Detector selection from two columns

Two position valve application – 4 port valve

This unique configuration allows analysis of different parts of one analysis with two different detectors, without splitting or multiple injections. For example, fixed gases can be analyzed with a thermal conductivity detector, followed by the analysis of a hydrocarbon fraction with a flame ionization detector.

Move your mouse cursor over Position B to "switch" the valve, or go to a non-animated version.

Position A     Position B

Further reference

More applications with two position valves
Valco injectors and valves
Cheminert injectors and valves