1200 Series Quarternary Pump User Manual 85
Maintenance
7
Simple Repairs
Exchanging the Purge Valve Frit or the Purge Valve
1 Using a 1/4 inch wrench disconnect the pump outlet capillary at the purge
valve.
2 Disconnect the waste tube. Beware of leaking solvents due to hydrostatic
pressure.
3 Using the 14 mm wrench unscrew the purge valve and remove it.
4 Remove the plastic cap with the gold seal from the purge valve.
When Frit – when plunger seals are exchanged or when contaminated or blocked (pressure drop of
> 10 bar across the frit at a flow rate of 5 ml/min of H
2
0 with purge valve opened)
Purge valve – if internally leaking
Tools required • Wrench 1/4 inch
• Wrench 14 mm
• Pair of tweezers or toothpick
Parts required # Part number Description
5 01018-22707 PTFE frit (pack of 5)
1 G1311-60009 Purge valve
Preparations • Switch off pump at the main power switch
• Remove the front cover
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