Metrohm 872 Extension Module Sample Prep - Manual (Page 27)

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872 Extension Modul – Sample Prep ￭￭￭￭￭￭￭￭ 19
1 2
3
4 5
6
7
Figure 11 Switching valve – connectors
1 Connector 1 2 Connector 2
3 Connector 3 4 Connector 4
5 Connector 5 6 Connector 6
7 Switching valve
Valve positions
The injection valve (11-7) can adopt two valve positions - Fill and Inject.
Switching back and forth causes two respectively different connectors to
be connected with one another. The following graphic provides a sche-
matic display of the flow paths of the two valve positions.
Figure 12 Switching valve – valve positions
Filling In the Filling position, the connectors 2 and 3, 4
and 5, and 6 and 1 are connected with one
another.
Injecting In the Injecting position, the connectors 1 and
2, 3 and 4, and 5 and 6 are connected with one
another.
3.8.2 Connecting switching valve
Connecting switching valve
1 Connect capillaries with 6.2744.010 PEEK pressure screws.