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Exchange 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 in low delay volume configuration and > 20 bar in standard configuration across the frit at a flow rate of 5 mL/min of water with purge valve opened)
Purge valve – if internally leaking

Tools required

Qty.		p/n	Description
1		8710-0510	Open-end wrench 1/4-5/16 inch
1		8710-1924	Open-end wrench 14 mm
1			Pair of tweezers , OR
1			Toothpick

Parts required

Qty.		p/n	Description
1		01018-22707	PTFE Frit (5/Pk)
1		G7111-60061	Purge valve
1		5067-4728	Seal cap assembly

Prerequisites

Switch off pump at the on/off switch
Open the doors
Use an optional solvent shutoff valve or lift up solvent filters in solvent reservoirs for avoiding leakages

Using a pair of tweezers or a toothpick remove the frit.
Reinstall the seal cap including the gold seal.

NOTE
Before reinstallation always check the gold seal in the seal cap. A deformed seal cap should be exchanged.
Run the System Pressure Test (see System Pressure Test).

21-Jun-2025