NETZSCH LFA 447 Nanoflash Operating Instructions Manual page 17

TM
LFA 447
LIQUID STORAGE CONTAINERS
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General Information
− Liquid nitrogen is stored and transported either in purpose
built storage tanks or dewar flasks.
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.
− Unlike a liquid nitrogen tank, a vaccum-jacketed dewar flask is
essentially a non-pressurized container.
− Recommendations for handling and storage are as follows:
− 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.
regularly to ensure that they have not become sealed by frost
accumulating on the surface.
removed by warming gently with air.
− DO NOT USE SOURCES OF EXCESSIVE HEAT SUCH AS STEAM OR
OPEN FLAMES.
− Dewar flasks should be stored in well-ventilated areas where
they are protected against weather extremes, particularly heavy
rain.
Storage quantities vary
Check caps
Formation of frost may be
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