Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 33

Six-Port Rotary Valve Pods
Thermo Scientific
The check valves are replaceable. For more information about determining if the check valves
are leaking, see "Identifying a Leaking Check Valve"
The six-port valves can be in three different positions: 1–2 position, 1–6 position, and
centered (see Figure 8).
Figure 8. Valve positions
1–2 position
For maintenance purposes, the system tracks the number of valve shifts for each valve
(see "Checking and Resetting the Device Usage Counters"
Note Please note the numbering of the valve ports as depicted in
numbering with valve port 1 in 4 o'clock position). Due to operational reasons, the
graphical representation in this guide or in the instrument's built-in software may show
the valves in a different orientation. Please use only the port numbers for identification of
port positions.
Figure 9.
Valve orientation
Depending on the valve position, the valves perform the functions listed in
Note The EASY-nLC solvent system contains three subsystems, one for each pump.
A subsystem includes the pump, the pressure sensor, the solvent lines to and from the
pressure sensor, and the rotary valve.
on page
1–6 position
on
EASY-nLC 1200 Troubleshooting & Maintenance Guide
1
Introduction
Hardware Components
207.
Centered
page 59)
Figure 9 (clockwise
Table 1.
11