Solenoid valve for possible contact with foodstuffs in accordance with EC standard no. 1935/2004. 2/2-way force-controlled solenoid valve with seals made of pure polytetrafluoroethylene (PTFE white). The sealing element is a flat metal piston with an annular seat seal. The piston is guided in the valve cover by a PTFE piston ring. The valve operates from 0 bar, a minimum pressure difference is not required. The valve opens automatically as soon as the outlet pressure is greater than the inlet pressure.