Taylor-Wharton XL-55 User Manual

Instructions For

Instructions for

TW-287

XL-45, XL-50 and XL-55

XL-45, XL-50 and XL-55

with Dual Regulator

with Dual Regulator

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 230 psig (16 bar/1586 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 build-up 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 cover your skin when handling the container or transfer­ring liquid, or in any instance where the possibility of contact with liquid, cold pipes, 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 gases cannot be
detected by the human senses and will be inhaled normally as if they were air. Ensure
there is adequate ventilation where these gases are used and store liquid containers or
only in a well ventilated area.

Replacement Parts Must be “Cleaned for Oxygen Use” – 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 T aylor-Wharton recommended spare p arts, and be certain part s used on
oxygen or nitrous oxide are marked “cleaned for oxygen service.” For information on
cleaning, consult the Compressed Gas Association (CGA) pamphlet G-4.1, “Cleaning for
Oxygen Service” or equivalent industrial cleaning specifications.

GENERAL
INFORMATION

Install Relief Valves in Cryogenic Liquid Lines – When installing piping or fill hose
assembly, make cert ain 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-45, XL-50 and XL-55 are vacuum insulated, stainless steel containers designed to
store and transport cryogenic liquid oxygen, nitrogen or argon. 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 350 cfh (9.2 cu.m/h) with a delivery
pressure of approximately 100 psig (6.9 bar/690 kPa).

SPECIFICATIONS

XL-45 XL-50 XL-55

Dimensions

Diameter 20 in. (508 mm) 20 in. (508 mm) 20 in. (508 mm)
Height 61 ½ in. (1562 mm) 64 5/8 in. (1641 mm) 69 7/8 in. (1764 mm)

Weight
Empty (Nominal) 255 lb. (1 16 kg) 270 lb. (122 kg) 270 lb. (122 kg)

Capacity, Gross 180 liters 193 liters 210 liters
Capacity, Usable Liquid 169 liters 181 liters 200 liters
Weight on Contents Max.

Based on DOT Rated Service Pressure

Oxygen 388 lb. (176 kg) 416 lb. (189 kg) 454 lb. (206 kg)
Nitrogen 273 lb. (124 kg) 293 lb. (133 kg) 319 lb. (145 kg)

Argon 471 lb. (214 kg) 505 lb. (229 kg) 551 lb. (250 kg)
Normal Evaporation Rate*
(% Capacity per Day)
Oxygen/Argon 1.2% 1.1% 1.1%
Nitrogen 1.9% 1.8% 1.7%

Gas Flow Rate @ NTP (STP**)
Oxygen, Nitrogen, Argon 350 cfh (9.2 cu.m/h) 350 cfh (9.2 cu.m/h) 350 cfh (9.2 cu.m/h)
Relief V alve Setting 230 psig 230 psig 230 psig

(16 bar/1586 kPa) (16 bar/1586 kPa) (16 bar/1586 kPa)

Inner Container Bursting Disc 380 psig 380 psig 380 psig

(26 bar/2620 kPa) (26 bar/2620 kPa) (26 bar/2620 kPa)

Dual Pressure Building/
Economizer Regulator***

Pressure Building Setting 125 psig 125 psig 125 psig

(8.6 bar/862 kPa) (8.6 bar/862 kPa) (8.6 bar/862 kPa)

Economizer Setting 145 psig 145 psig 145 psig

(10 bar/1000 kPa) (10 bar/1000 kPa) (10 bar/1000 kPa)

Design Specifications

TC 4LM 4LM 4LM

DOT 4L 4L 4L
Gaseous Capacity

Based on DOT Rated Service Pressure

@ NTP (STP)

Oxygen 4688 cu. ft (123 cu.m) 5025 cu.ft (132 cu.m) 5484 cu.ft.(144 cu.m)

Nitrogen 3771 cu. ft (99 cu.m) 4043 cu. ft(106 cu.m) 4402 cu. ft(116 cu.m)

Argon 4558 cu. ft(120 cu. m) 4884 cu. ft(128 cu. m) 5331 cu. ft(140 cu.m)

Specifications are subject to change without notice
* Vented N.E.R. based on Usable Liquid Capacity
** Container pressure at or above factory Dual Pressure Building/Economizer Regulator setting
*** Regulator has a pressure delta of 20 psig (1.4 bar/138 kPa)

XL-45, XL-50, XL-55
Containers

Handling the Container

The XL Series containers are very rugged liquid cylinders. All cryogenic liquid cylinders
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-55 in argon service will contain 551 lb. (250 kg) of product.
While moving a full container, you may be handling 821 lb. (372 kg) and you should treat
the load accordingly . The attachment points provided on the XL-45/50/55 will allow you to
use a hand truck or a hoist to handle these loads properly . Do not attempt to move these
cylinders by any other means. While moving the cylinder, the following precautions should
be observed.

q Never lay the cylinder on its side. Always ship, operate and store the unit in a vertical

or upright position.

q When loading or unloading the container from a truck, use a hand truck, lift gate, crane

or parallel loading dock. Never attempt to manually lift the unit.

q T o move the container over rough surfaces, or to lif t the container, att ach an appropri-

ated sling to the lifting points cut into the welded support posts, and use a portable

lifting device that will handle the weight of the container and its contents.

FREIGHT DAMAG E
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-45 will store up to 169 liters of product, the XL-50 up to 181 liters and 200 liters
for the XL-55. All three 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-45/50/55
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 XL-45/50/55 utilizes an internal heat exchanger that is inside
the vacuum space attached to the container’s outer casing. It provides a means 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 liquid as gaseous
product is withdrawn. The capacity of this circuit is sufficient to vaporize product 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

XL-45/XL-50-XL-55
Flow Diagram

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 pressure will drive either the liquid or gas deliv­ery system.

Pressure Building is not normally required unless con­tainer pressure drops below the gas output pressure de­sired. If, for example, the container pressure gauge reads
75 psig (5 bar/517 kPa), and your gas pressure re­quirement is 100 psig (6.9 bar/690 kPa), the pressure
building valve may be opened to build container pres­sure to 125 psig (8.6 bar/862 kPa).

Economizer – An economizer circuit withdraws gas pref­erentially from the head space over the liquid in the 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 outlet 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 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 open 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.

RELIEF VALVES AND RECOMMENDED REGULATOR SETTINGS

Relief Pressure Normal
Valve Building Economizer Operating

Setting Setting Setting Range

22 psig N/A N/ A 0-22 psig

1.5 bar N/A N/A 0-1.5 bar

152 kPa N/A N/A 0-152 kPa
230 psig 125 psig 145 psig 75-175 psig

16 bar 8.6 bar 10 bar 5-12 bar

1586 kPa 862 kPa 1000 kPa 517-1207 kPa

The PRESSURE BUILDING V alve – This valve isolates the liquid in the bottom of the

container to the Dual Pressure Building/Economizer Regulator. This valve must
be open to build pressure inside the container .

Pressure
Building Rates
Graph

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.

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 kilo Pascals.

The Full View Contents Gauge – The container contents gauge is a float type liquid
level sensor that indicates container liquid 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 – These cylinders have a gas service relief valve and inner container
bursting disc with settings of 230 psig (16 bar/1586 kPa) and 380 psig (26 bar/2620 kPa)
respectively. A 22 psig (1.5 bar/152 kPa) relief valve is available for liquid delivery applica­tions.

WITHDRAWING GAS FROM THE CONTAINER

T o withdraw gas from the XL-45/50/55 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), set the pressure regulator for the desired delivery pressure.

Vaporizer
Performance
Graph

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-45/50/55 can supply gas at flow rates 1 up to 350 cfh @ NTP (9.2
cu.m/h @ STP) using only its internal vaporizer . At low flow rates, the gas supplied will be
at near ambient temperature. As the flow demand is increased, the gas will become
proportionately colder. If greater vaporizing capacity 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 CONTAINER

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.

Liquid
Withdrawal

CAUTION:
To avoid
contamination, close
the LIQUID valve on
an empty container
before disconnecting
the transfer line.

The rate of liquid withdrawal from these contain­ers is variable depending on the gas phase and
the saturation temperature of the liquid.

FILLING THE CONTAINER

Cryogenic liquid containers must always be filled
by weight to ensure there is enough gas head
space (ullage) for liquid to expand as it warms.
Using the procedure below, first determine the
proper filled weight of each container. The weight
derived is then used in either the Pump Transfer
of Pressure Transfer filling procedures that fol­low.

Determine Proper Fill Weight

1. Visually inspect the container . Do not attempt to fill containers with broken or missing
components.

NOTE:
The weight calculation
includes the weight of
residual liquid and is
applicable to both
Pressure Transfer and
Pump Transfer filling
methods.

WARNING:
Filling operations
should take place only
in well ventilated
areas. Accumulations
of product gas can be
very dangerous (refer
to the safety
precautions in the
front of these
instructions.) Maintain
adequate ventilation
at all times.

2. Move the container to a filling station scale and weight it both with and without the fill
hose attached to determine the weight of the fill line assembly . The difference is the fill
line weight.

3. To determine the weight at which the fill should be stopped, add the desired filling
weight (from the table below), the transfer line weight, and the Tare W eight from the
container’s data plate.

FILLING WEIGHTS

XL-45 XL-50 XL-55

ARGON 471 lb. (214 kg) 505 lb. (229 kg) 551 lb. (250 kg)
NITROGEN 273 lb. (124 kg) 293 lb. (133 kg) 319 lb. (145 kg)
OXYGEN 388 lb. (176 kg) 416 lb. (189 kg) 454 lb. (206 kg)

Pressure Transfer Filling Method

Filling a liquid cylinder using the pressure transfer method is common for 22 psig (1.5 bar/
152 kPa) service where the product is used for refrigerant purposes. This method may
also be used for higher pressure cylinders to increase liquid holding time. A fill is accom­plished by first establishing a pressure difference between the source vessel and the XL­45/50/55 (higher pressure at the bulk vessel). The pressure differential will then push the
liquid from the storage vessel to the container being filled. This method is employed when
no transfer pump system is available, or if a greater control over liquid temperature is
desired.

Filling the container is accomplished through the LIQUID valve while the VENT valve is
open or partially open to control product pressure. Careful control of pressure will control
the amount of heat retained in the liquid. Lower pressure results in colder liquid trans­ferred to the container and increases, or lengthens, product holding time.

Pressure Transfer Filling Procedure (Low Pressure Source) - Once you have deter­mined the proper full weight for a container , connect a transfer hose to the LIQUID fitting
from a low pressure source of liquid.

1. Open the supply valve. Then, on the XL-45/50/55, open the LIQUID and VENT valves to
begin the fill.

Pressure Transfer
Filling From a Low
Pressure Source

2. During the fill, monitor the container pressure and maintain a pressure of 10-15 psig
(0.7-1 bar/69-103 kPa) by throtting the VENT valve.

3. When the full weight is reached, close both the LIQUID and VENT valves.

4. Close the liquid supply valve and open the dump valve on the fill line assembly .

5. Disconnect the fill line from the container and remove the container from the scale.

Pump Transfer Filling Method

When a pump is used for filling liquid containers, the fill may be accomplished through
either the VENT valve or the LIQUID valve. Filling through the VENT valve recondenses
gas in the area over the liquid in the cylinder and reduces product loss during the fill. This
method will also result in liquid near the saturation temperature of the supply vessel.
Filling through the LIQUID valve may provide colder liquid and longer holding time before
the liquid warms to the point where venting beings, but will require more frequent venting
and greater product loss.

Pump Transfer Filling Procedure - This method applies only to containers in gas
service that are equipped with a 230 psig (16 bar/ 1586 kPa) relief valve. Liquid is admitted
through the VENT valve and recondenses gas in the head space during the fill. The fill line
is connected from the liquid supply to the VENT valve on the cylinder . Both the fill line and
the container should be pre-cooled prior to beginning the fill process. Proper full weight is
determined by the previously explained method.

1. Open the supply valve. Then, on the container being filled, open only the VENT valve to
begin the fill. Start the pump at this time.

2. Observe the container pressure closely. If the pressure approaches the relief valve
setting (or the dump pressure rating) stop the fill process at the supply and open the fill
line dump valve to vent excess pressure. As soon as the pressure has dropped to a
level that will allow you to resume the fill, close the dump valve and restart the pump (or
reopen the supply valve.)

3. When full weight is reached, close the VENT valve. Stop pump (where applicable),
close liquid supply valve and open the dump valve on fill line assembly to vent trapped
liquid.

4. Disconnect the fill line from the container and remove the container from the scale.

Fill Hose Kits

T aylor-Wharton fill hose kits for the XL-45/50/55 are designed to transfer specific liquefied
gases to, or from, the containers. These accessories are comprised of a Fill Tee Assem­bly and a Fill Hose. Cryogenic transfer hoses are constructed of stainless steel for the
transfer of cryogenic liquids and are available in four or six feet (1.2 or 1.8 m) lengths with
a 3/8 in. NPT fitting on one end and CGA service-specific female fitting on the other . A Fill
Tee Assembly consists of a cross fitting with a CGA end fitting, relief valve and manual
dump valve.

Pump Transfer Liquid
Fill Through Vent
Valve

In use, the CGA T ailpiece couples to the fill connection on the container being filled. The
Relief V alve vents pressure over 350 psig (24 bar/2413 kPa) that builds up in the fill line
due to trapped liquid. The Dump Valve is used to allow the operator to blow-down the
receiving container during a pump fill, or to relieve residual pressure from expanding liquid
trapped in the line before disconnecting the fill line.

Fill Hose Kits

Fill kits are available with different combinations of hose length and fittings for a specific
gas service. The following chart identifies the available transfer hoses and fill tee assem­blies.

TRANSFER HOSE CHART

Description Cylinder End Part
(Service/Hose Length) Connections(s) Fittings Number

Inert (N2,Ar) Service

4 ft. (1.2 m) Stainless Steel LIQUID or VENT Valve CGA 295 to 3/8 in. NPT 1700-9C65
6 ft. (1.8 m) Stainless Steel LIQUID or VENT Valve CGA 295 to 3/8 in. NPT 1600-9C66
6 ft. (1.8 m) Stainless Steel USE Valve CGA 580 to 3/8 in. NPT GL50-8C51

Oxygen Service

6 ft. (1.8 m) Stainless Steel LIQUID or VENT V alve CGA 440 to 3/8 in. NPT GL-8C53
6 ft. (1.8 m) Stainless Steel USE Valve CGA 540 to 3/8 in. NPT GL50-8C56

VENT TEE CHART

The vent tee connects to transfer hose to complete a fill line kit. Each assembly includes
a 3/8 in. pipe connector to CGA fitting with a 350 psig (24 bar/2413 kPa) relief valve, and
a ball-type dump valve.

MAINTENANCE
PROCEDURES

Service CGA Connection Part Number

Inert (N2, Ar) CGA 295 GL50-8C60

Read the Safety Precautions in the front of this manual before attempting any repairs on
these containers. Also follow these additional safety guidelines while performing con­tainer maintenance.

Never work on a pressurized container. Open the vent valve as a standard practice
during maintenance to guard against pressure build-up from residual liquid.

Use only repair parts cleaned for oxygen service. Be certain your tools are free of oil
and grease. This is a good maintenance practice, and helps ensure you do not create a
combustion hazard when working on containers for oxygen or nitrous oxide service.

Leak test connections after every repair . Pressurize the container with an appropriate
inert gas or leak testing. Use only approved leak test solutions and follow the manufacturer’s
recommendations. “Snoop” Liquid Leak Detector is one approved solution, it is available
from: Nupro Co. 4800 E. 345th St. Willoughby , Ohio 44094 U.S.A.

WARNING:
For the O2 System
Users: Residue of leak
detectors solutions
can be flammable. All
surfaces to which the
leak detector solutions
have been applied
must be adequately
rinsed with potable
water to remove all
traces of residue.
Reference CGA G-4.
Section 4.9.

CONVERTING A CONT AINER TO A DIFFERENT GAS SERVICE

XL-45/50/55 cylinders may be converted from one service to another within the confines of
the argon, nitrogen, and oxygen service for which the containers are designed. Conver­sion consists of changing the end connections at the USE, LIQUID, and VENT valves;
then changing the liquid level gauge scale by changing its plastic cover; and revising
product decals. Parts are available in kit from for each gas service as illustrated in the
following table.

Service Change Procedure

Before removing any parts, empty the container and open the vent valve to prevent any
pressure build-up in the unit.

1. Remove the LIQUID, VENT , and USE end fittings, one at a time, with standard wrenches.
Install new fittings from the Gas Service Change Kit, using Teflon tape or another
oxygen-compatible thread sealant.

2. Remove the protective cover over the liquid level gauge. Replace the contents scale
with the scale for the new gas service from the service change kit, then replace the
protective cover.

3. Install new fittings for the USE, VENT , and LIQUID connections from the Gas Service
Change Kit. Leak test the fittings you just replaced, and change the gas service de­cals to complete the conversion.

CAUTION:
When changing gas
service, install the
proper fittings – DO
NOT use adapters. The
following procedures
address the physical
changes to the
container only. For
detailed procedures
on the
decontamination of
the container itself,
refer to CGA pamphlet
C-10 “Changes of
Service for Cylinders
Including Procedures
for Inspection and
Contaminant
Removal.”

GAS SERVICE CHANGE KITS

Kit Valve Connection
Part No. Gas Service Name Designation

GL50-8C35 Oxygen LIQUID CGA 440

VENT CGA 440
USE CGA 540

GL50-8C30 Nitrogen LIQUID CGA 295

VENT CGA 295
VENT CGA 295
USE CGA 580

GL50-8C31 Argon LIQUID CGA 295

VENT CGA 295
USE CGA 580

REGULA TOR MAINTENANCE

A dual stage, spring-loaded regulator is employed for the pressure building/economizer
circuit. This regulator can be adjusted on the container, replaced, or checked and ad­justed off the container in a readily fabricated bench adjustment fixture.

NOTE:
One clockwise turn of
the adjustment will
raise the setpoint by
approximately 30 psig
(2 bar/207 kPa). See
the chart below to
determine the range
of adjustment for the
regulator you are
servicing. Do not
attempt to set the
regulator to a pressure
outside of its design
range.

Regulator Adjustment – On Container

1. Fill the container with the appropriate liquid product.

2. Open the Pressure Building Valve and allow the container pressure to stabilize for
about an hour. Note the point where the pressure stabilizes.

3. Adjust the screw on the top of the regulator to raise or lower the pressure to the
desired point. When decreasing the setting, the pressure building valve must be closed
and the container vented to a lower pressure. Then repeat step 2 in order to observe
the change.

Part No. Normal Setting Range Delta

6999-9015 125 psig 75 to 175 psig 2 0 psig

8.6 bar 5 to 12 bar 1.4 bar

86 2 kPa 517 to 1207 kPa 1 38 kPa

Regulator Removal or Replacement Procedure

1. Close manual Pressure Building V alve.

2. V ent the container to atmospheric pressure.

3. Loosen and remove both the tube connections on the pressure building and econo­mizer output sides of the regulator.

4. Remove the regulator from the container by unscrewing the valve body and elbow from
the output of the Pressure Building V alve.

5. Repair the regulator and readjust its setpoint using the bench test setup.

6. T o install a replacement or readjusted regulator , apply Teflon tape to the elbow on the
container and thread the valve body onto the elbow .

7. Reconnect the tube connections to the regulator and tighten.

8. Pressurize the container and check it for leaks.

Regulator Adjustment – Bench Procedure

NOTE:
The regulator has
directional gas flow.
The arrow on the
regulator body must
point in direction
indicated in the Bench
Adjustment Fixture
illustration.

Regulator
Bench
Adjustment
Fixture

Assemble the regulator adjustment fixture, and the regulator to be adjusted, as shown in
the accompanying illustration.

1. Leak test joints between the high pressure cylinder and the dump valve. Joints must
be leak free before proceeding.

2. Close the on/off valve and the Dump valve.

3. Slightly open the high pressure cylinder valve.

4. Set the high pressure regulator above the desired set point for the Pressure Building
setpoint.

5. Slowly open the on/off valve and observe the downstream pressure gauge.

NOTE:
The economizer
portion of the
regulator has already
opened approximately
20 psig (1.4 /138 kPa)
below the pressure
building setpoint.

6. When the regulator under test closes, the P.B. set point may be read on the down­stream pressure gauge.

7. Close the on/off valve, and open the Dump valve.

8. To reset the regulator, loosen the lock nut on the adjusting screw . Raise the setpoint
by turning the adjusting screw clockwise; lower the setpoint by turning the screw
counter-clockwise. Af ter adjustment, repeat steps 5 and 6 to check the setting before
reinstalling the regulator on the liquid container .

NOTE:
Fill through the
LIQUID valve with the
VENT valve open. The
Pressure Building
valve must be closed
during the NER test or
P.B. operation will
increase evaporation
and invalidate test
results.

CHECKING CONTAINER PERFORMANCE

Cryogenic containers are two container, one within the other. The space between the
containers acts as a highly efficient thermal barrier including high technology insulation, a
vacuum, and a vacuum maintenance system. Each serves a very important part in the
useful life of the container . The high technology insulation is very effective in preventing
radiated heat from entering the inner container . Unfortunately, the perfect vacuum can­not be achieved since trace gas molecules begin to enter the vacuum space from the
moment of manufacture. The vacuum maintenance systems consists of materials which
gather trace molecules from the vacuum space. The maintenance system can perform
its function for years, but it has a limited capacity. When the vacuum maintenance
system is saturated it and no long maintains the vacuum integrity of the container. The
change will be very gradual and my go unnoticed for several years. When the vacuum in
the insulation space is no longer effective, the following symptoms may appear:

1. With liquid in the container and pressure building/vaporizer coil not in use, the outer
casing will be much colder than comparative containers.

2. Frost, indicating the liquid level, may be visible on the outer casing of the container .

3. The container may appear to “sweat” if the air surrounding the container is hot and
humid.

4. The relief valve will open continuously until the container is empty .

5. The container will hold pressure for several days but will not hold liquid.

NER T esting

If a loss of vacuum integrity is suspected, the container’s Normal Evaporation Rate (NER)
should be checked. The test measures the actual product lost over time so you can
compare the results obtained to the NER value in the SPECIFICATIONS table. A test
period of 48 hours is recommended, after the container is allowed to stabilize, but the
formula given produces a Daily NER over any time period.

1. Fill the container with 150 pounds (68 kg) of liquid nitrogen.

2. Close the LIQUID valve and the PRESSURE BUILDING valve, leave the VENT valve
open and allow it to remain open during the test.

3. Allow the container to stabilize for 24 hours, then reweigh it. Record the weight, time
and date.

4. Reweigh 48 hours later. The test is more effective if container is not moved during this
period. Record the second date, time and weight.

The following calculation will provide the actual Normal Evaporation Rate in pounds-per­day . Daily normal evaporation is simply half the lost over 48 hours.

Daily NER =

Compare the results of your test to the “as manufactured” NER value in the SPECIFICA­TIONS section of this manual. A container in service should maintain an NER value of less
than two time the new specification. Any test result greater than two times the listed value
is indicative of a failed, or failing vacuum. If NER is found to be high, contact Taylor-

Weight (Step 3) – Weight (Step 4)
Time between S tep 3 and 4 in hours x 24

WARNING:
Cold surfaces should
never be handled with
bare skin. Use gloves
and other protective
clothing when
performing this
procedure.

Wharton Customer Service at [phone] for disposition.

FULL VIEW CONTENTS GAUGE MAINTENANCE

The content of these containers is measured with the Full View Contents Gauge. The
device consists of the gauge assembly beneath a clear plastic protective cover. When the
gauges is assembled, a level indicator ring is magnetically coupled to the top of a float
road and moves up or down with the changing level of liquid in the container . The clear
cover over the gauge body and level indicator is sealed at assembly to resist fogging of the
gauge. This seal should never need to be broken.

REMOVING THE FULL VIEW CONTENTS GAUGES

1. Vent all pressure from cont ainer .

2. Remove the protective coating by removing three bolts from the base of the cover.

3. Unscrew the gauge body using a wrench on hex fitting at base of the indicator.

4. Lift the entire gauge assembly free of the container. The gauge assembly is long and
may be very cold. Gloves should be used to protect your skin.

Calibration Procedure for Liquid Level Contents Gauges

1. You will need a column of water approximately 4 ft. (1.2 m) tall. A clear plastic tube 2.0
in. (51 mm) dia. with a cap glued to one end is perfect. Place an oxygen service
contents scale sleeve (P/N GL50-9C43) over the sight tube.

2. Support the gauge assembly by holding the base of the indicator tube. Care must be
taken to prevent interference with the spring action or from misaligning the scale sleeve.
Immerse teh aluminum float rod below the water level as illustrated. The gauge assem­bly must be held vertically and the rod must not touch the side or bottom of the tube.
The yellow level indicator of the gauge should indicate a full level reading with the
oxygen scale.

If the gauge fails to indicate a full liquid level, the assemlby is to be removed from the
water, calibrated and retested.

T o change calibration, loosen locking nut away from the brass calibration nut, the exposed
portion of rod becomes longer and the gauge yellow band will be lowered.

T o raise the yellow band, turn rod counterclockwise. The exposed portion becomes shorter .
Once you have adjusted calibration, recheck for proper setting. (See illustration.) After
proper setting has been obtained, lock down nut against calibration nut.

3. Once the gauge assembly has been calibrated and to read full in water, it must be
verified that it reads empy when the aluminum floating rod is suspended in air. The
yellow indicator must be as cloase to the bottom as possible (inner rod will be firmly
bottomed out.)

If calibration is required to make the gauge read empty in air, it must be rechecked in

water.

4. Af ter calibration, you will need to follow content s gauge inst allation to reinsert gauge.
Be sure to dry the assembly before reinserting into the cylinder to prevent ice build-up
that could restrict movement or catch on teh guide ring inside the cylinder.

Full View Contents
Gauge

NOTE:
The yellow band will
move approximately
¼ in. (6.4 mm) to each
10 turns of the rod.

NOTE:
Make sure that the
Gauge Assembly is not
bent or out of line
before reinserting that
gauge into the
container.

Calibration For
XL-45, XL-50, XL-55

Contents Gauge Installation

Before installing a new or repaired gauge, inspect the gasket seals. If any damage is
apparent, replace the gasket. (See following page for illustration.)

1. When inserting the gauge assembly, lower the float rod through the gauge opening
until about 8 in. (203 mm) of the float rod remains above the container .

2. Grasp the clear cover portion of the gauge assembly with two fingers so that the
assembly hangs free and “plumb.”

3. Lower the assembly about 4 in. (102 mm) slowly and try to keep the rod in the center
of the threaded entrance hole as you do. If you are careful during this portion of inser­tion, you will drop the float rod straight though the guide ring inside the cylinder.

4. To confirm that the rod is correctly positioned in the cylinder, stop where you can still
grasp the top of the rod (See illustration.) and try to swing the lower end from side to
side.

5. When the rod is engaged in the guide ring, the rod will be restricted to lower end
movement of about ½ in. (12.7 mm); if you can feel greater movement, withdraw the
rode to the point where its top is 8 in. (203 mm) above the gauge opening and try

CAUTION:
When installing the
gauge assembly, care
must be taken to
ensure that the float
rod is inserted through
the “guide ring”
located on the liquid
withdrawal line inside
the container. If the
gauge does not
engage this ring, the
contents indication
will be inaccurate, or
the gauge may be
damaged in use.

Contents Gauge
Insertion

again.

6. When you are satisfied that the float rod is correctly installed, lower the assembly the
rest of the way into the container until the top portion threads can be engaged.

7. Screw the gauge in place and hand torque to about 20 ft lbf (2.8 kgf m). Leak check the
connection of gauge body to the flange.

HAND VALVE REPAIR

Hand valve are an integral part of the container, and the valve bodies rarely need re­placement. However, the handwheel and internal p arts of the valves are renewable. The
illustration below are exploded views of the valves replaceable parts used on Taylor­Wharton liquid containers.

Valve Repair Kit

Fits: 3/8 in. or 1/2 in. Rego Globe or 3/8 in. Sherwood valves.

KIT P ARTS - KIT P/N 1750-9C35

Item No. Description Qty.

1 Screw and Washer 1
2 Spring Retainer 1
3 Retainer Washer 1
4 Spring 1
5 Seal Washer 1
6 Seal 1
7 Handwheel 1
8 Bonnet Washer 2

9 Bonnet 1
1 0 Stem Gasket 1
11 Stem 1
1 2 Seat Assembly 1
13 Bushing 1
14 Body *

T Q T orque 80 ft. lbf (1 1 kgf m) 1

Hand Valve­Exploded View

*Not available as a repair part

Valve Disassembly Instructions

1. Open valve by turning handwheel counterclockwise as far as it will go to release any
trapped gas in the system.

2. Using a screwdriver, remove Handwheel Screw and W asher by turning counterclock­wise to allow removal of Spring Retainer , Washer , Spring, Seal W asher, Seal, Handwheel
and Bonnet Washers. Discard these parts.

3. Using a large adjustable wrench to hold valve body , remove Bonnet by turned counter­clockwise with a 15/16 in. socket wrench that is capable of developing at least 80 ft. lbf
(1 1 kgf m) torque.

4. Remove the following parts from the valve body and discard – Stem, Stem Gasket,
Seat Assembly and Bushing.

5. Inspect body and clean if necessary; be sure interior and seal areas are free from dirt,

residue and foreign particles.

Valv e Replacement Instructions

1. Partially thread Seat Assembly (12) (seat disc first) into large end of Bushing (13)
leaving a tang of nipple assembly exposed about 1/8 in. beyond top of Bushing.

2. Insert Seat Assembly (seat disc first) with attached Bushing, into valve body until
properly seated.

3. Place Stem Gasket (10) carefully over S tem (1 1) convex side facing downward.

4. Insert slotted end of S tem into valve body , making sure that slot fully engages tang of
Seat Assembly .

5. Place Bonnet over Steam and while holding square end of S tem to keep it from turning,
thread Bonnet (9) into valve body . Hold body with one wrench and using another wrench
(15/16 in. socket), tighten Bonnet to 80 ft lbf (1 1 kgf m) torque.

6. Install Bonnet W ashers over Stem on Bonnet.

7. Place Handwheel over Stem and on Bonnet.

8. Install Seal (6) over S team into recess of Handwheel.

9. Install Seal Washer (5) over Seal at the bottom of Handwheel recess shown.

10. With the flat side facing downward, place Retainer Washer (3) on top of Seal.

1 1. Align the holes of these parts and place Spring (4) over Seal.

12. Place Spring Retainer (2) over assembly as shown, keeping center hole aligned with

parts installed in steps 6-11.

13. Install Screw and Washer (1) over retainer. Tighten firmly with a screwdriver , turning

clockwise.

14. Turn Handwheel completely clockwise to close valve. Re-pressurize container and

leak check valve.

SHOCK MOUNT FOOT RING

Item No. Description Part No. (XL-55 Only) Qty.

1 Rubber Shock Ring XL50-4C18 (GL55-4C21) 1
2 Foot Ring XL50-4C19 (GL55-4C19) 1
3 Hex Nut 6310-0135 4
4 Washer 6430-0125 4
5 Carriage Bolt 6620-0401 4

Replacement of Shock Mount Foot Ring

1. Empty or transfer all contents of tank. Vent to atmospheric pressure.

2. Gently lay the container on its side and unbolt the four (4) carriage bolts that attach the
foot ring and rubber shock ring to the tank.

Shock Mount
Foot Ring ­Exploded View

3. Slide off the damaged foot ring and rubber shock ring.

4. Assemble rubber shock ring into new foot ring and force over shock mount ring on
container . Use a rubber hammer to drive the rubber shock ring into place.

5. Using a 1/2 in. drill bit, drill holes through the rubber so that the carriage bolt slides in
smoothly.

6. The holes in foot ring must be positioned in alignment with holes in shock mount ring.
Using the 4 bolts, washers and nuts, fasten the new parts to the cont ainer .

7. After securing the shock mount ring, gently lift the container to the upright position and

TROUBLESHOOTING

The following chart is provided to give you some guidance in determining the probable
cause and suggested corrective action for some problems that may occur with cryogenic
liquid containers. This chart is specifically tailored to your XL-45, XL-50, or XL-55.

Symptom Possible Cause Corrective Action

Consistently low 1. Relief valve open at low 1. Remove and replace relief
operating pressure. pressure. valve.

then inspect your work.

TROUBLESHOOTING CHART

2. Economizer side of 2. Remove and replace
P .B./Economizer Regulator re gulator.
stuck open.

3. Cold liquid. 3. Open pressure building valve.

With P .B. inoperative, the
container will build pressure
over time, or an external
pressure source can be used
to pressurize container.

No pressure shown 1. Bad container pressure 1. Remove and replace bad
on container gauge. gauge.
pressure gauge. 2. Open inner container 2. Remove and replace bursting

bursting disc. disc. Pressurize container

and check relief valve
operation.

3. Leaks in valves or 3. Leak test and repair leaks.
plumbing. For valve repairs, see

Maintenance section.

4. Cold liquid. 4. Open pressure building

circuit.

No pressure showing 1. Broken pressure gauge. 1. Replace pressure gauge.
but container is full 2. V ent valve open/P.B. 2. Close vent valve, open P .B.
by weight. valve closed. valve.

3. Faulty relief valve. 3. Replace relief valve.

Container full by 1. Liquid too cold. 1. Open P .B. valve or allow
weight and Liquid to stand.
Level Gauge but very 2. Possible leak in vent valve. 2. Rebu ild val ve.
low pressure 3. Faulty relief valve. 3. Replace valve.

TROUBLESHOOTING CHART

Symptom Possible Cause Corrective Action

Container is cold and 1. Vacuum loss. Check NER. 1. Consult with T aylor-Wharton
may have ice or frost for course of action. Do not
on outer casing. Will attempt to put additional
not hold liquid over- liquid in container.
night. Relief valve is 2. Defective P .B./Economizer 2. Look for P.B. coil pattern in
venting gas. regulator. ice. Close P .B. valve.

Replace or reset regulator.

Ice formation on 1. Pressure building valve 1. Replace or rebuild valve.
bottom of container not closing properly.
when P .B. valve is 2. Leak in pressure 2. Leak test piping
closed. building system connections and tighten

topworks. fittings if needed.

Container vents Pressure Building/ Remove and reset or replace
through relief valve Economizer Regulator set regulator .
when in use. above relief valve setting.

Economizer side of
regulator clogged or
stuck open.

Container vents after This may be caused by Symptom should go away
fill but quits after residual heat vaporizing once container reaches
awhile. some liquid inside operating temperature and

container and is a normal the liquid reaches its
condition. saturation point at container

operating pressure.

Container vents gas Heat leak may be too Perform container
continuously through great. performance evaluation test
relief valve. per Maintenance section to

determine if container
vacuum is adequate.

Level indicator stuck Float rod stuck on or in Reinstall. See Contents
1/2 full. Y ellow float rod guide. Gauge Installation.
indicator ring will not
move.

Level indicator at Indicator disengaged from Recouple indicator using
bottom of gauge. gauge rod. Caused by engagement ring.
Container full of dropping the container .
product.

REPLACEMENT
PARTS

XL-45/50/55
Component
Locations

This replacement part list include a recommended inventory quantity which allows you to
order part on a timely basis to keep all your XL-45/50/55 containers in service. When
placing orders, please use the nomenclature and part numbers in this section and send
written orders to:

T aylor-Wharton Fax: [phone]

ACCESSORIES

4075 Hamilton Blvd. Call: 1-334-443-8680
Theodore, AL 36590-0568 1-800-898-2657 in USA and Canada

Accessories available for use with Taylor-Wharton XL Series containers are:

-

Manifolds, Automatic and Manual

-

V aporizers adding up to 250 cfh
(6.6 cu.m/h) each

-

Transfer Hoses (O2, N2, and AR)

-

Fill T ee Assemblies

For additional information concerning the accessory of your choice, please consult the
separate manuals on accessories or call Taylor-Wharton.

-

Container Hand Trucks

-

Gas Service Changeover Kits

-

Cryogenic Phase Separators

Index Recommended

No. Description Part No. For 10 Units

1. Dual Regulator, Pressure Building/Economizer 69999-9015 2 Each
125 psig (8.6 bar/862 kPa)

* 2. Gasket, Glass Filled Teflon, Contents Gauge 7701-0083 5 Each

3. Contents Gauge Assembly (Includes Gauge and Spring) GL45-9C65 1 Each
* Float Rod (45/50) GL45-9C96 1 Each
(55) GL45-9C97 1 Each

4. Contents Gauge Cover, Protective Clear GL50-9C54 4 Each
Snap-on indicator, Nitrogen GL45-9C75 4 Each
Snap-on indicator, Oxygen GL45-9C77 4 Each
Snap-on indicator, Argon GL45-9C76 4 Each

5. Screw, Brass, 1/4 in. - 20 UNC x 5/8 in. 6114-1088 10 Each

5a. Washer, Lock, 1/4 in., Stainless Steel 6460-2025 10 Each

6. Gauge, Pressure 0-400 psig (0-28 bar/0-2758 kPa) 7702-6196 2 Each

7. Safety Head 380 psig (26 bar/2620 kPa) 1 190-9C21 2 Each

8. Relief V alve
**22 psig (1.5 bar/152 kPa) 6913-9069 5 Each
230 psig (16 bar/1586 kPa) 6913-9070 5 Each

9. Valve Repair Kit 1750-9C35 3 Each

10. Elbow, Male, Brass 45
1 1. Connector, Lake, Brass, 3/8 in. ODT -comp x 1/4 in. NPT -EXT 4570-1960 2 Each

12. Tube, P.B./Economizer Line GL45-9C20 2 Each

14. Elbow, Male, 3/8 in. NPT x 1/4 in. NPT 45° 6814-9241 2 Each

° 3/8 in. ODT-comp x 1/4 in. 6814-9233 2 Each

End Fittings for Hand Valves

15.

-

USE (CGA 540)-oxygen 7114-0163 5 Each

-

USE (CGA 580)-argon/nitrogen 7114-0164 5 Each

-

USE (CGA 320)-carbon dioxide 71 14-0181 5 Each

-

USE (CGA 326)-nitrous oxide 71 14-0195 5 Each

16.

-

LIQUID (CGA 440)-oxygen 6514-8992 5 Each

-

LIQUID (CGA 295)-argon/nitrogen 7355-4712 5 Each

-

LIQUID (CGA 320)-carbon dioxide 71 14-0181 10 Each

-

LIQUID (CGA 326)-nitrous oxide 71 14-0195 10 Each

17.

-

VENT (CGA 440)-oxygen 6514-8992 5 Each

-

VENT (CGA 295)-argon/nitrogen 7355-4712 5 Each

-

VENT (CGA 295)-carbon dioxide 7355-4712 5 Each

-

VENT (CGA 295)-nitrous oxide 7355-4712 5 Each
* Decal, Warning 1700-9C07 4 Each
* Decal, Nitrogen GL55-9C51 A/R
* Decal, Oxygen GL55-9C52 A/R
* Decal, Argon GL55-9C53 A/R
* Decal, UN Number, Nitrogen GL55-9C63 A/R
* Decal, UN Number, Oxygen GL55-9C64 A/R
* Decal, UN Number, Argon GL55-9C65 A/R

* Not illustrated.
** Optional/Not Illustrated.