Crane Class 150 User manual

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Pacific Valves
Operation and Maintenance Manual
Pressure Seal
Pacific Valves, 3201 Walnut Ave., Signal Hill, CA. 90755
PH. (562 426-2531
Fax. [phone]
cranecpe.com
CRANE Pacific Pressure Seal
ChemPharma & Energy
GP-02-IOMPS, Rev 5

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cranecpe.com
Revisions
REV
ECO
DESCRIP
ION
PREP
ARED
BY
DA E
ENGINEERING
O HER
1 18353
19684 INITIAL RELEASE Jerry Martin 10-16-2012 S. Sturtevant
2 19884
CHANGED ALL REASSEMBLY SECTIONS
STATEMENT ABOUT DRAW STUD TORQUE
TO WRENCH TIGHT
Jerry Martin 11-8-2012 S. Sturtevant
3 27317 ADDED SWING CHECK VALVE
INSTALLATION DETAILS Hiral Joshi 9-22-2014 S. Kulkarni
4 37506 REMOVED WEDGE PLUG &
BOLTED BONNET DETAILS Pankaj Nikam 07-12-2017 S. Kulkarni
5
37937 TILT DISC EXPLODED VIEW
ADDED & DISC ASSEMBLY
INSTRUCTION ELABORATED
Pankaj Nikam 08-23-2017 S. Kulkarni

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able of Contents
Section Page
•SECTION A: Warnings 4
•SECTION B: Pressure Seal Gate Valve 13
•SECTION C: Pressure Seal Parallel Disc Gate Valves 17
•SECTION C1: Pressure Seal Belt Eye Gate Valve 21
•SECTION D: Pressure Seal Globe Valves 25
•SECTION E: Pressure Seal Y-Globe Valves 29
•SECTION F: Pressure Seal Check Valves 33
•Appendix 1 : Bolt Torques 38
•Appendix 2 : Long Term Storage 41
•Appendix 3 : Valve Installation 43
•Appendix 4 : Packing, Gasket &Valve Lubrication 47
•Appendix 5 : Wedge Fitting in Gate Valves 52
•Appendix 6 : Fabricated Yoke Assemblies 55
•Appendix 7 : Gear & Motor Actuators 57

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Section A: Warnings
•All Pacific 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. Pacific Valves should not be used in applications that exceed 1g.
•All piping system components are subject to certain levels of erosion and corrosion. As the valve
wall thickness is the governing variable in overall service life, care should be taken to ensure that all
valves and related piping components are of a suitable wall thickness for the given application.
Periodic inspections should also be made as valves/components may wear over time. As a
minimum, annual inspection of valve body and bonnet wall should be performed with calibrated
measuring devices such as micrometers and/or ultrasonic thickness gauges. Severe applications
may require additional inspection types and/or frequency. Additionally, valves should be inspected
for general signs of component wear and/or damage caused by process media, i.e. steam cutting.
This may include the removal of insulation and/or other coverings to ensure a proper 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.
•With the exception of the Wedgeplug, all Pacific 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 the responsibility of the piping
system designer. Pacific Valves may offer suggestions in this area, however the selection process is
solely the responsibility of plant designers. Plant designers should also take into account the specific
effects that the process media will have on the valve wall thickness and corresponding service life
and ensure that the selected material is compatible with the process media. This material selection
should be based on reputable corrosion resistance data and used in conjunction with the valve’s
corrosion allowance in order to maintain the minimum wall thickness. See Table 1 for wall thickness
and corrosion allowance data. It is also the responsibility of the piping designer to ensure that valves
are equipped with any necessary venting and/or draining capabilities.
•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.
•When operating any valve stand clear of any moving parts such as the stem and/or disc assembly.
•All manually operated Pacific valves are designed for hand input. Do not apply excessive input
torque via pipe wrenches “cheater bars” or other devices.
•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 3-phase wiring may cause valve/motor damage.
•Motorized Parallel disc gate valves are position seated and should never be torque seated. Do not
use the motor torque settings to seat the valve.
•The operator of any valve should have an understanding of the effects of opening/closing the valve
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.
•Certain valve applications take place at elevated temperatures. Care should be taken in these
instances to ensure that an operator does not touch any portion of the valve other than the

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handwheel. In severe temperature applications (300 degrees F and above , insulation may be
required on the valves to protect operators from the heat.
•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 medium.
•All Pacific valves should be operated within the pressure and temperature ranges listed in Table 2 of
ANSI B16.34. Under no circumstances should the valves be operated at conditions outside these
tables.
•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 Pacific valve when installed within ideal boundary conditions is 20
years.
•All valve actuators shall be sized by referring to the specific relevant valve torque and thrust data
published by Pacific 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 sized appropriately
for the given system parameters of pressure, temperature, flow rate, velocity, pressure drop, etc.
Additionally it is the responsibility of the piping designer to ensure that the corresponding actuator
sizing data is correct for the given application.
•Valves other than globes should not be used for throttling applications. Severe damage may occur to
other valve styles. When using globe valves for throttling, do not operate the 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.
•Valves are not suitable to serve as block valves during system hydrostatic pressure tests that
exceed 1.1 times the cold working pressure.
•Care should be taken around all valves as injury or damage may occur from the leakage of hot, high
pressure and/or caustic materials from a gasket and/or packing joint. Additionally, packing and/or
gasket leaks may cause external corrosion damage to the valve.
•When possible, gate valves should be relieved of maximum seating force when left in the closed
position. By relieving this force, it may help prevent damage caused by excessive thermal stem
expansion. Care should be taken however to ensure that the valve is not opened, only that the
torque/thrust has been removed from the stem.
•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.
•Standard graphitic packing is suitable for 500ppm VOC emissions. Consult the factory if lower
emissions are required. Crane Pacific meets API-622 / Method 21 emissions standards.
•When operating manual valves, gloves should be worn to minimize the risk of injury to the hands.
•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 and the pipeline horizontal. Check valves may
be installed in vertical pipelines only when the normal flow is in the upward direction. For any other
orientation, please contact the factory.
•Depending upon the specific application, normal lubricants may not be sufficient for higher
temperature applications. In this case, higher temperature lubricants should be used in place of the
standard type.

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• All valve packing glands should be tightened in an even manner. Care should be taken to ensure
that the packing gland and/or gland flange do not contact the valve stem or stuffing box during
tightening.
1. THEORY OF OPERATION
Gate Valves: Gate valves are designed to close off or open up the flow in a pipeline. The wedge is
designed to completely stop flow and form a tight seal against pressure in either direction. In the
open position, the wedge is completely out of the flow stream. Gate valves are not recommended
for throttling use.
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.
NOTE: Continuous throttling at less than 10% open may cause excessive vibration, noise, wear and
damage to discs and seats.
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.
These valves typically offer better flow characteristics than standard globe valves.
NOTE: Continuous throttling at less than 10% open may cause excessive vibration, noise, wear and
damage to discs and seats.
The Y-Globe is also available in a stop-check configuration. Stop check valves (sometimes called
non-return 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. In addition, stop check valves
can throttle the flow in the open direction or close the flow off completely.
Size Class 150 Class 300 Class 600 Class 800 Class 900 Class 1500 Class 2500 Size Bolted Bonnet Wedgeplug
Pressure
Seal
Compact
Pattern
0.5 0.11 0.11 0.13 0.14 0.16 0.19 0.25 0.5 0.12 0.12
0.75 0.12 0.12 0.13 0.14 0.18 0.23 0.29 0.75 0.12 0.12
10.16 0.17 0.18 0.21 0.22 0.26 0.35 10.12 0.14
1.25 0.19 0.19 0.19 0.24 0.25 0.31 0.44 1.25 0.12 0.15
1.5 0.19 0.19 0.21 0.27 0.29 0.38 0.50 1.5 0.06 0.12 0.17
2 0.22 0.25 0.25 0.29 0.31 0.44 0.62 2 0.12 0.12 0.11 0.21
2.5 0.22 0.25 0.28 0.34 0.50 0.75 2.5 0.16 0.19 0.12
3 0.22 0.28 0.31 0.41 0.62 0.88 3 0.19 0.19 0.13
4 0.25 0.31 0.38 0.50 0.75 1.09 4 0.19 0.19 0.14
6 0.28 0.38 0.50 0.72 1.09 1.59 6 0.19 0.19 0.14
8 0.31 0.44 0.63 0.88 1.41 2.06 8 0.19 0.19 0.14
10 0.34 0.50 0.75 1.06 1.72 2.59 10 0.22 0.22 0.16
12 0.38 0.56 0.90 1.25 2.00 3.03 12 0.25 0.25 0.17
14 0.41 0.62 0.97 1.38 2.19 3.34 14 0.25 0.25 0.19
16 0.44 0.69 1.09 1.56 2.50 3.81 16 0.25 0.25 0.21
18 0.47 0.75 1.22 1.75 2.81 4.27 18 0.25 0.25 0.24
20 0.50 0.81 1.34 1.91 3.04 4.69 20 0.25 0.25 0.27
24 0.57 0.94 1.59 2.28 3.72 5.63 24 0.24 0.24 0.34
30 0.66 1.14 1.96 30 0.13 0.13
36
0.75
1.31
2.33
36
0.02
All valves will have a wall thickness in the new condition at least equal to the minimum wall thickness plus the corrosion-erosion allowance.
If the wall thickness is reduced to less than the minimum value in the table after usage, the valve must be repaired or replaced.
MINIMUM WALL THICKNESS FOR ALL PRODUCTS BY PRESSURE CLASS CORROSION-EROSION ALLOWANCE FOR ALL
PRESSURE CLASSES BY PRODUCT
Table 1

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Swing Check & ilt Disc Valves: Check valves are designed to open by the system pressure in a
line. The desired direction of flow in the line will open the valve, and any attempt by the flow to
reverse will close the valve completely. The check valve typically does not require any outside force
or signal to operate properly. Check valves allow flow in one direction only
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. Stop check valves (sometimes called non-return valves have the additional
feature of throttling the flow in the open direction or closing the flow off completely.
NOTE: Continuous throttling at less than 10% open may cause excessive vibration, noise, wear and
damage to disc and seat ring.
Pressure Seal Valves: Pressure seal valves use internal line pressure to seal the bonnet joint.
These valves are available in Gate, Globe, Check and Y-Globe configurations.
Parallel Disc Gate Valves: Parallel disc valves utilize a special free-floating disc arrangement to
provide positive shutoff. Unlike standard wedge gates, the parallel disc valve is seated by position
and not input torque. This system uses upstream pressure to affect a positive seal on the
downstream seat; these valves are not for double block and bleed type service.
2. DESCRIPTION
This manual covers all Pacific pressure seal valves. These valves are designed within the limits of
ANSI B16.34. For the operator and mounting top works of these valves, the user is referred to the
applicable appendix in this manual. See Appendix 7 for operation of valves. This manual is for
reference purposes only. Disassembly and maintenance of valves should only be performed by
qualified personnel. Consult Pacific Valves for specific technical support.
For Specific information regarding a particular style of valve, please refer to the corresponding
detailed section.
3. INSTALLATION
When unpacking, care should be exercised in lifting and handling to avoid damage to valves or
injury to personnel. Do not lift any valve by the handwheel or stem. Use lifting lugs or straps around
the valve body. For specific installation information, please refer to Appendix 3 of this manual.
When installing, ensure that all foreign material is removed from the interior of the valve, including
desiccants. Note: Do not remove protective end coverings until immediately prior to valve
installation.
Note: Do not disassemble or modify a Pacific Valve in any way prior to installation. This will void the
factory warranty if it occurs.
When installing weld-end, flex wedge gate or globe valves into the line, it is advisable to have the
valve slightly open to prevent the wedge from becoming "stuck" due to thermal expansion and to
discourage damage to the seating surfaces.
A protective paint has been applied to the weld ends on some valves and it should be removed
before welding.

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For soft-seated valves, the temperature of the valve body should not exceed 200°F during welding to
avoid damaging the soft seals. Check the temperature of surrounding areas to avoid heating valve
body excessively, especially with small sizes, where a 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. Tack welds should be ground out
before completing the root pass in that area.
Valves of carbon steel should be allowed to cool slowly. The valve may be covered with a heat-
insulating blanket to promote slow cooling and limit the heat-affected zone. Appropriate industry
standards should be followed for all PWHT.
Certain valve types are designed to function in a single direction (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.
Note: Ensure that all foreign material (dirt, weld slag, etc. has been removed from the valve prior to
and after installation. Foreign material is the primary cause of premature seat failures.
4. WARRANTY
All Pacific 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 Pacific Valve must be
authorized by Pacific Valves in order to retain the original factory warranty.
5. OPERATING INSTRUCTIONS
Pacific valves are designed for simplicity and ease of operation. To open a gate, globe & stop check
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 fully closed. Note
that Parallel disc valves are not seated by torque. The disc is position seated and will stop when it
contacts the factory set travel limits. Further tightening will not improve the seal and could lead to
valve damage if excessive torque is applied.
Swing, Lift and tilting disc check valves are designed to be operated by line pressure only. When
the upstream line is pressurized, flow will open the disc. When the pressure is reduced upstream, or
if there is backpressure, the disc will close.
With some larger valves under conditions of high pressure, a rim pull of more than 250 lbs. may be
required to achieve proper seating.
CAU ION! - hese valves were designed to operate within the pressure and temperature
limits of ANSI B16.34. Do not exceed these limits.
6. MAINTENANCE
6.1. Preventative Maintenance and Periodic Inspection Pacific Valves recommends that periodic
inspections be made of all 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 to ensure proper operation and discourage the damage compounding effects of
leakage. The following list details the specific valve types and areas requiring inspection and
maintenance.

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Item to i
n
spect
GA E
GLOBE
CHECK
Y
-
GLOBE
S OP CHECK
PARALLEL
DISC GA E
Check Stem threads
for wear
XXX XXX XXX XXX XXX
Check for Packi g
leaks
XXX XXX XXX XXX XXX
Check body/bo et
joi t for leaks,
retighte all bolti g
(a)
XXX XXX XXX XXX XXX XXX
If co ditio s permit,
operate valve.
XXX XXX XXX XXX XXX
I spect all exter al
co ectio s
XXX XXX XXX XXX XXX XXX
E sure Stem a d
seal areas are free
from debris
XXX XXX XXX XXX XXX
Check all
lubricatio poi ts
XXX XXX XXX XXX XXX
I spect co ditio of
motor a d/or gear
operators (whe
used)
XXX XXX XXX XXX XXX
I spect valve for
obvious damage
XXX XXX XXX XXX XXX XXX
Warning! Do not remove or loosen the packing gland or bonnet bolts while the valve is pressurized.
(a The pressure seal draw bolting must be periodically tightened during service to prevent gasket
loosening.
6.2 Maintenance of valve under pressure
If the above listed inspections reveal any indications, the following procedures are recommended:
Note: Extreme care should be taken when working on any pressurized system!
6.2.1 If the stem packing is leaking, the gland nuts on the gland flange should be tightened
uniformly until the leakage stops. If the leakage continues or there is no adjustment remaining,
additional packing must be installed or the packing must be replaced. (See disassembly procedure
for appropriate valve or Packing and Gasket maintenance Appendix 4 It should also be noted that
the valve should be able to operate freely at all times. If the valve cannot operate due to excessive
packing force, the packing has become worn and must be replaced during a system shutdown.
6.2.2 The stem threads that are exposed to atmosphere should be periodically lubricated to reduce
wear, operating torque, and to deter corrosion. Care should be taken to ensure that only the
threaded portion of the stem is lubricated. Pacific Valves does not recommend the practice of

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lubricating the sealing area of the stem. This practice tends to attract debris and foreign material,
which can lead to stem or stuffing box damage.
6.2.3 The yoke sleeve should be lubricated periodically through the grease fitting to ensure smooth
operation. Lubrication should be inspected and revised at each application. Each installation may
have specific requirements/ specifications regarding lubrication.
CAU ION! Do not overstress the bolting. If leakage continues, the gasket should be
replaced. (See the bolting torque Appendix 1 or the appropriate valve disassembly
procedure)
6.2.4 If normal inspection reveals a binding or galling action of valve operating parts, it is advisable
to dismantle and inspect the valve parts during a system shutdown. Contact Pacific Valves
prior to disassembling any valve.
7. IDENTIFICATION
All Pacific Valves are identified with a metal Tag that is riveted to the valve. This tag is usually found
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 (6 , Figure number (11 and Stock number (7 are the keys to proper valve
identification.
EXPLANATION OF TAG MARKINGS
1
SIZE
Nominal pipe size (NPS of the valve
2
BODY
Body ASTM material grade designation
3
S EM
Stem material
4
DISC
Disc or Wedge trim material
5
SEA
Seat trim material
6
SERIAL NO.
Unique number identifying a single valve
7
S OCK NO
Number identifying a group of like valves
8
MAX
°
°°
°
F
Maximum temperature at which the valve may be operated
within the limits of pressure allowed by ASME B16.34,
Table 2.
9
PSI @ 100
°
°°
°
F
Pressure in psig at which the valve is rated to operate when
the temperature does not exceed 100 °F
10
ANSI
B16.34
CLASS
Pressure class rating of the valve as defined in ASME
B16.34 Section 2.
11
FIG. NO.
Number identifying the valve’s main features including
material, class, trim, end connections, and operator type.
See the following sections for classification of Figure
Numbers.
1
2
3
4
5
6
7
8
9
10
11
Signal Hill
Ca, 90755

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he following is the newer figure number system for the pressure seals.

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8. Boundary Conditions
The following charts denote the defined boundary conditions for all Pacific Valve products.
Boundary conditions for Pressure Seal products
Scope of product: 2 ½” through 36” Class 600 through 3500
Service fluid:
•
Water, steam, gas, or hydrocarbo compou ds.
• No suspe ded solid material greater tha 100 micro s
Service Life: 20 years or whe corrosio allowa ce is depleted whichever is less. This excludes
ormal mai te a ce parts such as packi g, seals, gaskets a d parts that move
relative to each other e.g. seats, stems a d bushi gs.
Allowable pressure a d temperature: As Per Table 2 ASME B16.34
Materials for pressurized parts: O ly materials approved u der PMA by Accredited Notified Body may be used.
See approved CE materials list. Appropriate material for service co ditio s to be
based upo the followi g criteria:
1. The desig pressure a d temperature
2. A acceptable service life co siste t with the corrosio rate of the
material at desig co ditio s.
3. Expected operati g co ditio s withi the defi ed pressure cycles,
thermal cycles a d flow velocity limits.
Packi g a d gasket materials To be compatible with expected operati g co ditio s
Corrosio /erosio allowa ce: Varies by valve size a d pressure class. See valve wall thick ess calculatio i
Table 1 of this sectio .
Method of operatio : • Gate and Globe: Handwheel, Manual Gear, Motor Actuator, Air or
Hydraulic cylinder Actuator
• Check: self-actuatio
Freque cy of operatio :
•
Gate a d Globe valves: ot to exceed o ce per week or 50 per year
• Check: N/A
I stallatio orie tatio :
•
Gate a d Globe: Stem vertical up i a horizo tal pipe ru .
• Check: Flow horizo tal i a horizo tal pipe ru or Vertical up i a vertical
pipe ru .
Flow velocity.
• To keep oise a d erosio at or
below reaso able levels, valves
are ot to be used for throttli g
service, a d velocity is ot to
exceed the values show i
table to right.
• Check valves should operate at or
above the velocity i dicated to
stabilize the disc a d avoid
premature wear.
Maximum flow velocity for gate, globe a d check valves
Gate 300 V T-globe 180 V
Y-globe 200 V Check 200 V
Mi imum flow velocity for check valves is 55 V
Where V =Specific volume of flowi g medium
Hydrostatic test: 1.5 times the 100
°
F rati g pressure i ASME B16.34 for the body material
Pressure cycles: U limited cycles < Desig Pressure/3
Thermal cycles: U limited cycles < 30
°
F
Heat up/cool dow rate: Not to exceed 100
°
F per hour for 2000 cycles
Pipe & support reactio s: All reactio loads tra smitted through valve e ds. Cross sectio a d Mome t of
I ertia of valve e ds to be greater tha that of the co ecti g pipe.
Exter al fire capability: Valve seats of sta dard product co tai o plastic or low-temperature materials.
Not suitable for sustai ed exter al heat source greater tha 1500 °F.
Wi d a d Earthquake rati g: 1 g load i a y directio .
Ve t or drai method: No e

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Section B: Pressure Seal Gate Valves

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PRESSURE SEAL GA E VALVES
1. General Information
For general operation & maintenance information regarding this or any other Pacific valve please
refer to section “A” of this manual.
For specific information pertaining to Parallel Disc Gate Valves, please refer to section “C” of this
manual.
For specific information pertaining to the Fabricated Yoke Assembly, please refer to Appendix 6 of
this manual.
2. Complete Disassembly
CAU ION! Before disassembling any valve, ensure that all pressure has been removed from
the line and from any cavities within the valve. Contact Pacific Valves prior to disassembling
any valve.
2.1 Handwheel operated valves
Upon completion of the disassembly procedure listed below, the handwheel 50 may be
separated from the yoke sleeve 31, by removing the handwheel nut 54.
2.2 Gear and motor operated valves
Refer to Appendix 7 of this manual for specific gear and motor 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 Crane requires that the pressure seal bonnet gasket 55 be replaced when servicing
any valve.
2.3.3 Caution should be exercised in handling the new bonnet gasket 55 to avoid
scratching its surfaces.
2.3.4 When reassembling the valve it should be noted that in certain cases it may be
necessary to e-tighten the bonnet draw bolts 16C after the system pressure is built
up. This process will ensure a positive seal for the pressure seal gasket.
For all other bolting, excluding gland studs, torque bolts per Appendix 1.

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PRESSURE
PRESSUREPRESSURE
PRESSURE-
--
-SEAL GATE V
SEAL GATE VSEAL GATE V
SEAL GATE VALVES
ALVESALVES
ALVES
CLASS 600, 900, 1500, 2500
DISASSEMBLY
• Read the warning notice listed in section 2.0 of
these instructions.
• Loosen gland stud nuts 16A. Loosen and
remove bonnet nuts 16C and yoke nuts 16B.
• Install rigging to support weight of the yoke
assembly and the handwheel or actuator if
present.
• Turn the handwheel to closed position. The
yoke and handwheel will back off of the stem
70. Temporarily remove yoke assembly.
• Remove the gland flange 36, gland 35, and all
packing material 46.
• Using a block of wood or similar soft material,
drive the bonnet 30 down until there is sufficient
clearance above the bonnet to remove the
segment rings 124. Care should be taken to
ensure that bonnet does not become cocked
during this process.
• Using a brass bar, tap the top of each segment
ring to loosen, using lubricants as necessary.
Remove the segments by prying, with a
screwdriver or similar tool, out away from the
body until the segments are free to be lifted out.
Clean all surfaces of foreign matter prior to
next step.
• Replace the yoke and turn the handwheel to
open valve. After back seating, continue to raise
the bonnet until the pressure seal gasket 55 is
free. Pull the yoke assembly, bonnet 30 stem
70, and the wedge 71 from the body 10.
• Use extreme caution to not scratch or damage
the seating surfaces of the body, gasket,
bonnet, or wedge. Match mark the wedge to the
body for re-assembly.
• Remove the gasket 55 from the bonnet.
Remove the stem from the bonnet.
• Clean the stuffing box and stem.
54
50
31
20
59
56
128
16A
36
35
98A
16B
120B
16C, 98B
NO SHOWN.
46
124
55
30
70
11
10
71
98
97
120A
16D
PAR IDEN
IFICA ION
10 BODY 54 WHEEL NUT
11 SEAT RING 55 GASKET
16A NUT 56 JAM NUT
16B NUT 59 GREASE FITTING
16C NUT 70 STEM
16D NUT 71 WEDGE
20 BEARINGS 97 STUD
30 BONNET 98 STUD
31 YOKESLEEVE 98A STUD
35 GLAND 98B STUD
36
GLAND FLANGE
120A TOP PLATE
46 PACKING 120B BASE PLATE
50 HANDWHEEL 124 SEGMENT RING
128 YOKE COLUMN
REASSEMBLY
• Clean all parts thoroughly. Polish gasket seating
surface in the body 10 and the bonnet 30 with
fine emery cloth. Lubricate the gasket seating
surfaces with a light oil to prevent galling during
assembly. Replace gasket 55 with a new factory
supplied part.
• Insert the wedge 71 and the stem 70 into the
body 10 following the match marks previously
made.
• Install the gasket 55 onto the bonnet. Insert the
bonnet into the body 10. Install the segment rings
124 into the body groove and backseat the
bonnet to seat the gasket and install the bonnet
bolting. Tighten wrench tight only, do not torque.
• Install the yoke assembly. Install new packing,
and reinstall the gland, gland flange and tighten
the eyebolt nuts.
NOTE: After system pressure has been
reestablished, retighten all bolting in accordance with
this manual.

16 | P a g e
3. Maintenance of disassembled valves
3.1 Following the above listed disassembly procedures, examine the body cavity 10 for deposits
of foreign material.
3.2 Examine seating surfaces of seat rings 11 and wedge 71 for wear.
3.3 Examine stem 70, 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 Crane 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 Crane also offers complete re-manufacturing services to rework your valve. If you find this
necessary, the Crane Valve Service Center will re-manufacture your valve to factory
specifications.
4. Lubrication
4.1 Parts requiring lubrication are stem and yoke sleeve threads 70, 31, entire gasket 55, and
under all nuts 16 before torqueing. Bonnet draw studs should be lubricated with an anti-
seize lubricant to promote ease of future disassembly.
5. Special tools and instructions
5.1 Recommended bolting torques are shown in Appendix 1 of this manual
5.2 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. Preventative maintenance
6.1 Refer to section “A” of this manual for general valve maintenance information.

17 | P a g e
Section C: Pressure Seal Parallel Disc Gate
Valves

18 | P a g e
PRESSURE SEAL PARALLEL DISC GA E VALVES
1.0 General Information
For general operation & maintenance information regarding this or any other Pacific valve please
refer to section “A” of this manual.
For specific information pertaining to the Fabricated Yoke Assembly, please refer to Appendix 6 of
this manual.
2.0 Complete Disassembly
CAU ION! Before disassembling any valve, ensure that all pressure has been removed from
the line and from any cavities within the valve. Contact Pacific Valves before disassembling
any valve.
2.1 Handwheel operated valves
Upon completion of the disassembly procedure listed below, the handwheel 50 may be
separated from the yoke sleeve 31, by removing the handwheel nut 54.
2.2 Gear and motor operated valves
Refer to Appendix 7 of this manual for specific gear and motor information. Note that this
valve is position seated. Do not use motor torque switch settings to close this valve.
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 Crane requires that the pressure seal bonnet gasket 55 be replaced when servicing
any valve.
2.3.3 Caution should be exercised in handling the new bonnet gasket 55 to avoid
scratching its surfaces.
2.3.4 When reassembling the valve it should be noted that it is necessary to re- tighten the
bonnet draw bolts 16C after the system pressure is built up. This process will ensure
a positive seal for the pressure seal gasket.
For all other bolting, excluding gland studs, torque per Appendix 1.

19 | P a g e
PRESSURE
PRESSUREPRESSURE
PRESSURE-
--
-SEAL PARALLEL DISC GATE VALVES
SEAL PARALLEL DISC GATE VALVESSEAL PARALLEL DISC GATE VALVES
SEAL PARALLEL DISC GATE VALVES
CLASS 600, 900, 1500, 2500
ALL SIZES
DISASSEMBLY
• Read the warning notice listed in section 2.0 of these
instructions
• Loosen gland stud nuts 16A. Loosen and remove
bonnet nuts 16C and yoke nuts 16B.
• Install rigging to support weight of the yoke assembly
and the handwheel or actuator if present.
• Turn the handwheel to closed position. The yoke and
handwheel will back off of the stem 70.
• Remove the gland flange 36, gland 35, and all
packing material 46.
• Using a block of wood or similar soft material, drive
the bonnet 30 down until there is sufficient clearance
above the bonnet to remove the segment rings 124.
Care should be taken to ensure that bonnet does not
become cocked during this process.
• Using a brass bar, tap the top of each segment ring
to loosen, using lubricants as necessary. Remove
the segments by prying, with a screwdriver or similar
tool, out away from the body until the segments are
free to be lifted out. Clean all surfaces of foreign
matter prior to next step.
• Replace the yoke and turn the handwheel to open
valve. After back seating, continue to raise the
bonnet until the pressure seal gasket 55 is free. Pull
the yoke assembly, bonnet 30 stem 70, and the
discs 71 from the body 10. Use caution while lifting
the stem/disc assembly off the seats as the disc will
“pop” open at the bottom when free of the seat rings.
• Use extreme caution to not scratch or damage the
sealing surfaces of the body, gasket, bonnet, discs
or seat rings.
• Remove the gasket 55 from the bonnet. Remove the
bonnet over the end of the stem.
• Clean the stuffing box and stem.
REASSEMBLY
• Clean all parts thoroughly. Polish gasket-seating
surface in the body 10, and on the bonnet 30. Replace
gasket 55 with a factory supplied part. Lubricate the
gasket seating surfaces with light oil or other suitable
material to prevent galling during reassembly.
• Insert the disc 71 / stem 70 assembly into the body 10
noting that it is necessary to clamp the bottom of the
discs together so they will fit between the seat rings.
Once between the rings the clamp can be removed
and assembly completed.
• Install the new gasket 55 and packing to the bonnet.
Insert the bonnet into the body 10. Install the segment
rings 124 into the body groove and backseat the
bonnet to seat the gasket and install the bonnet
bolting. Tighten wrench tight only, do not torque.
• Install the yoke and bolting. Install new packing and
replace the gland, and gland flange and tighten the
eyebolt nuts.
PAR IDEN IFICA ION
10 BODY 48A PIN
11 SEAT RING 50 HANDWHEEL
15 SPRINGS 54 WHEEL NUT
16A NUT 55 GASKET
16B NUT 56 JAM NUT
16C NUT 59 GREASE FITTING
16D NUT 70 STEM
20 BEARINGS 71 DISCS
30 BONNET 97 STUD
31 YOKESLEEVE 98A STUD
35 GLAND 98B STUD
36 GLAND FLANGE 120A TOP PLATE
42 CARRIER 120B BASE PLATE
46 PACKING 124 SEGMENT RING
48 CLIP 128 YOKE COLUMN
NOTE: After system pressure has been reestablished,
re-tighten all bolting to the TORQUE values given in
Appendix 1
of this manual.
54
50
31
20
59
56
128
16A
36
35
98A
16B
120B
16C, 98B
NO SHOWN.
46
124
55
30
70
11
10
71
98
97
120A
16D
48a
48
15
42

20 | P a g e
3.0 Maintenance of disassembled valves
3.1 Following the above listed disassembly procedures, examine the body cavity 10 for deposits
of foreign material.
3.2 Examine seating surfaces of seat rings 11 and discs 71 for wear.
3.3 Inspect disc 71 spring holes for wear.
3.4 Examine carrier 42 guide surfaces for wear.
3.5 Examine stem 70, seal area and threads for excessive wear.
3.6 Inspect springs 15 , pin 48A and clip 48 for signs of wear
3.7 If excessive wear is evident, worn parts, or if necessary, the entire valve should be
reconditioned or replaced.
3.8 Crane 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.
3.9 Crane also offers complete remanufacturing services to rework your valve. If you find this
necessary the Crane Valve Service Center will re-manufacture your valve to factory
specifications.
4.0 Lubrication
4.1 Parts requiring lubrication are stem and yoke sleeve threads 70, 31, entire gasket 5, and
under all nuts 16 before torqueing. Bonnet draw studs should be lubricated with an anti-
seize lubricant to promote ease of future disassembly.
5.0 Special tools and instructions
5.1 Recommended bolting torques are shown in Appendix 1of this manual
5.2 A clamping device is recommended to prevent the disc halves from springing open during
installation/removal. This clamp can be a commercially available unit, or contact Pacific
Valves for more information. Certain large valve styles may require the use of a hydraulic
torque device to achieve optimum bolt torque. When final stroking set up is done note that
correct disc position in the closed position is @ .25 in. off the body stops. This is achieved by
closing the valve until the carrier hits the stops, then backing the disc off by opening the
valve @ .25 in. or 1 stem turn.
6.0 Preventative maintenance
6.1 Refer to section “A” of this manual for general valve maintenance information.