7 Maintaining the Packed Column Inlet
To Install Ferrules on a Packed Metal Column
118 Maintaining Your GC
To Install Ferrules on a Packed Metal Column
1 Gather the following:
• Wrenches
• Stainless steel male Swagelok fitting, 1/4- or 1/8-inch od
• Brass Swagelok nut and ferrule set. See “Consumables and Parts for the Packed
Column Inlet” on page 96.
• Lint-free gloves
2 Verify that the column end is cut square and is free of burns and deformation.
3 Secure the fitting in a bench vise.
Wear clean, lint-free gloves to prevent contamination of parts with dirt and skin oils.
4 Assemble a Swagelok nut and ferrules onto the column.
5 Fully insert the column into the vise-held fitting, then withdraw 1–2 mm. Finger-tighten the
nut.
6 Tighten the nut an additional 3/4 turn with a wrench (for a 1/8-inch column) or an
additional 1-1/4 turn (for a 1/4-inch column).
7 Unscrew the column nut from the vise-held fitting and remove the column. Ferrules should
now be set in place on the column with the column end correctly positioned.
Front ferrule
Back ferrule
Column nut
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