Replacing A Rotary Valve - Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual

6
Field Service Maintenance

Replacing a Rotary Valve

Replacing a Rotary Valve
118 EASY-nLC 1200 Troubleshooting & Maintenance Guide
CAUTION Wear powder-free gloves and safety glasses when handling parts of the LC system
that come into contact with solvents.
Replacing a high-pressure valve requires these items:
Tools
• #2 Phillips screwdriver
• 1/4 in. open-ended wrench
• Torx T-10 wrench
• 2.5 mm L-hex wrench
• Flathead screwdriver
To replace a rotary valve, follow these procedures:
1. "To remove a rotary valve,"
2. "To install a new rotary valve"
❖ To remove a rotary valve
1. Close down the EASY-nLC instrument (see
on page 22) and then unplug the power cable.
IMPORTANT Ensure that the EASY-nLC 1200 is unplugged for the next steps.
„Hot-plugging" of the valves will damage the valve electronics.
2. Remove the computer box as described in
3. Using a #2 Phillips head screwdriver, make a quarter-turn to loosen the three captive
screws that secure the right side panel to the instrument housing. Then remove the panel.
4. From the right side of the instrument (solvent system compartment), remove the tubing
from the stator on the valve that you are replacing. Be careful to avoid pulling any fused
silica lines, as there is limited space around the valves.
Tip When replumbing the system, follow the solvent system schematics in
Appendix C, "Consumables and Replacement Parts."
Parts and materials
• Powder-free gloves
• Valve 6790.0001
next procedure
on page 119
"Closing Down the EASY-nLC Instrument"
"To remove the computer box" on page 101.
Thermo Scientific