Replacing The Valve Stator And Rotor Seal - Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS

7.12.2 Replacing the Valve Stator and Rotor Seal

Description
Stator for
2-position, 6-port switching valve
2-position, 10-port switching valve
Rotor seal for
2-position, 6-port switching valve
2-position, 10-port switching valve
1. Do not touch any metal or plastic parts inside the column chamber while the
temperature is higher than 50 °C. Before carrying out any work in the column
compartment, wait for the column chamber to cool down.
To shorten the cool-down time, consider setting a lower temperature and opening the
front panel door.
2. Pull the column switching valves toward the front. To do so, turn the lever for the
actuators to the right and pull it toward the front as far as it goes out (→ Fig. 35,
page 78).
3. Grasp the valve for which you want to replace the stator and/or rotor seal and pull
firmly to remove the valve from the actuator.
4. Remove the stator screws, by using a hexagon wrench (size 9/64"). Alternately, loosen
all screws in turn until you can remove them.
Stator screws
5. Remove the stator from the valve body. To avoid damage to the sealing surface turn
the stator so that it rests on its outer surface.
6. Carefully remove the rotor seal with your hand.
To avoid scratches on the sealing surfaces, do not use pointed or sharp-edged tools to
remove or install a seal. Even minute scratches may result in poor sealing performance of
the valve.
Page 214
Fig. 83: Stator screws
Part No.
6041.0007
6041.0005
6041.0008
6041.0006
Operating Instructions