GE AKTApure, User Manual, Page: 75 / 522

2.4.15 Flow restrictor
Function of Flow restrictor FR-902
The Flow restrictor is included in the flow path to generate a steady back pressure of approximately
0.2 MPa, to prevent formation of air bubbles in the UV flow cell.
Do not remove the flow restrictor to lower the pressure in the system. There is a risk that air
bubbles cause large disturbances in the UV flow cell. Use the automatic pressure control
function to avoid pressure alarms, see Recommended pressure control parameters, on page 502
Note:
Location and illustration of Flow restrictor FR-902
The Flow restrictor is normally included in the flow path after the Conductivity monitor. The Conductiv-
ity monitor is equipped with a special holder for the Flow restrictor.
The illustration below shows Flow restrictor FR-902 fitted on the Conductivity monitor.
1
4 3
2
Function Part
Flow restrictor 1
Holder 2
Inlet 3
Outlet 4
If ÄKTA pure is fitted with pH valve V9-pH or V9H-pH the Flow restrictor has to be moved from the
Conductivity monitor to the pH valve.
ÄKTA pure User Manual 29119969 AB 75
2 The ÄKTA pure instrument
2.4 Instrument modules
2.4.15 Flow restrictor