HPLC Column selection

SD configuration – high pressure
(Non-Java)

This example illustrates a high pressure SD valve (or Cheminert Model C5) used for HPLC column selection. This allows multiple columns to be installed permanently in the system, eliminating instrument downtime and leakage potential resulting from having to change columns repeatedly. The SD valve selects only column inlets – the column outlets are connected to the detector via a low-volume manifold.

Step 1:
Sample flows from the injector through the SD valve to the inlet of Column 1, and through the manifold to the detector.

Step 2:
The SD valve is advanced to select Column 2.

Step 1 Sample flows from the injector through the SD valve to the inlet of Column 1, and through the manifold to the detector. View step 2.

Step 2 The SD valve is advanced to select Column 2. View step 1.

Further reference

More applications with multiposition valves
Valco multiposition valves – SD configuration (high pressure)
Cheminert multiposition valves – Model C5