12 Agilent 1290 Infinity Binary Pump User Manual
1 Introduction
Pump Principle
Pump Principle
The Binary Pump is based on a two-channel, dual-piston in-series design
which comprises all essential functions that a solvent delivery system has to
fulfill. Metering of solvent and delivery to the high-pressure side are
performed by two pump assemblies which can generate pressure up to
1200 bar.
Each channel comprises a pump assembly including independent pump drive
for each piston, pump head, inlet valve, outlet valve, solvent heat exchanger
and an outlet filter. The two channels are fed into a low-volume mixing groove
in an automatic purge valve and a Jet Weaver mixer, with 35 or 100 µl volume
can be added downstream for optimum mixing performance.
A system pressure sensor, for monitoring the pump pressure, is attached to
the purge valve, normally connected in the B-channel of the pump, before the
mixing groove, in order to minimize delay volumes.
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