting metering edge (PS4, PR4) arranged coaxially with and controlled by the stem and arranged to control fluid flow from the supply pressure chamber to the actuator chamber and from the actuator chamber to the exhaust chamber, respectively; a seal member arranged coaxially with the stem to divide the supply pressure chamber into an outer supply pressure chamber and an inner supply pressure chamber; the second end of the stem providing a counter piston within the inner supply pressure chamber so that the axial counter force F_sup is provided by the supply pressure affecting on the counter piston within the inner supply pressure chamber, while the outer supply pressure chamber is connected to the supply pressure input line and arranged to feed the actuator chamber; and a restricted flow path between the inner supply pressure chamber and the outer supply pressure chamber for stabilizing the supply pressure in the inner supply pressure chamber, the restricted flow path being configured to prevent propagation of rapid changes of the supply pressure from the outer supply pressure chamber to the inner supply pressure chamber and to thereby prevent uncontrolled axial movements of the stem, characterized in that the metering edge (PS3, PR3) and the counteracting metering edge (PS4, PR4) are pressure-balanced metering edges dimensioned and shaped such that the opposite axial forces exerted on the metering edge (PS3, PR3) by the supply pressure in the outer supply pressure chamber compensate each other to make the resultant fluid pressure force affecting the metering edge (PS3, PR3) be about zero, and the opposite axial forces exerted on the counteracting metering edge (PS4, PR4) by a fluid pressure in the actuator chamber compensate each other to make the resultant fluid pressure force affecting the counteracting metering edge (PS4, PR4) be about zero.