To Align A Rotary Valve Rotor - Agilent Technologies Agilent 7890 Series Maintenance Manual

19
Maintaining a Valve

To Align a Rotary Valve Rotor

WA R N I N G
340
1 Gather the following:
• Flathead screwdriver
• 3- mm hex key wrench
• T- 20 Torx screwdriver
2 Set the oven and valve box heated zones to a safe
handling temperature (25 °C).
Set all valves to Off.
3
The oven, inlet, detector, and valve box may be very hot. If they are
hot, wear heat-resistant gloves to protect your hands.
4 Loosen the adjustment set screw.
Locate the rotor adjustment shaft on top of the actuator.
5
Using a flathead screwdriver, rotate the valve rotor
counterclockwise until it stops, then back it off a small
amount to set one end of the rotor's motion (< 1 mm).
6 Tighten the adjustment set screw.
Turn the valve On, turn Off to check for smooth operation.
7
8 Restore the analytical method.
Rotor adjustment
slotted shaft
Adjustment set screw
Maintaining Your GC