Metso BO Series Operating and maintenance manual

High Performance
Butterfly Valve
Type BO
Installation, Maintenance and
Operating Instructions
2 BO 70 en • 11/2015

22 BO 70 en
Contents
1 GENERAL .........................................................................3
1.1 Safety precautions .............................................................3
1.2 Product & function description ...................................3
1.3 Intended use ........................................................................3
1.4 Scope of delivery ................................................................4
1.5 Visual inspection ................................................................4
1.6 Marking and identification ............................................4
1.7 ATEX, ASME & CE-marking ............................................. 5
1.8 Contact ....................................................................................5
2 TRANSPORT, RECEPTION AND STORAGE ................... 5
3 INSTALLATION ...............................................................5
3.1 Installation planning ........................................................5
3.2 Preliminary ............................................................................5
3.3 Installation .............................................................................6
3.4 ATEX-version ........................................................................7
3.5 Demounting .........................................................................8
3.6 Cleaning and maintenance interval ..........................8
4 DETACHING AND MOUNTING THE
ACTUATOR .....................................................................9
4.1 General ...................................................................................9
4.2 Mounting preperation......................................................9
4.3 Mounting ...............................................................................9
4.4 Detaching preperation ....................................................9
4.5 Detaching ..............................................................................9
5 TOOLS ............................................................................10
6 ORDERING SPARE PARTS ...........................................10
7 EXPLODED VIEW AND PARTS LIST ............................11
8 DIMENSIONS AND WEIGHTS ......................................12
9 TROUBLESHOOTING ................................................... 13
10 SAFETY INSTRUCTIONS ..............................................13
11 MAINTENANCE ............................................................ 14
11.1 Cleaning and maintenance interval ....................... 14
11.2 Preliminary ......................................................................... 14
11.3 Demounting ...................................................................... 14
11.4 Reassembly ........................................................................ 15
11.5 Replacement of the sealing element ..................... 15
11.6 Replacing wear parts ..................................................... 16
11.7 Valve screws – Clamping torque .............................. 18
12 TYPE CODE – HOW TO ORDER ....................................19
Please note any additional information for projects in addition to the IMO.

2 BO 70 en 3
1GENERAL
1.1 Safety precautions
1.2 Product & function description
High Performance Butterfly Valve Type BO; a single eccen-
tric disc to shut off pipes and regulate the flow; soft-seated.
Type of body:
□Type wafer
Nominal size:
□DN 200 - DN 900
□NPS 8 - NPS 36
Pressure rating:
□PN 10
□CL 150
□Operation pressure: max. 2bar
Temperature range for standard valves:
□Operating temperature-10 °C - +130 °C
□Store temperature -20 °C - +80 °C
Function description:
The High Performance Butterfly Valve Type BO has been
designed especially for deployment in pressure-changing
systems for oxygen production, where it is required to oper-
ate under extreme demanding conditions due to the high
cycle-related peak tightness requirements. The shut-off disc
is made of aluminium to minimize the disc inertia and give
the valve extremely short opening and closing times. An
elastic sealing ring has been chosen as the sealing element.
The actuator force will be transmitted to the drive shaft as
well as to the disc, by means of fatigue-resistant feather key
connections.
The valve is closed when the disk is in a rectangular position
to the flow direction. The passage between OPEN and
CLOSED amounts (90°) and the disk is driven by an actuator
(manual, electric, pneumatic or hydraulic). There is a mark-
ing on the drive shaft as well as on the body. The valve is
closed when the two markings are aligned.
The notch on the actuator shaft indicates the current posi-
tion of the shut-off disc in the valve. The valve closes clock-
wise.
1.3 Intended use
The delivered valve has been designed especially in accord-
ance with the requirements noted in the order-related
specification.
This especially applies to the operation parameter pressure,
temperature medium and cycle rates.
If the process parameter is exceeded, it can lead to damage
of the valve.
The damaged parts have to be changed immediately.
The pipeline and used medium must be free of dirt, other-
wise the tightness of the valve may be affected.
It is part of the intended use of the valve that the operating,
mounting and maintenance personnel have read and
understood this IMO manual.
CAUTION:
Do not exceed the valve performance limitations!
Exceeding the limitations marked on the valve may cause
damage and lead to uncontrolled pressure release.
Damage or personal injury may result.
CAUTION:
Do not dismantle the valve or remove it from the pipe-
line while the valve is pressurized!
Dismantling or removing a pressurized valve will result in
uncontrolled pressure release. Always isolate the relevant
part of the pipeline, release the pressure from the valve
and remove the medium before dismantling the valve. Be
aware of the type of medium involved. Protect people and
the environment from any harmful or poisonous sub-
stances. Make sure that no medium can enter the pipeline
during valve maintenance.
Failure to do this may result in damage or personal injury.
CAUTION:
Beware of the discs’ cutting movement!
Keep hands, other parts of the body, tools and other
objects out of the open flow port. Leave no foreign
objects inside the pipeline.
When the valve is actuated, the disc functions as a cutting
device. The position of the disc can also be changed
when moving the valve.
Close and detach the actuator pressure supply pipeline
for valve maintenance.
Failure to do this may result in damage or personal injury.
CAUTION:
Beware of noise emissions!
The valve may produce noise in the pipeline. The noise
level depends on the application. It can be measured or
calculated using Metso Nelprof valve-sizing software.
Observe the relevant work environment regulations on
noise emissions.
CAUTION:
Beware of a very cold or hot valve!
The valve body may be very cold or very hot during use.
Protect yourself against cold injuries or burns.
CAUTION:
When handling the valve or the valve package, bear in
mind its weight!
Never lift the valve or valve package by the actuator, posi-
tioner, limit switch or their piping.
Valve sizes DN 400 and over are equipped with lifting eye
bolts.
Place the lifting ropes securely around the valve body.
Advise caution when lifting because the disc may turn.
Damage or personal injury may result from falling parts.
NOTE:
Do not turn the disc more than 90° as this could damage
the seat. The valve is constructed so that the disc operates
only between 0°-90°.

42 BO 70 en
Only qualified personal may perform the installation work.
Metso will take no liability for structural modifications car-
ried out without the corporation’s explicit consent.
Use original spare parts only.
Spare parts should be installed by Metso service personnel.
The specific spare parts can be found in Chapter 7.
1.4 Scope of delivery
Normally the High Performance Butterfly Valve Type BO is
delivered complete with the actuator.
1.5 Visual inspection
Before leaving Metso, the valve has been checked for tight-
ness and functionality by Metso Quality Control and set for
operation in accordance with the order-related specifica-
tions.
1) Before installation, please check the valve for possible
transport damage. If parts of the delivery are dam-
aged, please contact our qualified personnel immedi-
ately.
2) Before installation, please check the valve for function-
ality.
Proceed as follows:
□Lifting ropes are necessary depending on the size and
weight of the valve.
Fasten the lifting ropes around the valve body (see Fig. 1)
for a horizontal transport position.
If you fix the ropes on the actuator, the shaft may be dam-
aged.
Figure 1
Fasten the lifting ropes only on the actuator for a verti-
cal transport position. (see Fig. 2)
Figure 2
□Visual inspection – all screws are tightened correctly
□Visual inspection for damage on the following parts:
□disc
□shaft
□actuator and tubing
□gland packing
□sealing elements
□sealing surface of the valve
□Bring the valve into a vertical position.
The valve can move uncontrolled during the check. For
this reason, ensure that the valve cannot move or even
tilt over under any circumstances.
Normally valid:
View from above on the drive shaft of the disk:
Counterclockwise rotation = OPEN, Clockwise rotation =
CLOSE (see
If the valve does not work correctly during the check, please
contact our professionals.
1.6 Marking and identification
Figure 3
CAUTION:
Danger of twisting!

2 BO 70 en 5
The valve specifications are placed on the type plate.
In the case of maintenance and repair, you need the
Unique-No. to reliably identify the valve.
This number is also engraved in the valve body, so you can
find it even if the type plate is not detectable.
Further information:
Job-No = Job number of Metso
Unique-No = Serial number of the valve
Type = Type code of the valve
Body = Body material
YEAR = Year of manufacture
NPS or DN = Size
CL or PN = Pressure class
ID-No. = Customer identification number
Tag-No = Valve number
TS. = Valve working temperature in °C
(medium)
PS = Valve working pressure
P.O.NO. = Customer’s order number / commission
number
Cv = Flow rate in gal/min
EX II 2GcTx = ATEX-marking
CE = CE0036 (notified body for PED)
To display the trim in the built-in condition of the valve, the
following markings are available (see Fig. 4):
□CLOSED-plate with marking on the body.
□marking on top of the drive shaft.
If both markings align, the valve is "CLOSED". The sealing
element is located on the side of the body where you see
the CLOSED-plate.
Open and close like a tap (seen from the actuator side).
1.7 ATEX, ASME & CE-marking
The valve meets the requirements of the European Direc-
tive 97/23/EC related to pressure equipment or the ASME B
16.34-2009, and has been marked according to these direc-
tives.
The ATEX, ASME and/or CE markings are placed on the type
plate (see Figure 3 ) in accordance with the specification of
the valve.
1.8 Contact
Please contact your local Metso on:
www.metso.com/valves
Figure 4 Direction of rotation of the actuator and disc
position
2 TRANSPORT, RECEPTION AND
STORAGE
Check the valve including the equipment for any damage
that may have occurred during transport.
Store the valve carefully before installation, preferably
indoors in a dry place..
Store temperature = -20° … 80 °C
Humidity 85% max (non-condensing)
The valve must be stored with the appropriate factory-
made flow port protectors.
The valve is usually delivered in the closed position.
A valve equipped with a spring-return actuator is delivered
in a position determined by the spring.
During storage, the valve must be lightly closed.
Do not transport the valve on-site until the installation is to
be executed.
Remove the flow port protectors before installation.
3 INSTALLATION
Only qualified personnel are permitted to perform
installation work on the valve!
3.1 Installation planning
Before installation, consider the following aspects:
□Install the valve so that the actuator is easy to access.
□Do not connect the power supply of the actuator (elec-
trical, pneumatic or hydraulic energy) until the installa-
tion of the valve is completed.
□The flange holes of both pipe ends must be exactly
aligned and the sealing surface of the opposing flanges
must be exactly parallel. The flange holes must not be
twisted against each other: this way, the installation will
not cause any stress in the valve.(see Figure 5)
Figure 5 Check the flange position before installing
3.2 Preliminary
Flush or blow the pipeline carefully before installing the
valve. Foreign particles such as sand, rust, dirt or welding
residues will affect the tightness of the valve and damage
the disc-sealing surface and seat. This is very important for
installation of valves in new plant sections. During the proc-
ess, the medium must also not carry any contaminant
which may settle in the sealing area.
Marking on the shaft extension
Marking on the driveshaft
Open against clockwise direction
Close in clockwise direction

62 BO 70 en
Caution advised when installing flaps with the safety
position “Spring-to-open”!
If the disc endures the total length of the valve, you must
close the disc prior to installation (pneumatic, hydraulic,
etc.). Be sure that the energy supply is safely fastened and
cannot suffer damage or break off during installation.
If there is a sudden shutdown of energy supply, the valve
will be opened abruptly by the prestressed spring package.
This may cause heavy personal injuries and material dam-
age.
If you mount a larger valve into the pipeline, you need a
hoist. You will find the weight of the valve package in the
order-related documentation.
Place the lifting ropes securely around the valve body
and not on the actuator. Otherwise, you may damage
the valve.
(see Figure 1).
3.3 Installation
For installation of the high performance butterfly valve,
proceed in the following manner:
□If no indication of the valve installation direction is
given, install the valve so that the valve shaft side is on
the upstream side.
□If the mounting direction is mentioned, install the valve
so that the P points to upstream and F points the direc-
tion of medium flow. (see Figure 6)
Figure 6
□Close the valve for installation. In the open position, the
disc-sealing surface can endure the total length of the
valve body, and may be damaged at installation.
□Please note that the minimum tube inside diameter is in
accordance with ASME B36.10M, ASME B36.19M respec-
tively DIN EN 10305-2 and DIN EN 10305-5.
□Insert on both sides of the valve, between the valve
body and the opposite flanges, a flange gasket in
accordance with your operating conditions. These gas-
kets are not included in the standard scope of delivery.
We deliver the desired gaskets on request.
□Piping bolt dimensions and amounts can be found in
the following tables:
stud bolt dimensions type BO - Class 150
stud bolt dimensions type BO - PN 10
NPS thread K LL1
length quantity length quantity
83/4"-9UNC 180 8
10 7/8"-9UNC 195 12
12 7/8"-9UNC 205 12
14 1"-8UN 230 8 95 8
16 1"-8UN 245 16
18 1 1/8"-8UN 260 12 115 8
20 1 1/8"-8UN 290 16 120 8
24 1 1/4"-8UN 330 16 130 8
28 1 1/4"-8UN 390 24 160 8
30 1 1/4"-8UN 420 24 170 8
32 1 1/2"-8UN 450 24 180 8
36 1 1/2"-8UN 480 28
40 1 1/2"-8UN 500 32
flange connection acc. to ANSI B 16.5 for NPS <= 24"
flange connection acc. to ASME B 16.47 for NPS > 24"
DN thread K L L1
length quantity length quantity
200 M20 170 12
250 M24 190 12
300 M24 200 12
350 M24 210 12 80 8
400 M27 230 16
450 M27 250 16 90 8
500 M30 270 16 105 8
600 M33 320 16 115 8
700 M33 340 20 125 8
750
800 M36 370 20 130 8
900 M36 390 24 140 8
1000 M39 425 24 160 8
flange connection acc. to EN 1092-2 PN 10

2 BO 70 en 7
Screw the each other opposite stud bolts, flange screws
and hex nuts crosswise and equal with a torque key in
accordance with the parameter of the operator. (see
Figure 7).
□Finally connect the energy supply.
Figure 7 Sample for a crosswise installation with twelve
flange holes.
3.4 ATEX-version
ATEX certified valves have to be professional connected by
the end user to a main grounding point at the site in
accordance with the applicable regulations of the respec-
tive countries. The grounding of the valve is the responsibil-
ity of the end user. Operation without grounding is not per-
mitted!
The grounding connection is a marked screw with the
Earthing symbol. This screw is a single, extra marked screw
at, e.g., the body, flange or bracket. (see Fig. 8)
The grounding cable must have a braided wire with at least
16mm2 conductive area to the grounding point in the pip-
ing construction.
ATEX certified valves must be serviced and maintained only
by Metso Service or authorized personnel.
Figure 8 Earthing
Pos.1 up to 5 must be supplied by client!
Metallic bright surface at the body, flange or bracket
(make sure the paint is scratched off to enable conductivity)
12
3
4
1 … hex head bolt
2 … grounding cable (min. 16 mm
2
)
3 … hex head bolt
4 … hex nut
5 … grounding rod
5

82 BO 70 en
3.5 Demounting
Make sure that:
□the pipeline is pressureless, flushed and empty.
□the valve mentioned is undocked from the process.
□The valve is in a defined position (normally closed).
For demounting the valve, proceed in the following order:
□Close the valve.
□If you detach the actuator to demount the valve, tag the
actuator to the valve body with a waterproof marker.
□This way you can easily find the correct position of the
actuator on reassembly, and the actuator cannot cause
a malfunction.
Further instructions for detaching the actuator in Chap-
ter 4!
Switch off the energy supply of the actuator.
□Detach the actuator.
□Support the valve carefully with a hoist. Place lifting
ropes in a correct position on the body (not on the shaft)
of the valve.(see Figure 10)
□Demount the valve by unscrewing the opposite pipe
flange bolts crosswise.
□Lift and transport the valve carefully to protect it from
damage.
Figure 9 Correct position of lifting ropes
3.6 Cleaning and maintenance interval
Type BO high performance butterfly valves are extensively
maintenance-free.
For cleaning, use only a soft and lint-free cloth. Do not
under any circumstances use pointed or sharp tools (knife,
file, screwdriver, etc…) or sandpaper. Similarly, do not use
any cleaning agents that may cause undesirable chemical
reactions with the residues of the medium or attack the
sealing elements.
Check the tightness of the valve at regular intervals.
You should replace the sealing element (320) after two
years at the latest.
At the same time, check the condition of the following
parts and change them if necessary:
O-rings (472, 474),
U-ring (475),
bearing bushings (410, 424)
After dismantling the valve, you must replace the lock-
ing plate (447).
For ordering the necessary spare parts set, please contact
your Metso Service Partner.
Figure 10 Sealings and bushes
CAUTION: Danger of explosion!
Follow the end user safety instructions!
424
447
475
475
474
472
410
320
474
424
472
411

2 BO 70 en 9
4 DETACHING AND MOUNTING THE
ACTUATOR
4.1 General
The actuator mounting is in accordance with DIN/ISO 5211.
All actuators based on this standard can be easily mounted
on the valve. Typical installations are for pneumatic- and
hydraulic actuators with valve controllers for control, ESD or
on/off use or with electric actuator or manual gear.
4.2 Mounting preperation
The actuator used is normally on customer request. For safe
mounting on site, you need a hoist and lifting ropes.
4.3 Mounting
To mount the actuator, proceed in the following order:
□Turn the valve to the closed position before mounting
the actuator.
□Position the indexing shaft of the actuator on the valve
shaft carefully. Bear in mind that the actuator must be
mounted exactly and flush to the bracket, so that no
stress is caused to the valve shaft.
□Make sure that the jag on the indexing shaft conforms
to the position of the disk (see Figure 12).
□Fix the actuator with the appropriate screws and lock
them crosswise. Finally, check the closed position of the
valve by means of multiple depth measurements. The
detected data must not deviate more than 0.3 mm (see
Figure 11).
□Finally, connect the energy supply.
Figure 11 Checking the closed position by means of depth
measurement
Figure 12 The markings on the actuator conform to the
position of the disk
4.4 Detaching preperation
If the actuator is mounted in a pipeline, the following condi-
tions must be ensured before starting to detach the actua-
tor:
□Make sure that detaching the actuator will not cause
any fault.
□Check carefully if a hot medium has been sent through
the pipeline and if the actuator has cooled down suffi-
ciently, so no danger exists due to extreme temperature.
□Make sure that the medium finally sent through the
valve does not cause any danger for the service techni-
cian.
If you do not execute the dismantling yourself, you must
alert the qualified personal.
4.5 Detaching
To detach the actuator, proceed in the following order:
□Make sure that the pipeline is pressureless and the men-
tioned valve is undocked from the process.
□Make sure the valve is in a defined position (normally
closed).
□Switch off the energy supply of the actuator.
□Support the actuator with lifting ropes.
□Unbolt the screws between the bracket and the actua-
tor. Pull the actuator carefully, vertical from the valve
shaft.
□Lift and transport the actuator carefully to protect it
from damage.
Make sure that the energy supply of the actuator is safely
switched off before starting to detach the actuator.
5 TOOLS
□No special tools are needed for servicing the valve.
6 ORDERING SPARE PARTS
When ordering spare parts, always include the following
information:
□Unique number of the valve (on the type plate – see Fig.
3 and additionally stamped on the valve body)
□Name of plant, date of start-up
□Type code (on the type plate – see Fig. 3) with informa-
tion about size and pressure
□If possible, a picture of the type plate
□Number of the parts list, part number, name of the part
and quantity required
CAUTION:
When handling the valve or the valve package, bear in
mind its weight!
The actuator cannot be removed from the valve when
the pipeline is under pressure as a result of dynamic
torque!
NOTE:
Before dismantling, carefully observe the position of the
valve with respect to the actuator and positioner/limit
switch to ensure that the package can be properly reas-
sembled.
The actuator must be mounted to be easily accessible,
particularly for a possible emergency manual override.
CAUTION:
When handling the actuator, bear in mind its weight!
Marking

10 2 BO 70 en
7 EXPLODED VIEW AND PARTS LIST
PARTS LIST
1&2) Maintenance after 750 000 cycles or every 1 year
3) Maintenance after 1500 000 cycles or every 2 year
Part No. Qty. Description Material Spare part
101 1 Body Carbon Steel
201 1 Disc Aluminium hard coated 3
301 1 Sealing Ring Stainless Steel 3
304 1 O-ring seal FKM 1
306 8 Cylinder head screw Stainless Steel
320 1 Seat FKM 2
401 1 Drive shaft Stainless Steel 3
402 1 Shaft Stainless Steel 3
404 2 Thrust bearing Metal + Teflon coating 1
410 1 Bearing bushing Stainless Steel 3
411 1 Bearing bushing Stainless Steel 3
412 8 Cylinder head screw Stainless Steel
424 2 Bearing Metal + Teflon coating 1
425 2 Bearing Metal + Teflon coating 1
430 1 Cover Stainless Steel
432 4 Hexagon screw Stainless Steel
435 4 Wascher, Retaining plate Stainless Steel
440 2 Key Stainless Steel 3
441 1 Key Stainless Steel 3
444 2 Clamping disc Stainless Steel 3
447 2 Lock Washer, Retaining plate Stainless Steel 3
448 4 Hexagon screw Stainless Steel 3
453 1 Packing Gland, Flange Stainless Steel
-462 2 Key Stainless Steel 3
472 4 O-ring packing FKM 1
474 2 O-ring packing FKM 1
475 2 Sealing PTFE 1
476 8 Bearing protection, Back up ring PTFE 1
502 4 Hexagon head screw Stainless Steel
507 2 Pin Stainless Steel
508 2 Retaining plate Stainless Steel
509 4 Hexagon nut Stainless Steel

2 BO 70 en 11
8 DIMENSIONS AND WEIGHTS
Type BO + A
Size DN/inch Actuator
Main dimensions Weight
BL H K L N B C J M Actuator
kg
Valve
kg
200/8" A60-K 71 250 245 435 300 170 85 320 885 16 28
250/10" A60-K 76 265 260 450 300 170 85 320 915 16 34
300/12" A60-K 83 290 285 475 300 170 85 320 965 16 49
350/14" A120-K 92 325 330 570 390 195 120 345 1095 28 58
400/16" A120-K 102 355 350 590 390 195 120 345 1145 28 72
450/18" A120-K 114 385 380 620 390 195 120 345 1205 28 108
500/20" A120-K 127 405 400 640 390 195 120 345 1245 29 134
600/24" A250-K 154 490 485 795 430 260 155 410 1485 51 187
700/28" A500-K 165 545 535 880 595 290 175 490 1625 100 262
750/30" A500-K 190 570 560 905 595 290 175 490 1675 100 310
800/32" A500-K 190 585 580 925 595 290 175 490 1710 100 360
900/36" A500-K 203 655 650 1075 750 400 215 600 1930 100 460

12 2 BO 70 en
9 TROUBLESHOOTING
Valve leakage at the shut-off disc
□No matter what the situation, do not close the valve by
force: irreparable damage may occur if you do so.
□Check that the energy supply is connected.
□Check that the closed position of the actuator is in
accordance with the closed position of the disc.
□Check that the torque of the valve is in accordance with
the following table. (see ???
□Check the sealing surface of the disc and the sealing ele-
ment for damages. If necessary, dismantle the disc.
□Check if there is foreign material between the disc and
the sealing element. If necessary, remove foreign mate-
rial or deposits.
□If necessary, replace the damaged parts
For dismounting see Appendix: maintenance.
Keep in mind the notes in Chapter “Cleaning and mainte-
nance“ in Appendix: maintenance.
Escape of fluid or gas…
at gland packing
Check if the gland is still precompressed by the disc springs.
The disc springs may be damaged. In this case, you must
change them. If the precompression is too minimal, you
must retighten the nuts, but not up to the stop: if you do so,
the disc springs will be damaged. If the precompression of
the disc springs is in order, the gland packing is damaged
and you must change it.
Please see notes for dismounting in Appendix: mainte-
nance.
at the cover plate
Check that all cover screws are tightened well. If necessary,
change the sealing.
Please see notes for dismounting in Appendix: mainte-
nance.
10 SAFETY INSTRUCTIONS
Please pay attention to the following safety instructions
when doing maintenance and when operating the high-
performance disc valve:
1. Because of safety reasons you are not allowed to carry
out modifications to the method of operation of the
disc valve or its actuator.
2. Only specialist personnel are allowed to carry out
installation work on the high-performance disc valve.
3. There is the danger during the functional test that the
high-performance disc valve will move uncontrollably
or suddenly due to the energy supply. Therefore, make
sure that the valve can under no circumstances move
or even tip during the functional test.
4. Take care during the installation of valves with the
safety position "spring open". If the disc extends over
the installation length of the valve, the valve must be
closed before installation (pneumatically, hydraulically,
etc.).
5. Make sure in particular that the energy supply is safely
attached and cannot be damaged or torn in any way
during installation.
If the energy supply is suddenly interrupted, the valve
opens abruptly. This can lead to severe injuries and
damage to materials.
6. During possible maintenance work, there is considera-
ble risk of injury by the accidental use of the remote
control. If you plan remote control for the work using
the high-performance disc valve, make sure that the
energy supply of the actuator is switched off.
7. Ensure that the cleaning substance cannot cause any
unwanted chemical reactions in connection with pos-
sible residues in the high-performance disc valve.
8. If you work in the area of the sealing surface of the
disc, secure the disc with wooden wedges to prevent
the risk of crushing. Take care that by doing this the
sealing surface of the disc is not damaged.
9. If the seals are destroyed by a medium which is too
hot, the medium used could leak at the shaft.

2 BO 70 en 13
11 MAINTENANCE
11.1 Cleaning and maintenance interval
Type BO high-performance disc valves are to a great extent
maintenance-free.
Check the valve regularly for tightness. Metso recom-
mends a replacement of the O-ring (320) on demand or
in critical applications after no more than two years.
Figure 15
If the medium has contamination which could impair the
tightness of the valve, the sealing surface of the disc must
be cleaned regularly. Contamination can damage the seal-
ing surface of the disc or the sealing element.
□Cleaning substances which could attack the sealing sur-
face or the sealing element must not be used to remove
residues. Use water, soap suds or other solvents and a
soft, lint-free cloth.
Never use cutting, scraping or grinding tools like files or
emery paper. Do not use substances containing sol-
vents: these can cause unwanted chemical reactions
with the residues of the medium or can attack the seal.
When allocating cleaning or maintenance work to qualified
outside companies or qualified outside personnel, draw
attention to the risk of the medium used and, if necessary,
the existing residues. The IMO must be sent.
11.2 Preliminary
In order to avoid longer shutdowns during the mainte-
nance work, suitable spare parts should be kept ready or
procured in time. Take delivery times and transportation
into account.
Before you dismount the disc valve, the following require-
ments must be complied with:
□Ensure that the pipeline is both free of pressure and free
of process gases and fluids.
□Check that the disc valve has cooled down or
warmed up enough so that there is no further risk of
extreme temperatures.
□Determine which medium passed through the disc
valve last. There could be residues in the valve. Make
sure that there is no risk of poison or acid when you
come into contact with the residues. Protect yourself if
necessary with the appropriate protective clothing, eye-
protection glasses and respiratory protection. The oper-
ator’s safety instructions must be followed.
□If you do not undertake the dismounting yourself,
inform the specialist personnel and, if necessary, make
protective clothing available for them.
□When installing and dismounting the disc valve, the
valve must be closed in order to eliminate damage dur-
ing installation and dismounting.
11.3 Demounting
When dismounting the disc valve, please proceed as fol-
lows:
□Close the disc valve.
□If the actuator must be removed from the disc valve,
mark the position of the actuator to the body with a per-
manent marker before dismounting. In this manner, you
can find the right position of the actuator when re-
mounting, and it cannot trigger a malfunction.
□Switch off the power supply of the actuator.
Dismount the actuator. For further instructions, see section
4.5 of this IMO.
□Support the disc valve with lifting ropes. Put the lifting
ropes on the body (and not on the shaft) of the disc
valve.(see Figure 16)
□Remove the disc valve by loosening the screws or nuts
(which are opposite) crosswise.
□Transport the disc valve in such a way that it cannot
move or suffer damage during transportation.
Figure 16 Supporting with lifting ropes
320

14 2 BO 70 en
11.4 Reassembly
To re-install the disc valve, please proceed as follows:
□Close the disc valve.
□At the end of the actuator shaft and on the shaft exten-
sion of the disc valve, there is a marking. The marking at
the actuator shaft must be in line with the marking on
the body when re-installing the valve.(see Figure 17)
When the markings are aligned, the valve is closed.
Figu 17 Installation markings
□Put the actuator in the closed position.
□Make sure that you place the actuator in the correct
position on the actuator shaft. Use the marking for this
that you made on the valve body as well as on the actu-
ator when you dismounted the valve, and ensure as
exact an alignment of all parts (body – actuator) as pos-
sible. (see Chapter 4)
□Install the disc valve between the pipelines (see
Chapter 3)
11.5 Replacement of the sealing element
Please proceed as follows:
Demount the valve in its CLOSED position. For further
instructions, see section 4.5 of this IMO.
1. Fix the valve on a solid base or workbench so that it
cannot slip or tip.
2. Turn the disk in the 180° open position.
Figure 18 180° open position
Marking on the valve body
Marking on the actuator shaft
301
320
306

2 BO 70 en 15
3. Loosen the hexagon head screws (306). (
see Figure 20-Figure 21).
Figure 19 Loosen the screws
Figure 20
4. Demount the retaining ring (301). (see Figure 22).
Fig. 21 Demount the retaining ring
5. Now you can remove the o-ring (320).
(Figure 23)
Figure 22 Remove Pos.320
6. Before replacing the o-ring, you must clean all parts
with care and diligence.
7. Before reassembly, check all parts for traces of wear.
Use Oxigenoex S4 for the hexagon head screws on the
thread of the screws. (See Figure 24-Figure 25)
Figure 23 Figure 24
8. Check the high performance disc valve for its tightness
and smooth operation before rere-installation. Instruc-
tions for installation are in Chapter 3.
11.6 Replacing wear parts
In order to replace the wear parts, proceed as follows:
1. Remove the actuator by loosening the hexagon head
screws (502).
2. Swivel the disc 180°to demount the sealing element
(320), as shown in section 11.5.
3. Now you have free access to the clamping discs (444),
retaining plates (447) and hexagon head screws (448),
which you can now loosen.
4. Demount the cover (430) on the backside of the valve.
Now you can remove the thrust bearing (404), shaft
(402) and bearing bushing (410).
5. On the front side (actuator side), remove the flange
(453). Now you can remove the thrust bearing (404),
shaft (401) and bearing bushing (411).
6. Now you have free access to all bearings and sealing
elements of the shafts.

16 2 BO 70 en
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31

2 BO 70 en 17
Now following parts can be changed with the recom-
mended spare part sets:
Customer gets always: set 1
set 1 + set 2
set 1 + set 2 + set 3
7. All parts must be cleaned accurately before reassem-
bly.
8. Check the shafts for wear. If you find grooves or other
damage, it is recommended that you replace the shafts
(401, 402).
9. The reassembly takes place in reverse order. To avoid
damage to the seals, install the bearing bushings (424,
425) and the shafts (401, 402) with extreme care.
10. Tighten the cover screws (412, 432) with a suitable
torque wrench to the given torques, in compliance
with section 11.6.
11. Check the high performance disc valve for its tightness
and smooth operation before re-installation. The
instructions for installation are in section 3.3
11.7 Valve screws – Clamping torque
The permissible clamping torque for screws of the category
A2-70.2 and A4-70 with standard metric thread should be in
accordance with DIN 13,
1) Values correspond to 100% of the 0.2%-tensile elastic limit
Quantity/
Valve Description Contents
1x Set 1 (Soft parts) Pos. 304, 320
1x Set 2 (Sealing) Pos. 404, 410, 411, 435, 447, 472,
474, 475, 476
1x Set 3 (Heavy
overhaul) Pos. 201, 301, 401, 402, 430
∅Tensile strength area Load 1)
Force on the shaft Preload force Clamping torque
AS in mm2Rp 0,2 in N Rmin N N Nm
M4 8,8 3951 6146 2489 2,13
M5 14,2 6390 9940 4026 4,19
M6 20,1 9045 14070 5698 7,3
M8 36,6 16470 25620 10376 17,5
M10 58,0 26100 40600 16443 35,2
M12 84,3 37935 59010 23899 60,3
M14 115,0 51750 80500 32603 95,8
M16 157,0 70650 109900 44510 146,2
M18 192,0 86400 134400 54432 203,1
M20 245,0 110250 171500 69458 285,7
M22 303,0 75750 151500 47723 212,4
M24 353,0 88250 176500 55598 273,9
M27 459,0 114750 229500 72293 405,3
M30 561,0 140250 280500 85358 549,0

18 2 BO 70 en
12 TYPE CODE – HOW TO ORDER
12345116
BO 200 C 5 5 / -
1. sign PRODUCT SERIES / DESIGN
BO
Standard temperature valve, eccentric soft seated
high cycle construction, typically used for oxygen plants: (VPSA) use
Available only as wafer (sign 4 = "5")
Actuator preferably flush-mounted (=no bracket)
2. sign SIZE
200, 250, 300, 350, 400, 500, 600, 700, 750, 800, 900
08", 10", 12", 14", 16", 20", 24", 28", 30", 32", 36"
3. sign CONSTRUCTION
C2 bearing cartridges (1 for driveshaft, 1for trunnion) with 2 bearings each
Emission protection with 2 x O-rings
4. sign CONSTRUCTION
5Eccentric disc, wafer construction
5. sign MATERIAL
Body disc seat
5DIN EN 1563
GJS-400 G-AlCu4Ti FKM
6. sign FLANGE
-
without sign according to valve body pressure rating
PN-rating (Size in metric)
EN1092-1
ASME-rating (Size in inches)
- ASME B 16.5 #150-#300 size 4 - 24,
- ASME B 16.47 Series A #150 size 26" -36"
BASME 16.47 Series B (size 26" and bigger), pls consult factory for suitability
JPN 10

2 BO 70 en 19

20 2 BO 70 en
Metso Flow Control Inc.
Europe, Vanha Porvoontie 229, P.O. Box 304, FI-01301 VANTAA, Finland. Tel. [phone]. Fax [phone]
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Middle East, Roundabout 8, Unit AB-07, P.O. Box 17175, Jebel Ali Freezone, Dubai, United Arab Emirates. Tel. [phone]. Fax [phone]
www.metso.com/valves