Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 81

Installing dual-threaded fittings
To install the dual-threaded fittings:
1. Loosen the stainless steel cap nut from the dual-threaded, finger-tight
fitting.
APH dual-threaded fitting with stainless steel cap nut:
Stainless steel
cap nut
2. Ensure the stainless steel tubing protrudes beyond the PEEK ferrule.
3. Apply the axial load towards the column hardware and insert the
stainless-steel tubing with the ferrule into the detail of the column
hardware.
4. Seat the ferrule by finger tightening the gold fitting into place.
Requirement:
seating the ferrule.
When making a new connection to a replacement column, replace
Tip:
the PEEK ferrule.
5. While holding the gold fitting, tighten the connection by rotating the
column hardware back onto the gold fitting.
6. If you are installing the column in a system with pressures exceeding
103,421 kPa (1034 bar, 15,000 psi), tighten the column an additional
1/2-turn.
7. Complete the connection by finger tightening the stainless-steel silver
cap nut onto the fitting.
Gold
fitting
Ferrule
Stainless steel tubing
Do not rotate the stainless-steel silver cap nut when
Preparing the column compartments 77