Patent ID: 8071052

Claim:
A liquid separation system adapted for separating compounds of a liquid, comprising: a liquid provider adapted for providing the liquid, a separation unit adapted for separating compounds of the liquid, and an assembly comprising: a valve having at least one revolving valve element; and a coupling device having at least one port coupled to a flow path, wherein said revolving valve element is rotatable to control the amount of liquid flow through said at least one port, the amount of liquid flow being dependent on a relative valve position between the revolving valve element and the coupling device, and a controller configured for performing a calibration procedure to determine relative valve positions of an open range valve position providing a fluid flow higher than a predetermined upper threshold, and a seal range valve position providing a fluid flow of about zero, wherein the controller is further configured to control the revolving valve element to move between the determined open range valve position and the determined seal range valve position.