The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and a second switching position, in which the injection nozzle is in communication with a common rail. To improve the function and quality of the injection, the 3/2-way valve includes two force-balanced control pistons, which are guided separately from one another, and on each of which a respective valve seat edge is embodied.