valco valves
|
Valco Instruments Co. Inc. Sales:
800–367–8424
Fax: 713–688–8106
|
135
tech tip
Because the most
common cause of
valve failure is stray
particulates entering
the valve, we strongly
recommend the use of
in-line filters at sample
entry points.
Our ZUFR filters feature
inexpensive and easily
replaceable low pressure
drop filter screens (2 or
10 micron). The filters
are available in 1/16",
1/8", and 1/4" standard,
reducing, and bulkhead
versions.
Filters . . . . . . pages 52
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stream selectionwith
continuous flowto a common
outlet
SC selectors are similar to the SD
configuration, except that instead of
being dead-ended the non-selected
streams flow to a common outlet.
They are also available in 4, 6, 8, 10,
12, or 16 position versions.
The SC configuration is ideal for air
quality monitoring, illustrated in
this example.
The application is essentially the
same as the one shown for the
SD selectors on the previous page,
except that the non-selected
streams are continuously pulled
through the valve, insuring that
the most current sample will be
provided as each point is selected
for analysis.
The sample loop
on the 6 port valve is loaded from
Stream 1.
The 6 port valve is
switched, injecting the sample.
Both valves can be automated
with air or electric actuators for
unattended operation.
SC flowpath
Selector Applications
more information
Actuators
Air . . . . . . page 194
Microelectric . 190-191
Standard elec . . .
193
SC prices. . . . 124-125
CHROMalytic TECHnology Pty Ltd AUSTRALIAN Distributors e-mail:
Tel: 03 9762 2034
