CHART Cryo-Cyl80HP, Product Manual

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7 Product Manual - Liquid Cylinders
General
The Dura-Cyl
®
and Cryo-Cyl
®
Liquid Cylinders are double
walled, vacuum and multi-layer insulated cylinders designed
for the transportation and storage of liquefied gases. All of
the Dura-Cyl series and Cryo-Cyl 80 HP cylinders can be
used for liquid argon, liquid nitrogen, and liquid oxygen. The
Dura-Cyl HP series and the Cryo-Cyl 80 HP cylinders can
also be used for transporting liquid carbon dioxide (CO
2
) or
liquid nitrous oxide (N
2
O).
Dura-Cyl series liquid cylinders have model distinctions
for low pressure liquid and gas withdrawal cylinders (LP),
medium pressure liquid and gas withdrawal cylinders (MP),
and high pressure liquid and gas withdrawal (HP). Cryo-
Cyl liquid cylinders are only offered in 80 HP The various
cylinder models also have capacity distinctions; the number
after their name that designates net capacity in liters (i.e.
Dura-Cyl 180 indicates 180 liter capacity).
Cylinder Design
The Dura-Cyl/Cryo-Cyl liquid cylinders are designed,
manufactured and tested to the requirements of US DOT 4L
and Transport Canada specifications. They are specifically
authorized by the US Department of Transportation for
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. They are authorized by Transport Canada
for the transporting of carbon dioxide and nitrous oxide with
an exemption.
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 1 shows the major components
of the Dura-Cyl/Cryo-Cyl 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 pump-out, based on the requirement of CGA 5-1.1-2003.
The pump-out also functions as the vacuum port.
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
Figure 1
Each liquid cylinder is equipped with a stainless steel ring to
protect the plumbing components. The ring on the Cryo-
Cyl cylinder is connected to the cylinder with two handling
posts; the Dura-Cyl cylinders use four handling posts. The
posts have slots for ease in handling with a hand truck or an
overhead hoist
The Dura-Cyl/Cryo-Cyl 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 the units enable the
user, through the use of the vent, liquid, pressure building
and pressure relief devices, to completely control the liquid
cylinder's operation.
To protect the inner pressure vessel from over pressurization,
the units include a safety pressure relief valve. The liquid
cylinders are further protected from over pressurization by
a bursting disc that acts as a secondary relief device These
devices meet the requirements of CGA Pamphlet S-1.1
"Pressure Relief Device Standard - Part 1 - Cylinders for
Compressed Gases."
A back control regulator is used to build and maintain
operator pressure while assuring a no-loss operation under
normal usage during gas withdrawal service The no loss
Introduction
Handling
Ring
Neck
Tube
Outer
Shell
Bottom
Support
Footring
LCCM
Load
Ring
Vacuum &
Insulation
Inner
Vessel
Vaporizer