Bio-Rad ChromLab™ Software - Manual (Page 59)

Valves
Instrument Guide | 57
Ports on the Column Switching Valve
Port Function
Top 1–5 Ports to connect to the top of columns
Bottom 1–5 Ports to connect to the bottom of columns
In Inlet port from the system pump through precolumn pressure sensor
Out Outlet port through the postcolumn pressure sensor to the UV
detector