Taylor-Wharton XL-65HP User Manual
Instructions for
XL-65 and XL-65HP
with Dual Regulator
TW-289
Do not attempt to use or maintain this
unit until you read and understand these
instructions. Do not permit untrained
persons to use or maintain this unit. If
you do not fully understand these
instructions, contact your supplier for
further information.
CONTAINER
SAFETY
NOTE:
For detailed
information on the
handling of cryogenic
liquids, refer to the
Compressed gas
Association
publication: P-12
“Safe Handling of
Cryogenic Liquids”
available from the
Compressed Gas
Association, Inc., 1235
Jefferson Davis
Highway , Arlington,
V A 22202
Pressure Hazard – The containers covered by this literature may contain pressures up to
350 psig (24 bar/2412 kPa). Sudden release of this pressure may cause personal injury
by issuing cold gas or liquid, or by expelling parts during servicing. Do not attempt any
repairs on these containers until all pressure is released, and the contents have been
allowed to vaporize to ensure no pressure buildup can occur.
Extreme Cold-Cover Eyes and Exposed Skin – Accidental contact of the skin or eyes
with any cryogenic liquid or cold issuing gas may cause a freezing injury similar to frostbite. Protect your eyes and over your skin when handling the container or transferring
liquid, or in any instance where the possibility of contact with liquid, cold popes and cold
gas may exist. Safety goggles or a face shield should be worn when withdrawing liquid or
gas. Long-sleeved clothing and gloves that can be easily removed are recommended for
skin protection. Cryogenic liquids are extremely cold and will be at temperatures below 300°F (-184°C) under normal atmospheric pressure.
Keep Equipment Well V entilated – Although some of the gases used in these containers are non-toxic and non-flammable, they can cause asphyxiation in a confined area
without adequate ventilation. An atmosphere that does not contain enough oxygen for
breathing will cause dizziness, unconsciousness, or even death. These gasses cannot
be detected by the human senses and will be inhaled normally as if they were air. Ensure
there is adequate ventilation where these gasses are used and store liquid containers
outdoors or only in well ventilated are.
Replacement Parts Must be “Cleaned for Oxygen Service” – Some materials, especially non-metallic gaskets and seals, can be a combustion hazard if used in oxygen or
nitrous oxide service, although they may be acceptable for use with other cryogenic liquids. Use only Taylor-Wharton recommended sp are parts, and be cert ain parts used on
oxygen or nitrous oxide equipment marked “cleaned for oxygen service”. For information
on cleaning, consult the Compressed Gas Association (CGA) p amphlet G-4.1, “Cleaning
for Oxygen Service” or equivalent industrial cleaning specifications.
GENERAL
INFORMA TION
Install Relief Valves in Cryogenic Liquid Lines - When installing piping of fill hose
assemblies, make certain a suitable safety relief valve is installed in each section of
plumbing between shut-off valves. Trapped liquefied gas will expand as it warms and may
burst hoses or piping causing damage or personal injury .
The XL-65 and XL-65HP are vacuum-insulated, stainless steel containers designed to
store and transport cryogenic liquid oxygen, nitrogen, argon, carbon dioxide, and nitrous
oxide. Built to DOT 4L standards, these containers may be used for over the road transportation of cryogenic fluids, as well as on-site storage and supply in a wide range of
applications.
As rugged, long holding time, self-contained gas supply systems, these cylinders are
capable of providing continuous flow rates of up to 150 cfh (3.9 cu.m/h) in carbon dioxide
service, up to 1 10 cfh (2.9 cu.m/h) in nitrous oxide service for the XL-65HP; up to 350 cfh
(9.2 cu.m/h) in either Oxygen/Nitrogen/Argon gas services for both cylinders. The XL-65
and XL-65HP are designed to hold liquid with a relief valve setting of 350 psig (24 bar/2413
kPa) for the XL-65HP and 230 psig (16 bar/158 kPa) for the XL-65 kPa) for the XL-65.
SPECIFICATIONS
XL-65 XL-65HP
Dimensions
Diameter 26 in. (660 mm) 26 in. (660 mm)
Height* 59 1/4 (1505 mm) 59 1/4 (1505 mm)
Weight, Empty
5 Caster Base 375 lb. (170 kg) 465 lb. (211 kg)
4 Caster Base 445 lb. (202 kg) 535 lb. (243 kg)
Capacity , Gross 250 liters 247 liters
Capacity , Usable Liquid 240 liters 240 liters
Weight of Contents Maximum
Based on DOT Relief V alve Setting
Carbon Dioxide N/A 516 lb. (234 kg)
Oxygen 539 lb. (176 kg) 505 lb. (229 kg)
Nitrogen 380 lb. (172 kg) 353 lb. (160 kg)
Argon 655 lb. (297 kg) 614 lb. (279 kg)
Nitrous Oxide N/A 543 lb. (246 kg)
Normal Evaporation Rate**
(% Capacity per Day)
Carbon Dioxide N/A 0.75%
Oxygen 1.0% 1.0%
Nitrogen 1.6% 1.6%
Argon 1.0% 1.0%
Nitrous Oxide N/A 0.75%
Gas Flow Rate @ NTP (@ STP)
Carbon Dioxide N/A 150 cfh (3.9 cu.m/h)
Oxygen, Nitrogen, Argon 350 cfh (9.2 cu.m/h) 350 cfh (9.2 cu.m/h)
Nitrous Oxide N/A 110 cfh (2.9 cu.m/h)
Relief V alve Setting 230 psig 350 psig
(16 bar/1586 kPa) (24 bar/2413 kPa)
Inner Container Bursting Disc 380 psig 525 psig
(26 bar/2620 kPa) (36 bar/3620 kPa)
Dual Pressure Building/
Economizer Regulator***
Pressure Building Setting 125 psig 300 psig
(8.6 bar/862 kPa) (20.7 bar/2069 kPa)
Economizer Setting 145 psig 320 psig
(10 bar/1000 kPa) (22 bar/2206 kPa)
Design Specifications
TC/DOT 4LM/4L 4LM/4L
Gaseous Capacity
Based on DOT Relief V alve
Setting @ NPT (STP)
Carbon Dioxide N/A 4511 cu.ft. (1 19 cu.m)
Oxygen 6511 cu.f t. (171 cu.m) 6100 cu.ft. (160 cu.m)
Nitrogen 5244 cu.ft. (138 cu.m) 4871 cu.ft. (128 cu.m)
Argon 6335 cu.ft. (166 cu.m) 5938 cu.ft. (156 cu.m)
Nitrous Oxide N/A 5419 cu.ft. (142 cu.m)
Specifications subject to change without notice.
* 5 Caster base used for height measure; for 4 Caster square base with handle add approximately 1/2 in. (12.7 mm)
* 8 Vented N.E.R. based on Useable Liquid Capacity.
***Regulator has a pressure delta of 20 psig (1.4 bar/138 kPa).
CAUTION:
When using a hoist,
always insert hooks
into both lifting lugs.
Failure to do so could
result in personal
injury or damage to
the container.
Handling the Container
The XL Series containers are very rugged liquid cylinders. All cryogenic liquid containers
have an inner container and an outer container with an insulated vacuum space between
them. Any abuse (dents, dropping, tip-over , etc.) can af fect the integrity of the containers
insulation system.
When fully loaded, the XL-65HP in argon service will contain up to 614 lb. (279 kg) of
product. While moving a full container, you may be handling up to 1149 lb. (521 kg), and
you should treat the load accordingly . The att achment points provided on the XL65 and
the XL65HP will allow you to use a hoist to handle these loads properly . Do not attempt to
move these cylinders by any other means. When moving the cylinder, the following precautions should be observed:
q Never lay the container on its side. Always ship, operate, and then store the unit in a
vertical, or upright, position.
q When loading or unloading the container from a truck, use a lift gate, crane or parallel
loading dock. Never attempt to manually life the unit.
q T o move the container over rough surfaces, or to lif t the container, att ach an appropri-
ate sling to the lifting points cut into the welded supports posts, and use a portable
lifting device that will handle the weight of the container and its contents.
q Never pull a cylinder downhill; this may cause the handler to lose control of the con-
tainer and possibly cause personal injury .
XL-65 and XL-65HP
Containers
FREIGHT DAMAGE
PRECAUTIONS
ANY FREIGHT DAMAGE
CLAIMS ARE YOUR
RESPONSIBILITY . Cryogenic
liquid containers are delivered to
your carrier from T aylor-Wharton’ s
dock in new condition. When you
receive our product you may
expect it to be in that same
condition. For your own
protection, take time to visually
inspect each shipment in the
presence of the carrier’s agent
before you accept delivery . If any
damage is observed, make an
appropriate notation on the freight
bill. Then ask the driver to sign
the notation before you receive
the equipment. Y ou should
decline to accept containers that
show damage which may affect
serviceability .
OPERATION
The XL-65/65HP will store up to 240 liters of product. The two cylinders can deliver either
liquid or gas. The following component and circuit descriptions are pertinent to the operation of all the containers and should be read before attempting operation. The components
may be identified on the Component Location Illustration.
XL-65 and XL-65HP
Component
Locations
Internal Vaporizer – A liquid container for gas service must have an internal heat exchanger that functions as a gas vaporizer coil to convert liquid product to gas continuously during withdrawal. The XL65-XL65HP utilize an internal heat exchanger that is inside the vacuum space attached to the container’s outer casing. It provides a mean of
introducing heat from outside the container’s insulated jacket, to vaporize liquid as gaseous product is withdrawn. The capacity of this circuit is sufficient to vaporize at flow rates
up to 350 cfh @ NTP (9.2 cu.m/h @STP). If a greater continuous demand is put on the
vaporizer, an external vaporizer should be added to properly warm the gas and avoid
malfunction, or damage, to gas regulators, hoses, and other downstream components.
Pressure Building – A Pressure Building circuit is used to ensure sufficient driving pressure during high withdrawal periods. This function is actuated by opening a hand valve that
creates a path from the liquid in the bottom of the container , through the Pressure Building
Regulator, to the gas space in the top. When the pressure building valve is open, and the
container pressure is below the pressure building regulator setting, liquid taken from the
inner container is vaporized in a heat exchanger which is inside the outer casing. The
expanding gas is fed into the upper section of the container to build pressure. The resulting process will drive either the liquid or gas delivery system.
XL-65 and XL-65HP
Flow Diagram
Pressure Building is not normally required unless container
pressure drops below the gas output pressure desired. If, for
example, the container pressure gauge reads 250 psig (17.2
bar/1724 kPa), and your gas pressure requirement is 270 psig
(19 bar/1860 kPa), and the pressure building valve may be
opened to build container pressure to 300 psig (20.7 bar/2068
kPa).
Economizer – An economizer circuit withdraws gas preferentially from the head space over the liquid container – gas that
would otherwise be lost to venting. Excess pressure in the
head space of the container is relieved by allowing gas to flow
from this area directly to the USE valve outlets while gas is
being withdrawn from the container; yet normal operating pressure is preserved to ensure uninterrupted product delivery . The
economizer is automatic and requires no operator attention.
The USE Valve – This valve controls the gas outlet that allows
product withdrawal through the internal vaporizer. It has the
required CGA connection that matches the gas service for which
the container is configured.
The LIQUID Valve – Liquid product is added or withdrawn
from the container through the connection controlled by this
valve. It has the CGA fitting that is required for liquid line connections. The valve is opened for fill or liquid withdrawal after connecting a transfer hose with
compatible fittings to the LIQUID line connection.
Note:
The economizer and
pressure building
functions are
controlled by a single
dual action regulator.
The pressure delta
between the pressure
building setpoint and
the economizer
setpoint is
approximately 20 psig
(1.4 bar/138 kPa). This
delta cannot be
altered.
The Pressure Building Valve – This valve isolates the liquid in the bottom of the con-
tainer to the Dual Pressure Building/Economizer Regulator. This valve must be open to
build pressure inside the container .
The VENT Valve – This valve controls a line into the head space of the container. It is
used during the fill process. The VENT valve acts as a fill point during a pump transfer , or
to vent the head space area while liquid is filling the inner container during a pressure
transfer fill through the LIQUID valve.
The Pressure Gauge – The pressure gauge displays the internal container pressure in
pounds-per-square-inch or in kiloPascals.
The Full View Contents Gauge – The container contents gauge is a float type liquid
level sensor that indicates container liquid content through a magnetic coupling to a
yellow indicator band. This gauge is an indication of approximate container contents only
and should not be used for filling; liquid cylinders should be filled by weight.
Relief Devices – This cylinder has a gas service relief valve and inner container bursting
disc with settings of 350 psig (24 bar/2413 kPa) and 525 psig (36 bar/3620 kPa) respectively for the XL-65HP and 230 psig (16 bar/1586 kPa) and 380 psig (26 bar/2620 kPa)
respectively for the XL-65. A relief valve of 22 psig (1.5 bar/153 kPa) is available if low
pressure operation is desired. Alternate pressure building regulator and economizer settings are required if medium-pressure relief valves are installed.
Pressure
Building Rates
Graph
RELIEF VAL VES AND RECOMMENDED REGULA TOR SETTINGS
Relief Pressure Normal
Valve Building Economizer Operating
Setting Setting Setting Range
22 psig N/A N/A 0-22 psig
1.5 ba r N/A N/A 0-1.5 ba r
152 kPa N/A N/A 0-152 kPa
23 0 psig 12 5 psig 14 5 psig 125-230 psig
16 bar 8.6 bar 10 ba r 8.6-16 ba r
1586 kPa 862 kPa 1000 kPa 862-1586 kPa
35 0 psig 30 0 psig 32 0 psig 300-350 psig
24 bar 20.7 bar 22 bar 20.7-24 kPa
2413 kPa 2069 kPa 2206 kPa 2069-2413 kPa
Part numbers for alternate valves and regulators are shown in the Sp are Parts section of
this manual.
CAUTION:
When withdrawing
gas from the cylinder,
the capacity of the
internal vaporizer can
be exceeded. If gas is
withdrawn at rates
greater than the
vaporizer capacity,
liquid or very cold gas
will be discharged.
Severe damage to
external equipment
could result from the
extreme cold.
Vaporizer
Performance Graph
WITHDRAWING GAS FROM THE CONT AINER
T o withdraw gas from the XL-65/65HP connect a suitable pressure regulator to the USE
connection, and the output of the regulator to your external equipment. Then open the
USE and the PRESSURE BUILDING valves. When the container pressure reaches 125
psig (8.6 bar/862 kPa) for the XL-65, —or 300 psig (20.7 bar/2069 kPa) for the XL-65HP –
set the pressure regulator for the desired delivery pressure.
Increasing Gas Supply Capacity – T wo or more liquid cont ainers may be manifolded
together. Accessory manifolds are available for use in creating a higher capacity gas
supply system. The XL-65/65HP can supply gas flow rates up to 350 cfh @NTP (9.2
cu.m/h @ STP) using only its internal vaporizer . At low rates, the gas supplied will be at
near ambient temperatures. As the flow demand is increased, the gas will become proportionately colder. If greater vaporizing cap acity is required, an accessory external vaporizer
is available. When an external vaporizer is used, it must be connected to the USE valve
and the regulator moved to the output of the external vaporizer.
WITHDRAWING LIQUID FROM THE CONT AINER
Liquid Withdrawal
CAUTION:
To avoid
contamination, close
the LIQUID valve on
an empty container
before disconnecting
the transfer line.
Attach a transfer hose to the LIQUID connection and open the adjacent LIQUID valve. The
pressure in the container will drive liquid product out through the valve as long as the
container pressure exceeds that of the receiver .
The rate of liquid withdrawal from these containers is variable depending on the gas phase
pressure and the saturation temperature of the liquid.
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