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WARNING ANY PNEUMATIC PLUG INFLATION SOURCE
MUST BE EQUIPPED WITH A PRESSURE REGULATED OUTPUT
MONITORED BY A PROPERLY CALIBRATED PRESSURE GAUGE! Lack
of such components may result in a condition of over-ination or under-
ination. Consult with a registered professional engineer for the proper
specication and design of such an ination source. NEVER attempt to
inate a pneumatic plug using a non-regulated high pressure source (eg.
Nitrogen tank, Scuba tank, non-regulated air compressor, etc). Catastrophic
plug failure may result! USE OF AN IMPROPER INFLATION SOURCE MAY
CAUSE PLUG FAILURE OR DISLODGEMENT WHICH MAY RESULT IN
DEATH, SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE!
CHECK THE INFLATION PRESSURE AT LEAST EVERY FOUR (4)
HOURS. A small volume of ination air over time may/will leak through
the elastomeric (rubber) body of every pneumatic plug. This lost air must
be replaced or under-ination may result allowing the plug and any media
restrained to dislodge from the pipe. A regulated pressure source may be
permanently attached to the plug’s ination inlet port as an alternative to
periodically checking and adjusting the ination pressure. Consult with a
registered professional engineer for the construction and maintenance of
such a pressure regulated ination source.
INFLATION PRESSURE VERSUS TEMPERATURE.
Any temperature
increase or decrease will cause a corresponding change in ination
pressure. Monitor and adjust plug ination pressure as necessary to
compensate for temperature changes. NOTE: Temperatures in pipelines
may vary widely from outside ambient temperatures. Monitor ination
pressure closely and adjust as necessary to maintain recommended
pressure.
INFLATION OF PLUGS WITH MEDIA OTHER THAN AIR.
Many Cherne
pneumatic plugs may also be inated with water or with inert gasses such
as nitrogen (as long as all pressure sources are regulated). Consult with a
registered professional engineer or call Cherne toll free at 1-800-843-7584
for recommendations (refer to following warnings).
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