A Making Swagelok Connections
54 Installation and First Startup
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 on the tubing as shown in Figure 14.
Figure 14. Swagelok nuts and ferrules
2 Push the tubing into the stainless steel fitting.
3 Make sure that the front ferrule is fully engaged. Slide the Swagelok nut over the ferrule and
thread it onto the plug.
4 Push the tube fully into the plug, then withdraw it approximately 1 to 2 mm. See Figure 15.
Front ferrule
Back ferrule
Nut
Tubing
Important!
The narrow end of the
back ferrule fits into
the rear of the front
ferrule.
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