Metrohm 761 SD Compact IC - Manual (Page 105)

6.2 Maintenance and servicing
761 SD Compact IC / Instructions for Use 8. 761.1043
97
Figure 17: Components of inlet valve 77 and outlet valve 78
The rear side of the pump is provided with differing bore depths for
the securing pins, i.e. one securing pin is longer than all the others, so
as to prevent the pump head being positioned the wrong way round.
Consequently, the deepest bore must be assigned to the longest pin.
If this is not the case, the pump will not function correctly.
82 Valve housing
83 Sealing ring (black)
84 Sleeve
85 Sapphire sleeve
The bright side must point towards the
sapphire sphere
86 Sapphire sphere
87 Ceramic holder for sapphire
sphere
88 Seal
The larger opening must point out-
wards.
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