APV Superseal SLHBF Instruction manual

www.australianpipelinevalve.com.au
INSTALLATION, OPERATION & MAINTENANCE MANUAL
HIGH PERFORMANCE
BUTTERFLY VALVES
“DOUBLE OFFSET”
MODEL SLHBF & SLHBFFS

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HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 1
Introduction 3
Safety Information 4-5
1.0 Overview 5-6
1.1 General note 5
1.2 Type 5-6
1.3 Scope 6
2.0 Storage 6-7
2.1 Temporary storage 6
2.2 Long term storage 6
2.3 Preparation 7
3.0 Operation 7-8
3.1 Manual operation 8
3.2 Lock device 8
4.0 Pre-installation 8-10
4.1 Inspecting valve & accessories 8
4.2 Inspecting pipeline 8
4.3 Pressure testing of pipe section 9
4.4 Installation of pipeline 9-10
4.5 Safety precaustions 10
5.0 Installation 10-12
5.1 Installation positions 11
5.2 Preparation for installation 11-12
INDEX
API622 2011 2nd Edition
ISO 15848-2
Fugitive Emission Certied
API607 6th & 7th Ed.
ISO 10497-5
Firesafe Certied
API 607 6th & 7th Ed.
ISO 10497-5
Firesafe Certied
API 622 & ISO 15848-1
Endurance Test Certied
API 622 2011 2nd Edition
ISO 15848-2
Fugitive Emission Certied

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual2
© Copyright Australian Pipeline Valve 1990 - 2019 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.
6.0 Maintenance 12-19
6.1 Packing 12-13
6.2 Seat ring/seat retainer 13
6.3 Removing valve from the line 13-14
6.4 Dismantle the seat ring & seat retainer 15-17
6.5 Packing replacement 17-18
6.6 End cover replacement 18
6.7 Seat ring replacement 19
Appendix - Bolt tightening sequences 20

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 3
INTRODUCTION
The majority of this information is common knowledge to experienced steel valve users. When properly
installed in applications for which they were designed, APV valves will give long trouble free service. This
instruction is only a guide for installation, operation and minor maintenance. A professional APV approved
valve engineering facility should be utilised for reconditioning and major repairs.
Note
We do recommend however 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. APV Valves are to be installed in the observance of
the pressure rating and design temperature. Prior to installation, the valves and nameplates should be
checked for proper identification to be sure the valve is of the proper type, material and is of a suitable
pressure class and temperature limit to satisfy the applications requirements.
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.
RECEIVING INSPECTION AND HANDLING
Valves should be inspected upon receipt to determine:
- Compliance to purchase order requirements.
- Correct type, pressure class, size, body and trim materials and end connections (this information may
be found on the nameplate or may be stamped on the body of the valve).
- Any damaged caused during shipping and handling to end connections, hand wheel or stem.
The End User is advised that misapplication of the product may result in injuries or
property damage. A selection consistent with the particular performance
requirements is important for proper application and is the sole responsibility of the
end user.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual4
SAFETY INFORMATION
The following general safety notices supplement the specific warnings and cautions appearing elsewhere
in this manual. They are recommended precautions that must be understood and applied during operation
and maintenance of the equipment covered herein.
To avoid injury, never attempt disassembly while there are pressures either
upstream or downstream. Even when replacing packing rings, caution is necessary
to avoid possible injury. Disassemble with caution in the event all pressures are not
relieved.
To prevent valve distortion, inefficient operation, or early maintenance problems,
support piping on each side of the valve.
• A valve is a pressurised device containing energised fluids and 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.
• Adequate ventilation should be available for service
This manual describes the methods of installation and maintenance for lined butterfly valves.
APV refuses 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 client to
ensure the valve type and materials are correctly specified.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 5
DURING OPERATION BEAR IN MIND THE FOLLOWING WARNINGS:
a- The graphoil packing and body gasket is very brittle: any twisting or bending shall be avoided.
b- The internal parts of valves (disc, stem, seat) shall be handled with care avoiding scratches or surface
damage.
c- All tools and equipment for handling and supporting the internal parts shall be coated with soft
materials.
d- Seats & seals usually include Viton, Buna & Teflon hence high temperatures will damage sealing
components.
e- Never part open or part close valve, valve must be fully open of fully closed or else seats will be
damaged.
f- Check to see if the valve is specified for isolation service only or for control valve use or both (typically
metal seated valves are suitable for control valve use). Also, familiarise yourself with the shut off class
of the valve as various levels of shut off classes can be specified.
For all operations make reference to position number on part list of the applicable drawing and overview
diagrams 4 to 9. Overview explosions shown in diagrams 4 to 9 are general drawings only, for more
accuracy refer to the as-built drawings supplied with the order.
1.0 OVERVIEW
1.1 GENERAL NOTE
High performance butterfly valves have a Double eccentricity and can be used for automatic proportion
control or isolation. However, for control valve use, valves must be metal to metal seated and throttling
over 75% closed or under 25% open will still dramatically reduce seat & disc and valve body life, even
more so at higher pressures and if service is not clean. Also for throttling/control applications, a special
metal to metal seat design must be specified which is typically class IV or V shut off. However, normally
the triple eccentric SLHBFFS-T is specified for control valve use or class VI shut off isolation service is
required. A simple and unique valve design enables the user to assemble and disassemble easily.
Only model SLHBFFS is firesafe not SLHBF. SLHBFFS must have graphite stem packing
or it is not firesafe. Even in metal to metal seat design if only class IV shut off then
the valve is not firesafe design. The valve is only firesafe if API 607 is indicated on
the lable and the material certificate. For fugitive emission service special packing
systems must be specified.
1.2 TYPE
Valves are classified as Wafer Type, Lugged Type or Flanged. Their principal parts consist of body, disc,
seat and stem. Material of each part is determined by the application and working condition of the valve.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual6
DIAGRAM 1
Wafer Type Lug Type Flange Type
1.3 SCOPE
This manual describes the methods of installation and maintenance for high performance butterfly valves.
2.0 STORAGE
2.1 TEMPORARY STORAGE
If valves are to be stored before installation, the following should be observed:
a) Keep the valves wrapped and protected as shipped from the manufacturer.
b) Do not remove the protective ends covering until the valve is ready for installation. This will reduce the
possibility of foreign material damaging the internal valve components.
c) Valves stored outdoors should be positioned such that water does not accumulate in the valve body.
d) We recommend you tropicalise bore and ends of valves if stored in humid or salt air environment.
2.2 LONG TERM STORAGE
If valves are to be stored more than one year, they should be prepared in the following manner:
a) Remove the packing and apply a preservative to the packing chamber.
b) Do not remove the protective end covering.
c) Do not store the valves outdoors.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 7
2.3 PREPARATION
If storage in the field for a long time before installation is necessary, it is suggested to put valves in a dry
and/or covered place. In this case the packaging and end covers integrity is especially important. All the
valves are supplied with special plastic ends to cover and protect the internal parts. We recommend you
do not remove them during storage period. Valves should be left in open position (unless actuated and set
fail closed).
a) Remove the valve end protection.
b) The inside of the valve should be inspected and blown out with compressed air. Adjacent piping must
be clean and free from debris to prevent damage to the valve.
c) To prevent valve distortion, inefficient operation or early maintenance problems, support piping on
each side of the valve.
d) Make sure the valve is positioned such that there is sufficient space so that the handwheel is easily and
safely reached and there is enough clearance for the stem when the valve is open.
e) Install valve according to the flow indicator on the valve body where applicable.
3.0 OPERATION
The valve operator types include: lever handle, manual gear, pneumatic actuator and electric motor
operated actuator. By rotating or closing the valve’s disc flow can be controlled through the pipeline by
regulating the flow or shutting it off.
(Generally, on-off direction is indicated on the operator). For control
valve use, valves must be ‘metal to metal’ seated and throttling too far closed or at a small percentage of
open will dramatically reduce seat & disc and valve body life, even more so at higher pressures and if
service is not clean.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual8
3.1 MANUAL OPERATION
Valve adjustment is performed by clockwise turning of the stem. Lever operated and gear operated
valves have a position indicator to indicate open or closed (see Diagram 2). Normal isolation butterfly
valves are not designed to be used for throttling. Do not leave part open, or seats will be damaged.
Valves must be full open or full closed. (See 3.0 above for control valve applications).
DIAGRAM 2
3.2 LOCK DEVICE
Where provided (optional) the valve has a locking lug that allows valve to be locked in full open or full
closed position.
4.0 PRE-INSTALLATION
Before installation of the valve to the line, it is recommended to inspect the valves as below.
4.1 INSPECTING VALVE & ACCESSORIES
- Ensure that there has been no damage to the valve during transportation.
- Remove the protective end covers just before installation and clean internals and face with an air gun
or with a clean dust cloth.
- Check the tightness of all the bolts and nuts.
4.2 INSPECTING PIPELINE
- Remove foreign materials such as a rust, welding slag, etc., which remain in the pipeline.
- Ensure flanges and gasket surface are clean.
When the fluid is flowing through the line, any foreign materials can damage the
disc, seat and inner body causing leakage past the seat.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 9
4.3 PRESSURE TESTING OF PIPE SECTION
- First thoroughly flush newly installed line systems in order to flood out all foreign substances.
- The testing pressure of an opened valve must not exceed the value of 1.5 x PS (at 20°C/68°F). The
component with the lowest PN limits the maximum permissible testing pressure in the line section. (PS =
maximum permissible operating pressure, see also name plate).
- A closed valve must only be pressure-tested with 1.1 x PS.
4.4 INSTALLATION IN PIPELINE
The sealing surfaces on flange ends are designed according to EN 1514-1 or ANSI B16.21. Mating must
feature smooth sealing strips, e.g. shape C, D or E in accordance with the EN 1092 or EN 1759 standard. For
a flange connection only suitable gaskets must be used.
To avoid any damage to valves with weld ends:
When welding the valve into the pipeline the welding process has to be controlled
in such a way that the supplied heat is limited and a distortion of the valve body is
avoided.
The actuator is adjusted for the operating data stated in the order:
The setting of the end stops “OPEN” and “CLOSED” must not be altered without the
consent of APV.
If - in exceptional case - a valve has to be mounted without an actuator, it has to be ensured that such a
valve is not pressurised.
No valve must be operated the permissible pressure/temperature range (=”rating”)
of which is insufficient for the operating condition.
The non compliance of this instruction involves a risk to life and limb and may cause damage to the pipe
system.
- Butterfly valves with a short face-to-face dimension: - mating flanges and/or pipe ends have to feature
a clear span allowing for sufficient space for the opened valve disc so that the latter is not damaged
when being swivelled out. Refer to dimensions on APV drawing.
– Prior to installation the valve and the down-stream pipeline have to be thoroughly cleaned of any
contamination, especially of hard foreign substances.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual10
Valves with a short face-to-face dimension have to be mounted with disc in closed
position otherwise the valve disc could be damaged.
4.5 SAFETY PRECAUTIONS
- Ensure the line is depressurised and drained.
- Check the pipeline media. Care should be taken for protection against toxic and/or flammable fluids.
- Never install the valve without an operator already attached to the valve shaft.
- Never remove the operator from the valve while the valve is in the pipeline under pressure.
- Always ensure that the disc is in the full-closed position before installing the valve.
- Take care handling the valve.
5.0 INSTALLATION
- Make sure the valve disc is fully closed. (Usually, valve is delivered with disc closed tightly to protect
the seat ring).
– Check the preferred flow direction indicated by the arrow on the valve body.
- Be sure to place a gasket between the valve and pipe flange.
- Refer Appendix A for bolt tightening sequence example. Gradually tighten more each rotation.
- See Diagram 3.
- Before installing the valve, the user must check the valve model, connection dimension and flowing
direction of the medium, ensure in accordance with requirement of valve. Confirm the construction
material list on nameplates (service, pressure, temperature) are appropriate for the application
intended and are as specified.
- Inspect the seat ring to make sure that it was not damaged during lifting & handling process. This is
especially important in case of valves shipped with the disc in the open position and with ‘fail-open’
actuators.
- Define the preferred mounting orientation with respect to the system pressure. If any (see the arrow
on body), identify the upstream side (high pressure) and downstream side (low pressure).
- Optimum valve installation is with the stem in a horizontal plane (with the actuator on top of the valve
not below it as any packing leaks could damaged the actuator/gearbox) or worse case have the stem
at an angle so as to minimise solid particles present in fluid that otherwise could deposit in the low
bearing area.
- Check the packing gland to ensure it is properly tightened.
- During installation, the disc must be in closed position.
- For working temperature above 200°C thermal insulation of valve body is recommended.
- The installer must have skilled and experience in valve installation and maintenance.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 11
The valve will operate in both directions, however, the valve must be installed so flow is in the direction
indicated on the body as the valve is designed to isolate flow from one direction. If you require bi-
directional isolation it must be specified when ordering, even a preferred flow direction may still be
indicated.
Over torque on the bolts might cause damage of gasket.
DIAGRAM 3
Allow enough gap to allow the valve
to slip easily between flanges.
When installed, position of valve
should be closed to prevent disc
sealing area from being damaged.
Flange gaskets should be
centered along with valve.
To prevent leakage through gasket,
tighten the bolts completely.
FLOW
UPSTREAM
DOWNSTREAM
Clean pipe flange faces and valve
faces of any residue or dirt.
For preferred ow direction refer to valve and drawing
Piping should be properly aligned and supported to reduce mechanical loading on
the end connections.
5.1 INSTALLATION POSITIONS
Butterfly valves should be installed as indicated in Diagram 3.
5.2 PREPARATION FOR INSTALLATION
• Remove protective end caps or plugs and inspect valve ends for damage to threads or flange faces.
• Thoroughly clean adjacent piping system to remove any foreign material that could cause damage to

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual12
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. Inadequate
clearance for valves may add mechanical loading to the valve ends.
6.0 MAINTENANCE
No maintenance is required unless the valve leaks. However, routine inspection is recommended for safety
and a longer lifetime. Maintenance should only be performed by an experienced valve maintenance
specialist & with knowledge of high performance butterfly valves. Normal maintenance for a Superseal
HPBV is limited to adjustment of the shaft packing by tightening down evenly on the gland flange using
the gland flange studs and nuts. Over tightening of the gland should be avoided since this will shorten
the life of the packing. During commissioning, it is common for dirt and foreign objects to be left in the
pipeline during construction. This debris can damage the HPBV seat or disc edge which will prevent the
valve from providing tight shut-off. In such cases seat replacement may be necessary.
- Inspect the body, disc and packing after the valve has been in service for a long period of time.
- Check the valve if any abnormal sounds or resistance is noticed during operation.
- Regularly ensure the tightness of each body bolt.
It is recommended that the valve be periodically at least partially stroked to ensure the valve functions
and will prevent seizure/galvanisation of any mating surfaces in stem chamber or seat area (or in the
case of resilient seats) memory moulding of the seat. Duration depends on service, criticality, etc.
However, it also must be factored in that if there are impurities or particulates in the line each operation
could reduce seat life proportionately.
Information in this IOM is only a general guide to serve as an example. The design is different depending
on size, class, seat option, trim type, body style, service & client specification. Refer the as-built drawing
for actual parts.
6.1 PACKING
Leakage from the packing area of the valve can be prevented by tightening of the gland flange’s nuts and
bolts. If the leakage doesn’t stop, packing replacement may be required instead. In this case, see 6.5 for
the method of packing replacement.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 13
The packing cannot be replaced when the valve is in-line!
6.2 SEAT RING/SEAT RETAINER
Before installation in the line, check the condition of the seat ring and the bolting tightness of the seat
retainer.
DIAGRAM 4
Upper Bush
Disc
Lock Pin
Stem
Lower Bush
Gasket
End Cover
Bolt
Gland Bolt/Nut
Gland Flange
Packing Gland
Packing
Body
Seat
Seat Retainer
Retainer Bolt
Indicative explosion only, design will vary depending on size, class, seating type, trim, end connections, etc. Refer to as-built drawing.
All repair work (disassembly and replacement etc.) of our valve should be performed by well-trained
maintenance personnel. Only an APV approved service centre should attempt major repairs. Our repair
centre can arrange reconditioning if required.
6.3 REMOVING VALVE FROM THE LINE
To repair a leaking valve, the valve must be removed from the pipeline and the parts dismantled as
below by experienced, qualified personnel:
- Shut down the line and ensure that there is no pressure in the pipeline.
- Drain all product from the pipe.
- Completely close the disc of the valve.
- Remove the valve from the pipe.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual14
DIAGRAM 5
Gasket
Heavy Hex Nut
Flange
Gasket
High Performance
Butterfly Valve
Stud Bolt
Flange
Heavy Hex Nut
FLOW
Indicative drawing only, design will vary according to size, class, trim and seating type, etc.
Packing leakage could result in personal injury. Valve packing is tightened prior to
shipping but may require adjustment to meet specific service conditions. If the fluid
is hazardous or toxic then proper protection is required before the removal of the
valve.
Always be sure that the valve is de-pressurised and isolated prior to performing
any maintenance work. Do not attempt to repair valve in-line if volatile, dangerous,
hazardous or flammable service.
Personal injury may result from sudden release of any process pressure. APV
recommends the use of protective clothing, gloves and eye wear when performing
any installation or maintenance.
Isolate the valve from the system and relieve pressure prior to performing
maintenance.
Disconnect any operating lines providing air pressure, control signals or electrical
power to actuators.

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 15
6.4 DISMANTLE THE SEAT RING & SEAT RETAINER
Reconditioning or internal repairs to the valve should only be undergone by an APV approved repairer.
This is only a general guide to serve as an example. The design is different depending on size, class, seat
option, service, etc. Refer the as-built drawing.
- Open the disc of valve (10~15 degree) with operating device.
- Remove the tightened retainer bolts on the seat retainer plate.
- Remove the seat retainer by lifting up with the jacking tap.
- Take out the inner seat. Be careful not to scratch or damage the seat ring. Clean the retainer plate and
seat as well as the other parts of the valve with a soft dust cloth or air blaster.
- Refer to Diagram 6 below for disassembly of the seat retainer & seat ring. There are numerous seat
ring designs & configurations, refer to 6.4.1 seating styles. This is only a generic indicative guide.
- Refer Table A below for retainer bolt torques. The lip-seal seal seat design in non firesafe configuration
up to 125 NB utilises an embedded clamp ring seat retainer in lieu of bolted insert. Refer to as-built
drawing.
DIAGRAM 6
Retainer Bolts
Seat Retainer
Seat Ring
Retainer Bolts
Turn the Disc
10~15 degree to open.
Indicative explosive view only, design will vary depending on size, class, trim, end connections, trim seating type, etc.
Table A
Bolt Size Carbon Steel Torque (N-m) Stainless Steel Torque (N-m)
#10 6 3
1/4” 19 8
5 /16” 41 15
3/8” 68 27
7/16” 109 41
1/2” 163 55

HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual16
6.4.1 Seating Styles
METAL TO METAL SEAT (FLEXIBLE FLO-SEAL STYLE) (FLEXIBLE LIP STYLE) (SOLID ENERGISED STYLE)
Energised
metal seat
Flexible
secondary
metal seat Seat
retainer
Gasket
Disc closed
Body
Pressure
Body
Retainer
Metal
seat
Disc closed
Disc closed
Gasket
Pressure
Preferential Installation
Direction Preferential Installation
Direction
Disc
Body Seat
Retainer
Plate
Seat
SS316
FIRESAFE SOFT SEAT (ENERGISED FLO-SEAL STYLE)
Firesafe
metal lip seal
O-ring core
Deep anchor
seat tail
Gasket
Disc open
Pressure
Resilient
seat
Disc closed
Disc closed Disc closed
Seat
retainer
Body
Pressure
Preferential Installation
Direction
SOFT SEAT (ENERGISED FLO-SEAL STYLE)
Disc closed
Disc open
Body
Disc closed
Disc closed Pressure
Pressure
Deep anchor
seat tail
Seat
retainer
O-ring core
Resilient
seat
Preferential Installation
Direction

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Australian Pipeline Valve - Installation, Operation and Maintenance Manual 17
SOFT SEAT (ENERGISED LIP-SEAL STYLE) FIRESAFE VERSION
SEAT
SEAT
Pressure Pressure
Disc closed Disc closed Disc closed
Body Body
Body
Seat
retainer Seat
retainer
Seat
retainer
Seat Seat Seat
Disc closed
Body Seat
retainer
Seat
(soft)
Gasket
Metal
seat
Preferential Installation
Direction
6.5 PACKING REPLACEMENT
For replacement of packing, please take the following steps:
a. Remove the Gland Flange after loosening the nuts of the gland flange.
b. Slightly lift the packing gland up and remove it.
c. Remove the packing using a packing extractor such as a screw or awl and gimlet.
d. When you remove the packing with tools (packing extractor), be careful not to scratch and damage the
packing housing wall or the valve stem because such damage may cause leakage.
e. Insert a new set of packing in the packing housing after carefully cleaning the packing housing.
f. After inserting the packing, assemble the packing gland and gland flange.
g. The nuts of gland flange should be tightened sufficiently. Be careful not to over tighten the nuts as this
may increase operating torque.
Diagram 7 & 7A are indicative. Refer to as-built drawing.
DIAGRAM 7 DIAGRAM 7A
Gland Bolt/Nut
Spring Washer
Gland Flange
Packing Gland
Packing Tools
(Screw)
Packing
Bush
Packing
Spacer/Bearing
Protector
Bearings
Gland
Ring
PACKING REPLACEMENT TOP BONNET PARTS

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Australian Pipeline Valve - Installation, Operation and Maintenance Manual18
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 a adjusting gasketed parts, APV
recommends installing a new gasket while reassembling. A proper seal is required
to ensure optimum operation.
Note
Over tightening of the bolts may cause thread damage.
6.6 END COVER REPLACEMENT
For replacement of packing, take the following steps:
a. Remove the bolts and end cover.
b. Remove the gasket.
c. After removing the gasket, clean the neck of the body prior to replacement of new gasket.
d. Insert the new gasket.
e. Put the end cover on & tighten the end cover bolts.
Diagram 8 & 8A are indicative. Refer to as-built drawing.
DIAGRAM 8 DIAGRAM 8A
Gasket
End Cover
Spring Washer
Endcover Bolt
Bearing
Thrust
Ring/
Spacer
Gasket
Bottom Bonnet Flange (where applicable) Bottom Bonnet Parts (where applicable)