NETZSCH LFA 447 Nanoflash, Руководство по эксплуатации

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General Information
LFA 447
TM
01/09 J:\LFA447\CHAPTER1.DOC
15
LIQUID STORAGE CONTAINERS
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Liquid nitrogen is stored and transported either in purpose
built storage tanks or dewar flasks. Storage quantities vary
from a few liters for dewar flasks to several thousands of liters
for storage tanks. The storage tanks are pressurized, insulated
containers which are installed in accordance with established
codes of practice. All liquid storage areas should be kept clean
and free of flammable materials.
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Unlike a liquid nitrogen tank, a vaccum-jacketed dewar flask is
essentially a non-pressurized container.
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Recommendations for handling and storage are as follows:
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The protective caps on dewar flask fill/ drain outlets should be
kept closed when not in use to prevent contamination and
ensure that blockage by frost does not occur. Check caps
regularly to ensure that they have not become sealed by frost
accumulating on the surface. Formation of frost may be
removed by warming gently with air.
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DO NOT USE SOURCES OF EXCESSIVE HEAT SUCH AS STEAM OR
OPEN FLAMES.
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Dewar flasks should be stored in well-ventilated areas where
they are protected against weather extremes, particularly heavy
rain.