| 摘要 |
A valve for the control of a fluid flow, with a connection block (24) having a cylinder-symmetrical recess (25), wherein at least one first and a second entry channel (20, 22, 30, 35) as well as a first and a second exit channel (21, 23, 32, 37) run out in the peripheral surface of the recess. A control pin (29), which is fitted into the recess, is rotatable about a rotation axis (29a), having at least two through-channels (38, 39, 40, 41, 42) and connecting different ones of the entry and exit channels of the connection block to one another depending on its angular position. In order to create a valve which may advantageously be applied with dual blood pump systems and with a low flow resistance and low wear, with a rapid and reliable switching capability, a first through-channel (38, 41) in the pin, with respect to the rotation axis, exclusively connecting channels (30, 31, 32) running out at a first axial height, to one another, and a second through-channel (40, 42) exclusively connecting channels (35, 36, 37) running out at a second axial height, to one another. A corresponding pump system and to a method for operating the system is also disclosed. |
