
Chapter 6: Shutdown and Maintenance 219
Sonicate the nozzle in a test tube containing DI water or a mild detergent.
Repeat the sonication as needed until the nozzle is clean.
7 After sonicating, place the O-ring back into the groove in the nozzle, then
allow the nozzle to air dry for a few minutes.
8 Make sure the ferrule is on the tubing, then screw the nut back into the
hole in the side of the closed-loop nozzle. See Figure 6-20.
Replacing the Tubing on Closed-Loop Nozzle
To replace the tubing from the close d-loop nozzle, use this procedure. See
Figure 6-20. Use a 7-inch length of sample tubing from the accessory kit as the
replacement.
Figure 6-20 Replacing tubing from closed-loop nozzle
1 Unscrew the nut from the closed-loop nozzle and from the union fitting and
pull out the tubing from both places.
Make sure the ferrule comes out on the tubing on both ends. If not, use the
ferrule tool to remove it. See Figure 6-12 on page 207.
2 Slide the nut and ferrule off each end of the tubing.
3 Slide the nut and ferrule onto the new tubing as shown in Figure 6-20.
Insert the tubing into the closed-loop nozzle and slowly tighten the nut
until secure. Do not over-tighten. Make sure the tubing is pushed all the
way in while tightening the nut.
closed-loop
nozzle
ferrule
nut tubing
7-inch length
union fitting
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