2/2-way solenoid valve, force operated. The sealing element is a metal piston with an annular seat seal made of an elastomer. The E24 variant up to and including DN100 has 2 PTFE piston rings as a design feature and is therefore preferably suitable for the "H2O" application. The valve can be designed with position indicator for OPEN and/or CLOSED. Forced operated valves combine the advantages of servo and direct operated valves. The solenoid valves do not require a pressure difference to open and are perfect automatic shut-off devices for larger nominal diameters.