Waters ACQUITY UPLC M-Class System Manual page 33

2.6.1.3 ZenFit connection technology
See also:
ionKey Tubing Upgrade Kit with ZenFit Connection Technology for more information.
First use or re-installed
Knob
Screw
Tip
White safe tightening zone reference area
To tighten the fitting:
1. Thread the fitting into the port until the tip contacts the bottom of the port.
2. Tighten the fitting between 30 and 45 degrees (90 degrees max).
Note:
Re-installed fittings require a smaller tightening angle. Each reuse requires the
same amount of torque.
Requirement:
detail port, you must replace the valve. (The valve is most likely damaged because too
much torque was applied to the fitting, causing a burr to form inside the port.)
Tips:
• Before installing ZenFit tubing use the port gauge to verify port compatibility with the
valves (see
• Remove the knob from the screw and re-orient it, aligning the slot in the knob to a
convenient reference position, such as the 6 o'clock position.
• If the space around the fitting is limited, you can remove the knob after tightening the
fitting.
Notice:
3. Using the first edge of the slot in the knob as the zero point, turn the knob 45 degrees so
the first edge of the white safe tightening zone is at the position that the edge of the slot
If the tip separates from the fitting when you remove the fitting from a V-
Testing the port with the port
To avoid damaging the fitting, do not tighten it more than 90 degrees.
November 26, 2019, 715003588 Revision C
Page 33
gauge). Failed ports require a new valve.