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

摘要

Switching valve for the liquid chromatography, in particular high pressure - switching valve for the high performance liquid chromatography,(a) with a stator (29), in which a plurality of ports are formed, wherein each port by means of a respective channel is formed at one end with a respective connector port (31) is connected and the at the other end to a stator end face of the stator (29) has a predetermined port - opening cross section,(b) with a rotor (23), which cooperates with the stator end face has end surface of the rotor, in which at least one or more grooves are formed, which as a function of the rotary position of the rotor relative to the stator in at least a predetermined switching position respectively predetermined port - opening cross sections connected in a pressure-tight manner,(c) with a drive means (45, 37) for the rotational drive of the rotor (23),(d) with a device (53) for detecting the rotational position of the rotor (23), which a of the absolute or relative position of the rotor (23) corresponding signal is generated,(e) wherein said means for detecting the rotational position of the rotor (23) a substantially load-free rotationally movable transmission member (51) having a front end with the rotor (23) or a fixed against relative rotation, thus substantially in the direction of the coupled coupling element (15) is connected in a rotationally fixed manner, and(f) wherein said means for detecting the rotational position of the rotor (23) is formed so as to the rotational position of the transmission element (51) from the rotor in a region facing away from (23), preferably in a rear end region of the transmission element (51) is detected,(g) characterized in that the transmission element of a rod-like element (53) is.