A Making Swagelok Connections; Making Swagelok Connections - Agilent Technologies 7697A Installation And Startup Manual

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Making Swagelok Connections

Making Swagelok Connections
C A U T I O N
70
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 25 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 (see
Figure 26).
Make sure that the front ferrule is touching the plug.
4
Slide the Swagelok nut over the ferrule and thread it onto
the plug.
Figure 25.
Important!
The narrow end of the
back ferrule fits into
the rear of the front
ferrule.
Installation and First Startup