Switching valve, in particular high-pressure switching valve for high performance liquid chromatography

switching valve (A) which is arranged in a housing (260) stator (202) having a plurality of connecting ports which, and disposed (b) having a housing (260), rotatable rotor (210) which cooperates in predetermined, defined by respective angular positions switching positions with the stator (202) for fluidic connection or disconnection of predetermined connection ports, (C) being mounted to the rotor (210) disposed in the housing by means of a (260) bearing and pressing-on device (230) is rotatably mounted and applied with a predetermined pressing force in the direction of the stator (202) characterized, (D) the bearing and pressing-on device (230) comprises a spring unit (255), (I) which acts upon the rotor (210) or a directly or indirectly connected so that the coupling element (220) for transmitting the contact pressure force and the radial forces, and (Ii) which is also radially positions the rotor (210) or the rotor (210) and thereby directly or indirectly associated coupling element (220) in relation to the stator (202) and transmits such a way that the rotor (210), or the rotor (210) and thus directly or indirectly connected member (220) held taumelbar and pressed against the stator (202).