Solvent Delivery System; Introduction - Agilent Technologies 1220 Infinity II LC 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
Procedure
Checking and cleaning the
solvent filter
Exchanging the Passive Inlet
Valve
Exchanging the Outlet Ball
Valve
Exchanging the Purge Valve
Frit or the Purge Valve
Exchanging the Purge Valve
Frit or the Purge Valve
Exchanging the Pump Seals
Seal Wear-in Procedure
246
Simple repair procedures - overview
Typical frequency
If solvent filter is blocked
If internally leaking
If internally leaking
If internally leaking
If the frit shows indication of
contamination or blockage
If pump performance indicates
seal wear
After exchanging the pump
seals
Notes
Gradient performance
problems, intermittent
pressure fluctuations
Pressure ripple unstable, run
Leak Test for verification
Pressure ripple unstable, run
Leak Test for verification
Solvent dripping out of waste
outlet when valve closed
A pressure drop of
> 10 bar across the frit
(5 mL/min H
2
open) indicates blockage
Leaks at lower pump head
side, unstable retention times,
pressure ripple
unstable — run Leak Test for
verification
1220 Infinity II LC System User Manual
O with purge