Metrohm 709 IC Pump - Manual (Page 17)

2.3 Attaching the accessories
709 IC Pump
9
2.3 Attaching the accessories
2.3.1 Capillaries
Some of the connections under high pressure between the 709 IC
Pump and the IC system must be set up by the user. For the pressure
range 0 … 25 MPa (0 … 250 bar) the 6.1831.010 PEEK capillary
(i.d. = 0.25 mm, e.d. = 1 /
16
" , length = 3 m) supplied in the accessories
of the 709 IC Pump can be used for both pump versions. For the pres-
sure range 25 … 50 MPa (250 … 500 bar), which is permissible only for
the not metal-free 2.709.0010 version, the 6.2620.020 Steel capillary
(i.d. = 0.25 mm, e.d. = 1 /
16
" , length = 3 m) must be used.
With PEEK capillaries the connection is made preferably with the
6.2744.010 PEEK connectors (see section 2.3.2), with steel capillaries,
the 6.2620.000 and 6.2620.010 steel connectors should be used (see
section 2.3.3).
Capillaries fitted with new connectors must have a perfectly flat cut
surface. For PEEK capillaries it is best to use the 6.2621.080 Capil-
lary tubing cutter, for steel capillaries the 6.2621.040 Capillary
tubing cutter.
41 Ferrule (6.2620.010)
42 Pressure screw (6.2620.000)
43 Capillary
6.2620.020 Steel capillary or
6.1831.010 PEEK capillary
44 Compression fitting
(6.2744.010)
2.3.2 PEEK connectors
For the connection of 6.1831.010 PEEK capillaries or of 6.1822.010
PTFE Microcapillaries (i.d. = 0.3 mm), the supplied 6.2744.010 PEEK
Compression fittings are used. It is best to proceed as follows:
1 Mount compression fitting
Slide a compression fitting 44 (6.2744.010) over the end of the
capillary 43 to be fastened as shown in Fig. 3.
42 41 43 44
Fig. 3: Connectors for capillaries