94 Agilent Intuvo 9000 GC Installation
A Making Swagelok Connections
Making Swagelok Connections
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
•
Procedure:
1 Place a Swagelok nut, back ferrule, and front ferrule to the 
tubing as shown in Figure 17.
Figure 17 Swagelok nuts and ferrules
2 Clamp a stainless steel plug or similar fitting in a bench vise.
Front ferrule
Back ferrule
Nut
Tubing
Important!
The narrow end of the 
back ferrule fits into 
the rear of the front 
ferrule.
Do not
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 
required to properly set the ferrules, and damage to an inlet or 
detector fitting is very costly to repair.