2.5.1 Installation recommendations for fittings
Two types of fittings are used within the system: PEEK (polymer-based) fittings and tubing and
SST (stainless steel) tubing and fittings. When connecting tubing, heed the following
recommendations for installing and tightening fittings.
Warning:
Observe Good Laboratory Practice (GLP) at all times, particularly when
working with hazardous materials. Consult the Material Safety Data Sheets regarding
the solvents you use. Additionally, consult the safety representative for your
organization regarding its protocols for handling such materials.
Warning:
To avoid personal contamination with biohazards, wear clean, chemical-
resistant, powder-free gloves when performing this procedure.
Requirement:
Wear clean, chemical-resistant, powder-free gloves when performing
this procedure.
Recommendations:
• To prevent band spreading, ensure that the tubing is fully bottomed in the fitting port before
tightening the compression screw.
• For easier accessibility, use long compression screws to attach tubes to the injector and vent
valve.
• Perform the solvent manager leak test whenever you replace or loosen fittings during
maintenance (see the console online Help).
• Whenever you loosen fittings during maintenance, examine for cracks, stripped threads, and
deformations.
• Do not reuse stainless steel fittings more than six times.
2.5.1.1 Assembling new fittings
For metallic (SST or MP35N) fitting assemblies with ferrules not previously assembled or set to
tubing, you must mark the compression screw and fitting body, and ensure that the two marks
line up when you tighten them.
Requirement:
Wear clean, chemical-resistant, powder-free gloves when performing
this procedure.
Required tools and materials
• 1/4-inch open-end wrench – For tightening or loosening stainless steel (gold-plated) fittings
with 2-piece ferrule.
• Permanent marker
• Chemical-resistant, powder-free gloves
August 8, 2016, 715005049 Rev. C
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