1 Overview
DEWAR PRECAUTIONS
Always handle glass dewars with care. Any product incorporating a vacuum is a poten-
tial safety hazard and should be treated with caution. If in doubt, contact your safety
officer.
When handling dewars containing liquefied gases or cryogenic liquids:
l Wear protective equipment:
o
goggles or face shield
o
an insulated or rubber apron
o
insulated gloves
l When pouring liquefied gases from one container to another:
o
cool the receiving container gradually to minimize thermal shock
o
pour the liquified gas slowly to prevent splashing
o
vent the receiving container to the atmosphere
FOR GLASS DEWARS
l Use a plastic stirring rod when stirring substances in a dewar containing liquefied gases (or other
materials of extremely low temperature). Do not use a glass or metal stirring rod unless it has a
protective coating.
l Do not handle heavy objects above the dewar. If unavoidable, place a protective cover over the
dewar opening. If an object of sufficient weight is accidentally dropped into the dewar, shattering
may occur.
l If the dewar has a protective mesh covering, do not remove it. This cover minimizes the risk of fly-
ing particles should the dewar be knocked over, dropped, or broken.
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TriStar II 3020 Confirm Installation Instructions and Checklist
302-42870-04 (Rev A) — Sep 2017
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