Crane CRYOFLO T-Globe User manual
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Table of Contents
TABLE OF CONTENTS
SECTION A General Valve Installation, Operation, & MaintenanceInformation
SECTION B Hydrogen Service Valves
SECTION C Bel l ow Sea l T-Globe Valves
SECTION D Bel l ow Sea l Y-Globe Valves
SECTION M Appendix on BoltingTorques
SECTION N Appendix on Long Term Storage
SECTION O Appendix on ValveInstallation
SECTION P Appendix on Gasket Maintenance andValve Lubrication
SECTION Q Gear and Motor Operated Valves
i
The operator of any valve should have an understanding of the effects of opening/closing thevalve with regards
to its role in the overall piping system. Operators of valves under pressure should take caution to ensure that
the valve is in good operating condition prior to operating it under pressure.
All cryogenic liquids are extremely cold. Cryogenic liquids and their vapours can rapidly freeze human tissue.
Use appropriate personal safety equipment while operating the valve.
Certain processes utilize flammable, caustic and/or otherwise unstable media. Care should be taken in these
circumstances to ensure the operator is aware of the specific health and safety risks associated with that media.
All piping systems should contain independent support mechanisms and should not utilize the valve as a sole means of
support.
The estimated total lifespan of a CRYOFLO valve when installed within ideal boundary conditions is 5years or 3000 cycle
whichever is minimum.
All valve actuators shall be sized by referring to the specific relevant valve torque and thrust data published by CRYOFLO
Valves. Generic or standard valve information shall not be used.
It is the ultimate responsibility of the piping designer to ensure that each valve is specified appropriately for the given
system parameters. This includes, but is not limited to: pressure, temperature, flow rate, velocity, pressure drop, and
material compatibility with process media. Additionally, it is the responsibility of the piping designer to ensure that the
corresponding actuator sizing data is correct for the given application.
During throttling application, do not operate the globe valve continuously at less than 10% open.
All valves shall only be used within their defined boundary conditions. All standard materials of construction, including
bolting are suitable for operation within the boundary conditions listed in section 8.0 of this document. Care should be
taken to ensure that all valves are not operated at conditions that exceed or deviate from the defined boundary
conditions. The boundary conditions must be adhered to regardless of the piping system status, including but not limited
to: Start-up, hydro-testing, chemical cleaning, system flushing, etc.
Care should be taken around all valves as injury or damage may occur from the leakage of cryogenic fluid.
It is the responsibility of the user/owner of a plant to ensure that all valve operators are ordered to meet all applicable
requirements and specifications.
Only valves that have been certified as fire safe shall be used in piping systems that may be exposed to fire.
When operating manual valves, gloves should be worn to minimize the risk of injury to the hands. Operators shall wear
the appropriate PPE when working with such media.
In situations where manual valves are difficult to operate due to substantial torque requirements, it is recommended that
the valve be supplied with a gear or motor operator.
All valves should be mounted with the stem vertical or 45 °inclined to the pipeline horizontal.
Depending upon the specific application, normal lubricants shall not be used for cryogenic temperature. In this case
cryogenic temperature lubricants shall be used in place of the standard type.
Contact CRANE CRYOFLO prior to any changes.
Section A
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General Warnings & Information
Read this Operations and Maintenance Manual before installing, removing, or repairing any Crane CRYOFLO
valves. Failure to do so may result in improper valve function, void of manufacturer’s warranty, bodily harm, or
fatal injury.
All CRYOFLO Valves are designed and manufactured to be installed in applications where no more than 1g of
force in excess of gravity is applied to the valve in any direction. This 1g force can be an effect of Traffic, Wind
or Earthquake. CRYOFLO Valves should not be used in applicationsthat exceed 1g.
When a CRYOFLO valve with an actuator is installed on a trailer/truck, the piping engineer shall ensure that the
actuator is supported properly.
All pip ing system components a re subject to certain levels of erosion and corrosion.As the valve wa l l thickness is the
g ov ern ing variable in ov era l l serv ice life, care should be taken to ensure tha t all valves and related piping components are
of asuitable wa l l thi ckn es s for th e giv en application.Periodic inspections should also be made as valves/components ma y
wear over time.As amin imum, annual inspection of valve b ody and bonnet wall should be performed with calibrated
measu ring devices such as micrometers and/or ultrasonic thickness gauges.Sev ere applications ma y require additional
inspection types and/or frequency.Additionally, valves should be inspected for g en eral signs of component wea r and/or
damage caused by p roc ess media.This may include the removal of insulation and/or jacketing to ensure aproper
inspection.All valves should also be cycled completely during these inspections to ensure proper operability.Care should
be taken to ensure that this will not affect the operating system.
All CRYOFLO valves are designed for operation in clean media. These media should be free of all debris and particulate
matter. Debris in the media may cause damage and/or reduced performance to the valve.
The style, size, pressure class and material selection of all valves is th e responsibility of th e piping system designer.
CRYOFLO Valves may offer sugg es ti on s in th is area, h owev er th e selection p roc es s is solely the responsibility of plant
designers.Plant designers should also take into account the sp ec ific effects that the p roc es s med ia will have on the valve
wall thickness and corresponding service life and ensure that the sel ec ted material is compatible with the p roc es s med ia .
See Table 1for wa l l thickness.It is also th e responsibility of the piping designer to ensure that va l ves are eq uipp ed wi th
any necessary venting.
Do not exceed 100% of the maximum pressure rating of the valve at any time during its operation. Pressure spikes
beyond the valve’s pressure rating are solely the responsibility of the user. Doing so may result in improper valve
function, void of manufacturer’s warranty, bodily harm, or fatal injury.
When operating any valve, operator shall keep safe distance from moving parts such as the stem.
All Handwheel operated CRYOFLO valves are designed for hand input. Do not apply excessive input torque via pipe
wrenches “cheater bars” or other devices can damage seat or other internal parts of valve.
Motor operated valves should be left in their factory set condition, unless the system operating parameters dictate a
change. If changes are necessary, they should be performed in small increments and then the valve operation inspected.
When adjusting these settings, use only the lightest/lowest setting possible to achieve the desired performance. Excess
torque and/or thrust in the motor settings may damage or lockup the valve.
Never remove a motor operator, gear operator or manual operating assembly from a valve while it is pressurized. The
valve must be completely relieved of all pressure prior to this disassembly.
Care should be taken to ensure that electrical motors are wired correctly to the power source. Incorrect phasing of
wiring may cause valve/motor damage.
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WARNINGS
General Warnings & Information
Section A
Continuous throttling at less than 10% open may cause excessive vibration, noise, wear and damage to discs
and seats.
Continuous throttling at less than 10% open may cause excessive vibration, noise, wear and damage to discs
and seats.
T-Globe Valves. Globe valves are designed to close off, open up or throttle the flow in a pipeline. The disc is designed to
completely stop flow and form a tight seal with pressure under the disc. In the 10% open position to full open position, globe
valves are effective in throttling line pressure.
Y-Globe Valves. Y-Globe valves are designed to close off, open up or throttle the flow in a pipeline. The disc is designed to
completely stop flow and form a tight seal with pressure under the disc. In the 10% open position to full open position, globe
valves are effective in throttling line pressure.
This manual covers CRYOFLO T-G lob e, Y-Globe, and Lift-Check valves. These valves are designed within the limits of ANSI
B16.34 & MSS SP 134. For the operator and mounting topworks of these valves, the user is referred to the applicable appendix
in this manual. See Section 5.0 for operation of valves. This manual is for reference purposes only. Disassembly and maintenance
of valves should only be performed by qualified personnel. Consult CRYOFLO Valves for specific technical support.
Stop and Lift-Check Valves. Lift check valves and stop check valves are designed to be opened by the flow of system
pressure in one direction and close automatically when the system flows in the opposite direction.
2.0 DESCRIPTION
1.0 THEORY OF OPERATION
Section A
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General Warnings & Information
Do not disassemble or modify a CRYOFLO valve in any way prior to installation. This will void the factory
warranty if it occurs.
Do not lift any valve by the handwheel or stem. Use lifting lugs or straps around the valve body. Doing so may
cause damage to the valve.
The temperature of the valve body should not exceed 200°F during welding to void damaging the soft seals.
Ensure that all foreign material (dirt, weld slag, etc.) has been removed from the valve & pipeline prior to and
after installation. Foreign material is the primary cause of premature seat failures.
3.0 INSTALLATION
When unpacking, care should be exercised in lifting and handling to avoid damage to valves or injury to personnel. For specific
installation information, please refer to section “O” of this manual.
When installing, ensure that all foreign material is removed from the interior of the valve, including desiccants. Do not remove
protective end coverings until immediately prior to valve installation.
Check the temperature of surrounding areas to avoid heating valve body excessively, especially with small sizes, where heat sink
may be necessary.
Use the smallest electrodes and the minimum amperage possible consistent with approved welding procedures. This will help to
minimize warpage in the seat areas.
All Valve Bodies are Stainless Steel. Therefore, care should be taken not to over-heat Valve Body beyond that required for
normal welding.
When the valve is to be installed in a vacuum jacketed system, care should be taken in the
jacket design to prevent forces on the Bonnet of the Valve caused by differential contraction rates (thermal loads) between the
inner process line and the vacuum jacket. Contact CRYOFLO for assistance.
All CRYOFLO valves are designed to function in a single direction (Globe & check valves, etc.) All markings should be noted on
the valves. Arrows on the valves indicating flow direction should correspond with the system flow direction.
4.0 WARRANTY
All CRYOFLO valves are backed by a full manufacturer’s warranty against defects in materials or workmanship. It should be
noted that any work or modification performed on a CRYOFLO valve must be authorized by CRYOFLO to retain the original
factory warranty.
5.0 OPERATING INSTRUCTIONS
CRYOFLO valves are designed for simplicity and ease of operation. To open a globe valve, turn the handwheel in a
counterclockwise direction; continue turning until interference is felt; at this point, the valve will be fully open. To close the
valve, turn the handwheel in a clockwise direction; continue turning until interference is felt; at this point, the valve will be fu lly
closed.
Lift check valves are designed to be operated by line pressure only. When the upstream line is pressurized, flow will open the
disc. When the upstream line pressure is reduced, or if there is backpressure, the disc will close.
Section A
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General Warnings & Information
6.0 MAINTENANCE
6.1 Preventative Maintenance and Periodic Inspection
It is recommended that periodic inspections be made of all CRYOFLO valves. The frequency of these inspections will vary,
depending upon the severity of service and frequency of operation of the valve. As a minimum, all valves should be checked
quarterly/ around 500 operating cycles to ensure proper operation and discourage the damage compounding effects of leakage
and reduced performance. The following list details the specific valve types and areas requiring inspection and maintenance.
Item to inspect GLOBE CHECK
Check Stem threads for
wear
X
Check for Gland O-ring
leaks
X
Check body/bonnet
joint for leaks
X X
If conditions permit,
operate valve.
X
Inspect all external
connections
X X
Ensure Stem and seal areas
are free from debris X
Check all lubrication points X
Inspect condition of motor
and/or gear
operators (when used)
X
Inspect valve for
obvious damage
X X
Do not disassemble or modify a CRYOFLO valve in any way prior to installation. This will void the factory
warranty if it occurs.
With proper care, the Valve Assembly should require very little maintenance; however, as with all cryogenic equipment,
thorough inspection of the system should be performed periodically to ensure continued, reliable operation.
CRYOFLO does not recommend any type of maintenance activity while the valve is pressurized.
Section A
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General Warnings & Information
7.0 IDENTIFICATION
All CRYOFLO valves are identified with a metal tag that is hung using a stainless-steel wire as not to damage the valve jacket.
The tag is usuallyfound on the body/bonnet joint area, or on the top plate area near the handwheel.
When performing any work, ordering spare parts, or requesting technical support, please refer to this tag. The Serial Number
(1) is the key to proper valve identification.
EXPLANATION OF TAG MARKINGS
1FIG. NO. Figure number identifying valve selections
1SERIAL NO. Unique number identifying a singlevalve
2SIZE Nominal pipe size (NPS) of the valve
3MAWP Maxi mum Al lowable Working Pressure 300psi
4TEMP. RANGE Temperature Range: -424°F to 100°F
5BODY Body ASTM material gradedesignation
6 DISC Di s c or Wedge trim ma terial
7SEAT Sea t Materi al
8STEM Stem Materi al
9 DOM Da te of Ma nufac tur ing
Section A
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General Warnings & Information
Tag Example:
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7.1 Figure number definition for CRYOFLO™Globe & Check valves
CF1H T 3 A Q 1 A HW VST
1
SIZE
2
TYPE
3
MAWP
4
MOC
5
DISC TYPE
6
GASKET
MOC
7
END
CONNNECTION
8
ACTUATION
9
JACKETING
10
SPECI AL
FEATURE
1Size CF0H - 1/2"
CF0Q - 3/4"
CF01 - 1”
CF1Q - 1 1/4”
CF1H - 1 1/2”
CF02 - 2”
CF2H - 2 1/2”
CF03 - 3”
CF04 - 4”
CF05 - 5”
CF06 - 6”
2Va l ve Type T – Bel l ow Sea l T-Globe Valve
Y –BellowSeal Y-Globe Va lve
L – Bel l ow Sea l Li ft Chec k Valve
R – Bel l ow Sea l Angl e Valve
3MAWP 1 - 150 psi
3 - 300 psi
6 – 600 psi
4MOC A - CF8M body, 304ss Disc, 304/304Lpipe
B - CF8M body, 304ss disc, 316/316Lpipe
C - CF8M body, 316/316L disc & pipe
D - CF3M body, 316Lss disc & pipe
5Disc Type Q - PCTFE, Quick opening
L - PCTFE, Li nea r
E - PCTFE, Equal Percent
6Ga s ket Material 1 - Graphite
2 - PTFE
7End Connection A - Pipe Sch.-10
B - Pipe Sch. 5
S - Socket, pipe
R - Socket, tube
C - Custom
8Actua tion Type HW = Handwheel
BS = Bare Stem
A1 to Z9 = Pneumatic Actuators
01 to 99 = Electric Actuators
00 = None (Li ft Check)
9Jacketi ng N - Non-Jacketed
V - Vacuum Jacketed, Insulated for H2
J - Vacuum jacket parts provided
Section A General Warnings & Information
10 Speci al Feature ST - Manufacturer standard bonnet length, non-cold box
S2 - Manufacturer standard bonnet length, non-coldbox, O2Clean
TW - Compl ete Top Works Cartridge Replacement
SG - Soft Goods Kit (Packing, Gaskets, Seals)
CB - Cold Box Cuff
AM - Actuator Mounting Kit
CL - Custombonnet length,length included in extended description.
XX - Special or multiplecustomrequirements,included inextended Description.
MC - Cold box, non-O2 Clean
M2 - Cold box, O2 Clean
7.2 The following chart denotes the appropriate maintenance manual section for a given valve figure number/style. Please note
that the sections listed are the specialized sections only and pertinent general valve information is contained in other sections of
this manual. Please refer to table of contents for total listings.
BELLOW SEAL GLOBE VALVE MANUAL
SECTION
MAWP300PSI BELLOW SEAL T-GLOBE VALVE C
MAWP300PSI BELLOW SEAL Y-GLOBE VALVE D
Section A
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General Warnings & Information
8.0 BOUNDARY CONDITIONS
The following chart denotes the defined boundary conditions for all CRYOFLO valve products.
Boundary Conditions Bellow Seal T&Y Globe Valve
Scope of product: 1/2”through 6”MAWP 300psi
Servi ce fl uid: •LIN, LOX, LAR, LH2 and LNG.
•No suspendedsolid material greater than100 mi crons
Servi ce Li fe:
5 years or 3000 Operation Cycle. Can extend s ervice life 2-3 foldby replacing
Cartridge Assembly.
Normal maintenance parts such as seals, gaskets andparts that move
rel a tive to ea ch other e.g. s eats & s tems.
Al l owable pressure a nd temperature: 300 psi, Tempera ture range -253°Cto 100°C (-423°F to 212°F)
Materi als for pressurized parts:
Only materials approved under PMA by Acc r edi ted Notified Body ma y be
us ed. See a pproved CE materials list. Appropria te ma teri al for s er vi c e
conditions to be based upon the following criteria:
1. The des i gn pressure andtemperature
2. An acceptable s ervi c e life consis tent wi th the corrosion ra te of the
ma teri al atdes ign conditions.
3. Expected operating condi ti ons within the defined pr essure cycl es,
thermal cycles a nd flow velocity limits.
Packing andgasket materials To be compatible withexpected operating conditions and fluid media
Method of operation: •Globe: Handwheel, pneumaticActuator, Electrical Actuator
•Check: s el f-actuation
Frequency of operation: •Gl obe va lves: not to exc eed 20 ti mes per week or 1000 per year
•Check: N/A
Installationorientation:
•Gl obe: Va l ve neck vertical up to 45°inclined from vertical axis.
•Check: Flow horizontal in a horizontal pipe run; Valveneck vertical up
to 30°inclined from vertical axis.
Flow velocity:
•To keep noise and erosion at or below
rea s ona bl e l evel s , valves are not to be
used for throttling service, and velocity
is not to exceed the values shown in
tabl e to ri ght.
•Check valves should operate at or above
the velocity indicated to stabilizethe disc
and avoid premature wea r.
Maximum flow velocity for Globe valves:
T-gl obe = 180 �
ft/sec or 50 ft/s ec, whi chever i s l owes t.
Y-gl obe = 200 �
ft/sec or 50 ft/sec whi chever i s l owes t.
Where �
= Specific volume of flowingmedium in ft3/lb.
Hydros tatic test: 1.5 times of MAWP 300psifor thebody material
Pipe & support reactions: All reaction loads transmitted through valve ends. Cross sectionandMoment of
Inertia of valveends to be greater than that of theconnecting pipe.
External fire capability: Not s ui table for sustained external heat source greater than 193°C (380 °F).
Wind and Earthquakerating: 1 g load in any direction.
Vent method: NPT Connection provided.
Section A
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General Warnings & Information
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Do not permit smoking or open flames in any area where liquid/gases hydrogen is stored or handled.
Perform inspection of internal cavities of component for any erosion due to service. Which may result in
failure due to hydrogen embrittlement. If observed, replace existing component with brand new component.
1.1 The intent of this section is to detail specific issues regarding H2 Service Valves
For general information regarding this or any other valve please refer to section “A” of this manual.
Hydrogen Service Valves Section B
1.0 GENERAL INFORMATION
1.2 H2 valves areavailable in T & Y Globe configurations. Please refer to the appropriate section of this manual for specific
information (Sections B &C).
All cryogenic liquids are extremely cold. Cryogenic liquids and their vapors can rapidly freeze human tissue and
can cause many common materials such as carbon steel, rubber, and plastics to become brittle or even break
under stress. Cryogenic liquids in containers and piping at temperatures or below the boiling point of liquefied
air [–318°F (–194°C)] can condense the surrounding air and can cause a localized oxygen enriched atmosphere.
Extremely cold cryogens such as hydrogen and helium have the ability to freeze or solidify the surrounding air.
2.0 Maintenance
•H2 gas is extremely Flammable. Follow all industry, local and internal safety procedures when dealing with
any valve or valve part that is intended for H2 service.
•Before performing any work and/or disassembling any valve, ensure that all pressure has been removed from
the line and from any cavities within the valve. Contact CRYOFLO before disassembling any valve.
•Avoid performing any maintenance activity while valve at cryogenic temperature.
•Prior to commencing with any internal work on H2 service valves, ensure that the entire valve has been
properly neutralized.
2.1 Personnel must be thoroughly familiar with the properties and safety considerations before being allowed to handle an H2
cryogenic liquid and its associated equipment.
2.2 Visually examine theentire valve, looking for any difference from the last examination. Make sure all bolted fasteners are in
place and secure. Be sure the Hydrogen leakage indicating paint/tape shows no signs of discoloration.
2.3 As with any mechanical device, it is desirable to operate the valve at some regular frequency to keep moving parts free and
operable. The frequency of operation depends on the condition of the system but should generally be not less than once a
month or when system parameters allow.
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Hydrogen Service Valves
Section B
2.4 On valves that are operated frequently (generally morethan once per day), the Bonnet & handwheel threads should be
examined regularly for signs of wear. Bonnet & handwheel threads on all CRYOFLO H2 gas valves are of the "ACME" thread
form, which means that the top (or crest) of a new thread will have a flat surface. On a worn thread the flat surface tendsto
become pointed (knife edged) as the thread wears. Stems having sharply pointed or edged threads should be replaced.
2.5 Valves should be lubricated as necessary to maintain lubrication in the required areas. This includes the Bonnet &
Handwheel threads. As a minimum, these points should be inspected and/or lubricated every 3 months.
2.6 Bonnet bolts are stressed during assembly at the factory, to the proper level to prevent leakage under any operating
conditions within the valve rating. However, where conditions of extreme temperature fluctuations, heavy mechanical cycles or
excessive vibration are present, retightening of the bonnet bolts may be necessary. If bolt tightening is necessary, please refer to
section “M” of this manual.
2.7 Other threaded parts that should be checked regularly include the handwheel nut and Handwheel Stud. The handwheel nut
is especially important when the valve is mounted with the stem in a non- vertical orientation, because a missing handwheel nut
could result in the handwheel falling from the valve.
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Caution should be exercised in handling the new Bonnet joint gasket (18), O-Ring (19) and gland seal O-Rin g
(24, 25) to avoid scratching its surfaces. Scratches in soft seal components may lead to valve leakage after
reassembly.
Before disassembling any valve, ensure that all pressure has been removed from the line and from any cavities
within the valve. Contact CRYOFLO valves prior to disassembling any valve.
T-Globe Installation, Operation & Maintenance
Section C
BELLOW SEAL T-GLOBE VALVES
For general operation & maintenance information regarding this or any other CRYOFLO valve please refer to section “A” of this
manual.
1.0 GENERAL INFORMATION
2.0 COMPLETE DISASSEMBLY
2.1 Handwheel Operated Valves
Upon completion of the disassembly procedure listed below, the handwheel (30) may be separated from the Bonnet (20), by
removing the handwheel nut (31).
2.2 Actuator Operated Valves
Refer to section “Q” of this manual for actuator mounting assembly and disassembly information.
2.3 The following page contains a general disassembly and reassembly procedure. These procedures cover the bulk of the
disassembly and reassembly process, however special attention should be paid to the following:
2.3.1 Extreme care should be taken to ensure that the sealing surfaces of the gasket area do not become damaged
during disassembly or reassembly. This includes scratches caused by misalignment and/or by debris in the seal
area.
2.3.2 CRYOFLO recommends replacing the Bonnet joint gasket (18), O-Ring (19) and gland seal O-Ring (24, 25)
when servicing any valve.
2.3.3 Caution should be exercised in handling the new Bonnet joint gasket (18), O-Ring (19) and gland seal O-Ring
(24, 25) to avoid scratching its surfaces.
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T-Globe: Part Identification Section C
PART IDENTIFICATION
1BODY
2BODY STUB PIPE
3TOP PIPE FLANGE
4BODY NECK PIPE
5DISC
6SEAT
7SEAT RETAINER
8SEAT CLAMPING SCREW
9DISC NUT
10 SPLIT RING
11 LOWER STEM
12 PTFE SLEEVE
13 METAL BELLOWS
14 BELLOWS BOTTOM RING
15 ANTI ROTATION DEVICE
16 BELLOWS TOP RING
17 SLEEVE HOLDER
18 SPIRAL WOUND GASKET
19 O-RING
20 BONNET
21 UPPER STEM
22 SOCKET HEAD CAP SCREW
23 LOCK WASHER
24 O-RING
25 O-RING
26 GLAND BUSHING
27 HANDWHEEL BUSH
28 SNAP RING
29 HANDWHEEL STUD
30 HANDWHEEL
31 HANDWHEEL NYLON NUT
32 WASHER
33 STRAIGHT FITTING (VENT HOLE)
34 HANDWHEEL SLEEVE
35 GRUB SCREW
36 SNAP RING
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DISASSEMBLY
Read the warning notice listed in section 2.0 of these instructions.
1. Loosen Socket Head Cap Screw (22) and remove Bonnet Sub-Assembly (19+20+24+25+26+28). Follow below steps to
dismantle the Bonnet Sub-Assembly.
I. Remove Bonnet Face O-Ring (19) and store in a clean area until ready to reassemble.
II. Remove Snap Ring (28) and Gland Bush (26).
III. Remove gland O-Rings (24 & 25); store in a clean area until ready to reassemble.
2. Remove Upper Stem Sub-Assembly (21+29).
3. Pull out Cartridge Sub-Assembly (5+6+7+8+9+10+11+12+13+14+15+16+17+36) from body. Follow below steps to
dismantle the Cartridge Sub-Assembly:
I. Remove Snap Ring (36) and dismantle Disc Nut (9) and Split Ring (10) from Disc (5). Separate Disc Sub-Assembly
and ‘Stem, Bellows, and Sleeve Holder Weld-Assembly’.
II. Follow below steps to dismantle Disc Sub-Assembly (5+6+7+8) .
i. Loosen Seat Clamping Screw (8) and Seat Retainer (7).
ii. Remove Seat (6) from Disc (5).
4. Remove PTFE Sleeve (12) from ‘Stem, Bellows, and Sleeve Holder Weld-Assembly’.
5. Remove Spiral Wound Gasket (18) from Bonnet. Never re-use a spiral wound gasket.
Disassembly & Reassembly
Section C
RE-ASSEMBLY
1. Clean all parts thoroughly. Clean gasket seating surface in the Body and Bonnet with fine emery cloth and isopropyl
alcohol. Replace Spiral Wound Gasket (18) with a new factory supplied part.
2. Prepare Disc Sub-Assembly (5+6+7+8) per below steps:
I. Insert Seat (6) on Disc (5).
II. Tighten Seat Retainer (7) on Disc (5) by applying toque mention in Section-M.
III. Tighten the Seat Clamping Screw (8) on Disc (5) to secure Seat (6) and Seat Retainer (7).
IV. Apply a very thin film of Halocarbon 25-5S or Krytox®1Grease to the O-Ring (19) and place in Bonnet groove.
3. Prepare Bonnet Sub Assembly (19+20+24+25+26+28) per below steps:
I. Insert O-Rings (24 & 25) in Gland Bushing (26) groove.
II. Insert Gland Bushing (26) with O-rings into Bonnet (20).
4. Insert Snap Ring (28) in Bonnet groove to prevent Gland Bushing’s axial movement.
5. Insert PTFE sleeve (12) onto ‘Stem, Bellows, and Sleeve Holder Weld-Assembly’.
6. Slide Snap Ring (36) and DiscNut (9) on Lower Stem(11). Insert Split Ring halves (10) on Stem groove. Slide Disc Nut (9)
over Split Rings (10) and insert entire sub-assembly into disc bore. Compress Snap Ring (36) into disc groove.
7. Insert Spiral Wound Gasket (18 ) into Top Pipe Flange groove.
8. Insert Cartridge Sub-Assembly (5+6+7+8+9+10+11+12+13+14+15+16+17+36) slowly from the top into the body.
9. Slide up Upper Stem Sub-Assembly (21+29) onto stem groove.
10. Assemble Bonnet Sub-Assembly by aligning Bonnet hole with threaded hole on Top Pipe Flange (5).
11. Apply appropriate lubricant on Socket Head Cap Screw (22) thread. Insert Lock Washer (23) on screw and tighten all
Socket Head Cap Screws by following crisscross pattern and applying torque mention in Section-M.
12. Reassemble the Handwheel(30) on Bonnet (20) by applying the Handwheel Nut (31).
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For general operation & maintenance information regarding this or any other CRYOFLO valve please refer to section “A” of this
manual.
3.0 MAINTENANCE OF DISASSEMBLED VALVES
3.1 Following the above listed disassembly procedures, examine the Body (1) cavity for deposits of foreign material.
3.2 Examine seating surfaces of in Body (1) and Seat (6) for wear.
3.3 Examine Bonnet (20), seal area, and threads for excessive wear.
3.4 If excessive wear is evident, worn parts (or if necessary, the entire valve) should be reconditioned or replaced
3.5 CRYOFLO offers complete replacement seal kits and spare parts for reconditioning. When ordering, always state the figure
number (or stock number) of the valve and the body material.
3.6 CRYOFLO offers complete remanufacturing services to rework your valve. If you find this necessary, our nationwide
network of Crane Valve Service Centers will remanufacture your valve to factory specifications.
1. Cartridge Sub-Assembly (5+6+7+8+9+10+11+12+13+14+15+16+17+36) and Sealing Components Gasket and O-rings
(18+19+24+25).
I. Follow Disassembly process mentioned above and replace Cartridge Assembly all part and perform reassembly of
Valve.
2. Gland O-Ring Replacement
I. Read the warning notice listed in section 2.0 of these instructions.
II. Loosen Bonnet joint socket head cap screw (22) and remove Bonnet Sub-Assembly (19+20+24+25+26+28).
Follow below step to dismantle Bonnet sub assembly.
III. Remove Bonnet Face O-Ring (19) and store in a clean area until ready to reassemble.
IV. Remove Snap Ring (28) and pull-out gland Sleeve (26).
V. Remove Gland O-Rings(24 & 25) and replace them with new O-Rings and reassemble valve in reverse order.
3. Bonnet O-Ring Replacement
I. Read the warning notice listed in section 2.0 of these instructions.
II. Loosen Bonnet joint socket head cap screw (22) and remove Bonnet Sub-Assembly (19+20+24+25+26+28).
III. Remove Bonnet Face O-Ring (19) and replace with new O-Ring and reassemble valve in reverse order.
4. Gasket Replacement
I. Read the warning notice listed in section 2.0 of these instructions.
II. Loosen Bonnet joint socket head cap screw (22) and remove Bonnet Sub-Assembly (19+20+24+25+26+28).
III. Remove upper stem sub assembly (21+29).
IV. Pull out entire Cartridge Sub-Assembly (5+6+7+8+9+10+11+12+13+14+15+16+17+36) from Body.
V. Remove Spiral Wound Gasket (18), replace with new Spiral Wound Gasket and reassemble valve in reverse order.
5. PCTFE seat replacement
I. Read the warning notice listed in section 2.0 of these instructions.
II. Loosen Bonnet joint socket head cap screw (22) and remove Bonnet Sub-Assembly (19+20+24+25+26+28).
Follow below step to dismantle Bonnet Sub-Assembly.
i. Remove upper stem sub assembly (21+29).
ii. Pull out entire Cartridge Sub-Assembly (5+6+7+8+9+10+11+12+13+14+15+16+17+36) from Body.
Follow the below step to dismantle cartridge assembly.
iii. Remove Snap Ring (36) and dismantle Disc Nut (9) and Split Ring (10) from Disc (5). Separate Disc Sub-
Assembly and ‘Stem, Bellows, and Sleeve Holder Weld-Assembly’.
III. Follow below steps to dismantle Disc Sub-Assembly.
i. Loosen Seat Clamping Screw (8) and Seat Retainer (7).
ii. Remove Seat (6) from Disc (5) and replace with New Seat.
iii. Reassemble valve in reverse order.
4.0 SPARE PART REPLACEMENT
Spare Part Replacement Section C
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Spare Part Replacement
Section C
5.1 Parts requiring lubrication are Bonnet and Handwheel both threads (20,34), All Bonnet Screw (22) should be lubricated with
an anti-seize lubricant to promote ease of future disassembly.
5.0 LUBRICATION
6.1 Recommended bolting torques are shown in section “M” of this manual.
6.2 Special tool needed to tighten seat retainer.
a. Contact Crane CRYOFLO to purchase seat retainer tool
6.3 No special tools are required for general valve maintenance. However, in certain large valve styles, the use of a hydraulic
torque device may be necessary to achieve optimum bolt torque.
6.0 SPECIAL TOOLS AND INSTRUCTIONS
7.1 Refer to section “A” of this manual for general valve maintenance information
7.0 PREVENTATIVE MAINTENANCE
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