Parker Bestobell Valves IOM 002 User manual

Date of Issue: 19 August 2021 Page 1 of 24 QF 80: Issue 2
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Installation, Operation and
Maintenance Manual
Reference Number:
IOM 002
Date:
19 August 2021
Issue:
C
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd

Date of Issue: 19 August 2021 Page 2 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
WARNING!
BEFORE ANY INSTALLATION AND MAINTENANCE WORK CAN
COMMENCE ENSURE THE VALVE AND SURROUNDING SYSTEM IS
DRAINED OF PRESSURE AND ISOLATED.

Date of Issue: 19 August 2021 Page 3 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Contents
Disclaimer.......................................................................................................................... 4
Introduction........................................................................................................................ 5
Outline............................................................................................................................................5
Safety..............................................................................................................................................5
Cleanliness ...................................................................................................................................6
Service Intervals..........................................................................................................................7
Installation.....................................................................................................................................7
Installation Overview..................................................................................................................7
Preparation ...................................................................................................................................9
Hardware Description..............................................................................................................10
Installation and Maintenance........................................................................................ 11
Spares Kit....................................................................................................................................11
Torque Table..............................................................................................................................12
Installation Method ...................................................................................................................12
Refit / Refurbishment Method...............................................................................................15
Troubleshooting.............................................................................................................. 22
Contact Details ............................................................................................................... 23
Service Record............................................................................................................... 23

Date of Issue: 19 August 2021 Page 4 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Disclaimer
PLEASE NOTE:
If the valves produced by Bestobell Valves/LNG are refurbished by a third party organisation that is
not approved by Bestobell Valves/LNG, then the safety and performance will not be guaranteed and
the warranty may be invalid.
If unsure about the installation and operation procedures for this valve, please contact Bestobell
Valves/LNG.
Bestobell Valves has produced this manual in order to provide engineering personnel with sufficient
general information to enable the operation, installation and effective maintenance of the valve
manufactured by Bestobell Valves.
In the interest of product development, the designs and specifications for our products are constantly
under review and we therefore reserve the right to make changes and improvements without notice.
This manual and the copyright therein are the property of PARKER HANNIFIN MANUFACTURING
LTD and all information that it contains is confidential.
This manual must not be reproduced or disclosed nor must any information taken there from be
disclosed, without prior consent in writing of PARKER HANNIFIN MANUFACTURING LTD.
This document has been authorised for use by:
Name:
Title:
Signed:
Date:

Date of Issue: 19 August 2021 Page 5 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Introduction
Outline
This manual is broken down into separate sections:
•Introduction
This section provides information about important safety requirements as well as highlighting
the precautions taken at Bestobell Valves to ensure the cleanliness of our products. Details
regarding servicing are also introduced.
•Installation
This details the method of installing the valve on site, and includes information on storage,
unpacking and inspection. Preparation of the valve and site is also discussed to allow ease of
installation and operation.
•Hardware Description
Introduces the product as well as providing a more detailed description including operating
conditions and suitable media. Any further requirements for the effective operation of the valve
are also discussed.
•Maintenance
Provides information relating to the on-site maintenance of the supplied valve, as well as
discussing common problems and solutions.
Safety
Read and understand these instructions before installing the valve. Improper installation,
operation or maintenance by the owner or operator of this valve can result in personal injury.
Only use genuine Bestobell Valves spares to ensure safe and optimum performance.
Prior to the installation of the valve into the system and any maintenance work, ensure the system is
de-pressurised and isolated for the duration of the installation and during any subsequent
maintenance.
The valve must be installed within a system that has adequate draining and venting provisions.
In cryogenic applications the area of pipe-work to receive the valve must be allowed to reach ambient
temperature.
It is essential that the installers and operators are conversant with all of the safety issues relating to
the medium within the system, and are fully trained to an adequate standard.
Wear safety glasses and gloves during any installation or operation of the valve.

Date of Issue: 19 August 2021 Page 6 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Valves must only be used in a circuit protected by suitable equipment.
The valve should be inspected for wear as part of a regular system maintenance programme.
Cryogenic burns can occur if the valve is handled during or after the valve has operated.
Minor leaks from the outlet side of the valve, if allowed to build up in a confined area, can be
hazardous. This can be avoided by dissipating into the atmosphere or a well ventilated area.
If valve is to be installed in hazardous climatic conditions or seismic areas, please inform Bestobell
Valves Ltd.
Identify the intended flow direction and match the valve orientation with its flow direction arrow.
Ensure that all end connections to the valve are in line and that the pipe work is supported to reduce
unwanted stresses, loading and vibration on the valve and system pipe work.
Ensure that all joining materials / components used during the installation of the valve are compatible,
and will not cause any deterioration to the valve structure.
When using on CO2, the internal atmosphere must be dry and moisture free as any bronze
components could be affected by carbonic acid.
DO NOT check leaks with hands.
Cleanliness
Immediately after assembly in a controlled clean room, the valve is sealed in an airtight plastic bag to
maintain cleanliness. As such, it is essential to maintain this cleanliness throughout all stages of
installation. Particular care should be taken not to contaminate the internals of the valve with grease,
moisture, grinding dust, weld/brazing spatter etc.
Clean practices will save time later with reduced ‘flushing’ and maintenance.

Date of Issue: 19 August 2021 Page 7 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Service Intervals
Bestobell Valves recommends that a major service is carried out on its valves in line with the
procedures contained in this manual every 2 years.
In addition to this, a regular inspection should take place to ensure correct operational condition.
Regular inspections are suggested on a monthly basis and maintenance work should be carried out
in line with this service manual.
It is recommended that the Service Record Sheet enclosed be fully completed at every service
interval.
Installation
Personnel carrying out Assembly / Joining / Welding / Inspection must be adequately trained and hold
the necessary approvals.
Valves should be installed in a vertical position.
Ensure that environmental conditions (atmospheric pollution) are compatible with the valve materials.
(NOTE: Ensure there is enough space around the valves installed position to allow the removal and
refit of the headwork / valve)
Installation Overview
The quality of performance in service is a function of the care taken to ensure good installation. A
careful study of these instructions is therefore recommended, as properly installed equipment will
normally operate for long periods without problems.
The most critical point in the lifetime of a valve is the time of installation, therefore, proper care at this
stage and during any maintenance will increase the probability of trouble free valve service.
It is important to maintain cleanliness throughout all stages of the installation, with particular care
being taken not to contaminate the internals of the valve with grease, moisture, grinding dust, weld /
brazing spatter or other foreign matter.
Clean practices will save time later with reduced ‘flushing’ and maintenance.

Date of Issue: 19 August 2021 Page 8 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
STORAGE:
The equipment packing cases are NOT waterproof and should be stored in a weatherproof location
before use.
UNPACKING:
It is recommended that before any item is unpacked, it should be moved as close as possible to its
installed position. This will minimise the possibility of damage during handling.
Before unpacking, items should be checked to ensure their part number is in line with requirements
and/or the purchase order.
The valve should be inspected for damage upon receipt - any problems are to be immediately
reported to Bestobell. This should be done within 48 hours of receipt of goods otherwise a warranty
claim may be rejected.
It is further recommended that each item should only be unpacked immediately before it is required.
Before installation the engineer should check for:
•Damaged Packaging
•Bent or Distorted Items
•Scratches, Dents or Damage
Particular attention should be paid to the sealing faces on the end connection flanges.
TOOLS REQUIRED:
No special tooling is required for the installation of this valve.

Date of Issue: 19 August 2021 Page 9 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Preparation
WARNING!
BEFORE ANY INSTALLATION AND MAINTENANCE WORK CAN
COMMENCE ENSURE THE VALVE AND SURROUNDING SYSTEM IS
DRAINED OF PRESSURE AND ISOLATED.
Remove the headwork before installation and cover the top of the body to protect the internals of the
valve from particulate contamination.
Also ensure that enough room is left above / around the valve for the headwork once this is replaced
after installation.
Identify the intended flow direction and match the valve orientation with its flow direction arrow.
Ensure that all end connections to the valve are in line and that the pipe work is supported to reduce
unwanted stresses, loading and vibration on the valve and system pipe work.
Ensure that all joining materials / components used during the installation of the valve are compatible,
and will not cause any deterioration to the valve structure.

Date of Issue: 19 August 2021 Page 10 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Hardware Description
All materials used are selected for their suitability to function at cryogenic temperatures. All valves are
degreased for oxygen duty, assembled in clean room conditions, and sealed in robust polythene bags
prior to despatch.
Maximum Working Pressure: ####
Temperature Range: +65°C to –196°C (-253°C for stainless steel versions) or + 150°F to -320°F
Only suitable for operation with media: - O2, N2, Ar, CO2, CH4, He, CHF, Kr, Ne, He, H2, C2H4, N2O,
SF6, LPG, LNG
When using on CO2, the internal atmosphere must be dry and
moisture free as bronze could be affected by carbonic acid.
These Globe Valves are supplied with stainless steel bodies (bolted
bonnet only) and bronze bodies (bolted bonnet and union bonnet)
extended and non-extended stems, with integral seat and
renewable PTFE disc, complete with bronze internals.
Available with socket weld and butt weld ends, sockets for copper
pipes and screwed female ends. The valve is of the cone seat
design for drop tight shut off. The bolted bonnet version allows
easy maintenance, even in confined spaces with lower bolting
torques required than for an equivalent size union bonnet valve.
The valve is operated by a hand wheel. The hand wheel is turned
clockwise to close the valve and anti-clockwise to open.

Date of Issue: 19 August 2021 Page 11 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Installation and Maintenance
Spares Kit
Handwheel, separate gasket and full headwork are also available upon request.
Please contact Bestobell Valves for specific part numbers
Reference
Description
Spares Kit
1
Wiper Seal
Contact
Bestobell Valves
Technical Sales
2
Chevron Top
3
‘O’ Seal
2a
Chevron Top
4
Chevron Bottom
5
Gasket
6
Valve Seal Flat
7
Anti-Friction Disc
1
2
3
2a
4
5
6
7

Date of Issue: 19 August 2021 Page 12 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Torque Table
•Apply torques across corners with a final tightening to avoid collar being set
incorrectly in socket.
•Only use PTFE based lubricants.
•Torque specified is for lubricated Stainless Steel fasteners.
•On Cryogenic applications, ONLY use specified Stainless Steel fasteners.
•Torques specified for valves with PTFE body / bonnet gaskets.
Installation Method
* PLEASE NOTE: The preferred orientation of the valve is vertical. If the valve has to be
installed at an angle, it should not be less than 30° from the horizontal.
Progressively slacken the bonnet bolts in sequence to preserve conditions of internal
gasket.
Remove the headwork before installation and cover the top of the body to protect the
internals of the valve from particulate contamination. Fully open the valve before removing
the headwork and remember to keep clean i.e. place in original bag and protect the
exposed PTFE face.
Valve Size
Disc Retaining Nut
Gland Nut
Bolted Bonnet
Union Nut
DN6 (¼“)
M5
2.5 NM (1.8 lb.ft)
16 NM (12 lb.ft)
M8
16 NM (12lb.ft)
48 NM (35 lb.ft)
DN10 (3/8“)
DN15 (½“)
DN20 (¾“)
M6
5 NM (3.7 lb.ft)
M10
32 NM (24 lb.ft)
54 NM (40 lb.ft)
DN25 (1”)
M8
12 NM (8.8 lb.ft)
68 NM (50 lb.ft)
DN40 (1½“)
M10
20 NM (14.7 lb.ft)
32 NM (24 lb.ft)
M12
57 NM (42 lb.ft)
150 NM (111 lb.ft)
DN50 (2”)
M12
37 NM (27 lb.ft)
M16
120 NM (90 lb.ft)
305 NM (225 lb.ft)

Date of Issue: 19 August 2021 Page 13 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Identify the intended flow direction and note the valves flow direction, indicated by the flow
direction arrow on the valve body.
Ensure all end connections to the valve are in line and that pipe work is supported to
reduce unwanted stresses / loading and vibration on the valve and system pipe work.
Ensure that all joining materials / components used during the installation of the valve are
compatible and will not cause any deterioration to the valve structure.
Taper threaded end connections:
For valves with taper threaded end connections a good quality PTFE thread tape may be
used.
Firstly tighten end connections by hand to reduce risk of cross threads before finally
tightening with a suitable torque wrench. (See torque graph for Female taper threads).
For bolted bonnet type valve i.e. 4 retaining cap screws:
Progressively slacken screws in sequence to preserve conditions of internal gasket.
For union bonnet type valve:
Slacken locking grub screw before removing union nut.
Remember to keep headwork clean i.e. place in original bag.
MAX TORQUE FOR BSP TAPER ENDS
0
50
100
150
200
250
010 20 30 40 50 60
VALVE DIAMETER (MM)
TORQUE (NM)
Torque (NM)

Date of Issue: 19 August 2021 Page 14 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Step 1 Flanged end connections:
Tighten flange fasteners progressively and in sequence, at the same time as checking
alignment of mating flanges.
Step 2 Welded / Brazed End Connections:
After completing and checking the welded / brazed end connections, ensure the internal
seat surfaces are clean and system pipe work is thoroughly flushed in preparation for re-
fitting the headwork.
Step 3 Refitting the Headwork:
Bolted Bonnet
Refit the headwork (ensuring the disc is in the open position and replace any damaged
gaskets) and secure in place using the capscrews removed earlier. Tighten to the torques
on page 12.
Union Bonnet
Refit the headwork (ensuring the disc is in the open position and replace any damaged
gaskets) and secure in place using the union nut removed earlier. Tighten to the torques on
page 12. When torqued in position, re-tighten the locking grubscrew in the side of the union
nut.
Step 4 Testing:
Before introducing pressure to the valve, carry out a thorough inspection of all connections:
welded and/or threaded. Once pressure is introduced to the valve, a method appropriate to
the medium being carried by the system should be employed to test for leaks.
Never use hands to test for leaks!
Step 5 (Operation):
Check that the valve fully opens (anti-clockwise) and closes (clockwise) smoothly by hand. If difficulty
is experienced, refer to the troubleshooting section of this manual.
Note: If unsure about the installation and operation of this valve please contact Bestobell
Valves before you continue.

Date of Issue: 19 August 2021 Page 15 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Refit / Refurbishment Method
STEP 1:
Whilst the valve is still in the service line, isolate it and drain off
pressure.
Unscrew the hand wheel retaining nut, lift off the label and save
both parts in a safe place.
STEP 2:
Lift off the hand wheel taking care not to damage the end of the
stem.
Store the hand wheel in a safe place.
STEP 3:
Using the appropriately sized spanner; unscrew the gland locknut.
PLEASE NOTE:
Depending upon the size of valve and the
materials it is constructed from, the bonnet
can be either a bolted or union joint.
The seat design also varies and could be
either a cone or flat seat; therefore the
refurbishment method will vary.
Union Nut
Bolted
Bonnet
Cone Seat
Flat Seat

Date of Issue: 19 August 2021 Page 16 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
STEP 5:
Remove the gland nut and store this in a safe place.
STEP 7:
Remove the four securing screws and washers from the bonnet.
GO TO STEP 9
STEP 6:
Remove the wiper seal and discard.
Remove the gland follower and store in a safe place.
For Stainless Steel valves: GO TO STEP 7
For Bronze Valves: GO TO STEP 8
STEP 4:
Unscrew the gland nut.
Remove any debris from the stem.
WARNING
Before any installation & maintenance work can
commence; ensure the valve and surrounding system is
drained of pressure and isolated.

Date of Issue: 19 August 2021 Page 17 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
STEP 8:
Remove the grub screw from the union nut.
Loosen and remove the union bonnet.
GO TO STEP 9
STEP 10:
Remove the stem from the cover.
NOTE: Depending on the style of the seat, the method for replacing
the disc seal will vary.
For cone seats: GO TO STEP 11
For flat seats: GO TO STEP 12
STEP 9:
Remove the headwork from the body.
STEP 11:
Carefully remove the circlip from the end of the disc holder, taking
care not to damage the seal groove and store in a safe place.
Then remove the disc seal and discard.
Note - old seal (ptfe) is black and the replacement seal (pctfe) is
white on sizes 1½”.
GO TO STEP 13

Date of Issue: 19 August 2021 Page 18 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
STEP 14:
Replace the seal retaining circlip and ensure that it is seated
correctly in the groove.
GO TO STEP 16
STEP 12:
Remove the lock nut(s) from the disc holder. Remove the seal
retainer and store in a safe place.
Remove the disc seal and discard.
GO TO STEP 13
STEP 13:
Replace the disc seal with the new one from the spares kit.
For cone seats: GO TO STEP 13
For flat seats: GO TO STEP 14
STEP 15:
Replace the seal retainer and secure in place with the lock nut(s)
removed earlier. Tighten to the torques shown on page 12.

Date of Issue: 19 August 2021 Page 19 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
STEP 17:
Clean the washers and spring.
Discard the original gland packing and replace with the new packing
from the spares kit.
Arrange as shown and re-insert into the gland.
NOTE: Ensure the ‘O’ seal is fitted into the top chevron.
STEP 18:
Re-insert the stem into the cover.
Clean the gland follower and replace the lip seal using the new one
from the spares kit. Slide these down the stem into the gland after
the gland packing.
STEP 19:
Screw on the gland nut after the gland follower.
Tighten to the torque shown on page 12 using a calibrated torque
wrench.
STEP 16:
Remove the gland packing, washers and spring from the inside of
the gland area. Take care not to scratch the inside of the gland
area.

Date of Issue: 19 August 2021 Page 20 of 24 QF 80: Issue 2
Parker Hannifin –Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: [phone] Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
STEP 20:
Replace the gasket in the body with the new one from the spares
kit.
Remove and discard the old gasket.
STEP 21:
Before replacing the headwork, ensure the disc is in the open
position by rotating the hand-wheel anti-clockwise.
Replace the headwork on the body with the disc in the open position
so as not to damage the inside of the body and disc/seal.
STEP 22:
Bolted Bonnet
Slide the loose bonnet flange over the top of the cover and secure
by hand by screwing in the four securing screws and washers.
Tighten to the torques shown on page 12 using a calibrated torque
wrench. Gradually tighten each screw, frequently switching to
opposite corners to ensure equal gasket loading.
STEP 22A:
Union Bonnet
Slide the union nut over the top of the cover and secure by hand,
then torque into position using the torque figures on page 12, using
a calibrated torque wrench.
Then tighten the locking grubscrew in the side of the union nut.