valcovalves
|
Valco InstrumentsCo. Inc. Sales:
800–367–8424
Fax: 713–688–8106
|
135
techtip
Because themost
commoncauseof
valve failure is stray
particulatesentering
thevalve,we strongly
recommend theuseof
in-linefiltersat sample
entrypoints.
OurZUFRfilters feature
inexpensiveandeasily
replaceable lowpressure
dropfilter screens (2or
10micron). Thefilters
areavailable in1/16",
1/8",and1/4" standard,
reducing,andbulkhead
versions.
Filters . . . . . . pages52
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streamselectionwith
continuousflowtoacommon
outlet
SC selectorsare similar to theSD
configuration,except that insteadof
beingdead-ended thenon-selected
streamsflow toacommonoutlet.
Theyarealsoavailable in4,6,8,10,
12,or 16positionversions.
TheSCconfiguration is ideal for air
qualitymonitoring, illustrated in
thisexample.
Theapplication isessentially the
sameas theone shown for the
SD selectorson thepreviouspage,
except that thenon-selected
streamsarecontinuouslypulled
through thevalve, insuring that
themost current samplewill be
providedaseachpoint is selected
for analysis.
The sample loop
on the6port valve is loaded from
Stream1.
The6port valve is
switched, injecting the sample.
Bothvalves canbeautomated
withairor electricactuators for
unattendedoperation.
SCflowpath
SelectorApplications
more information
Actuators
Air . . . . . . page194
Microelectric . 190-191
Standardelec . . .
193
SCprices. . . . 124-125
CHROMalyticTECHnologyPtyLtdAUSTRALIANDistributors e-mail:
: 039762 2034
