1-2
180 liter LN2 Supply Tank
Thermo Scientific
Section 1
Introduction
Cylinder Design
The Cryo-Cyl Series liquid cylinders are designed, manufactured, and
tested to the requirements of the U.S. DOT and Transport Canada 4L
specification. They are specifically authorized by the U.S. Department of
Transportation for the transporting of liquid nitrogen, oxygen, argon,
carbon dioxide, and nitrous oxide. They are specifically authorized by
Transport Canada for the transporting of liquid nitrogen, oxygen, and
argon.
The inner pressure vessel is
constructed of stainless steel
and supported within an
outer stainless steel vacuum
jacket. The support system is
an all stainless steel internal
support, designed for low
heat leak and high strength.
The illustration in Figure B
shows the major components
of the Cryo-Cyl Series liquid
cylinders.
The space between the inner
and outer vessel makes up
the insulation system.
Multiple-layer insulation and
high vacuum assures long
holding time. The insulation
system is designed for long
term vacuum retention and is
permanently sealed at the
factory. The vacuum space is
protected from over
pressurization by the use of a reverse buckling rupture disc.
The outer vacuum jacket of the liquid cylinder contains an internal
vaporizer which converts the cold liquid to gas. The internal pressure
building system allows for immediate use of the cylinder by automatically
building pressure to the preset operating pressure and maintaining it there
during gas withdrawal.
Each liquid cylinder is equipped with a stainless steel ring to protect the
plumbing components. The ring on the Cryo-Cyl is connected to the
cylinder with two handling post. The post has slots for ease in handling
with a hand truck or an overhead hoist.
The Cryo-Cyl Series cryogenic liquid cylinders are constructed with all
operating controls situated at the top of the cylinder for ease in gas
withdrawal and liquid dispensing operations. In a stand-alone operating
environment it enables the user, through use of the vent, liquid, and
pressure relief devices, to completely control the liquid cylinder's
operation.
Protection
Ring
Handling
Slot
Handling
Post
Reverse
Buckling
Rupture Disc
Outer
Vacuum
Jacket
Liquid Level
Gauge
Safety Relief
Devices
Plumbing
Controls
Multi-
layered
Insulation
Inner
Pressure
Vessel
Vacuum
Space
Foot
Ring
Figure B.
Cylinder Components
