When
Column switching valve is leaking
To change between different valve types
Parts required
Column switching valve as required by the application
Tools required
Screwdriver, Torx T10
Preparations
WARNING
Escape of Hazardous Substances from Flow Connections
Flow and capillary connections can be filled with substances that can pose health risks. Solvent can spray when capillaries burst, slip out of their fittings, or are not properly tightened or when capillary connections are otherwise open.
Turn off the pump flow.
Disconnect all liquid lines connected to the column switching valve.
Disable the valve in the Instrument Configuration Manager dialog box.
Turn off the power to the column compartment. If the power is on, the switching valve can be damaged during replacement.
Do not yet remove the fitting plugs that cover the valve ports on the replacement column switching valve.
Removing the Column Switching Valve
Loosen the 4 screws on the column switching valve.
Keep the screws for installation of the replacement column switching valve.
Carefully pull the column switching valve out of the housing.
Disconnect the cable from the valve drive on the rear of the column switching valve.
If no column switching valve is to be installed afterward, install the column switching valve cover to the column switching valve opening: See Replacing the Column Switching Valve Cover.
Installing the Column Switching Valve
Check the orientation of the cable. The alignment pin in the middle of the connector on the cable should point downward.
Connect the cable to the connector on the rear of the column switching valve.
Push the cable into the housing.
Carefully push the column switching valve into the housing.
With the screwdriver, tighten the 4 screws of the column switching valve.
Remove the fitting plugs that cover the valve ports.
Connect the liquid lines as required by the application. For instructions, see Connecting the Components to a Column Switching Valve.
Turn on the power to the column compartment.
Configure the column switching valve in the chromatography data system:
- In the Instrument Configuration Manager dialog box, select the position (Upper Valve, Lower Valve).
- Select the valve model.
Switch the valve into the different positions and test the flow connections.