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Chapter 3
Before You Begin...
How to Use Swagelok Tube Fittings
The Swagelok fitting consists of four components: a Swagelok nut, a back ferrule,
a front ferrule, and an inlet body. It becomes a five-piece connection when affixed
to the tubing. The two ferrules merge when the nut is tightened, forming a safe
and leak-free seal between the tubing and body.
Use the following procedure to connect tubing using Swagelok fittings:
1. Place a Swagelok nut over the end of the tubing.
2. Place a back ferrule over the end of the tubing.
3. Place a front ferrule over the end of the tubing. If you are using tubing smaller
4. Push the Swagelok nut over the ferrules.
5. Insert the tubing into the inlet body as far as it will go. If you are using tubing
50
than 1/8-in., make sure the tubing extends only 5 mm past the front ferrule.
This will prevent damage to the fritted filter inside the inlet manifold.
Figure 3-1 shows the proper assembly order.
Tubing
Figure 3-1. Swagelok Ferrule and Nut Assembly
smaller than 1/8-in, make sure the tubing extends only 5 mm past the front
ferrule when you insert it into the inlet body.
Swagelok
Front
nut
ferrule
Back
ferrule
Gas Plumbing Basics
Inlet
body
Site Preparation and Installation Manual
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