Rotary column selector valve

Abstract

A rotary valve is designed to include a stator with multiple pairs of ports for connection to flow-through components and a rotor with elongated recesses that form flow channels with minimal dead volume and that permit a reversal of flow direction through any component by rotation of the valve through a very small angle.

Description

[0001] Cross-references to related applications [0002] This application claims the benefit of priority to US Provisional Patent Application No. 61 / 346,752, filed May 20, 2010, the contents of which are incorporated herein by reference. Background technique [0003] Rotary valves are used in analytical laboratories and appliances that direct fluid flow to system components such as cylinders, loops, filters, detectors, etc., and for switching between different components and between different fluid sources. Rotary valves can thus be used to select and switch between components for such purposes as sample injection, sample stream selection, fluid diversion, fraction collection, solvent or buffer selection, etc., as well as for different layer Choose between analytical cylinders. A typical rotary valve has a stator and a rotor, with internal passages, usually in the form of slots (elongated depressions), in the surface of the stator or rotor (most often in the rotor), which br...

AI Technical Summary

Problems solved by technology

This complicates the design of the valve and in some cases requires the valve to be turned through 180 degrees, increasing the possibility of user error when the valve is turned too far or not far enough, and when the valve must be turned through When one or more positions are used to achieve the required position, it also increases the possibility of contamination

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