Metrohm 850 Professional IC Cation - Gradient - Manual (Page 70)

5.5 High pressure pump
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
62 ￭￭￭￭￭￭￭￭
850 Professional IC Cation – HP-Gradient
1
2
Figure 31 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 (17-1)
from the outlet valve holder.
￭ Unscrew the holders for the inlet and outlet valves and remove
valves.