Agilent Technologies 1220 Infinity II LC User Manual

246 1220 Infinity II LC System User Manual
11 Maintenance and Repair
Solvent Delivery System
Solvent Delivery System
Introduction
The Agilent 1220 Infinity II LC pump is designed for easy repair. The
procedures described in this section can be done with the pump in place in the
rack.
The most frequent repairs, such as exchanging the plunger seals or purge valve
seal, can be done from the front of the pump.
Table 44 Simple repair procedures - overview
Procedure Typical frequency Notes
Checking and cleaning the
solvent filter
If solvent filter is blocked Gradient performance
problems, intermittent
pressure fluctuations
Exchanging the Passive Inlet
Valve
If internally leaking Pressure ripple unstable, run
Leak Test for verification
Exchanging the Outlet Ball
Valve
If internally leaking Pressure ripple unstable, run
Leak Test for verification
Exchanging the Purge Valve
Frit or the Purge Valve
If internally leaking Solvent dripping out of waste
outlet when valve closed
Exchanging the Purge Valve
Frit or the Purge Valve
If the frit shows indication of
contamination or blockage
A pressure drop of
> 10 bar across the frit
(5 mL/min H
2
O with purge
open) indicates blockage
Exchanging the Pump Seals If pump performance indicates
seal wear
Leaks at lower pump head
side, unstable retention times,
pressure ripple
unstable — run Leak Test for
verification
Seal Wear-in Procedure After exchanging the pump
seals

Agilent Technologies 1220 Infinity II LC Specifications

General

Brand	Agilent Technologies
Model	1220 Infinity II LC
Category	Laboratory Equipment
Language	English