15 Maintaining a Valve
To Remove the Upper Valve Box
236 Maintaining Your GC
To Remove the Upper Valve Box
1 Gather a T-20 Torx screwdriver.
2 Set the valve box to a safe handling temperature (25 °C), or prepare for maintenance:
Maintenance > Instrument > Perform Maintenance > Maintenance Mode > Start
Maintenance. Wait for the GC to become ready.
The oven, inlet, detector, and valve box may be very hot. If they are hot, wear heat-resistant
gloves to protect your hands.
3 Lift and remove the detector cover.
4 Remove the mounting screws from the upper valve box.
5 Lift up and set aside.
6 Exit maintenance mode. Select Maintenance > Instrument > Perform Maintenance >
Maintenance Mode > Finished.
The valve box insulation is made of refractory ceramic fibers (RCFs). To avoid inhaling RCF
particles, we recommend these safety procedures:
• Ventilate your work area
• Wear long sleeves, gloves, safety glasses, and a disposable dust/mist respirator
• Dispose of insulation in a sealed plastic bag
• Vacuum any residual particles and discard
• Wash your hands with mild soap and cold water after handling RCFs.
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