Instruction Manual
K SERIES Cryostorage System
IM: CryoCeK
Revision: 02
Approved by: CB
Page
25
of
87
IMPORTANT
The following safety precautions apply to the Worthington Industries K SERIES
Cryostorage System
(continued)
:
Once this pressure relief device has opened and cooled to liquid nitrogen temperature,
it will not reseat until it has warmed to near ambient temperature.
THIS COULD PERMIT THE ENTIRE CONTENTS OF THE LIQUID NITROGEN
SUPPLY SYSTEM TO BE DISCHARGED RAPIDLY INTO THE IMMEDIATE AREA OF
THE REFRIGERATOR.
This could result in damage to equipment and/or sufficient depletion of
oxygen in the atmosphere to cause dizziness, unconsciousness, or death.
If the fill fails to stop for any reason quickly close the liquid supply valve to
prevent overfilling until the cause of the problem can be determined.
Liquid phase or vapor phase storage
:
Prior to the initial fill of your K SERIES Cryostorage System, you should determine
whether the liquid phase or the vapor phase cryostorage will be utilized
.
6.3 NORMAL FILL CYCLE
The cooling effect required for the cryogenic storage of the samples is maintained by continuous
evaporation of the liquid nitrogen. The necessary evaporation heat is removed from the environment
by heat transfer. Over a certain evaporation period time the liquid nitrogen level in your K SERIES
Cryostorage System drops permanently:
Figure 7
Fill cycle and evaporation period time
