valco valves
138
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more information
Actuators
Air . . . . page 194-195
Microelectric . 188-191
Standard elec . . . 193
STF prices . . . . 130-131
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 . . . . . . page 52
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sample trappingwith
continuous flowto individual
outlets
The STF selector is a variation of
the ST flowpath, with the single
difference that the non-selected
streams are returned to their own
vents or sources rather than being
dead-ended or trapped as they are
in the standard ST configuration.
This is ideal for reactor processes
in which removal of substantial
amounts of sample would upset the
equilibrium within the reactor, or if
the stream is toxic or noxious and
must be isolated.
An STF selector on an air or electric
actuator along with a similarly
equipped 6 port valve comprise
a complete sampling system for
the automated analysis of up to
16 sampling points.
STF flowpath
Selector Applications
CHROMalytic TECHnology Pty Ltd AUSTRALIAN Distributors e-mail:
Tel: 03 9762 2034
