Fitting Assembly - LC Packings SWITCHOS II User Manual

Modifications
D.2
Caution: Never use the inert (PAEK) injection/switching valve to pre-assemble a
CAUTION
fitting and never use any tool to tighten the fingertight nut. This may lead to
damage of the valve.
To assemble the PEEK sleeve fitting (using the supplied stainless steel union):
a) Slide the fingertight nut and the ferrule onto the sleeve as shown in
FIGURE D-1.
b) Insert this assembly into one of the fitting ports of the supplied assembly tool
(P/N160142), screwing the nut in two or three turns by hand.
c) Push the sleeve and the Nano column (capillary) all the way forward into the
fitting port that the sleeve and the capillary seats firmly.
Note: It is essential that the sleeve and the NANO column (capillary) are inserted
all the way forward into the union for a proper zero dead volume connection!
d) Manually turn the nut into the union until it is finger tight.
FIGURE D-2 Attaching a PEEK Sleeve Connector to a NANO Column
e) Carefully turn the nut 1/4 turn (90°) past the point where the ferrule starts
to grab the sleeve (FIGURE D-2).
Note: The amount of force to turn the nut can vary considerably due to the
friction between the nut and the threads and as well as the composition and wall
thickness of the tubing used. Because of these variables, we do not provide a
torque specification.
f) Remove the fitting and inspect it. When you pull gently at the NANO column
(capillary), you should not be able to move the column (capillary) in the
sleeve (e.g. it should be grabbed by the sleeve, FIGURE D-3). If the sleeve
moves laterally, reinstall the fitting into the fitting port and tighten it another
1/8 turn past finger tight.
FIGURE D-3 PEEK Sleeve Connector attached to a Nano Column
D-2

Fitting Assembly

D850R3
User's Manual Switchos II