Agilent Technologies 1200 Series Reference Manual page 205

range of 1 µl–10 ml/min. The inlet of the first plunger/chamber unit is
connected to the active inlet valve which is processor-controlled opened or
closed allowing solvent to be drawn into the first plunger pump unit.
The outlet of the first plunger/chamber unit is connected through the outlet
ball valve and the damping unit to the inlet of the second plunger/chamber
unit. The outlet of the purge valve assembly is then connected to the following
chromatographic system.
Chamber 1
From solvent
bottle
Plunger 1
Motor with encoder
Figure 45
1200 Series QP Reference Manual
Damper
Outlet
valve
Inlet
valve
Principle of the Quaternary Pump
Introduction to the Quaternary Pump
Purge valve
To mixing chamber
To waste
Ball screw drive
Chamber 2
Seal
Plunger 2
Gear
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