SEALING SYSTEM FOR SWITCHABLE WATER VALVE

The invention concerns a sealing system for switchable water valves for use in heating appliances and water heaters. The sealing system consists of a valve body (17) with a disposed cartridge (6) and a self-locking linear drive. The sealing body (5) is disposed directly on the valve actuating rod (3) and joined to it. The sealing body (5) consists of a sealing body main part (2) with one or two disc-shaped central ribs (12) disposed on it. The sealing body main part (2) has two press-fitted specially shaped sealing rings (1) of the O-ring type spaced a defined distance from each other by the one or two central ribs (12). These two sealing rings (1) are fixed in their positions by two circumferential flange ribs (15) formed at each outer end of the sealing body main part (2). The sealing rings (1) are shaped such that a cavity (4) is formed at the back of the sealing rings (1) between the rear sealing surface (8) of the sealing rings (1) and the one or the two central ribs (12) and the sealing body surface. This cavity (4) allows the sealing ring (1) to make better contact with the sealing surfaces of the sealing body main part (2) and the central rib (12). Leakages are thus reliably prevented.