APV GLPSNP250AUNF-F Instruction manual

www.australianpipelinevalve.com.au
INSTALLATION, OPERATION & MAINTENANCE MANUAL
GLOBE VALVES OS & Y
FORGED
ISO 15761/API 602/
B16.34

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“Australian Pipeline Valve
produces isolation,
control and flow reversal
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severe and critical service
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pipelines, oil & gas
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products form the most
competitive portfolio
in the market.”
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Special Service
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GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 1
Introduction 3
Safety Information 4-5
Valve Identification 6
1.0 Installation 7-11
1.1 Installation positions 7
1.2 Preparation for installation 8
1.3 End connections 8-11
1.4 Post-installation procedures 11
2.0 Operation 11
3.0 Maintenance 12-17
3.1 Gland packing adjustment 12-13
3.2 Backseating 13-14
3.3 Packing replacement 14-15
3.4 Preventative maintenance and periodic inspections 15-16
3.5 Lubrication 16
3.6 Bonnet bolt tension 16
3.7 Periodic stroking 16-17
4.0 Extraordinary Repairs & Maintenance 17-26
4.1 Stem 17
4.2 Gland disassembly & replacement of stem packing 17-20
4.3 Bonnet disassembly & stem replacement/repair 20-22
4.4 Bonnet reassembly 22
INDEX

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual2
4.5 Disassembly of yoke nut 22
4.6 Disc and seats 22-23
4.7 Disc & seat repair 23-24
4.8 Valve reassembly & test 24-25
Appendix A - Body/bonnet bolting torque 27-28
Appendix B - Figure number system 29
Appendix C - Exploded B.O.M. 30-31
Warranty 32
© Copyright Australian Pipeline Valve 1990 - 2021 Edition
Catalogues, photos, brochures and technical publications are the exclusive property of Australian Pipeline Valve.
Any unauthorised reproduction in total or in part, shall result in prosecution. Products and data sheets in this publication are subject
to change at anytime without notice. Australian Pipeline Valve reserves the right to carry out amendments to products and materials.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 3
INTRODUCTION
The majority of this information is common knowledge to experienced valve users. When properly
installed in applications for which they were designed, Australian Pipeline Valve (APV) valves will give
long reliable service. This instruction is only a guide for installation and operation on standard service and
covers general maintenance and minor repairs. A professional APV approved valve engineering facility
should be utilised for reconditioning or major repairs.
Note
We recommend that this entire document be read prior to proceeding with any
installation or repair. Australian Pipeline Valve and it’s parent company take no
responsibility for damage or injury to people, property or equipment. It is the sole
responsibility of the user to ensure only specially trained valve repair experts
perform repairs under the supervision of a qualified supervisor.
RESPONSIBILITY FOR VALVE APPLICATION
The User is responsible for ordering the correct valves. The user is responsible for ensuring APV Valves are
selected and installed in conformance with the current pressure rating and design temperature
requirements. Prior to installation, the valves and nameplates should be checked for proper identification
to ensure the valve is of the proper type, material and is of a suitable pressure class and temperature
rating to satisfy the requirements of the service application.
Do not use any valve in applications where either the pressure or temperature is
higher than the allowable working values. Also valves should not be used in service
media if not compatible with the valve material of construction, as this will cause
chemical attacks, leakage, valve failure.
RECEIVING INSPECTION AND HANDLING
Valves should be inspected upon receipt to ensure:
- Conformance with all purchase order requirements.
- Correct type, pressure class, size, body and trim materials and end connections.
- Any damage caused during shipping and handling to end connections, hand wheel or stem.
The User is advised that specifying an incorrect valve for the application may result
in injuries or property damage. Selecting the correct valve type, rating, material
and connections, in conformance with the required performance requirements is
important for proper application and is the sole responsibility of the user.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual4
SAFETY INFORMATION
The following general safety information should be taken in account in addition to the specific warnings
and cautions specified in this manual. They are recommended precautions that must be understood and
applied during operation and maintenance of the equipment covered in this I.O.M.
To avoid injury, never attempt disassembly while there are pressures either
upstream or downstream. Even when replacing stem packing, caution is necessary
to avoid possible injury. Disassemble with caution in case all pressures are not
relieved.
To prevent valve bending, damage, inefficient operation, or early maintenance
problems, support piping on each side of the valve. Warning, certain gases and
fluids could cause damage to human health, the environment or property hence the
necessary safety precautions to prevent risk should be taken.
• A valve is a pressurised mechanism containing fluids under pressure and
consequently should be handled with appropriate care.
• Valve surface temperature may be dangerously too hot or too cold for skin contact.
• Upon disassembly, attention should be paid to the possibility of releasing
dangerous and or ignitable accumulated fluids.
• Ensure adequate ventilation is available for service.
This manual provides instructions for storing, general servicing, installation and removal of globe valves.
APV and it’s resellers refuse any liability for damage to people, property or plant as well as loss of
production and loss of income under any circumstances but especially if caused by: Incorrect installation
or utilisation of the valve or if the valve installed is not fit for intended purpose. It is the sole
responsibility of the user to ensure the valve type and materials are correctly specified.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 5
DURING OPERATION TAKE INTO ACCOUNT THE FOLLOWING WARNINGS:
a- Graphite/Graphoil packing and body gaskets are very brittle, any impacting, twisting or bending
should be avoided.
b- The valve’s internal parts such as disc, stem, seats, seals, gaskets shall be handled with care avoiding
scratches or surface damage.
c- All tools and equipment for handling the internal parts shall be soft coated or else take extreme care,
especially on machined mating surfaces and with soft parts.
d- Valves can be fitted with gaskets or seals in PTFE, Buna, Viton, etc., hence high temperatures will
damage sealing components.
e- Globe valves can be used to throttle for short periods (on clean service only) but only if at least 25%
open or else venturi action will damage seating area, body.
For all operations make reference to position number on part list of the applicable drawing listed.
Packing leakage could result in personal injury. Valve packing is tightened prior to
shipping but may require readjustments to meet specific service conditions.
Personal injury may result from sudden release of any process pressure. APV
recommends the use of protective clothing, gloves and eyewear when performing
any installation or maintenance.
Isolate the valve from the system and relieve pressure prior to performing
maintenance.
Disconnect any operating line providing air pressure, control signals or electrical
power to actuators.
Check the packing box for pressurised process fluids even after the valve has been
removed from the pipeline, particularly when removing packing hardware or
packing rings, or removing packing box pipe plug.
If a gasket seal is disturbed while removing or adjusting gasketed parts, APV
recommends installing a new gasket while reassembling. A proper seal is required
to ensure optimum operation.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual6
VALVE IDENTIFICATION
Each APV valve is identified with a nameplate, which is placed over the handwheel and secured with the
hand wheel nut on gate and globe valves, and riveted to the cover on check valves. Below is an example.
E
N
D
S
N
P
T
F
8
0
0
A
1
0
5
N
C
R
1
3
C
R
1
3
+
S
T
#
6
5
0
N
B
G
A
B
B
N
P
1
5
A
X
R
1
0
9
8
2
7
3
8
-
2
C
L
A
S
S
B
O
D
Y
D
I
S
C
S
I
Z
E
S
E
A
T
A
P
I
6
0
2
A
S
M
E
B
1
6
.
3
4
1
9
6
3
7
5
4
8
2
ITEM DESCRIPTION
1 Applicable design codes
2APV valve gure number which delineates the as-built valve type, body, trim, features, packing, NACE, etc. Refer gure
number system in Appendix B
3Shell material (e.g. body, bonnet)
4Seat material
5Closure member material
6Rated pressure class
7Serial/batch numbers
8Nominal pipe size
9End connections
When performing any work, ordering spare parts, or requesting technical support, please refer to this
tag. The serial number, the part number and numbers on the side of the valve body are keys to proper
valve identification.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 7
1.0 INSTALLATION
Piping should be properly aligned and supported to reduce mechanical loading on
the end connections.
1.1 INSTALLATION POSITIONS
Globe valves are unidirectional and have the direction of flow indicated on
the valve body. Globe valves should be installed with the stem in a vertical up
position on horizontal lines. Other acceptable stem positions are at an angle
between the vertical and horizontal axis which still allows for complete
drainage. If installed with the stem below the horizontal axis, complete drainage is not possible and solids
may accumulate in the valve bonnet, which will greatly affect the valve operation and service life. Globe
valves may also be installed in vertical lines but this must be specified at time of order so the valve can
be as-built and tested for vertical service. See Figure 1 for details.
Australian Pipeline Valve screw-down non-return globe valves are recommended for use in horizontal
lines only. Right angle globe valves are recommended for vertical lines.
FIGURE 1
VALVE POSITIONING
Horizontal Line Vertical Line
A
c
c
e
p
t
a
b
l
e
Maximum Rotation
N
o
t
A
c
c
e
p
t
a
b
l
e

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual8
1.2 PREPARATION FOR INSTALLATION
• Remove protective end caps or plugs and inspect valve ends for damage to threads, socket weld
bores or flange faces.
• Thoroughly clean adjacent piping system to remove any foreign material that could cause damage
to seating surfaces during valve operation.
• Verify that the space available for installation is adequate to allow the valve to be installed and to
be operated.
Note
Ensure sufficient clearance for the stem in the full open position may cause the
valve to be inoperable. Inadequate clearance for valve may add mechanical loading
to the valve ends. Sufficient clearance should be allowed for threaded valves to be
‘swung’ during installation.
1.3 END CONNECTIONS
1.3.1 Threaded Ends
Check condition of threads on mating pipe.
Apply joint compound to the male end of joint only. This will prevent compound from entering the valve
flow path. Wrenches should be used on the valve end closest to the joint being tightened.
1.3.2 Flanged Ends
Check to see that companion flanges are dimensionally compatible with the flanges on the valve body
and make sure sealing surfaces are free of dirt.
Install the proper studs and nuts for the application and place the flange gasket between the flange
facings.
Stud nuts should be tightened in an opposing criss-cross pattern in equal increments
to ensure even gasket compression. Refer Appendix A, Figure 10.
1.3.3 Socket weld Ends
Remove all, debris grease, oil, paint, etc., from the pipe that is to be welded into the valve and from the
valve end connections.
Insert the pipe into the valve end connection until it bottoms out in the socket weld bore. Withdraw the
pipe 1.59mm (1/16”) so that a gap remains between the pipe and the bottom of the socket weld bore to
prevent cracks (ASME B1.11). Tack the pipe into the valve and complete the fillet weld.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 9
Globe valves should be lightly closed during welding to prevent damage to the
seating surfaces and stem caused by thermal expansion during the weld process.
1.3.4 Buttweld Ends
In accordance with ASME B16.25 clean the weld ends as necessary and weld into the line using an
approved weld procedure. Make sure the pipe and valve body material given on the nameplate or valve
body is compatible with the welding procedure. (Refer our compatibility cross reference chart for
equivalent pipe, valve & fitting grades).
1.3.5 Valve Installation by Welding
In accordance with ASME B16.11 unless the valve contains PTFE packing and/or gasket, leave valves
assembled and in the lightly closed position during installation, welding and post-weld heat treatment.
This will prevent the valve seat from floating or distorting during the process. After welding completion,
open the valve and flush line to clean out any foreign matter.
Valves under 40mm (1 1/2”) containing PTFE packing and/or gasket must be dis-assembled for installation
as the welding temperature can adversely affect the PTFE components. Remove the bonnet and bonnet
gasket and match mark each component during disassembly for proper reassembly.
If you do not disassemble valves it will be the responsibility of the operator to ensure valves are kept cool
during welding and then post-weld testing of the valve should be performed. Larger size valves over
65mm NB are less likely to transmit heat to bonnet and stem packing during welding but still care should
be taken.
The responsibility for welding of the valves into piping systems is that of those performing the welding.
Refer to ASME B31.1, B31.3 etc. Written welding procedures covering all attributes of the process and
materials to be welded shall be in accordance with Section IX of the ASME Boiler and Pressure Vessel Code
and any additional requirements from the applicable piping code including any possible necessary
localized PWHT depending on material specifications.
APV forged globe valves do not run the risk of seat loosening during welding due to
the fact that they are supplied with integral Stellite body seats.
Subsequent to welding, clean and inspect the finished weld(s) and, if necessary, repair any defects using
a qualified weld repair procedure. In addition, cycle the valve open-closed to check for proper operation,
making sure no binding has occurred due to the weld heat.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual10
Special trim options and body materials such as valves with PTFE packing/soft seat/
special seals/ and gaskets that have maximum temperature limits less than the
valve, may require special welding and heat treatment considerations which are not
included herein.
FIGURE 2
INCORRECT
Arcing can occur across
close tolerance areas of valve
due to ground strap location.
Ground Strap
Ground Strap
Welding
CORRECT
Ground strap is
positioned before the valve.
Welding
WELD SET UP
1.3.6 Post Weld Heat Treatment (PWHT)
The recommended method of PWHT is via local ceramic resistance heaters, individually monitored with
thermocouples. Thermocouples are attached to the weld or welds. Properly sized ceramic heaters are
wrapped around the weld area, extending approximately 6.35mm (1/4”) past the weld on the valve side.
Do not wrap the valve body with a heating element. See Figure 1 for details. Wrap flexible insulation
around valve ends, extending approximately 12.5mm (1/2”) past the valve on the valves side. It is not
recommended to wrap the entire valve body with insulation. Prior to heat input close the valve
completely, then open the valve approximately 1.58mm (1/16”) of a turn after the handwheel slack is run
out. This very slight opening will allow the trim components to expand during the thermal cycle.
Following PWHT, inspect the valve for smooth operation by cycling open and closed. If possible, perform a
seat closure pressure test prior to service operation.
FIGURE 3
4
3
2
1
ITEM DESCRIPTION
1THERMOCOUPLE
2VALVE
3FIBRE INSULATION
4CERAMIC HEATERS
POST WELD HEAT TREATMENT

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 11
APV does not make any recommendations in regards to the actual PWHT details of
temperature and time. This work is not within the scope of APV. APV recommends
that all applicable “Piping Code” requirements be considered.
For alloy steel valves or when welding specification or service conditions require field PWHT, the valve
may be order with pipe nipples already welded and heat treated in the factory before valve assembly.
The specified PWHT can then be performed in line without affecting the valve.
1.4 POST-INSTALLATION PROCEDURES
After installation, the line should be cleaned by flushing to remove any foreign material. When caustics
are to be used to flush the line, additional flushing with clean water is required. The valve should be
opened and closed after installation to ensure proper operating function.
With the line pressurised, check the valve end connections, body to bonnet/cover joints and stem packing
area for leaks. The packing may have to be tightened to stop packing leakage.
2.0 OPERATION
Forged globe valves should not be used to throttle to openings less than 20% or else flow induced
vibration/venturi effect will damage seat and disc. Because of the body’s labyrinth design, the globe
valve causes a larger pressure drop than a gate valve. Because of this, the globe valve is an excellent
device for regulation of flow in the moderate to full flow range.
Globe valves should not be left in the fully backseated position under normal
operating conditions. The packing may dry out under these conditions and leak as
the valve is closed. However, depending on media, size, class and valve age many
operators choose to leave the valve fully backseated at all times. Even when doing
so there will still be usually some minor leakage past the back seat.
A cool valve may leak through the gland when opened to hot fluid. Wait before tightening the packing as
the problem may go away.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual12
3.0 MAINTENANCE
Proper safety equipment and apparel should be worn when preparing to service a valve. Observe the
following general warnings:
• A valve is a pressurised mechanism containing energised fluids under pressure and
consequently should be handled with appropriate care.
• Valve surface temperature may be dangerously too hot or too cold for skin
contact.
• Upon disassembly, attention should be paid to the possibility of releasing
dangerous and or ignitable accumulated fluids.
• Ensure adequate ventilation is available for service.
3.1 GLAND PACKING ADJUSTMENT
Tools Required: - aside from standard wrenches (for bonnet cap screws and packing gland nuts) the only
tool needed for minor Australian Pipeline Valve valve maintenance is a packing hook.
Special care is to be placed in the tightening of the gland nuts during installation, in order to get the
proper packing adjustment and functionality.
The packing gland should be checked periodically in service and tightened as necessary to stop leakage
around the stem. Tighten in a manner to develop uniform loading on the gland. Tighten only enough to
stop the leak.
FIGURE 4
RIGHT WRONG

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 13
Over tightening will cause the packing to fail prematurely as well as increasing the
force required to operate the valve. The packing gland flange should not bend even
slightly, if it does you have over-tightened the valve and have to replace the flange.
If the leak cannot be stopped by tightening the gland nuts, it is necessary to add additional packing rings
or completely repack the valve. Adding additional packing rings may damage the stem sealing system
over a longer term. While most Australian Pipeline Valve globe valves are equipped with a back seat
feature, it is NOT ALLOWED TO REPACK THEM UNDER PRESSURE. For fugitive emission service, proprietary
fugitive emission packing must be used.
Note, PTFE packing has superior sealing properties compared to graphite, but is not firesafe. PTFE packing
is only rated to 180°C maximum but PTFE pressure rating also down rates as temperature increases above
50°C.
When placing a new valve into service, Australian Pipeline Valve recommends a preliminary packing
adjustment to verify proper packing load. Additionally, it is recommended that a Baseline Leakage Test be
performed following installation, but prior to start-up.
During the packing life cycle, normal and routine maintenance of the packing arrangement must be
administered. Normal cycle life may require packing gland nut adjustments. Torque values vary
depending upon valve type, class, design, boltings, material and size. Tighten the gland packing nuts
clockwise. Do not over tighten or the valve will become too tight to turn (see Section 4.2.1.)
3.2 BACKSEATING
For normal operation in the open position, the stem should be backed off so that the backseat is not in
contact. This permits the stem packing to assume it’s intended sealing function and not conceal
unsatisfactory stem packing. In the event of stem packing leakage, the back seat can be used to stop
stem leakage until circumstances permit a system shutdown and time for packing replacement. Stem
packing replacement with the valve under pressure and backseated represents a hazard and should not
be undertaken. The hazard is magnified as fluid pressure or temperature increases or when the fluid is
toxic.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual14
Under no circumstances should the back seat be used to allow gland packing
replacement or repair while the valve and system are pressurised.
One of the most common misunderstandings is to believe that is the Globe valve is
back seated (fully open position - and backseat sealing made), this will help to
prevent wear of the packing rings. Unfortunately using the back seat in this way
over a longer period of time, could result in some serious issues:
a) Since the body, bonnet, stem and disc heat up and expand at different rates,
experience shows that valve can get jammed/blocked in back-seated position.
b) The gland packing will dry out faster since it’s not exposed to the media, and
could immediately blow upon closing of the valve.
To avoid this, once the valve is brought into fully open position (back seated), turn
the handwheel back on full turn.
Prior to replacing the packing rings, remove all pressure from the valve.
WARNING: If the backseat faces have been damaged by foreign material the
backseat may leak into the packing chamber.
3.3 PACKING REPLACEMENT
Ensure the line pressure is totally isolated prior to attempting to repack valve in-line. Wear anti-splash
eye protection goggles. See Caution below, do not attempt to repack the valve in line if dangers noted
applies as even if the valve is isolated there can be media trapped in the valve or line. Australian Pipeline
Valve graphite or PTFE and graphite packing sets have a diagonal cut that will allow them to be installed
around the stem of an assembled valve. However, the factory installed intermediate graphite packing
rings are sometimes die formed and have no end cut. As a result, these rings cannot be replaced without
removing the valve bonnet. If the valve is to be repacked without removing the bonnet, care must be
taken when removing the original packing not to scratch the valve stem sealing surface. Where it is
necessary to repack the valve in-line, a compatible ribbon packing system or equivalent braided packing
stock should be used. The joints in the packing rings should be diagonally cut. When installing the rings,
care should be taken to stagger the packing rings. See Figure 6. Refer to Section 4.2.1 for full packing
replacement procedure.
In the case of dangerous, hazardous, volatile, caustic or flammable liquids or gases,
it is dangerous to attempt to repack the valve in-line even if pressure has been
isolated. Never attempt any metal scraping, scratching or machining which as this
can cause inflammable liquids to ignite or personal chemical injury.
Other specialty packing such as V-ring Teflon may require that the valve be disassembled if repacking is
required.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 15
Back seating the valve and attempting to repack under pressure is hazardous and is
not allowed under any circumstances. Rather than attempting to repack under
pressure, it is preferable to use the backseat to control the stem leakage until
shutdown of the line provides safe repacking conditions.
Prior to replacing the packing rings, remove all pressure from the valve. If the
backseat faces have been damaged by foreign material the backseat may leak into
the packing chamber.
3.4 PREVENTATIVE MAINTENANCE AND PERIODIC INSPECTIONS
APV recommends that periodic inspections be carried out on all valves. The frequency of these inspections
depends on the severity of the service and the frequency of the valve operation. As a minimum, all valves
should be inspected 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.
Item to Inspect Stop Check Globe
Check all lubrication points
Check body/bonnet join for leaks
Check for packing leaks
Check stem threads for wear
Ensure stem and seal areas are free from debris
If conditions permit, operate valve
Inspect all external connections
Inspect condition of actuator and/or gear operators (if applicable)
Inspect valve for obvious damage
Do not remove or loosen the packing gland or bonnet bolts while the valve is
pressurised.
1. The valve stem packing should be inspected monthly. If the stem packing shows signs of leakage,
simply tighten the adjusting nuts to compress the packing. Do not over tighten the adjusting nuts as
this will make operation of the valve more difficult. If, after tightening the adjustments nuts to their
fullest extent, the leakage does not stop, it is then necessary to replace the stem packing. It is not
recommended that additional packing rings be added to the stuffing box as this may cause damage to
the stem sealing system. For packing replacement see Section 3.3.
2. The lubrication of the yoke nuts should be inspected at least monthly. A high pressure grease gun
should be used for valves supplied with ball type grease fittings.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual16
3. Bonnet bolt tension should be checked periodically when valves are used in high temperature
applications where creep may occur. (see Tables A & B, Appendix A, and Figure 10). Although leaks
through bonnet ring or spiral gaskets are rare, erosion or corrosion could cause bonnet seal to fail. In
these cases, a new gasket is required. Refer Sections 4.3.1 & 4.3.2 for replacing bonnet gasket.
4. With problematic service applications it is recommended that the valve be periodically at least
partially stroked to ensure valve functions and to ensure there is no product deposits entering into seat
or stem area which may render operating more difficult. Duration depends on service, criticality, etc.
However, it also must be factored in that if there are impurities or particulates in the line, likely to be
built up in the seat area, each operation could reduce seat life proportionately.
3.5 LUBRICATION
Regular maintenance of the valve is required to assure smooth operation. Stem threads should be
inspected and lubricated frequently to ensure ease of operation. APV valves are supplied with the stem
threads engaging the yoke nut pre-greased. These components should be kept constantly lubricated by
applying the grease directly on the stem when the valve is in the open position or through the grease
injector in the yoke nut when provided. Lubrication/greasing of the stem should be conducted every six
months or more often as needed, based on the environment the valve is installed. Inspection should
confirm that the valve is sealing properly. Stem packing should be inspected at least every six months to
ensure zero leakage from the packing chamber. For water & oil service, regular maintenance should be
scheduled every 3 months. For more corrosive mediums, inspection and maintenance should be completed
once a month.
3.6 BONNET BOLT TENSION
Bonnet bolt tension should be checked periodically when valves are used in high temperature applications
where creep may occur. Although leaks through bonnet ring or spiral gaskets are rare, erosion or
corrosion could cause bonnet seal to fail. In these cases, a new gasket is required. Refer Sections 4.3.1 &
4.3.2 for replacing bonnet gasket. Refer Appendix A, Tables A & B and Figure 10 for torque figures and
tightening sequence.
3.7 PERIODIC STROKING
With problematic service applications it is recommended that the valve be periodically at least partially
stroked to ensure valve functions and to ensure there is no product deposits entering into seat or stem
area which may render operating more difficult. Duration depends on service, criticality, etc. However, it
also must be factored in that if there are impurities or particulates in the line which are likely to be built
up in the seat area, each operation could reduce seat life proportionately.
APV globe valves have one point of lubrication, the stem/yoke sleeve threads. Lubricate as follows:
- For APV globe valves with grease fitting, lubricate through the fitting.
- For APV globe valves without grease fitting, open the valve to half stroke.
- Brush lubricant on the stem threads above and below the yoke nut.
- Run a complete “open-close” cycle, the stem/yoke are now lubricated.

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 17
FIGURE 5
Lubrication
Points
Globe Valve - Top Works
(no grease fitting)
Globe Valve - Top Works
(single grease fitting)
4 . 0 EXTRAORDINARY REPAIRS &
MAINTENANCE
Due to the relatively low replacement cost of small diameter standard carbon steel valves under, it is usually
less expensive to replace the complete valve than to have maintenance personnel effect repairs. Generally,
the only justifiable repairs are replacement of packing and gaskets as previously described.
Always replace the bonnet gasket whenever a valve is disassembled. ‘Pressure seal’ style bonnet valves (see
example drawing Appendix C) require a proprietary gasket. After removing valve from line, use adequate
force to remove bonnet. Gasket seating surfaces should be scraped clean (avoid radical marks). Bonnet bolts
should be tightened in a diagonal pattern at several different increasing torque settings until the final
recommended torque value is attained. Refer to Tables A & B in Appendix A, and Figure 10.
Other specialty packing such as V-ring Teflon will require that the valve be disassembled if repacking is
required.
4.1 STEM
If the stem locks or “freezes”, causes can generally be attributed to dry worn packing or a dry yoke nut. In
either of these cases, the following service is required:
a) Unscrew gland nuts, remove the gland flange and bushing to expose stem packing and packing spacer
(where one is fitted). Replace stem packing if it is damaged.
b) Check lubrication of yoke nut. If it is dry, remove the yoke nut but determine if there is evidence of seizure
marks. If so replace it with a new yoke nut.
4.2 GLAND DISASSEMBLY & REPLACEMENT OF STEM PACKING
In those cases where the valve cannot be removed from the piping system, it is important that prior to
servicing, the valve be opened to its fullest extent and purged of any pressure/fluid (protective safety
goggles should be worn).
a) Australian Pipeline Valve graphite or PTFE and graphite packing sets are usually die formed and have no
end cut. As a result, these rings cannot be replaced without removing the valve bonnet. If the valve is to be

GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual18
repacked without removing the bonnet, care must be taken when removing the original packing not to
scratch the valve stem sealing surface. For fugitive emission service, proprietary fugitive emission
packing must be used.
Note, PTFE has superior sealing properties compared to graphite, but is not firesafe.
Genuine APV die formed moulded low friction PTFE or graphite packing sets are recommended. A
compatible ribbon packing system or equivalent braided packing stock may be used but the emissions
will be higher. Also torque may increase. A corrosion inhibitor is recommended for stuffing box.
b) Partially unscrew gland packing nuts to reduce the compression load on the stuffing box. Remove the
stem packing.
c) Lift the gland flange/follower and gland out of the stuffing box.
d) Remove old packing as per Section 4.2.1 below.
e) APV fugitive emission graphite and PTFE packing has solid seal ring that must be cut for removal. Any
remains of existing packing must be removed from the stuffing box and stem.
4.2.1 Stem Packing Replacement & Stem Repair
First remove the valve from the line. To prevent injury ensure that all fluid and
pressure is removed from the valve both upstream and downstream before removal
and disassembly. When removing drain or stem plugs, wear protective eye masks to
avoid injury.
1. Check tightness of valve operation to serve as reference when re-tightening. Remove gland nuts and
the hook. Lift the gland up the stem clear away from the packing chamber.
2. Remove the defective packing rings with a sharp tool or packing hook. Do not scratch or score the
machined surfaces of the stem or packing chamber.
3. Examine the machined surfaces of the stem and packing chamber. Remove any scratches, scoring or
burrs with an emery cloth or by hand filing. Clean the stem with a solvent soaked rag.
Scratches to the stem and the packing chamber no deeper than 0.25mm (0.010”) can be removed by
polishing the surface with a buffing wheel. The surface finish of the packing should be Ra 3.2µm and
the stem should be Ra 0.5 ~ 0.8µm.
4. Count original number of rings and measure x-section thickness. If original packing cannot be counted
or measured, follow the steps below:
a) Measure the stem diameter (OD), stuffing box diameter (ID) and stuffing box depth (d)
b) Packing x-section (R)=(ID - OD)/2
c) # rings = (1.25 x d)/R
5. Install new packing. Use a genuine APV low emission, low friction packing set. If using standard coils
of packing material: cut each ring at a 45 degree angle and stagger the joints at 120 degrees, every
fourth joint will be in the same position as the first. Install rings individually using a split ring spacer,
compressing each ring by hand tightening + 1/4 turns on each packing gland nut.
6. Each ring should be firmly compressed into position before the next ring is added. Rings should fit