Making Swagelok Connections - Agilent Technologies Agilent 7890 Series Maintenance Manual

20
Swagelok Connections

Making Swagelok Connections

C A U T I O N
350
Objective
To make a tubing connection that does not leak and that can
be taken apart without damaging the fitting
Materials needed:
• 1/8- inch (or 1/4- inch, if used) preconditioned copper
tubing
• 1/8- inch (or 1/4- inch, if used) Swagelok nuts
• Front and back ferrules
• Two 7/16- inch (for 1/8- inch nuts) or 9/16- inch (for
1/4- inch nuts) wrenches
1 Place a Swagelok nut, back ferrule, and front ferrule to
the tubing as shown in
Front ferrule
Back ferrule
Nut
Tubing
Figure 9 Swagelok nuts and ferrules
Clamp a stainless steel plug or similar fitting in a bench
2
vise.
Use a separate stainless steel fitting in a vise for initial tightening of
the nut. Do not use an inlet or detector fitting. Strong forces are
Do not
required to properly set the ferrules, and damage to an inlet or
detector fitting is very costly to repair.
3 Push the tubing into the stainless steel plug
4 Make sure that the front ferrule is touching the plug.
Slide the Swagelok nut over the ferrule and thread it onto
the plug.
Figure 9.
IMPORTANT!
The narrow end of the back
ferrule fits into the rear of
the front ferrule.
Maintaining Your GC
(Figure 10).