Valve assembly with at least one valve control group (2, 2a) containing first and second valve units (3, 4), which are interconnected fluidically and each of which has an oblong valve chamber (12, 13) peripherally bounded by a wall body and a valve plunger (15, 16) axially displaceable in the valve chamber (12, 13), wherein in each valve chamber (12, 13) there is located an axially oriented valve seat, which is stationary with respect to the wall body and frames an overflow opening connecting a first valve chamber section (12a, 13a) located on the side of the valve seat to a second valve chamber section (12b, 13b) located on the opposite side, wherein opposite the valve seat in the first valve chamber section (12a, 13a) there is located a shutoff section of the valve plunger (15, 16), which shutoff section can be moved within an axial control movement of the valve plunger (15, 16) between a closed position bearing against the valve seat and thus closing the overflow opening and at least one open position lifted off the valve seat and thus allowing a fluid transfer between the two valve chamber sections (12a, 12b; 13a, 13b), wherein the first valve chamber section of the first valve unit and the second valve chamber section of the second valve unit are in constant fluid connection with each other and with a working opening connectable to a user, and wherein each valve plunger (15, 16) passes through the associated overflow opening and has a first closure section (15a, 16a) tightly closing the first valve chamber section (12a, 13a) on the side axially opposite the overflow opening and a second closure section (15b, 16b) tightly closing the second valve chamber section (12b, 13b) on the side axially opposite the overflow opening, wherein the diameters (D1, D2) of the two closure sections (16a, 16b) of each valve plunger (15, 16) are the same as each other and moreover the same as or slightly smaller than the diameter of overflow opening, - wherein the second valve chamber section of the first valve unit communicates with a relief opening, which can be routed to a pressure sink, and the first valve chamber section of the second valve unit communicates with a feed opening, which can be connected to a pressure source, - wherein the valve assembly contains an electrically actuable control device designed to apply a drive force to the valve plungers (15, 16) for the purpose of inducing their control movement and for predetermining their respective switching position, - and wherein the valve units (3, 4) are of a design that can be actuated by fluid power, wherein the control device is an electro-fluidic control device containing an electrically actuable pilot valve device designed to apply a drive fluid delivering the drive force in a controlled manner to the valve plungers (15, 16) based on electric control signals originating from an electronic control unit of the control device, characterised in that - the control device is a proportional control device by means of which the valve plungers (15, 16) can be positioned in an infinitely variable manner optionally in the closed position and in several open positions opening up different flow cross-sections of the overflow opening, - wherein the control device contains a distance measuring system detecting the current switching position of the valve plunger (15, 16) for each valve unit (3, 4), - wherein the control unit is capable of electrically controlling the pilot valve device on the basis of the measured values of the distance measuring system and additionally taking into account external feedback data in such a way that the valve plungers (15, 16) of the two valve unit (3, 4) are positioned as required. - wherein the second valve chamber section of the first valve unit communicates with a relief opening, which can be routed to a pressure sink, and the first valve chamber section of the second valve unit communicates with a feed opening, which can be connected to a pressure source, - wherein the valve assembly contains an electrically actuable control device designed to apply a drive force to the valve plungers (15, 16) for the purpose of inducing their control movement and for predetermining their respective switching position, - and wherein the valve units (3, 4) are of a design that can be actuated by fluid power, wherein the control device is an electro-fluidic control device containing an electrically actuable pilot valve device designed to apply a drive fluid delivering the drive force in a controlled manner to the valve plungers (15, 16) based on electric control signals originating from an electronic control unit of the control device, - the control device is a proportional control device by means of which the valve plungers (15, 16) can be positioned in an infinitely variable manner optionally in the closed position and in several open positions opening up different flow cross-sections of the overflow opening, - wherein the control device contains a distance measuring system detecting the current switching position of the valve plunger (15, 16) for each valve unit (3, 4), - wherein the control unit is capable of electrically controlling the pilot valve device on the basis of the measured values of the distance measuring system and additionally taking into account external feedback data in such a way that the valve plungers (15, 16) of the two valve unit (3, 4) are positioned as required.