cheminertvalves
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145
Typesof CheminertValves
Injectorsand
SwitchingValves
Theapplications sectionbeginning
onpages168-169givesanoverview
of themany functionswhichcanbe
performedby twopositionvalves.
Since themost commonmethod
of sample injectionutilizesa6port
valvewithanexternal sample loop,
6port valvesareoften referred
toas“injectors”. However,as the
Applications section illustrates,6
port valves candomore than inject
sample,and8and10port valves can
be sample injectorsat the same time
they’realsoused forbackflushingor
column switching.
Onemorevariation is the4port
internal sample injector,which isused
when the sample sizemustbe smaller
than the smallest available loop. The
internal sample“loop”isactuallyan
engravedconnecting sloton the rotor,
sized tocontaina specifiedamountof
sample.
All thesevalves (exceptmanual
ModelsC1andC1CF) arecompatible
withallVICI actuationoptions,with
position feedbackavailable formanual
valves.
more information
Decoding
Cheminert valve
productno's . 264-265
Actuation
. . 186-209
Applications
. 168-169
Materials
Metals . . . . 254-255
Polymers . . . . . .256
Valve rotors . . . . 257
Valvedescriptions
Cheminert
injectors . . 146-149
selectors . . 150-151
nanovolume® . . 146
Diaphragm . . . . 140-141
Valco
injectors . . . . . 99
selectors . . 100-101
Cheminertvalve
prices
HPLC . . . . . 152-163
Lowpressure . 164-167
Nanovolume®
. . 152-155,170-171
Selectors . . . 170-177
OEM . . . . . 178-185
StreamSelectors
(MultipositionValves)
Selectorsmove incontinuous
revolutionsby incremental steps,
unlike thebackand forth switchingof
twopositionvalves. Each step selects
oneof 4 to26 streams,directing it
through thevalveoutlet toa sample
valve,pressure sensor,detector,
column,etc. The samevalvecanalso
directone stream toanumberof
outlets for fractioncollection.
In the standardmodels, thenon-
selected streamsaredead-ended.
However,somevalves canbeordered
withanoptional rotor that returns
each stream to its source. Consult the
factory formore information.
CHROMalyticTECHnologyPtyLtdAUSTRALIANDistributors e-mail:
: 039762 2034
