Metrohm 872 Extension Module IC Pump - Manual (Page 54)

6.4 High pressure pump
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872 Extension Module IC Pump
1
2
Figure 30 Inserting the piston seal into the pump head
4 Replacing the piston cartridge
Screw the assembled piston cartridge back into the pump head and
tighten, first by hand, then additionally by approx. 15° with a
wrench.
Cleaning the inlet valve and outlet valve
1 Removing valves
￭ Unscrew the connection capillary for the auxiliary piston (20-1)
from the outlet valve holder.
￭ Unscrew the holders for the inlet and outlet valves and remove
valves.