Spirax Sarco BSA3-BD User manual

IM-P184-19 CTLS Issue 4 1
BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
1. Safety information
2. General product information
3. Installation
4. Commissioning
5. Operation
6. Maintenance and spare parts
© Copyright 2023
Printed in GB
1846350/4
BSA3-BD and BSA6-BD
Bellows Sealed Stop Valves
Installation and Maintenance Instructions
IM- P184-19
CTLS Issue 4
DN300 shown

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
Safe operation of these products can only be guaranteed if they are properly installed, commissioned,
used and maintained by qualified personnel (see Section 1.11) in compliance with the operating
instructions. General installation and safety instructions for pipeline and plant construction, as
well as the proper use of tools and safety equipment must also be complied with.
1.1 Intended use
Referring to the Installation and Maintenance Instructions, name-plate and Technical Information
Sheet, check that the product is suitable for the intended use/application.
The products listed below comply with the requirements of the EU Pressure Equipment Directive
/ UK Pressure Equipment (Safety) Regulations and each carries the mark when so required.
The products fall within the following Pressure Equipment Directive (PED) categories:
Product Group 1
Gases
Group 2
Gases
Group 1
Liquids
Group 2
Liquids
BSA3-BD
PN16
DN200 212SEP
DN250 - DN300 322SEP
DN350 - DN400 3321
PN25
DN200 322SEP
DN250 3221
DN300 - DN400 3321
PN40
DN200 322SEP
DN250 3221
DN300 - DN400 3321
BSA6-DB
DN125 212SEP
DN150 - DN200 212SEP
DN125 212SEP
DN150 - DN200 212SEP
1. Safety information

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
i) The product has been specifically designed for use on steam, compressed air, water/condensate
which are in Group 2 of the above mentioned Pressure Equipment Directive.
ii) A number of products are supplied for the intention of the end user (or agent thereof) modifying
the flange configuration from that supplied. It is the responsibility of the organisation carrying
out the modification to do so in accordance with the internationally recognised flange standards
and to ensure that the design rating and operation of the product are not compromised. Spirax Sarco
will not be held responsible for any unapproved modification or consequential liability resulting
in failure to observe these requirements.
iii) Determine the correct installation situation and direction of fluid flow.
iv) Spirax Sarco products are not intended to withstand external stresses that may be induced by
any system to which they are fitted. It is the responsibility of the installer to consider these
stresses and take adequate precautions to minimise them.
v) Remove protection covers from all connections and protective film from all name-plates, where
appropriate, before installation on steam or other high temperature applications.
1.2 Access
Ensure safe access and if necessary a safe working platform (suitably guarded) before attempting
to work on the product. Arrange suitable lifting gear if required.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.4 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some previous time.
Consider: flammable materials, substances hazardous to health, extremes of temperature.
1.5 Hazardous environment around the product
Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases, extremes of
temperature, hot surfaces, fire hazard (e.g. during welding), excessive noise, moving machinery.
1.6 The system
Consider the effect on the complete system of the work proposed. Will any proposed action (e.g. closing
isolation valves, electrical isolation) put any other part of the system or any personnel at risk?
Dangers might include isolation of vents or protective devices or the rendering ineffective of
controls or alarms. Ensure isolation valves are turned on and off in a gradual way to avoid system
shocks.
1.7 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure. Consider double
isolation (double block and bleed) and the locking or labelling of closed valves. Do not assume
that the system has depressurised even when the pressure gauge indicates zero.
1.8 Temperature
Allow time for temperature to normalise after isolation to avoid the danger of burns.

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
1.9 Tools and consumables
Before starting work ensure that you have suitable tools and/or consumables available. Use only
genuine Spirax Sarco replacement parts.
1.10 Protective clothing
Consider whether you and/or others in the vicinity require any protective clothing to protect against
the hazards of, for example, chemicals, high/low temperature, radiation, noise, falling objects, and
dangers to eyes and face.
1.11 Permits to work
All work must be carried out or be supervised by a suitably competent person.
Installation and operating personnel should be trained in the correct use of the product according
to the Installation and Maintenance Instructions.
Where a formal 'permit to work' system is in force it must be complied with. Where there is no such
system, it is recommended that a responsible person should know what work is going on and,
where necessary, arrange to have an assistant whose primary responsibility is safety.
Post 'warning notices' if necessary.
1.12 Handling
Manual handling of large and/or heavy products may present a risk of injury. Lifting, pushing,
pulling, carrying or supporting a load by bodily force can cause injury particularly to the back.
You are advised to assess the risks taking into account the task, the individual, the load and the
working environment and use the appropriate handling method depending on the circumstances
of the work being done.
1.13 Residual hazards
In normal use the external surface of the product may be very hot. If used at the maximum permitted
operating conditions the surface temperature of some poducts may reach temperatures in excess
of 425 °C (797 °F).
Many products are not self-draining. Take due care when dismantling or removing the product from
an installation (refer to 'Maintenance instructions').
1.14 Freezing
Provision must be made to protect products which are not self-draining against frost damage in
environments where they may be exposed to temperatures below freezing point.
1.15 Safety information - Product specific
See the relevant Sections in the attached Installation and Maintenance Instructions for specific
details relating to these products.
Warning
The body/bonnet collar gaskets contain a thin stainless steel support ring which may cause physical
injury if they are not handled and disposed of carefully.
Care must be taken when opening and closing the handwheel to prevent any possible injury to the
hands from the locking screw.

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
1.16 Disposal
Unless otherwise stated in the Installation and Maintenance Instructions, this product is recyclable
and no ecological hazard is anticipated with its disposal providing due care is taken.
Please visit the Spirax Sarco product compliance web pages
https://www.spiraxsarco.com/product-compliance
for up to date information on any substances of concern that may be contained within this product.
Where no additional information is provided on the Spirax Sarco product compliance web page,
this product may be safely recycled and/or disposed providing due care is taken. Always check
your local recycling and disposal regulations.
1.17 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment Law, when
returning products to Spirax Sarco they must provide information on any hazards and the precautions
to be taken due to contamination residues or mechanical damage which may present a health,
safety or environmental risk. This information must be provided in writing including Health and
Safety data sheets relating to any substances identified as hazardous or potentially hazardous.

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
2.1 General description
A range of sealed, in-line stop valves having tri-ply bellows as standard throughout the range. These valves
have been designed for use on steam, gas, liquid, thermal oils, condensate and water systems.
The BSA3-BD is fitted with a flat, balanced pressure plug as standard.
The BSA3-BD and BSA6-BD are fitted with a flat, balanced pressure plug as standard.
Certification
The BSA3-BD and BSA6-BD body and bonnet are available with certification to EN 10204 3.1.
Note: All certification/inspection requirements must be stated at the time of order placement.
Note: For further technical information regarding this product range see TI-P184-18.
2.2 Sizes and pipe connections
BSA3-BD: DN200, DN250, DN300, DN350 and DN400 Flanged EN 1092 PN16, PN25 and PN40
BSA6-BD: DN125, DN150 and DN200 Flanged EN 1092 PN16 and PN25
2. General product information

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
Pressure/temperature limits - EN 12516-1
The product must not be
used in this region or
beyond the parameter of
the PMA or TMA of the
relative end connection.
A - B - B PN40
A - C - C PN25
A - D - D PN16
Temperature °C
Pressure bar g
0
0
100
200
300
400
10 20 30 40
A D
D
C
C
B
B
Steam saturation
curve
Fig. 1
DN200 and DN250 BSA3-BD
bellows sealed stop valves
Fig. 2
DN300 to DN400 BSA3-BD
bellows sealed stop valves
2.3 BSA3-BD

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
A - B - B PN40
Body design condition PN40
PMA Maximum allowable pressure 39 bar g @ 0 °C
TMA Maximum allowable temperature 400 °C @ 21.1 bar g
Minimum allowable temperature -10 °C
PMO Maximum operating pressure for saturated steam service 26.8 bar g
TMO Maximum operating temperature 400 °C @ 21.1 bar g
Minimum operating temperature -10 °C
Minimum operating pressure 0 bar g
Maximum differential pressure is limited to the PMO
Designed for a maximum cold hydraulic test pressure of: 60 bar g
A - C - C PN25
Body design condition PN25
PMA Maximum allowable pressure 24.4 bar g @ 0 °C
TMA Maximum allowable temperature 400 °C @ 13.2 bar g
Minimum allowable temperature -10 °C
PMO Maximum operating pressure for saturated steam service 17.5 bar g
TMO Maximum operating temperature 400 °C @ 13.2 bar g
Minimum operating temperature -10 °C
Minimum operating pressure 0 bar g
Maximum differential pressure is limited to the PMO
Designed for a maximum cold hydraulic test pressure of: 37.5 bar g
A - D - D PN16
Body design condition PN16
PMA Maximum allowable pressure 15.6 bar g @ 0 °C
TMA Maximum allowable temperature 400 °C @ 8.4 bar g
Minimum allowable temperature -10 °C
PMO Maximum operating pressure for saturated steam service 11.6 bar g
TMO Maximum operating temperature 400 °C @ 8.4 bar g
Minimum operating temperature -10 °C
Minimum operating pressure 0 bar g
Maximum differential pressure is limited to the PMO
Designed for a maximum cold hydraulic test pressure of: 24 bar g

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
Pressure/temperature limits - EN 12516-1
350
250
150
50
-10
400
300
200
100
0
0 5 10 15 20 25
A
B
Steam saturation curve
Temperature °C
C
CB
Pressure bar g
The product must
not be used in this
region or beyond the
parameter of the PMA
or TMA of the relative
end connection.
A - B - B PN25
A - C - C PN16
2.4 BSA6-BD
Fig. 3
DN125 to DN200 BSA6-BD
bellows sealed stop valves

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
A - B - B PN25
Body design condition PN25
PMA Maximum allowable pressure 25 bar g @ 50 °C
TMA Maximum allowable temperature 400 °C @ 14.7 bar g
Minimum allowable temperature -10 °C
PMO Maximum operating pressure for saturated steam service 18.58 bar g
TMO Maximum operating temperature 400 °C @ 14.7 bar g
Minimum operating temperature -10 °C
Minimum operating pressure 0 bar g
Maximum differential pressure is limited to the PMO
Designed for a maximum cold hydraulic test pressure of: 37.5 bar g
A - C - C PN16
Body design condition PN16
PMA Maximum allowable pressure 16 bar g @ 50 °C
TMA Maximum allowable temperature 400 °C @ 9.4 bar g
Minimum allowable temperature -10 °C
PMO Maximum operating pressure for saturated steam service 12.33 bar g
TMO Maximum operating temperature 400 °C @ 9.4 bar g
Minimum operating temperature -10 °C
Minimum operating pressure 0 bar g
Maximum differential pressure is limited to the PMO
Designed for a maximum cold hydraulic test pressure of: 24 bar g

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
2.5 Seat leakage
Disc to seat shut-off conforms to EN 12266-1 Rate A leakage.
2.6 Kv values
Please note that the Kv values for a valve supplied without a balanced disc are shown for comparison
purposes only.
All BSA3-BD and BSA6-BD valves will be supplied with a balanced disc.
BSA3-BD
DN200
Balanced
DN250
Balanced
DN300
Balanced
DN350
Balanced
DN400
Balanced
593 935 1264 1804 2362
BSA6-BD
DN125
Balanced
DN150
Balanced
DN200
Balanced
205 295 562
For conversion:
Cv (UK) = Kv x 0.963
Cv (US) = Kv x 1.156
2.7 To convert Kv to volume flowrate in m³/h:
= Kv x √ ∆P
Where: = Volume flow in cubic m/h √ ∆P = Pressure drop in bar

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
Note: Before actioning any installation observe the 'Safety information' in Section 1.
Referring to the Installation and Maintenance Instructions, name-plate and Technical Information Sheet,
check that the product is suitable for the intended installation:
3.1 Check materials, pressure and temperature and their maximum values. If the maximum operating
limit of the product is lower than that of the system in which it is being fitted, ensure that a safety
device is included in the system to prevent overpressurisation.
3.2 Remove the protective covers from all connections.
3.3 Install the valve in the direction of flow given by the arrow on the body. The preferred position is with
the spindle vertical. The valve can be installed from the vertical to the horizontal plane (see Figure 4).
3.5 When installed on steam systems a suitable steam trap should be fitted immediately upstream of the
isolation valve to drain condensate. This will ensure drainage of the pipe when the valve is closed,
and will prevent damage of the valve due to waterhammer. The drain trap should be either a ball float
(FT) or thermodynamic (TD) type. Correct condensate drainage of all upstream pipework is also vital.
3.6 Always open isolation valves slowly to avoid system shocks.
3.7 Note: It is advisable that when work is being carried out downstream of a valve installation, double
isolation (block and bleed) should be fitted. In addition when installed as the final valve in a pipeline,
as a safety precaution, a blanking plate or blank flange must be fitted to the outlet flange of the valve.
3. Installation
After installation or maintenance ensure that the system is fully functioning. Carry out tests on any alarms
or protective devices.
4. Commissioning

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
5.1 The bellows sealed isolation valve plays an important role in the conservation of energy by eliminating
fugitive stem seal emissions.
5.2 The valve is operated manually by a handwheel. Special care must be taken to ensure that the
movement is made in the correct direction.
To open the valve fully, it is recommended to turn the handwheel until the shaft is raised to the
maximum position, indicated by the (+) on the bonnet, then turn the handwheel clockwise an 1 to ¼
turn to remove any backlash. This is to prevent the possibility of attempting to force open a valve,
which is already fully open, resulting in damage to the stem, bellows unit or other components. Spirax
Sarco BSA valves are fitted with a position indicator which can be found on the stem, and should
align with the (+) or (-) on the bonnet support pillars. (+ = fully open/- = fully closed).
5.3 If valve 'keys' are used care must be taken not to use excessive force when opening or closing the
valve.
5. Operation

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
Fig. 4
Incorrect installation
Correct installation
Correct installation
Correct installation

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
All the internals of the bellows sealed valve can be replaced
Note: Before actioning any maintenance programme observe the 'Safety information' in Section 1.
Warning
The body/bonnet collar gaskets (9) contain a thin stainless steel support ring which may cause
physical injury if they are not handled and disposed of carefully.
6.1 Available spares
The spare parts available are shown in solid outline. Parts drawn in a grey line are not supplied as spares.
Available spares
Body / bonnet gasket and stem packing 15 and 9 (2 off)
Stem and bellows assembly 5, 6, 12, 14, 15 and 9 (2 off)
Disc (state full description of the valve) 4, 12, 13, 14, 15 and 9 (2 off)
How to order spares
Please note: for customer convenience spares are supplied in kits to ensure all the appropriate replacement
parts are supplied to carry out a specific maintenance task. e.g. when a stem/bellows assembly is ordered,
parts 5, 6, 12, 14, 15, and 9 (2 off) will be included in the kit.
Always order spares by using the description given in 'Available spares' and state the size and type of stop
valve.
Example: 1- Body/bonnet gasket and stem packing for a DN200 Spirax Sarco BSA3-BD PN40 bellows
sealed stop valve.
6.2 Maintenance
Before undertaking any maintenance on the valve, ensure that any pressure is isolated and safely vented
to atmospheric pressure. The valve should then be allowed to cool. When reassembling, ensure that all
joint faces are clean.
6. Maintenance and spare parts

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
Fig. 5
DN125 and DN250
Fig. 6
DN300 to DN400
6
4
15
5
9
13
14
6
4
15
5
9
13
14
10
1
1
7, 8
7, 8
10
2
2
11
12
11
12

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
6.3 How to fit the body/bonnet gaskets
This can be carried out whilst the valve is connected in the pipeline. Remove the valve bonnet (2) from the
body (1) by unscrewing bonnet studs/nuts (7, 8). The body gasket (9) is now visible and can quickly be
replaced. Ensure the gasket face in the body (1) is clean before fitting a replacement.
To replace the second gasket (9) which is situated between the bonnet (2) and the stainless steel bellows
support collar, firstly remove the clip-on position indicator. Rotate the handwheel (10) in a clockwise
direction. This pushes the main stem (6) downwards and creates a gap between the bellows support collar
and the bonnet (2). If the support collar remains attached to the bonnet (2), gently prise the collar away
from the bonnet being careful not to damage the collar.
Do not allow the bellows to stretch as this can reduce the bellows life.
By continually rotating the handwheel (10) in a clockwise direction, the stem (6) can be unscrewed from
the bonnet bush. When the stem (6) is disconnected from the bonnet bush, unscrew the gland nut and
remove both this and the gland washer. Keep these parts safe as they are not supplied as spares. The
stem/bellows assembly (6, 5) can now be withdrawn out of the bonnet (2) . The second bellows collar
gasket (9) can now be replaced - ensuring both the bellows support collar surface and bonnet surface are
clean and the gasket is accurately located. Before the stem/bellows assembly (6, 5) is reassembled into
the bonnet (2), the stem packing ring (15) should be replaced (see Section 6.4).
6.4 How to fit the stem packing
By following through Section 6.3 it is now possible to replace the stem packing ring (15). Two of these
rings are provided in the spares kit but only one is required. Ensure all of the old stem packing material is
removed from the bonnet cavity and all locating surfaces are clean. Valve assembly is the opposite to
removal - remembering to fit a bellows collar gasket between the collar and the valve bonnet. Ensure the
solid stem pin (which is pressed into the stem) is aligned with the slot inside the bonnet. Before screwing
the end of the stem into the bonnet bush remember to fit a new stem packing ring (15), the original gland
washer and gland nut over the stem. Do not allow the stem thread to damage the inner surface of the
gland packing ring. Carefully slide the new packing ring down the stem into the cavity and slide the
original gland washer on top of the packing ring. Remember to tighten the gland packing ring after the
valve has been fully assembled.
6.5 How to fit the stem and bellows assembly
By following through Section 6.3 it is now possible to fit a new stem/bellows assembly (6, 5). Fitting this
is opposite to removal - remembering to fit a bellows collar gasket (9) between the bellows support collar
and valve bonnet (2). Ensure the bellows collar gasket (9) is accurately located. Before fitting the new
stem/bellows assembly (6, 5) into the bonnet (2), apply a small amount of lubricating compound such as
Gulf Sovereign LC grease to the end of the stem pin (which is pressed into the stem). Ensure the stem pin
is aligned with the slot inside the bonnet. Carefully slide the stem up through the bonnet. Before screwing
the end of the stem into the bonnet bush remember to fit a new stem packing ring (15) (see Section 6.4),
the original gland washer and gland nut over the stem (6). Do not allow the stem thread to damage the
inner surface of the gland packing ring. Carefully slide the new packing ring down the stem into the
cavity and slide the original gland washer on top of the packing ring (15). Remember to tighten the gland
packing ring after the valve has been fully assembled.

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BSA3-BD and BSA6-BD Bellows Sealed Stop Valves
Fig. 7
DN125 and DN250
Fig. 8
DN300 to DN400
6
4
15
5
9
13
14
6
4
15
5
9
13
14
10
1
1
10
2
2
11
12
11
12
7, 8
7, 8

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6.6 How to fit the disc
By following through Section 6.3 it is now possible to replace the valve's disc. To replace the disc (4) simply
remove the old stem pin and replace the disc (4). Attach the new disc with the new stem pin (supplied).
Where the disc (4) is attached using a retaining nut and collet arrangement, simply prise the crimped skirt
away from the retaining nut and unscrew. Remove the collets remembering to save these and the retaining
nut as they are not supplied as spares. Fitting is the opposite to removal but ensure the collets and threads
are lightly greased with lubricating compound such as Molybdenum Sulphide.
If a new disc is being fitted then crimp the collet retaining nut securely across two corners by deforming
the disc's thin metal skirt. If the original disc is being fitted then re-crimp using a fresh part of the skirt.
6.7 Final assembly
Ensure the bellows support collar and gaskets (9) are accurately aligned with the bonnet (2) before final
assembly into the body (1).
Tighten the bonnet studs/nuts (7, 8) evenly to the recommended tightening torque (See Table 1).
Table 1 Recommended tightening torques
Item 7 and 8 Bonnet bolts and nuts
BSA3-BD
DN200 250 - 260 N m
DN250 and DN300 330 - 340 N m
DN350 and DN400 490 - 500 N m
BSA6-BD
DN125 250 - 260 N m
DN150 330 - 340 N m
DN200 490 - 500 N m