1200 Series Quarternary Pump User Manual 79
Maintenance
7
Simple Repairs
Exchanging the Active Inlet Valve
1 Remove the front cover.
2 Unplug the active inlet valve cable from the connector.
3 Disconnect the solvent inlet tube at the inlet valve (be aware that solvent
may leak out of the tube due to hydrostatic flow).
4 Unscrew the adapter from the active inlet valve.
5 Using a 14 mm wrench loosen the active inlet valve and remove the valve
from pump head.
Figure 13 Active Inlet Valve Assembly
6 Insert the new valve into the pump head. Using the 14 mm wrench turn the
nut until it is hand tight.
When If internally leaking (backflow)
Tools required • Wrench 14 mm
• Pair of Tweezers
Parts required # Part number Description
1 G1312-60025 Active inlet valve body
1 5062-8562 Valve cartridge (400 bar)
Preparations Switch off pump at the main power switch and unplug the power cable
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