Sanitary fitting

A sanitary fitting comprising:

• a fitting body;
• a hollow cylindrical mixing shaft chamber, in which a mixing shaft, which is adapted to be operated by a user via a rotation, is rotatably supported about an axis of rotation;
• a hot water inlet;
• a cold water inlet;
• a mixed water outlet open into the hollow cylindrical mixing shaft chamber, the mixing shaft having a control contour on an outer periphery which delimits a mixing chamber, which as a function of the rotational position of the mixing shaft fluidically connects the hot water inlet and/or the cold water inlet to the mixed water outlet to adjust a mixed water temperature, wherein, in at least one mixing shaft end position, the mixing chamber of the mixing shaft is fluidically decoupled from the hot water or cold water inlet port while forming a fluid-tight valve gap between a sealing surface of the control contour of the mixing shaft and an inner peripheral wall of the hollow cylindrical mixing shaft chamber;
• and
• at least one pressure element acting between the fitting body and the mixing shaft, which compresses the mixing shaft with the sealing surface of its control contour against the inner peripheral wall of the hollow cylindrical mixing shaft chamber with a compressive force and reducing the valve gap,
• wherein the at least one pressure element comprises a ring segment of an O-ring,
• wherein the ring segment between the inner peripheral wall of the hollow cylindrical mixing shaft chamber and the mixing shaft is compressed while the compressive force is building,
• wherein the O-ring section adjoining the ring segment in the circumferential direction is not compressed, and
• wherein the hot water inlet, the cold water inlet and the mixed water outlet are disposed within a wet area of the mixing shaft and the ring segment of the O-ring is arranged diametrically opposite to the hot water inlet and the cold water inlet in a dry area of the mixing shaft.