Description - Agilent Technologies 1200 Series Reference Manual

4 Theory of Operation

Description

See also the Rheodyne 7725i operating instructions supplied with the injection valve.
N O T E
The Agilent 1100 Series manual injector uses a Rheodyne 7725i 7-port sample
injection valve. Sample is loaded into the external 20-µl sample loop through
the injection port at the front of the valve. The valve has a ceramic stator and
Vespel™ injection seal (for pH above 10, a Tefzel™ seal is available). A
make-before-break passage in the stator ensures flow is not interrupted when
the valve is switched between the INJECT and LOAD positions, and back again
(see also
The valve is mounted on a steel mounting pole, and can be installed at the left-
or right-hand side of the LC system.
Injection port
Figure 11
36
"Needles" on page 17 and
Rheodyne 7725i Injection Valve
"Flow Connections"
Mounting pole
1200 Series MI Reference Manual
on page 14).