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

摘要

Switching valve (a) having a stator (202) arranged in a housing (260), which has a plurality of connection ports, and (b) having a rotatable rotor (210) arranged in the housing (260) and defined in predetermined angular positions Switching positions with the stator (202) for fluidic connection or separation of predetermined connection ports cooperates, (c) wherein the rotor (210) by means of a housing (260) arranged bearing and pressing device (230) rotatably mounted and with a predetermined contact pressure in the direction on the stator (202) is acted upon, characterized in that (d) that the bearing and pressing device (230) comprises a spring unit (255), (i) which the rotor (210) or a directly or indirectly connected coupling element (220 ) for transmitting the contact pressure and radial forces, and (ii) which the rotor (210), or the rotor (210) and the directly or indirectly connected coupling element (220), also radially positioned with respect to the stator (202) and supporting such that the rotor (210), or the rotor (210) and the element (220) directly or indirectly connected thereto, are held in a tumble-action and against the stator (202) is pressed.