3.3.5 System pump
Introduction
This section describes the basic ÄKTAprocess system pump. In the standard configuration,
a single system pump is provided that supports isocratic operation.
Pump type
The system pump is a triple head diaphragm pump, or a 5-headed diaphragm pump for
flow rates 45 to 2000 l/h. The process wetted parts of the pump heads are effectively
sealed from non-sanitary components of the pump.
The pump is provided with stroke length adjustment knobs. These are factory preset at
delivery and must not be adjusted by the user.
Pump stroke frequency
The pump stroke frequency is controlled by the flow that is set in the UNICORN control
software.
Safety monitoring
The system is protected from exceeding the high pressure limit by the electronic module
ALP-900, an air, level and pressure monitoring system that is situated inside the cabinet.
The ALP-900 monitors:
1
The pressure in each pressure sensor
2
The pressure difference between each pressure sensor
3
The temperature in the process liquid
If any of the monitored parameters reaches a critical limit, the ALP-900 will shut down
the pumps independently from the UNICORN control system.
ÄKTAprocess Operating Instructions 29-0252-49 AA 59
3 System description
3.3 Standard components
3.3.5 System pump
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