Figure 4, Connection of capillaries with pressure screws – Metrohm 881 Compact IC pro – Cation User Manual
Page 23
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3 Installation
881 Compact IC pro – Cation
￭￭￭￭￭￭￭￭
15
Pressure screws
4
1
2
3
Figure 4
Connection of capillaries with pressure screws
1
PEEK pressure screw (6.2744.014)
Use on the injection valve.
2
Connection capillary
3
PEEK pressure screw, short
(6.2744.070)
For use on the high pressure pump, the
purge valve, the inline filter, the pulsation
absorber, the guard column and the separa-
tion column.
4
PEEK pressure screw, long
(6.2744.090)
Use on special components. Is not used on
all instruments.
Note
In order to keep the dead volume as low as possible, capillary connec-
tions should generally be as short as possible.
Note
For an improved overview, capillary and tubing connections can be
bundled with the 6.1815.010 spiral band.
Connection capillaries
PEEK capillaries and PTFE capillaries are used in the IC system.
PEEK capillaries (poly-
etheretherketone)
PEEK capillaries are temperature-resistant up to 100°C, stable under pres-
sure up to 400 bar, flexible, chemically inert and exhibit an extremely
smooth surface. They can be readily cut down to the desired length with
the 6.2621.080 capillary cutter.
Usage:
￭
PEEK capillaries (6.1831.010) with an internal diameter of 0.25 mm for
the entire high pressure range.