Metrohm 812 Valve Unit - Manual (Page 4)

1.1 Instrument description
812 Valve Unit
1
1 Introduction
1.1 Instrument description
The 812 Valve Unit is an instrument with one or two electrically driven
ein 6-port injector valves. Two different versions of the 812 Valve Unit
are available:
2.812.0010 Valve Unit with 1 valve
2.812.0020 Valve Unit with 2 valves
Valve parts in contact with the eluent are manufactured out of PEEK
material. The instrument is equipped with an external power supply so it
can be operated as a stand alone unit and is independent of other
Metrohm devices.
The 812 Valve Unit can be used for a variety of different applications:
• In combination with the 817 Bioscan or the 791 VA Detec-
tor, the 812 Valve Unit is used as the injector for the sys-
tems.
• With the 812 Valve Unit, a 761 Compact IC can be up-
graded to be a combined anion an cation system.
• In combination with the 816 Eluent Selector, the 2-port
version can be used for automatic column switching with
an intermediate rinsing step.
• The 812 Valve Unit can also be used in a large variety of
sample preparation techniques, like for cutting tech-
niques, or switching between different sample streams.