1.4.1 Column-selection valve operation
The column-selection valve is motorized, enabling the system to automatically switch solvent flow
to one of three columns.
The following figure represents the flow diagram of the column-selection valve when it is installed
in a 30-cm CH or 30-cm CHC module.
Figure 1–5: 3-position, column-selection valve flow diagram
1.5 Column configurations
You can install multiple chromatographic columns of varying size within the 30-cm CH or 30-cm
CHC module's column compartment. The table below lists the supported column configurations.
Note:
Columns are not provided with the Waters 30-cm CH module, the 30-cm CHC module, or
the optional column-selection valve.
Table 1–1: Supported column configurations
Quantity Description
1
length of column = 300 mm; column ID = 7.8 mm, maximum; column guard = 20 mm,
maximum
2
length of column = 300 mm; column ID = 7.8 mm, maximum; column guard = 20 mm,
maximum
December 5, 2017, 715004751 Rev. C
Page 17