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2.3 Swagelok Tube Fitting Instructions
These instructions apply to
one inch (25 mm) and smaller fittings
.
2.3.1 Installation
1)
Fully insert the tube into the fitting until it bumps against the shoulder.
Figure 2 - Tube Insertion
2)
Rotate the nut until it is finger-tight. (For high-pressure applications as well as high-
safety-factor systems, further tighten the nut until the tube will not turn by hand or
move axially in the fitting.)
3)
Mark the nut at the six o’clock position.
Figure 3 - Make a Mark at Six O’clock
4)
While holding the fitting body steady, tighten the nut one and one-quarter turns until
the mark is at the 9 o’clock position. (Note: For 1/16”, 1/8”, 3/16”, and 2, 3, and 4
mm fittings, tighten the nut three-quarters of a turn until the mark is at the 3 o’clock
position.)
Figure 4 - Tighten One and One-Quarter Turns
