Appeal No. 96-3395 Page 2
Application No. 08/347,900
BACKGROUND
The invention at issue in this appeal obtains bottled
samples from a flow stream. It employs a three-way main valve
having two positions. One position connects flow from a
process plant to a collection bottle. The other position
blocks the process flow while connecting the flow of purge gas
to the system. A purge control valve switches the flow of
purge gas off and on.
The invention operates in four steps. The first step
sets the main valve and opens the purge valve to enable purge
gas to purge the bottle and the pathways through the main
valve. The second step sets the main valve to interrupt the
flow of purge gas while permitting flow from the plant to fill
the bottle with sample material. Any surplus overflows
through a filter. The third step restores the main valve to
its initial position, which blocks flow from the plant while
permitting flow of the purge gas. This purges the bottle and
the pathways through the main valve. The fourth step closes
the purge valve to switch-off the flow of purge gas.
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Last modified: November 3, 2007