User manual

Bio-inert Quaternary Pump User Manual 119
Maintenance
9
Exchanging the Purge Valve Frit or the Purge Valve
Exchanging the Purge Valve Frit or the Purge Valve
When • Frit – when piston 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 water with purge valve opened)
• Purge valve – if internally leaking
Tools required p/n Description
8710-0510 Wrench open 1/4 — 5/16 inch
8710-1924 Wrench open 14 mm
Pair of tweezers
OR Toothpick
Parts required # p/n Description
1 01018-22707 PTFE frits (pack of 5)
1 G5611-60061 Purge Valve (Bio-inert)
1 5067-4728 Seal cap (OPTIONAL)
Preparations • Switch off pump at the main power switch
• Remove the front cover
• Use a solvent shutoff valve or lift up solvent filters in solvent reservoirs for avoiding leakages.