MOUNTING AND
OPERATING INSTRUCTIONSEB 14bTranslation of the original manualControl and shut-off valve BR 14b and BR 14c
DIN and ANSI version
to combine with actuators
January 2024 edition

PFEIFFER Chemie-Armaturenbau GmbH · Hooghe Weg 41 · 47906 Kempen · Germany
Phone: +49 2152 2005-0 · Fax: +49 2152 1580
sales-pfeiffer-de@samsongroup.com · www.pfeiffer-armaturen.com

Note regarding this installation and operating manualThis Installation and Operating Manual (EB) provides guidance
for safe assembly and operation.
The notes and instructions in this EB are binding when handling
PFEIFFER devices. The figures and illustrations in this EB are examples and must therefore be considered as such.
Ö For safe and correct use, read this EB carefully prior to use
and keep it for later reference.
Ö In the case of questions that go beyond the scope of this EB,
please contact the After Sales Service at PFEIFFER ChemieArmaturenbau GmbH.
Ö This manual only applies to the butterfly valve itself, the respective additional manual applies for the mounted actuator.

Definition of signal words
DANGER
Hazardous situations that lead to death or serious injuries

WARNING
Situations that can lead to death or serious injuries

NOTE
Property damage and malfunctions

Info
Additional information

Tip
Recommended action

EB 14b_EN
January 2024 edition
Subject to technical changes

Content

Content
1

Safety instructions and safety measures

1-1

1.1

Notes regarding possible severe personnel injury

1-2

1.2

Notes regarding possible personnel injury

1-2

1.3

Notes regarding possible property damage

1-3

1.4

Warning notes on the device

1-4

2Markings on the device

2-1

2.1

Butterfly valve type plate

2-2

2.2

Actuator type plate

2-2

2.3

Turning direction notice sign

2-2

3

Design and principle of operation

3-1

3.1

Variants

3-1

3.2

Additional fittings

3-1

3.3

Attachments

3-2

3.4

Technical data

3-2

3.5

Butterfly valve assembly

3-2

3.5.1

Assembly of butterfly valve BR 14b (Type WTD and MTD)

3-2

3.5.2

Assembly of butterfly valve BR 14b (Type WNS)

3-4

3.5.3

Assembly of butterfly valves BR 14c (BR 74b) (Type WTD and MTD)

3-6

3.5.4

Note for installation of actuator elements

3-8

4

Shipment and on-site transport

4-1

4.1

Accepting delivery

4-1

4.2

Unpacking the butterfly valve

4-1

4.3

Transporting and lifting the butterfly valve

4-1

4.3.1

Transporting

4-1

4.3.2

Lifting

4-1

4.3.3

Lifting points on the body

4-2

4.3.4

Lifting points on the bracket

4-3

4.4
5

Storing the butterfly valve
Installation

4-3
5-1

5.1

Installation conditions

5-1

5.2

Preparing for assembly

5-1

5.3

Assembling the butterfly valve and actuator

5-1

5.4

Installing the butterfly valve in the pipe

5-2

5.4.1

General

5-2

5.4.2

Installing the butterfly valve

5-3

5.5

Checking the assembled butterfly valve

5-3

5.5.1

Functional test

5-3

5.5.2

Pressure test of the pipe section

5-4

5.5.3

Rotary movement

5-4

5.5.4

Fail-safe position

5-4

EB 14b_EN
January 2024 edition
Subject to technical changes

Content

6

Start-up

6-1

7

Operation

7-1

8

Malfunction

8-1

8.1

Detecting and rectifying errors

8-1

8.2

Carrying out emergency measures

8-2

9Servicing

9-1

9.1

Periodic tests

9-1

9.2

Maintenance work

9-2

9.2.1
9.3

Replacing the seat ring
Ordering spare parts and consumables

9-2
9-2

10 Decommissioning

10-1

11 Removal

11-1

11.1

Removing the butterfly valve from the pipe

11-1

11.2

Disassembling the actuator

11-1

12 Repairs

12-1

12.1

12-1

Replacing the packing

12.1.1

Replacing the V-ring packing with butterfly valve BR 14b (Type WTD and MTD)

12-1

12.1.2

Replacing the meshwork packing with butterfly valve BR 14b (Type WNS)

12-1

12.1.3Replacing the V-ring packing with butterfly valve BR 14c (BR 74b) (Type WTD and MTD)

12-1

12.2

Replacing the seat ring

12-1

12.2.1

Replacing the seal ring in butterfly valves up to DN 300 (NPS12)12-1

12.2.2

Replacing the seat ring in butterfly valves from DN 400 (NPS16)

12-3

12.3

Additional repairs

12-3

12.4

Sending devices to PFEIFFER

12-3

13 Disposal

13-1

14 Certificates

14-1

15 Annex

15-1

15.1

15-1

Tightening torques, lubricant and tools

15.1.1

Tightening torques

15-1

15.1.2

Lubricant15-2

15.1.3

Tools

15-2

15.2

Spare parts

15-2

15.2.1

Spare parts for butterfly valve BR 14b (Type WTD and MTD)

15-3

15.2.2

Spare parts for butterfly valve BR 14b (Type WNS)

15-4

15.2.3

Spare parts for butterfly valve BR 14c (Type WTD and MTD)

15-5

15.3

Service15-6

EB 14b_EN
January 2024 edition
Subject to technical changes

Safety instructions and safety measures

1

Safety instructions and safety measures

Intended use
The PFEIFFER butterfly valve BR 14b is manually operated in
combination with an actuator for the regulation of the volume
flow, pressure and temperature of fluid, gaseous or vaporous media.
− The butterfly valve and its drive are designed for precisely
defined conditions (e.g. operating pressure, utilised medium,
temperature).
Therefore the operator must make sure that the butterfly valve
is only used when the conditions of use comply with the design criteria defined in the order.
If the operator would like to use the butterfly valve in otherapplications or environments, they must contact PFEIFFER.
− Manual butterfly valves are only intended for use, after installation in a pipe system, to cut off the media, let it flow
through or regulate it within the permitted pressure and temperature limits.
− Automated butterfly valves are only intended for use, after installation in a pipe system and after connecting the drive tothe control, to cut off the media, let it flow through or regulate
it within the permitted pressure and temperature limits.
− The data sheet contains the permissible pressure and temperature range for these butterfly valves  TB 14b.
− The safety regulations that apply to the pipe system in which
the valves are installed and to the control system to which theactuator is connected also apply to the butterfly valves.
This manual only provides safety instructions that are to beobserved additionally for butterfly valves.
There may be additional safety instructions in the manuals forthe actuator assemblies.
− It is assumed that this chapter is observed when using thevalve as intended.
Reasonably foreseeable erroneous use and unintended use
The butterfly valve is not suited for the following areas of use:
− Use outside of the technical data and the limits defined by thedesign.
− Use outside of the limited defined by the peripheral devices
installed on the butterfly valve.
Furthermore, the following activities are considered unintendeduse:− Use of third-party spare parts.
− Performance of maintenance and repair work that is not described.
Qualification of operating personnel
The butterfly valve may only be disassembled, dismantled, assembled and commissioned by qualified specialist personnel
trained in pressurised pipes who are familiar with the assembly,
commissioning and operation of this product.

EB 14b_EN
January 2024 edition
Subject to technical changes− Specialist personnel in terms of this installation and operating
manual are persons who, on the basis of their vocational education, knowledge and experience and knowledge of therelevant standards, are capable of evaluating the assigned
tasks and identifying possible hazards.
Personal protective equipment
Depending on the utilized medium, PFEIFFER recommends thefollowing protective equipment:− Protective garments, protective gloves and eye protection
when using hot, cold, aggressive and/or corrosive media.
− Hearing protection when working near the butterfly valves.
− Request additional protective equipment from the plant operator.
Prohibition of modifications
Changes to the product are not permitted without consulting
PFEIFFER. Non-compliance invalidates the product guarantee.
PFEIFFER shall not be held liable for any resulting property damage or personal injury.
Protective devices
In the case of a power supply failure, the butterfly valve automatically switches to a certain fail-safe position, see Fail-safe positions”in Chapter “3 Design and principle of operation”.
− The fail-safe position corresponds to the effective direction
and is indicated on the type plate of the rotary actuators, see
the actuator documentation.
− The valve is to be included in the equipotential bonding of theplant.
Warning of residual risks
To prevent personal injury or property damage, the operator andoperating personnel must use suitable measures to prevent thehazards that can result from the flow medium and operatingpressure as well as the signal pressure and moving parts of thebutterfly valve.
− Therefore, the operator and operating personnel must observe all the hazard information, warning information andinformation in this installation and operating manual.
Obligation of the operator to exercise diligence
The operator is responsible for proper operation as well as compliance with the safety regulations.
− The operator is responsible for providing operating personnel
with this installation and operating manual as well as the applicable documents and to provide instructions on proper operation.
− Furthermore, the operator must ensure that operating personnel and third parties are not endangered.
It is not the responsibility of PFEIFFER and therefore when using
the butterfly value ensure that:

1-1

Safety instructions and safety measures− The butterfly valve is only used as intended as described inthis chapter.
− An actuator unit that is subsequently installed on the butterfly
valve is adapted to the butterfly valve and the max. torque isobserved, and is correctly adjusted in the end positions, andin particular in the closed position of the valve.
− The pipe system and control system are properly installed
and regularly checked. The wall thickness of the butterfly
valve body is measured such that an additional load of theusual magnitude is taken into account for a pipe system installed properly in this way.
− The valve is connected properly to these systems.
− The customary flow rates in continuous operation are not exceeded in this pipe system. It is recommended to contact
Pfeiffer in the case of abnormal operating conditions, such as
vibrations, hydraulic shock, cavitation and also small
amounts of solid matter in the medium, especially abrasive
matter.
− Coordinate operating parameters near the cavitation limits
and/or with noise emission clearly above 85 dB withPFEIFFER.

1.1 Notes regarding possible severe personnel injury
DANGER
Hazards and ineffectiveness of the warranty!
In the case of non-compliance with the following hazard andwarning information, hazards may arise and the warranty provided by PFEIFFER may become invalid.
Ö Observe the following hazards and warning information.
Ö Contact PFEIFFER in the case of questions:Hazards and damage due to unsuitable butterfly valves!
Butterfly valves whose permissible pressure/temperature range(=”rating”) is not sufficient for the operating conditions can posea danger to the user and cause damage to the pipe system.
Ö Only operate butterfly valves with a permissible pressure/temperature range (=”rating”) sufficient for the operating
conditions, see the data sheet  TB 14b

Applicable standards and directives

Risk of bursting of the pressure equipment!
Butterfly valves and pipes are pressure equipment. Improper
opening can cause the bursting of butterfly valve components.
Ö Observe the maximum permissible pressure the butterfly
valve and plant.
Ö Before working on the butterfly valve, depressurise the concerned plant parts and the butterfly valve.
Ö Before removing the butterfly valve from the pipe or loosening the screw connection on the bonnet, completely release
the pressure in the pipe so that the medium does not escapeuncontrolled from the line.
Ö Empty the medium from the concerned plant parts and butterfly valve. (Wear protective equipment).

− The butterfly valves fulfil the requirements of the European
Pressure Equipment Directive 2014/68/EU and the European
Machinery Directive 2006/42/EC.

Danger due to incorrect loosening of an optional adjustablestuffing box!
The control shaft is sealed by a stuffing box.

In the case of butterfly valves provided with a CE marking,the Declaration of Conformity provides information about theconformity assessment procedure that was used.

Ö Before the nuts on the compression spacer are loosened orreleased, fully release the pressure in the pipe so no medium
escapes from the stuffing box.

Obligation of operating personnel to exercise diligence
Operating personnel must be familiar with this installation andoperating manual and the applicable documents and comply
with the indicated hazard information, warning information andother information. Furthermore, operating personnel must be familiar with the applicable regulations concerning occupationalsafety and accident prevention and observe them.

The corresponding declarations of conformity are available
in the Annex of this EB, see chapter “14 Certificates“.
− According to an ignition hazard assessment according to
DIN EN ISO 80079-36, PFEIFFER butterfly valves do nothave any own potential ignition sources and therefore are notsubject to Directive 2014/34/EU.
− CE marking based on this standard is not permitted. The inclusion of valves in the equipotential bonding of a plant applies independently of the directive for all metal parts in potentially explosive areas.

1-2

1.2 Notes regarding possible personnel injury
WARNING
Danger of burning due to hot or cold components and pipes!
Depending on the utilised medium, butterfly valve components
and pipes can become very hot or very cold and cause burns
upon contact.
Ö Butterfly valves must be protected against contact in the caseof operating temperatures >+50 °C or <-20 °C together withthe pipe connections.

EB 14b_EN
January 2024 edition
Subject to technical changes

Safety instructions and safety measures

WARNING
Danger of injury due to pressurised components and escaping
medium!
Ö Do not loosen the screw of an optional test connection while
the butterfly valve is pressurised.
Danger of crushing due to moving parts!
The butterfly valve contains moving parts (actuator stem andcontrol shaft) that can lead to crushing if reaching into it.
Ö Do not reach into the yoke during operation.
Ö When working on the butterfly valve, interrupt and lockpneumatic energy and the control signal.
Danger of injury during the switching operation if performing
test runs on butterfly valves not installed in the pipe!
Ö Do not reach into the butterfly valve. This can result in serious
injuries.
Danger of injury due to venting the actuator!
During operation, when regulating or opening and closing thebutterfly valve, the actuator can be ventilated.
Ö Install the butterfly valve such that the actuator does not ventilate at eye level.
Ö Use suitable silencers and plugs.
Ö Wear eye protection and, if necessary, hearing protection
when working near valves.

WARNING
Hazards due to incorrect butterfly valve use!
The incorrect use of the butterfly valve can represent a hazard forthe user and cause damage to the pipe system that are then nolonger the responsibility of PFEIFFER.
Ö The material selected for the parts of the butterfly valve thatcome into contact with the media must be suitable for the utilised media, pressures and temperatures.
Dangers due to use of the butterfly valve as an end fitting!
During normal operation, in particular with gaseous, hot and/or
hazardous media, spraying medium can cause hazards.
Ö A blind flange must be assembled on the free connecting
pieces or the butterfly valve must be secured against unauthorised actuation.
Ö If a butterfly valve is used as an end fitting in a pressurised
line is opened, this may only be done with extreme caution
so that the escaping medium does not cause any damage.
Danger due to incorrect installation in case of use as an end
fitting!
The seal is no longer guaranteed if the installation location isincorrect.
Ö Assemble the butterfly valve such that the fastening ring
fastened on the valve body with cylinder screws or a tension
spring is pressed against the pipe flange.

Danger of injury due to preloaded springs!
Butterfly valves that are equipped with preloaded actuator
springs are under mechanical tension.
Ö Before working on the actuator, release the compression fromthe preloaded springs, see the corresponding actuator documentation.
Danger of injury due to residual medium in the butterfly valve!
When a butterfly valve must be removed from a pipe, medium
can escape from the pipe or the butterfly valve.
Ö In the case of media that is harmful to health or hazardous,
the pipe must be completely emptied before a butterfly valve
can be removed.
Ö Pay attention to the afterflow of residuals or residuals that remain in dead spots.
Danger of injury due to the releasing of body screw connections!
If the body screw connections must be released, medium can escape from the butterfly valve.
Ö The screw connections on the connection of the body parts
may only be released or loosened after the butterfly valve has
been removed.
Ö During reassembly, tighten the screws according toTable 15-1 and Table 15-2 in Chapter “15.1.1 Tightening
torques“ using a torque wrench.

Fig.1-1:

Installation location as an end fitting

1.3 Notes regarding possible property
damageNOTE
Damage to the butterfly valve due to unsuitable medium properties!
The butterfly valve is designed for a medium with certain properties. Other media can damage the butterfly valve.
Ö Only use a medium that corresponds to the design criteria.

EB 14b_EN
January 2024 edition
Subject to technical changes

1-3Safety instructions and safety measures

NOTE
Damage to the butterfly valve due to contamination!
Contamination (e.g. solid particles) in the pipes can damage thebutterfly valve.
Ö The plant operator is responsible for cleaning the pipes in theplant.
Ö Rinse the pipes prior to commissioning.
Ö Observe the maximum permissible pressure the butterfly
valve and plant.

1.4 Warning notes on the device
Warning of moving parts

Damage to the butterfly valve and leakage due to excessively
high or low tightening torques!
The butterfly valve components must be tightened with specifictorques. Deviating torques can lead to butterfly valve leakage ordamage.
Ö Excessively tightened components are subject to increasedwear.
Ö Insufficiently tightened components can cause leakage.
Ö Observe the tightening torques, see Table 15-1 andTable 15-2 in Chapter “15.1.1 Tightening torques”.
Specific aspects in case of use for control purposes!
Ö In the case of use for control purposes, observe the limitations
indicated above in the data sheets.
Deviation of the breakaway and actuating forces due tonon-actuation of the butterfly valve!
Depending on the period of time of non-actuation, the breakaway and actuation forces can deviate considerably from the actuating power data in the data sheet.
It is recommended to actuate the butterfly valve at regular intervals.
Ö In consideration of the design, actuation must take place during the year.
Ö Indicate the duration of non-actuation when making an enquiry, so that this condition is taken into consideration in theactuator design.
Ö In the case of retrofitted actuators by the operator, the correct
actuator design as regards the duration of non-actuation is
no longer the responsibility of PFEIFFER.

Fig.1-2:

Warning of moving parts

There is a danger of crushing due to the rotary movements of theactuator- and switching shaft when reaching into the yoke aslong as the pneumatic power is connected to the actuator. At theoperator’s request, a warning note can be attached to the valve.

Damage to the seat ring or the sealing strip
Turning the valve disc over 0° leads to irreparable damage to theseal ring or the sealing strip.
Ö Only operate the valve disc within the range of 0°-90°
Damage to the butterfly valve due to unsuitable tools!
Unsuitable tools can damage the butterfly valve.
Ö Suitable tools are required to work on the butterfly valve, see
Chapter “15.1.3 Tools”.
Damage to the butterfly valve due to unsuitable lubricants!
Unsuitable lubricants can corrode and damage the surface.
Ö The butterfly valve material requires suitable lubricants, see
Chapter “15.1.2 Lubricants”.

1-4

EB 14b_EN
January 2024 edition
Subject to technical changes

Markings on the device

2Markings on the device

Each butterfly valve usually has the following marking.
Table|2-1: Marking on the type plate and on the body of the butterfly valve
Pos.

For

1

Manufacturer

PFEIFFER

Marking

RemarkAddress see Chapter “15.3 Service”

2

Valve typeBR (and number value)e.g. BR 14b = Series 14b, see the PFEIFFER catalogue

3

Body material

e.g. 1.4408

No. of the material standard according to DIN EN 10213-4

4

Size

DN (and number value)

Number value in [mm], e.g. DN 200 / number value in [inches], e.g. NPS8

5Maximum pressure

PN (and number value)

Number value in [bar] e.g. PN 40 / number value, e.g. cl150 at room temperature

Max. permissible operating temperature

TS (and number value)

Max. permissible operating pressure

PS (and number value)

PS are TS are related values here at the max. permissible operating temperature with themax. permissible operating overpressure, see the Pressure-Temperature Diagram on the data
sheet  TB 14b

Test pressure

PT (and number value)

The test pressure must be observed depending on the device

6

7

33

1234

/001

/001
Valve no. within the item
Item in the order

Manufacturer number
e.g. 331234/001/001
from 2018

Order
Year of manufacture (39=2019, 30=2020, 31=2021,
32=2022, 33=2023, 34=2024 etc.)
21

1234

/001

/001
Valve no. within the item

8

Manufacturer number
e.g. 211234/001/001
2009 to 2017

Item in the order
OrderYear of manufacture (29=2009, 20=2010, 21=2011,22=2012 etc.)
207

1234

/001

/001
Valve no. within the item
Item in the order

Manufacturer number
e.g. 2071234/001/001
until 2008

Order
Year of manufacture (205=2005, 206=2006, 207=2007etc.)
9Year of manufacture

e.g. 2018

Upon customer request, the year of manufacture can also be indicated on the valve

10

Seat material

e.g. PTFE/glass

Material marking

11

Shaft material

e.g. 1.4542/H1150

No. of the material standard according to DIN EN 10088-3

Test point number

e.g. TEST POINT
F123201-1

Test point numbers are specified by the customer

Conformity

CE

Conformity is certified separately by Pfeiffer

Code No.

0035“Notified body” according to EU Directive = TÜV Rheinland Service GmbH

15

Flow directionÎ

16

Direction of rotation

12
13
14

Data/Matrix code

Attention: see the note in Chapter “5.4 Installing the butterfly valve in the pipe”
Reference to the direction of rotation

Info
Markings on the body and the type plate must be permanent so that the valve remains identifiable.

EB 14b_EN
January 2024 edition
Subject to technical changes

2-1Markings on the device

2.1 Butterfly valve type plateFig.2-1:

Marking positions of the type plate on the butterfly valve BR 14b / 14c

2.2 Actuator type plate
See the corresponding actuator documentation.

2.3 Turning direction notice sign
The turning direction is indicated on the butterfly valve by a sign.

Fig.2-2:

2-2

Turning direction notice sign

EB 14b_EN
January 2024 edition
Subject to technical changes

Design and principle of operation

3

Design and principle of operation

VersionThe 14b / 14c series butterfly valves have the following properties:

When the medium flows through the butterfly valve in direction A(see Fig. 3-1), the valve disc is pressed slightly out of its seat. This
reduces the pre-load force as well as the breakaway torque.
When the medium flows in direction B, the pre-load force increases as the breakaway torque rises.

− BR 14b is a cast butterfly valve.

Fail-safe position− BR 14c (BR 74b) is a butterfly valve made of solid material.

Depending on the mounting of the pneumatic actuator, the butterfly valve has two fail-safe positions that are activated when thepressure is released as well when the supply air fails:− Butterfly valve body made of steel or non-corroding steel− Body version as a screw-in butterfly valve (lug type) or
clamping butterfly valve (wafer type).
− Valve seals
Type WTD, soft seal with disc spring preloaded V-ring packing.
Type MTD, metal seal with disc spring preloaded V-ringpacking.
Type WNS, soft seal with adjustable stuffing box.
Function and principle of operation
The BR 14b butterfly valves can be flowed through in both directions.
The position of the valve disc (3) determines the flow with the area released opposite of the seat ring (4). Butterfly valves aresealed between the valve disc (3) and the seat ring (4).
The control shaft (2) is sealed towards the outside by a packing(9). This packing is maintenance-free PTFE V-ring packing, which
is preloaded by disc springs (10) located above the packing
space.
Optionally, this packing can be PTFE meshwork packing, which
is preloaded by an adjustable stuffing box, or disc spring
preloaded graphite packing.

− Butterfly valve with fail-close actuator [FC]:
Upon air failure, the butterfly valve is closed. The butterfly
valve opens when the signal pressure increases, acting
against the force of the springs.
− Butterfly valve with fail-open actuator [FO]:Upon air failure, the butterfly valve is opened. The butterfly
valve closes when the signal pressure increases, acting
against the force of the springs.
Changing the fail-safe position
The fail-safe position of the actuator can be reversed if required,for this purpose see the installation and operating instructions forthe respective pneumatic actuator.
Operating elements and functions
The BR 14b butterfly valve can be selected in the following versions:− With lever and ratchet− With manual gear
− With diaphragm rotary actuator BR 30a− With PFEIFFER rotary actuator BR 31a− With rotary actuators from other manufacturers (for details
see the respective data sheet).

3.1 Variants− Double stuffing box− Primary sealing with o-ring− Flange with groove according to DIN EN 1092 (rows 16 and25 only)− Special material− High-temperature version (> 350°C)− Low-temperature version (-196°C)
Fig.3-1:

Direction of flow

The direction of flow and the differential pressure determine thebreakaway torque for opening the butterfly valve.
The double-eccentric bearing design of the control shaft causes
the valve disc to remain in contact with the seat during opening
and closing only over a very small angle of rotation, seeFig. 3-1. This reduces wear and increases the service life of thevalve. It also reduces the breakaway torque.

EB 14b_EN
January 2024 edition
Subject to technical changes

3.2 Additional fittings
Strainer
PFEIFFER recommends installing a strainer in front of the butterfly
valve. A strainer prevents the solid content in the medium fromdamaging the butterfly valve.

3-1

Design and principle of operation

Bypass and shut-off valve
PFEIFFER recommends installing a shut-off valve in front of thestrainer as well as behind the butterfly valve and to create a bypass. By means of the bypass, the entire plant does not have tobe decommissioned during maintenance and repair work on thebutterfly valve.
Insulation
The butterfly valves can be insulated to reduce the passage ofheat energy. Observe the notes in Chapter “ 5 Assembly”.

3.5 Butterfly valve assembly
The BR 14b / 14c butterfly valves have design differences in thevarious versions so that they cannot be documented in one construction manual.
− Chapter 3.5.1 describes the assembly of the butterfly valve
BR 14b - Type WTD and MTD.
− Chapter 3.5.2 describes the assembly of the butterfly valve
BR 14b - Type WNS.
− Chapter 3.5.3 describes the assembly of the butterfly valve
BR 14c - Type WTD and MTD.

Test connection
In the version with a double stuffing box, a test connection (e.g.
G¼“) can be used on the upper flange to check the tightness ofthe butterfly valve towards the atmosphere.
Grip protection
In the case of conditions of use that require a high level of safety(e. g. if the butterfly valve is freely accessible to untrained specialist personnel), PFEIFFER offers a safety guard to prevent therisk of crushing due to moving parts (actuator- and switching
shaft).
The risk assessment of the plant by the operator will indicate if
the installation of this protective device is required for the safe
operation of the butterfly valve in the plant.

3.3 Attachments
The following accessories are available either individually or in
combinations:− Locking device− Switching shaft extension (100 mm standard)

Preparation of the assembly
To assemble the butterfly valve, all parts must be prepared, e.g.
the parts are carefully cleaned and placed on a soft mat (rubber
mat or other). Keep in mind that plastic parts are almost always
very soft and very delicate, and in particular the sealing surfaces
may not be damaged.
NOTE
Damage due to cold welding of the screws in the body!
PFEIFFER recommends a heavy-duty grease paste (e.g. Gleitmo
805, manufacturer Fuchs) to prevent the cold-welding of thescrews in the bodies.
Ö Do not use this product for butterfly valves with use of oxygen.
Ö A suitable lubricant must be selected for grease-free butterfly
valves, especially for use with oxygen.

Info
The position and arrangement of the individual parts shown inthe drawings must be observed during assembly.

− Pneumatic or electric rotary actuator− Positioner (with the control valve option)− Limit switch− Solenoid valves

3.5.1

Assembly of butterfly valve BR|14b(Type WTD and MTD)

− Filter - reducing station− Jacket heater

3.5.1.1 Preassembly of the butterfly valves

Other additional equipment is possible according to specifications on request.

Ö Place the valve body (1) on a clean surface at working height
so that the bearing area of the shaft is easy to reach.
Ö Push the bearing bush (12a) as far as it will go into the bearing bore in the valve body.

3.4 Technical data
The type plates of the butterfly valve and actuator offer information about the valve version, see Chapter “2 Markings on the device”.
Info− Detailed information is available in the data sheet  TB 14b.
− The documentation for the special ball valves BR 14b that are
not described in this chapter can be requested from PFEIFFER.

3-2

Ö Insert the distance bush (22) into the bearing bore.
Info
Fit butterfly valves with a nominal size of DN 300 or NPS12
without a distance bush (22).

Ö Insert the valve disc (3) into the body such that the bearing
bores in the valve disc align with the bearing bore in thevalve body.

EB 14b_EN
January 2024 edition
Subject to technical changes

Design and principle of operation

Fig.3-2:

Sectional drawing of the BR 14b butterfly valve with disc spring preloaded V-ring packing

Table|3-1: Parts list for the BR 14b butterfly valve with disc spring preloaded V-ring packing
Item

Description

Item

Description

Item

1

Valve body

9

V-ring packing

18

Disc

2

Control shaft

10

Disc spring set

19

Tension spring3

Valve disc

11

Bearing bush

20

Screw

Seat ring

12

Bearing bush21

Distance bush

4

Description

Metal seat ring

13

Sealing22

Distance bush

5

Fastening ring

14

Grooved pin

23

Cover sealing

6

Stuffing box flange

15

Thrust ring

24

O-ring

7

Cover

16

Stud bolt

26

Screw

8

Disc

17

Nut

27

Primary sealing

Ö Insert the control shaft (2) through the bearing bores of thevalve body and the valve disc.

Ö Screw the stud bolts (16) into the valve body.

Ö Push the bearing bush (12b) over the control shaft as far as it
will go into the bearing bore in the valve body.

Ö Push also the cover sealing (23) onto the bonnet in the same
way as the sealing (13).

Ö Insert the Disc (18) into the provided recess in the cover (7).

Ö Afterwards the distance bush (21) is inserted.
Info
Fit butterfly valves with a nominal size of DN 100 or NPS4 without a spacer (21).

EB 14b_EN
January 2024 edition
Subject to technical changes

Info
Fit butterfly valves with a nominal size of DN 300 or NPS12
without cover sealing (23).

3-3Design and principle of operation

Ö Insert the preassembled cover (7) into the bearing bore in thevalve body (1) and adjust with the stud bolts (16).
Ö Tighten the cover (7) with the nuts (17) evenly and in a crisscross pattern.
Ö Push the disc (8) over the free shaft end into position in thevalve body.
Ö Push the PTFE V-ring packing (9) over the control shaft into
the body bore and press in with an assembly sleeve. Refer tothe sectional drawing Fig. 3-2 for the arrangement of the
V-ring packing.
Ö Push the thrust ring (15) over the control shaft and press it into position in the valve body.
Ö Insert the disc spring set (10). Refer to the sectional drawing
Fig. 3-2 for the arrangement of the disc springs.

3.5.1.3 Assembling butterfly valves from
DN|400 (NPS16)
Ö Insert the PTFE seat ring (4) or the metal seat ring including
the corresponding graphite rings (4) into the valve body.
Info
It is essential to pay attention to cleanliness during assembly.

Ö Place the fastening ring (5) on the seat ring (4) and adjust
with the screws (26).
Ö Tighten the screws evenly in a criss-cross pattern.

Ö Press the bearing bush (11) into the stuffing box flange (6).
Ö Fit the preassembled stuffing box flange (6) smoothly over the
body flange and adjust with screws (20).
Ö Tighten the screws (20) evenly in a criss-cross pattern.
Info
The permissible torque for retightening the stuffing box flange
can be found in Table 15-1 in Chapter “15.1.1 Tightening torques”.

Ö Adjust the dihedron of the control shaft parallel to the valve
disc (3) and secure it against further twisting.
Info
Press the control shaft up against the disc (18).

Ö Drill dowel holes for connecting the control shaft (2) and thevalve disc (3).
Ö Pin the valve disc and control shaft with close-tolerance
grooved pins (14).

3.5.1.2 Assembling butterfly valves up to
DN|300 (NPS12)
Ö Insert the PTFE seat ring (4) or the metal seat ring including
the corresponding graphite rings (4) into the body.
Info
It is essential to pay attention to cleanliness during assembly.

3.5.2

Assembly of butterfly valve BR|14b(Type WNS)

3.5.2.1 Preassembly of the butterfly valvesÖ Place the valve body (1) on a clean surface at working height
so that the bearing area of the control shaft is easy to reach.
Ö Push the bearing bush (12a) as far as it will go into the bearing bore in the valve body.
Ö Insert the distance bush (22) into the bearing bore.
Info
Fit butterfly valves with a nominal size of DN 300 or NPS12
without a distance bush (22).

Ö Insert the valve disc (3) into the valve body such that thebearing bores in the valve disc align with the bearing bore in
the valve body.
Ö Insert the control shaft (2) through the bearing bores of thevalve body and the valve disc.
Ö Push the bearing bush (12b) over the control shaft as far as it
will go into the bearing bore in the valve body.
Ö Insert the distance bush (21).
Info
Fit butterfly valves with a nominal size of DN 100 or NPS4 without a distance bush (21).

Ö Screw the stud bolts (16) into the valve body.
Ö Insert the o-ring (24) into the fastening ring (5).
Ö Place the preassembled fastening ring (5) on the seat ring (4)and press it in with a hydraulic press.
Ö Loosen the cover (7).
Ö Push the tension spring (19) into the slot.
Ö Fasten the cover (7) as previously described.

3-4Ö Insert the disc (18) into the provided recess in the cover (7).
Ö Push also the cover sealing (23) onto the cover in the same
way as the sealing (13).
Info
Fit butterfly valves with a nominal size of DN 300 or NPS12
without cover sealing (23).

EB 14b_EN
January 2024 edition
Subject to technical changes

Design and principle of operation

Ö Insert the preassembled cover (7) into the bearing bore in thevalve body (1) and adjust with the stud bolts (16).
Ö Tighten the cover (7) with the nuts (17) evenly and in a crisscross pattern.
Ö Push the disc (8) over the free shaft end into position in thevalve body.
Ö Push the PTFE meshwork packing (9) ring by ring over theshaft into the body bore and press in with an assembly
sleeve.
Ö Press the bearing bush (11) into the adjustable stuffing box(6).
Ö Fit the preassembled adjustable stuffing box (6) smoothly
over the shaft and adjust with screws (20) and washers (28).
Ö Tighten the screws (20) evenly in a criss-cross pattern.
Info
The required torques for tightening the adjustable stuffing box
can be found in Table 15-2. Torque wrenches must be used toensure that the torque is reached.

Fig.3-3:

Ö Adjust the dihedron of the control shaft parallel to the valve
disc and secure it against further twisting.
Info
Press the control shaft up against the disc (18).

3.5.2.2 Assembling butterfly valves up to
DN|300 (NPS12)
Ö Insert the seat ring (4) into the body.
Info
It is essential to pay attention to cleanliness during assembly.

Ö Insert the o-ring (24) into the fastening ring (5).
Ö Place the preassembled fastening ring (5) on the seat ring (4)and press it in with a press.

Sectional drawing of the BR 14b butterfly valve with adjustable stuffing box

Table|3-2: Parts list for the BR 14b butterfly valve with adjustable stuffing box
Item

Description

Item

Description

Item

Description

1

Valve body

9

Packing

19

Tension spring2

Control shaft

11

Bearing bush

20

Screw

3

Valve disc12

Bearing bush21

Distance bush4

Seat ring

13

Sealing22

Distance bush

5

Fastening ring

14

Grooved pin

23

Cover sealing

6

Adjustable stuffing box

16

Stud bolt

24

O-ring

7

Cover

17

Nut

26

Screw

8

Disc

18

Disc

28

WasherEB 14b_EN
January 2024 edition
Subject to technical changes

3-5Design and principle of operation

Ö Loosen the cover (7).

Ö Insert the disc (18) into the provided recess in the cover (7).

Ö Push the tension spring (19) into the slot.

Ö The cover sealing (23) is also pushed onto the cover in thesame way as the sealing (13).

Ö Fasten the cover as previously described.

3.5.2.3 Assembling butterfly valves from
DN|400 (NPS16)

Info
Fit butterfly valves with a nominal size of DN 300 or NPS12
without sealing (23).

Ö Insert the seat ring (4) into the body.
Info
It is essential to pay attention to cleanliness during assembly.

Ö Place the fastening ring (5) on the seat ring (4) and adjust
with the screws (26).
Ö Tighten the screws (26) evenly in a criss-cross pattern.

3.5.3

Assembly of butterfly valves BR|14c(BR|74b) (Type WTD and MTD)Ö Insert the preassembled cover into the bearing bore in thevalve body (1) and adjust with the stud bolts.
Ö Tighten the cover (7) with the nuts (17) evenly and in a crisscross pattern.
Ö Push the disc (8) over the free shaft end into position in thevalve body.
Ö Push the PTFE V-ring packing (9) over the control shaft into
the body bore and press in with an assembly sleeve. Refer tothe sectional drawing Fig. 3-4 for the arrangement of the
V-ring packing.
Ö Place the intermediate flange (25) on the valve body and adjust with screws (30).
Ö Tighten the screws (30) evenly in a criss-cross pattern.

3.5.3.1 Preassembly of the butterfly valvesÖ Place the valve body (1) on a clean surface at working height
so that the bearing area of the shaft is easy to reach.
Ö Push the bearing bush (12a) as far as it will go into the bearing bore in the valve body (1).

Ö Push the thrust ring (15) over the control valve and press it into position in the valve body.
Ö Insert the disc spring set (10). Refer to the sectional drawing
Fig. 3-4 for the arrangement of the disc springs.
Ö Press the bearing bush (11) into the stuffing box flange (6).

Ö Insert the distance bush (22) into the bearing bore.

Ö Fit the preassembled stuffing box flange smoothly over the intermediate flange and adjust with screws (20).

Info
Fit butterfly valves with a nominal size of DN 300 or NPS12
without a distance bush (22).

Ö Tighten the screws (20) evenly in a criss-cross pattern.

Ö Insert the valve disc (3) into the valve body such that thebearing bores in the valve disc align with the bearing bore in
the valve body.
Ö Insert the control shaft (2) through the bearing bores of thevalve body and the valve disc.
Ö Push the bearing bush (12b) over the control shaft as far as it
will go into the bearing bore in the valve body.
Ö Insert the distance bush (21).
Ö Drill dowel holes for connecting the control shaft (2) and thevalve disc (3).
Ö Pin the valve disc and control shaft with close-tolerance
grooved pins (14).
Info
Fit butterfly valves with a nominal size of DN 100 or NPS4 without a distance bush (21).

Info
The permissible torque for retightening the stuffing box flange
can be found in Table 15-1 in Chapter “15.1.1 Tightening torques”.

Ö Adjust the dihedron of the control shaft (2) parallel to thevalve disc and secure it against further twisting.
Info
Press the control shaft up against the disc (18).

Ö Drill dowel holes for connecting the control shaft (2) and thevalve disc.
Ö Pin the valve disc and control shaft with close-tolerance
grooved pins (14).

Ö Screw the stud bolts (16) into the valve body.

3-6

EB 14b_EN
January 2024 edition
Subject to technical changes

Design and principle of operation

Fig.3-4:

Sectional drawing of the BR 14c butterfly valve with spring washer preloaded V-ring packing

Table|3-3: Parts list for the BR 14c butterfly valve with spring washer preloaded V-ring packing
Item

Description

Item

Description

Item

1

Valve body

10

Disc spring set

20

Screw

2

Control shaft

11

Bearing bush21

Distance bush

Valve disc12

Bearing bush22

Distance bush

Metal seat ring

13

Sealing23

Bonnet sealing

3
4

Description

Seat ring

14

Grooved pin

24

O-ring5

Fastening ring

15

Thrust ring

25

Intermediate flange

6

Stuffing box flange

16

Stud bolt

26

Screw

7

Cover

17

Nut

29

O-ring

30

Screw

8

Disc

18

Disc

9

V-ring packing

19

Tension spring

3.5.3.2 Assembling butterfly valves up to
DN|300 (NPS12)
Ö Insert the PTFE seat ring (4) or the metal seat ring including
the corresponding graphite rings (4) into the body.
Info
It is essential to pay attention to cleanliness during assembly.

Ö Insert the o-ring (24) into the fastening ring (5).
Ö Place the preassembled fastening ring (5) on the seat ringand press it in with a press.

Ö Push the tension spring (19) into the slot.
Ö Fasten the cover as previously described.

3.5.3.3 Assembling butterfly valves from
DN|400 (NPS14)
Ö Insert the PTFE seat ring (4) or the metal seat ring including
the corresponding graphite rings (4) into the body.
Info
It is essential to pay attention to cleanliness during assembly.

Ö Loosen the cover (7).

EB 14b_EN
January 2024 edition
Subject to technical changes

3-7Design and principle of operation

Ö Place the fastening ring (5) on the seat ring (4) and adjust
with the screws (26).
Ö Tighten the screws (26) evenly in a criss-cross pattern.

3.5.4

Note for installation of actuator elements

NOTE
Damage to the butterfly valve due to the incorrect actuator assembly!
Double eccentric butterfly valves must always be closed clockwise!
Ö Observe the turning direction when assembling an actuator.
The turning direction is indicated on the butterfly valve by a sign.

Fig.3-5:

3-8

Turning direction notice sign

EB 14b_EN
January 2024 edition
Subject to technical changes

Shipment and on-site transport

4

Shipment and on-site transport

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
NOTE
Damage to the butterfly valve due to improper transport andstorage!
Ö Butterfly valves must be handled, transported and stored withcare.

4.1 Accepting delivery
Perform the following steps after receiving the goods:
Ö Check the scope of supply. Compare the delivered goods
with the delivery note.
Ö Check the supply for transport damage. Report transport
damage to PFEIFFER and the transport company (see the delivery note).

WARNING
Danger of injury due to the tipping of the butterfly valve!
Ö Observe the centre of gravity of the butterfly valve.
Ö Secure the butterfly valve against tipping and twisting.

NOTE
Damage to the butterfly valve due to improper fastening of thesling!
The screwed-in lifting eyes on PFEIFFER actuators are used only
for actuator assembling and disassembling as well as for lifting
the actuator without the butterfly valve. These lifting eyes are notintended for lifting the complete butterfly valve.
Ö When lifting the butterfly valve, make sure that the entire load
is carried by the sling that is fastened to the butterfly valve
body.
Ö Do not fasten the load-bearing sling to the actuator, handwheel or other components.

4.3.1
4.2 Unpacking the butterfly valve

Transporting

Carry out the following steps:

The butterfly valve can be transported using lifting equipment
such as a crane or a forklift.

Ö Unpack the butterfly valve directly before lifting for installation into the pipe.

Ö Leave the butterfly valve on the pallet or in the transport container for transport.

Ö Leave the butterfly valve on the pallet or in the transport container for on-site transport.

Ö Butterfly valves that weigh more than approx. 10 kg shouldbe transported on a pallet (or supported similarly) (also to theinstallation site). The packaging should protect the butterfly
valves from damage.

Ö The protective caps on the butterfly valve inlet and outlet prevent foreign matter from entering the butterfly valve anddamaging it. Only remove the protective caps prior to installation in the pipe.
Ö Dispose of the packaging properly.

4.3 Transporting and lifting the butterfly valve
DANGER
Danger due to falling of suspended loads!
Do not stand under suspended loads.

WARNING
Overturning of the lifting equipment and damage to the load
lifting equipment by exceeding the lifting capacity!
Ö Only used approved lifting equipment and load lifting equipment whose lifting capacity corresponds at least to the weightof the butterfly valve including the actuator.
Ö Take the weights from the respective data sheet.

Ö Comply with the transport conditions.
Transport conditions
Ö Protect the butterfly valve against external influences, such as
impacts.
Ö Do not damage the corrosion protection (paint, surface coating). Repair damage immediately.
Ö Protect the butterfly valve against moisture and dirt.

4.3.2

Lifting

When installing the butterfly valve in the pipe, larger butterfly
valves can be lifted using lifting equipment such as a crane or
forklift.
Conditions for liftingÖ Use a hook with a safety clamp as the suspension element sothat the sling cannot slip off the hook during lifting and transport, see Fig. 4-1.
Ö Secure the sling against shifting and slipping off.
Ö Fasten the sling such that it can be removed again after installation in the pipe.
Ö Avoid swinging and tipping the butterfly valve.

EB 14b_EN
January 2024 edition
Subject to technical changes

4-1

Shipment and on-site transport

Fig. 4-1:

Lifting points of the BR 14b butterfly valve

Ö In the case of interruptions in work, do not leave the lifting
equipment suspended in the air for a long period of time.
Ö Lift the butterfly valves aligned in the same direction in which
they will be installed in the pipe.
Ö Always lift the butterfly valve in the centre of gravity of theload to prevent uncontrolled tipping.
Ö Make sure that in the case of butterfly valves, any slings between the lifting eyes on the rotary actuator and suspension
element are not loaded. These slings are used only to secure
the load against turning over while lifting. Before lifting thebutterfly valve, pretension this sling so it is taut.
DANGER
Danger due to incorrect lifting and transport!
The lifting points for the lifting slings shown in the schematic
drawing serve as examples for most valve variants. On site theconditions for lifting and transporting the valve can change however.
Ö The operator makes sure that the valve is lifted and transported safely.

4.3.3

Lifting points on the bodyÖ Attach the eye bolts in the flange bores in the body. When
doing so, make sure that the carrying capacity of the utilised
eye bolts is sufficient.
Ö Connect the lifting sling with hooks to the eye bolts. Make
sure that the hook is seated properly in the eye bolts.
Ö Fasten a lifting sling to each suspension element (e.g. hook)of the crane or forklift, see Fig. 4-1. When doing so, ensure
the safety, bearing capacity and length of the lifting slings.
Ö In the case of an actuator with a lifting eye: fasten additional
lifting slings to the lifting eye on the actuator and on the suspension element.
Ö Lift the butterfly valve carefully. Check if the load lifting
equipment holds.
Ö Move the butterfly valve at a constant speed to the installationsite.
Ö Install the butterfly valve in the pipe, see chapter 5.4
Ö After installation in the pipe: check that the flanges are firmly
tightened and that the butterfly valve holds in the pipe.
Ö Remove the lifting slings.

4-2

EB 14b_EN
January 2024 edition
Subject to technical changes

Shipment and on-site transport

4.3.4

Lifting points on the bracket

Ö Fasten a lifting sling to the bracket and the suspension element (e.g. hook) of the crane or forklift, see Fig. 4-1. When
doing so, ensure the safety, bearing capacity and length ofthe lifting slings.
Ö In the case of an actuator with a lifting eye: fasten additional
lifting slings to the lifting eye on the actuator and on the suspension element.
Ö Lift the butterfly valve carefully. Check if the load lifting
equipment holds.
Ö Move the butterfly valve at a constant speed to the installation
site.

Info
− In the case of butterfly valves that are delivered without an actuator, the valve disc is not secured to prevent it from moving. It
must not opened from the closed position due to external influences (e.g. shaking).
− Only in the case of butterfly valves with a pneumatic actuator
does the valve disc protrude outside of the body on body sides
in the delivered state. The packaging on the protruding edge
should protect the valve disc from damage.

Ö Do not place any objects on the butterfly valve.

Ö Install the butterfly valve in the pipe, see chapter 5.4
Ö After installation in the pipe: check that the flanges are firmly
tightened and that the butterfly valve holds in the pipe.
Ö Remove the lifting slings.

4.4 Storing the butterfly valve
NOTE
Damage to the butterfly valve due to improper storage!
− Comply with the storage conditions.
− Avoid long storage periods.
− In the case of deviating storage conditions and a longer storage period, contact PFEIFFER.

Info
PFEIFFER recommends checking the butterfly valve and the storage conditions regularly during a longer storage period.

Ö In the case of storage prior to installation, the valve should
normally be stored in a closed room where it is protectedagainst harmful influences such as impacts, dirt or moisture.
A room temperature of 25 °C ±15 °C is recommended.
Ö In particular, the actuator and the ends of the butterfly valve
to the pipe connection may not be damaged by mechanicalor any other influences.
Ö Do not stack the butterfly valves.
Ö Prevent condensation in damp rooms. Use a desiccant orheater.
Ö The butterfly valve must be stored in its protective packaging
and/or with the protective caps on the connection ends.
Ö Butterfly valves that weigh more than approx. 10 kg should
be stored on a pallet (or supported similarly).
Ö Butterfly valves are usually delivered in a closed position.
They must be stored in the position in which they were delivered. The actuating device must not be actuated.

EB 14b_EN
January 2024 edition
Subject to technical changes

4-3Shipment and on-site transport

4-4

EB 14b_EN
January 2024 edition
Subject to technical changes

Installation

5

Installation

5.2 Preparing for assembly

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.

Butterfly valves must be handled, transported and stored withcare, see Chapter “4 Delivery and on-site transport”.

The following instructions apply additionally for butterfly valves.
Observe chapter “4.3 Transporting and lifting the butterfly valve”
for transport to the installation site.

Perform the following steps after receiving the goods:

5.1 Installation conditions

Ö Check the supply for transport damage. Report transport
damage to PFEIFFER and the transport company (see the delivery note).

Operator level
The operator level for the butterfly valve is the front view on all
operating elements of the butterfly valve including the attachments from the perspective of operating personnel.
The plant operator must make sure that operating personnel can
carry out all work after the device is installed safely and can access it easily from the operator level.
Pipe routing
The guidelines applicable on site apply for the installation of butterfly valves in the pipe.
Install the butterfly valve such that there is low vibration and no
mechanical stress. Observe the sections “Installation orientation”
and “Support and mounting” in this chapter.
Install the butterfly valve so there is enough space to replace theactuator and butterfly valve as well as to perform maintenancework.
Installation position
The preferred installation position is with the switching shaft horizontal. The actuator should not be located directly below the butterfly valve, if possible.
Ö In the case of deviations from this installation position, contact PFEIFFER.
Support and mounting
The plant manufacturer is responsible for the selection and implementation of a suitable support or mounting for the installed butterfly valve as well as the pipe.
Venting
Vents are screwed into the exhaust air connections of pneumaticand electropneumatic devices to ensure that the generated exhaust air can be released to the outside (protection against overpressure in the device). Furthermore, vents allow the intake of air(protection against underpressure in the device).
Ö Carry out venting on the side that faces away from the operator level.

Ö Check the scope of supply. Compare the delivered goods
with the delivery note.

Ensure the following conditions prior to assembly:− The butterfly valve is clean.
− The butterfly valve data on the type plate (type, nominal size,
material, nominal pressure and temperature range) matches
the plant conditions (nominal size and nominal pressure of
the pipe, medium temperature, etc.). For details about themarking, see Chapter “2 Markings on the device”.
− Desired or required additional fittings, see Chapter “3.2 Additional fittings”, are installed or prepared as far as necessary
before the assembly of the butterfly valve.

5.3 Assembling the butterfly valve and actuator
PFEIFFER butterfly valves are supplied in working order. In individual cases, the actuator and butterfly valve are delivered separately and must be assembled. The tasks are listed below that arenecessary for assembly and prior to the commissioning of thebutterfly valve.
WARNING
Danger and damage due to retrofitting an actuator unit!
The subsequent fitting of an actuator unit can pose a danger tothe user and cause damage to the pipe system.
Ö The torque, rotation direction, actuation angle and adjustment of the “OPEN” and “CLOSED” end stops must be
adapted to the butterfly valve.
Danger and damage due to use of an electrical actuator!
Ö It must be made sure that the valve in the “CLOSED” position
is turned off by the signal of the torque switch.
Ö In the “OPEN” position, the butterfly valve must be turned off
by the limit switch.
Ö If shut-off takes place in an intermediate position due to thesignal of the torque switch, this signal should be used in addition for an error message. The fault must be remedied assoon as possible see Chapter “8 Malfunction”.
Ö For further instructions, see the electrical actuator manual.

Ö When connecting the attachments, make sure that they canbe accessed from the operator level safely and easily.

EB 14b_EN
January 2024 edition
Subject to technical changes

5-1Installation

WARNING
Danger and damage due to high external loads on an actuator
unit!
Actuators are not “stepladders”.
Ö Loads may not be applied to the actuators as they can damage or destroy the butterfly valve.
Danger and damage due to heavy actuator units!
Actuators that are heavier than the weight of the butterfly valve
can pose a danger to the user and cause damage to the pipe
system.
Ö These actuators must be supported if they generate a bending stress on the butterfly valve due to their size and/or installation situation.

NOTE
Damage to the butterfly valve due to the incorrect actuator
assembly!
Double eccentric butterfly valves must always be closed clockwise!
Ö Observe the turning direction when assembling an actuator.
Ö The turning direction is indicated on the butterfly valve by asign, see Fig. 5-1.
Damage to the butterfly valve due to the incorrect setting of theend stops!
The actuating device is adjusted to the operating data specified
in the order.
Ö The adjustment of the “OPEN” and “CLOSED” end stops isthe responsibility of the user.

Ö Handle the butterfly valve with care and observe the instructions for the flange connection.
Ö Make sure that only butterfly valves are installed whose pressure classes, connection type (flow rate), type of lining andconnection dimensions match the conditions of use. See thecorresponding marking on the butterfly valve.
Ö The counterflanges must have smooth sealing surfaces. Other
flange shapes must be agreed upon with PFEIFFER.
DANGER
Danger due to exceeding the limits of use!
Exceeding the limits of use can pose a danger to the user andcause damage to the pipe system.
Ö No butterfly valve may be installed whose permissible pressure/temperature range is not sufficient for the operating
conditions.
Ö The max. permissible limits of use are marked on the butterfly
valve, see Chapter “2 Markings on the device”.
Ö The permissible range is defined in Chapter “1 Safety instructions and safety measures”.

Ö The connection ends of the pipe must align with the butterfly
valve connections and have plane-parallel ends.
Ö The connection data for the actuator unit must match the control data. See the type plate(s) on the actuator unit.
Ö Prior to installation, the butterfly valve and the connectedpipe must be carefully cleaned of any contamination, in particular solid foreign matter.
Ö The sealing surfaces on the flange connection and the utilizedflange seals must in particular be free of all contamination
during installation.
Ö An arrow is marked on the body. The direction of the arrowmust correspond to the direction of flow in the pipe.
InfoFig.|5-1:

Turning direction notice sign

5.4 Installing the butterfly valve in the pipe
5.4.1

GeneralÖ Transport the valve in its original packaging to the installationsite and unpack it only there.
Ö Inspect the butterfly valve and actuator for transport damage.
Damaged butterfly valves or actuators may not be installed.
Ö A functional test is to be carried out at the beginning of installation for manually-operated butterfly valves: the butterfly
valve must close and open correctly. Detected malfunctions
must be fixed before commissioning. See also chapter “8Malfunction”.

5-2

It may be necessary in special cases for a butterfly valve to betight against the direction of flow.
For installation in these special cases, contact PFEIFFER as this
could lead to an excessive strain on the seal ring, washer, etc.

Ö When pushing the butterfly valve and the required flange
seals into an already assembled pipe, the distance between
the pipe ends must be measured such that all contact surfacesof the butterfly valve and seals remain undamaged.
NOTE
Damage to the sealing surfaces and seals or untight flange
connection due to improper assembly!
Ö Tighten the flange connections evenly and in a criss-crosspattern with the torques indicated in Table 15-3.

EB 14b_EN
January 2024 edition
Subject to technical changes

Installation

Ö When installing peripheral devices, make sure that they canbe operated from the working area of operating personnel.

Ö After a long storage period, retighten the body screws. Also
retighten the screws of the stuffing box according toTable 15-1 or Table 15-2 in Chapter 15.1.1.1.

NOTE

Ö Vents are screwed into the exhaust air connections of pneumatic and electropneumatic devices to ensure that the generated exhaust air can be released to the outside (protection
against overpressure in the device).

Damage to the valve due to improper installation!
The valve disc could be damaged and the butterfly valve couldleak.
Ö Push the butterfly valve with a closed valve disc into the gap
between the pipe flanges.
Ö The inside diameter of the counterflange must leave enoughspace for the opened valve disc so that it is not damaged
when swinging out, see Table 5-1.

Furthermore, vents allow the intake of air (protection against
underpressure in the device).
Ö Carry out venting on the side that faces away from the working area of operating personnel.

Table|5-1: Minimum required inner diameter Di of the counterflange
DN

80

100

150

200

250

300

350

400

500

NPS

3

4

6

8

10

12

14

16

20

54

78

128

180

227

276

308

365

406

Row 20

22

50

82

122

151

217

252

308

446

Row 25

35

60

96

153

210

256

283

308

446

Row 16

-

-

118

166

217

260

301

348

454

ØDi1
BR14b
BR14c
BR74b

5.4.2

ØDi2

Installing the butterfly valve

Ö Close the butterfly valve in the pipe for the duration of the installation.
Ö Remove the protective caps on the valve openings prior to installation.
Ö Lift the butterfly valve with suitable lifting equipment at the installation site, see chapter “4.3 Transporting and lifting thebutterfly valve”. When doing so observe the flow direction of
the butterfly valve. An arrow on the butterfly valve indicatesthe flow direction.
Ö Make sure that the correct flange seals are used.
Ö Screw the pipe together with the butterfly valve without tension.
Ö After installation, open the butterfly valve slowly in the pipe.
NOTE
Damage to the butterfly valve due to a sudden pressure increase and resulting high flow speed!
Open the butterfly valve slowly in the pipe during commissioning.
=

Info

Fig.|5-2:

Inside diameterÖ Check the correct function of the butterfly valve.

5.5 Checking the assembled butterfly valve
5.5.1

Functional test

WARNING
Danger of crushing due to moving actuator- and control shaft!
Ö Do not reach into the yoke as long as the pneumatic power isconnected to the actuator.
Ö Before working on the butterfly valve, interrupt and lockpneumatic energy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects in the yoke to hinder theoperation of the actuator- and control shaft.
Ö If the actuator- and control shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see the corresponding actuator documentation.

Observe the following for butterfly valves with a metal seat:
To avoid damaging the seat seal, make sure that the pipe connected upstream and downstream of the butterfly valve is cleaned
carefully of all rigid and abrasive particles prior to installation.

EB 14b_EN
January 2024 edition
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5-3Installation

WARNING
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the butterfly valve, exhaust air can escape, for example from theactuator.
Ö Wear eye protection and, if necessary, hearing protection
when working near valves.

5.5.3

Rotary movement

The rotary movement of the actuator- and switching shaft must be
linear without any jerky movements.
Ö Open and close the butterfly valve. When doing so, observe
the movement of the actuator shaft.
Ö Set the maximum and minimum control signal in succession
to check the end positions of the butterfly valve.
Ö Check the display on the position indicator.

Ö At the end of installation, perform a functional test with thecontrol signals:
The butterfly valve must close and open correctly according to
the control commands. Detected malfunctions must be fixed
before commissioning, see Chapter “8 Malfunction”.
WARNING

5.5.4

Fail-safe position

Ö Close the signal pressure line.
Ö Check whether the butterfly valve moves to the fail-safe position, see Chapter “Fail-safe positions in Chapter “3 Design
and principle of operation”.

Danger due to improperly executed control commands!
Incorrectly executed control commands can cause serious injuries
or even death and cause damage to the pipe system.
Ö Check the actuator unit and control command, see chapter “8Malfunction”.

5.5.2

Pressure test of the pipe section

The pressure test was already performed on the butterfly valves
by PFEIFFER. Observe the following for the pressure test of a pipe
section with installed butterfly valves:Ö First carefully rinse newly installed pipe systems in order towash out all foreign matter.
Ö Ensure the following conditions for the pressure test:–

Valve open: The test pressure may not exceed the value
1.5 x PN (according to the type plate).

–

Valve closed: The test pressure may not exceed the value
1.1 x PN (according to the type plate).

If a butterfly valve leaks, observe chapter “8 Malfunction”.
Info
The plant operator is responsible for performing the pressure test.
After Sales Service at PFEIFFER can provide you with support forthe planning and implementation of a pressure test specific toyour plant.

5-4

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January 2024 edition
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Start-up

6

Start-up

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
WARNING

Commissioning/recommissioningÖ Open the butterfly valve slowly in the pipe. Opening slowly
prevents a sudden increase in pressure and a resulting highflow speed that damages the butterfly valve.
Ö Check the correct function of the butterfly valve.

Danger of burning due to hot or cold components and pipe!
Valve components and pipes can become very hot or very cold
during operation and cause burns upon contact.
Ö Let the components and pipes cool down or warm up.
Ö Wear protective garments and protective gloves.
Danger of injury due to pressurised components and escaping
medium!
Ö Do not loosen the screw of an optional test connection while
the butterfly valve is pressurised.
Danger of crushing due to moving actuator- and control shaft!
Ö Do not reach into the yoke as long as the pneumatic power isconnected to the actuator.
Ö Before working on the butterfly valve, interrupt and lockpneumatic energy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects in the yoke to hinder theoperation of the actuator- and control shaft.
Ö If the actuator- and control shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see the corresponding actuator documentation.
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the butterfly valve, exhaust air can escape, for example from theactuator.
Ö Wear eye protection and, if necessary, hearing protection
when working near valves.

Ensure the following conditions prior to commissioning/recommissioning:− The butterfly valve is installed properly in the pipe, see Chapter “5 Assembly”.
− The leak and function tests have been completed successfully,
see Chapter “5.1 Installation conditions”.
− The current conditions in the concerned plant section correspond to the design of the butterfly valve, see Intended use in
Chapter “1 Safety instructions and safety measures”.

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6-1

Start-up

6-2

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Operation

7

Operation

As soon as the commissioning/recommissioning work is complete, see Chapter “6 Commissioning”, the butterfly valve isready for operation.
WARNING
Danger of burning due to hot or cold components and pipe!
Valve components and pipes can become very hot or very cold
during operation and cause burns upon contact.
Ö Let the components and pipes cool down or warm up.
Ö Wear protective garments and protective gloves.
Danger of injury due to pressurised components and escaping
medium!
Ö Do not loosen the screw of an optional test connection while
the butterfly valve is pressurised.
Danger of crushing due to moving actuator- and control shafts!
Ö Do not reach into the yoke as long as the pneumatic power isconnected to the actuator.
Ö Before working on the butterfly valve, interrupt and lockpneumatic energy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects in the yoke to hinder theoperation of the actuator- and control shaft.
Ö If the actuator- and control shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see the corresponding actuator documentation.

− For the manual operation or manual override of the actuator(if present), normal manual forces are sufficient and the useof extensions to increase the actuation torque is not permitted.
− In the case of butterfly valves with a ratchet lever, the positionof the ratchet lever indicates the position of the butterfly
valve:–

Ratchet lever 90° transverse to the pipe: butterfly valve
closed,–Ratchet lever parallel to the pipe: butterfly valve open.

DANGER
Danger of injury due to jerky operation of the butterfly valve!
The failure to observe these warnings can cause extreme danger
for persons or for the pipe system.
Ö Do not open and close the butterfly valve suddenly to prevent
pressure surges and/or a temperature shock in the pipe system.

− If a butterfly valve leaks, observe chapter “8 Malfunction”.

Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the butterfly valve, exhaust air can escape, for example from theactuator.
Ö Wear eye protection and, if necessary, hearing protection
when working near valves.

Observe the following points during operation:− After commissioning and reaching the operating temperature, it may be necessary to retighten all flange connections
between the pipe and butterfly valve with the correspondingtightening torques, see Table 15-3 in Chapter “15.1.1.2
Flange connections”.
− It can also be necessary to retighten the screw connections on
the body parts with the corresponding tightening torques according to Table 15-1 or Table 15-2 in Chapter “15.1.1.1
Adjustable stuffing box”.
− The butterfly valve/actuator unit must be actuated with thecontrol signals.
− Butterfly valves that were delivered from the factory with anactuator are precisely adjusted. The user is responsible forany changes they make.

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7-1Operation

7-2

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Malfunction

8

Malfunction

When rectifying the faults, chapter “1 Safety instructions and safety measures” must be observed.

8.1 Detecting and rectifying errors
Type of fault

Possible cause

MeasuresLeaks in the pipe connection

The flange connection of thebutterfly valve is leaky

Tighten the flange screws:
NOTE
An excessive tightening torque when retightening the flange screws
can damage the butterfly valve and pipe!
The permissible torque for retightening the pipe flange screws is limited.
Retighten the flange connection with the respective tightening torque,see Table 15-3 in Chapter “15.1.1 Tightening torques”.
If necessary, increase the tightening torque to max. 20%.

The flange connection is still
leaky after retightening

Loosen the flange connection and remove the butterfly valve, seechapter “1 Safety instructions and safety measures“.
Check the plane parallelism of the flange connection and correct if it is
not sufficient.
Check the flange seals: if the seals are damaged, replace them.

Leakage on the coverConnection of the cover to the
Retighten the cover screws.
valve body released
Cover still untight after
retightening

Leaks in the switching shaft
sealingMedium escapes

Replace the cover sealing and/or butterfly valve, see chapter “1 Safety instructions and safety measures“.
DANGER
Danger of injury due to escaping medium!
To protect operating personnel from danger, depressurise the line on
both sides of the butterfly valve, see Chapter “1 Safety instructions
and safety measures”.

Medium escapes from the
stuffing box flange

Remove the butterfly valve, see chapter “1 Safety instructions andsafety measures”.
Disassemble the butterfly valve and replace the control shaft sealing.
Request spare parts from PFEIFFER, see Chapter “15.2 Spare parts”.
For the required repair instructions, see Chapter “12 Repairs”.

Medium escapes from the ad- Retighten both screws on the compression spacer alternately and injustable stuffing box
small amounts with a 1/4 turn each in the clockwise direction until the
leakage stops.
If the leakage is not stopped in this way, a repair is necessary.
Tip
When the nuts on the stuffing box must be loosened or screwed off(counterclockwise):Request spare parts from PFEIFFER, see Chapter “15.2 Spare parts”.
For the required repair instructions, see Chapter “12 Repairs”.

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January 2024 edition
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8-1Malfunction

Type of fault

Possible cause

Increased medium flow ratewith the butterfly valved
closedLeakage in the closed position Close the butterfly valve 100%.

MeasuresIf the butterfly valve is in the closed position, check if the actuator closes with full torque.
If the actuator closes with full torque, open/close the butterfly valve
when pressurised multiple times.
If the butterfly valve is still leaky, increase the tightening torque of theactuator in the “CLOSED” position up to maximum 1.1 x the nominal
torque.
If the butterfly valve is still leaky, it could be damaged.

The butterfly valve is damaged

Repairs are necessary.
Remove the butterfly valve, see chapter “1 Safety instructions andsafety measures”.
Request spare parts from PFEIFFER, see Chapter “15.2 Spare parts”.
For the required repair instructions, see Chapter “12 Repairs”.

Malfunction

The actuator unit or control
does not react

Check the actuator unit and control command.

The actuator and control are
OK

Remove and inspect the butterfly valve, see chapter “1 Safety instructions and safety measures”.

The butterfly valve is damaged

Repairs are necessary.
Remove the butterfly valve, see chapter “1 Safety instructions andsafety measures”.
Request spare parts from PFEIFFER, see Chapter “15.2 Spare parts”.
For the required repair instructions, see Chapter “12 Repairs”.

Problems in the actuator unit

The pneumatic actuator must
be removed

Disconnect the connection to the control pressure.
Remove the actuator from the butterfly valve, observe the “Safety instructions and safety measures”, see the included actuator unit manuals.

In case of a butterfly valve fault:
Info− In the case of faults that are not listed in the table, contact theAfter Sales Service at PFEIFFER.
− Spare parts must be ordered indicating all the data according
to the valve marking. Only original parts from PFEIFFER Chemie-Armaturenbau GmbH may be installed.
− If it is determined after removal that the butterfly valve material
lining is not sufficiently resistant for the medium, parts must be
selected made of a suitable material.

− Close the shut-off valves upstream and downstream of thebutterfly valve so that no medium flows through the butterfly
valve.
− Troubleshoot the error, see chapter “8.1 Detecting and rectifying errors”.
− Rectify the fault that can be fixed as indicated in the instructions provided in this installation and operating manual. For
faults that cannot be fixed, contact the After Sales Service at
PFEIFFER.
Recommissioning after faults
See Chapter “6 Commissioning”.

8.2 Carrying out emergency measures
In the case of a power supply failure, the butterfly valve automatically switches to the preset fail-safe position, (see “Fail-safe positions” in Chapter “3 Design and principle of operation”.
The system operator is responsible for emergency measures.

8-2

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January 2024 edition
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Servicing

9Servicing

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
The following documents may also be required for the maintenance of the butterfly valve:− Installation and operating manual for the installed actuator,
e.g.  EB 30a for diaphragm rotary actuators BR 30a,
 EB 31a for rotary actuators BR 31a or the corresponding
actuator documentation of other manufacturers.
WARNING
Danger of burning due to hot or cold components and pipe!
Valve components and pipes can become very hot or very cold
during operation and cause burns upon contact.
Ö Let the components and pipes cool down or warm up.
Ö Wear protective garments and protective gloves.
Danger of injury due to pressurised components and escaping
medium!
Ö Do not loosen the screw of an optional test connection while
the butterfly valve is pressurised.
Danger of crushing due to moving actuator- and control shaft!
Ö Do not reach into the yoke as long as the pneumatic power isconnected to the actuator.
Ö Before working on the butterfly valve, interrupt and lockpneumatic energy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects in the yoke to hinder theoperation of the actuator- and control shaft.
Ö If the actuator- and control shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see the corresponding actuator documentation.
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the butterfly valve, exhaust air can escape, for example from theactuator.
Ö Wear eye protection and, if necessary, hearing protection
when working near valves.
Danger of injury due to preloaded springs!
Actuators with preloaded actuator springs are pressurised.
Ö Release the compression from the preloaded springs before
working on the actuator, see the corresponding actuator documentation.
Danger of injury due to residual medium in the butterfly valve!
When working on the butterfly valve, residual medium can escape and, depending on the medium properties, cause injuries(e.g. scalding, chemical burns).
Ö Wear protective garments, protective gloves and eye protection.

EB 14b_EN
January 2024 edition
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NOTE
Damage to the butterfly valve due to excessively high or low
tightening torques!
The butterfly valve components must be tightened with specifictorques. Excessively tightened components are subject to increased wear. Insufficiently tightened components can cause
leakage.
Ö Observe the tightening torques, see Table 15.1 or Table 15-2
in Chapter “15.1.1 Tightening torques”.
Damage to the butterfly valve due to unsuitable tools!
Ö Only use tools approved by PFEIFFER, see Chapter “15.1.3
Tools”.
Damage to the butterfly valve due to unsuitable lubricants!
Ö Only use lubricants approved by PFEIFFER, see Chapter“15.1.2 Lubricants”.

Info
The butterfly valve was checked by PFEIFFER prior to delivery.
− Certain test results certified by PFEIFFER are no longer valid
when disassembling the butterfly valve. This includes the test forseat leakage and the leak test (outer tightness).
− If maintenance and repair work is performed without approval
from the After Sales Service of PFEIFFER, the product guarantee
will be voided.
− Only use original parts from PFEIFFER as spare parts that correspond to the original specification.
− Wear parts are not covered by the warranty.

9.1 Periodic tests
Ö Depending on the conditions of use, the butterfly valve must
be checked at defined intervals in order to take remedial
measures prior to possible malfunctions. The plant operator is
responsible for preparing a suitable test plan.
Ö PFEIFFER recommends the following inspections that can be
carried out during operation:

Test
If present, check the optional
test connection for tightness.
WARNING! Danger of injury due to pressurised components and escaping medium! Do not loosen the test
connection while the butterfly valve is pressurised.

Measures in the case of a negative test
resultDecommission the butterfly valve, seechapter “10 Decommissioning”.
Contact the After Sales Service at
PFEIFFER for repairs, See chapter “12Repairs“.

9-1Servicing

Test

Measures in the case of a negative test
resultCheck the rotary movementof the actuator- and control
shaft for smooth movement.

Tighten the packing correctly.

If possible, check the failsafe position of the butterfly
valve by briefly interrupting
the power supply.

Decommission the butterfly valve, seechapter “10 Decommissioning”. Then determine the cause and remedy it, see
Chapter “8 Malfunctions“.

If the actuator- and control shaft areblocked, remove the blockage.
WARNING! If the actuator- and control
shaft are blocked (e.g. due to “seizure” if
not actuated for a long period of time)they can release unexpectedly and move
uncontrolled. This can lead to crushing if
reaching into them.
Before trying to release a blockage ofthe actuator- and control shaft, interrupt
and lock the pneumatic energy and thecontrol signal. Release the residual energy of the actuator (spring tension orcompressed air reservoir) before releasing the blockage, see the corresponding
actuator documentation.

9.2 Maintenance workÖ The butterfly valve must be prepared before all maintenancework, see Chapter “12 Repairs”.
Ö After all maintenance work, the butterfly valve must be
checked prior to recommissioning, see Chapter “5.5 Checking the mounted butterfly valve”.

9.2.1

Replacing the seat ring

Ö Check the condition of the seat ring.
Ö Remove the seat ring (4) as described in Chapter “12.2 Replacing the seat ring”. Check the seat ring as well as all plastic parts for damage and if in doubt replace them.

9.3 Ordering spare parts and consumables
Information about spare parts, lubricants and tools can be received from the After Sales Service at PFEIFFER.
Spare parts
Information on spare parts can be found in Chapter “15.2 Spareparts“.

9-2

EB 14b_EN
January 2024 edition
Subject to technical changes

Decommissioning

10 Decommissioning
The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
WARNING
Danger of burning due to hot or cold components and pipe!
Valve components and pipes can become very hot or very cold
during operation and cause burns upon contact.
Ö Let the components and pipes cool down or warm up.
Ö Wear protective garments and protective gloves.

To decommission the butterfly valve for maintenance and repair
work or for disassembly, perform the following steps:
Ö Close the valves upstream and downstream of the butterfly
valve so that no medium flows through the butterfly valve.
Ö Empty the pipe and butterfly valve completely.
Ö Shut off the pneumatic power and lock it, to depressurise thebutterfly valve.
Ö Let the pipe and butterfly valve components cool down or
warm up.

Danger of injury due to pressurised components and escaping
medium!
Ö Do not loosen the screw of an optional test connection while
the butterfly valve is pressurised.
Danger of crushing due to moving actuator- and control shaft!
Ö Do not reach into the yoke as long as the pneumatic power isconnected to the actuator.
Ö Before working on the butterfly valve, interrupt and lockpneumatic energy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects in the yoke to hinder theoperation of the actuator- and control shaft.
Ö If the actuator- and control shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see the corresponding actuator documentation.
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the butterfly valve, exhaust air can escape, for example from theactuator.
Ö Wear eye protection and, if necessary, hearing protection
when working near valves.
Danger of injury due to residual medium in the butterfly valve!
When working on the butterfly valve, residual medium can escape and, depending on the medium properties, cause injuries(e.g. scalding, chemical burns).
Ö Wear protective garments, protective gloves and eye protection.
Ö Do not loosen the screw of an optional test connection while
the butterfly valve is pressurised.

EB 14b_EN
January 2024 edition
Subject to technical changes

10-1Decommissioning

10-2

EB 14b_EN
January 2024 edition
Subject to technical changes

Removal

11 Removal
The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
WARNING
Danger of burning due to hot or cold components and pipe!
Valve components and pipes can become very hot or very cold
during operation and cause burns upon contact.
Ö Let the components and pipes cool down or warm up.
Ö Wear protective garments and protective gloves.
Danger of crushing due to moving actuator- and control shaft!
Ö Do not reach into the yoke as long as the pneumatic power isconnected to the actuator.
Ö Before working on the butterfly valve, interrupt and lockpneumatic energy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects in the yoke to hinder theoperation of the actuator- and control shaft.
Ö If the actuator- and control shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see the corresponding actuator documentation.
Danger of injury due to residual medium in the butterfly valve!
When working on the butterfly valve, residual medium can escape and, depending on the medium properties, cause injuries(e.g. scalding, chemical burns).
Ö Wear protective garments, protective gloves and eye protection.
Ö Do not loosen the screw of an optional test connection while
the butterfly valve is pressurised.

11.1 Removing the butterfly valve from thepipeÖ Loosen the flange connection.
Ö Remove the butterfly valve from the pipe, see Chapter “4.3Transporting and lifting the butterfly valve”.
WARNING
If a used valve is sent to PFEIFFER for service:
The valves must be decontaminated properly in advance.

Ö When returning a used valve, include the safety data sheet
for the medium as well as confirmation of decontamination of
the valve. Otherwise the valve will not be accepted.
Tip− PFEIFFER recommends documenting the following contamination data in the form  FM 8.7-6 “Declaration regarding thecontamination of PFEIFFER valves and components”.
− This form is available at  www.pfeiffer-armaturen.com.

11.2 Disassembling the actuator
See the corresponding actuator documentation.

Danger of injury due to preloaded springs!
Ö Actuators with preloaded actuator springs are pressurised.
Ö Before working on the actuator, release the compression fromthe preloaded springs.

Prior to disassembly, make sure that the following conditions aremet:− The butterfly valve is decommissioned, see chapter “10 Decommissioning”.

EB 14b_EN
January 2024 edition
Subject to technical changes

11-1Removal

11-2

EB 14b_EN
January 2024 edition
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Repairs

12 Repairs
If the operation of the butterfly valve is no longer compliant or if
it does not work at all, it is defective and must be repaired or replaced.
NOTE
Damage to the butterfly valve due to improper maintenanceand repair!
Ö Do not perform maintenance and repair work on your own.
Ö Contact the After Sales Service at PFEIFFER for maintenanceand repair work.

In special cases, certain maintenance and repair work may be
performed.
The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
The following instructions apply additionally for butterfly valves.
For decommissioning and disassembly, observe Chapter “10 Decommissioning” and “11 Disassembly”.

12.1.2 Replacing the meshwork packing withbutterfly valve BR|14b (Type|WNS)Ö Place the butterfly valve on an even and clean work surface
so that the packing space is easy to reach.
Ö Loosen the screws (20) and remove the stuffing box (6) carefully.
Ö Remove the meshwork packing (9).
Ö Check the rings of the meshwork packing as well as all plastic and graphite parts for damage and, in the case of doubt,
replace them.
Ö Assemble the butterfly valve as described in Chapter “3.5.2
Assembly of butterfly valve BR 14b (Type WNS)”.

12.1.3 Replacing the V-ring packing with butterfly valve BR|14c (BR|74b) (Type|WTD
and MTD)
Ö Place the butterfly valve on an even and clean work surface
so that the packing space is easy to reach.
Ö Loosen the screws (20) and remove the stuffing box flange (6)carefully.

12.1 Replacing the packing
If a leak is found in the stuffing box (6), the PTFE rings of the
V-ring packing (9) or the rings of the meshwork packing (9)could be defective.
Ö Check the condition of the packing.
Disassemble the butterfly valve to remove the packing. For thispurpose, observe Chapter “1 Safety instructions and safetymeasures”.

Ö Remove the disc springs from the disc spring set (10).
Ö Remove the thrust ring (15).
Ö Remove the V-ring packing (9).
Ö Check the PTFE rings of the V-ring packing as well as allplastic and graphite parts for damage and, in the case of
doubt, replace them.
Ö Assemble the butterfly valve as described in Chapter “3.5.3
Assembly of butterfly valves BR 14c (BR 74b) (Type WTD andMTD)”.

12.1.1 Replacing the V-ring packing with butterfly valve BR|14b (Type|WTD and
MTD)

12.2 Replacing the seat ring

Ö Place the butterfly valve on an even and clean work surface
so that the packing space is easy to reach.

If a leak is found in the passage of the butterfly valve, the seatring (4) could be defective.

Ö Loosen the screws (20) and remove the stuffing box flange (6)carefully.

Ö Check the condition of the seat ring.

Ö Remove the disc springs from the disc spring set (10).
Ö Remove the thrust ring (15).

Disassemble the butterfly valve to remove the seat ring. For thispurpose, observe Chapter “1 Safety instructions and safetymeasures”.

Ö Remove the V-ring packing (9).
Ö Check the PTFE rings of the V-ring packing as well as allplastic and graphite parts for damage and, in the case of
doubt, replace them.

12.2.1 Replacing the seal ring in butterfly
valves up to DN|300 (NPS12)

Ö Assemble the butterfly valve as described in Chapter “3.5.1
Assembly of butterfly valve BR 14b (Type WTD and MTD).

Ö Place the butterfly valve on an even and clean work surface
so that the seal ring is easy to reach.

EB 14b_EN
January 2024 edition
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12-1Repairs

Fig.|12-1: Sectional drawing of a butterfly valve BR 14b

Table 12-1: Parts list of the BR 14b butterfly valve
Item

Description

Item

Description

Item

Description

1

Valve body

11

Bearing bush21

Distance bush2

Control shaft

12

Bearing bush22

Distance bush3

Valve disc

13

Sealing

23

Cover sealing

4

Seat ring

14

Grooved pin

24

O-ring5

Fastening ring

15

Thrust ring

25

Intermediate flange

6

Stuffing box

16

Stud bolt

26

Screw

7

Cover

17

Nut

27

Primary sealing

8

Disc

18

Disc

28

Washer9

Packing

19

Tension spring

29

O-ring10Disc spring set

20

Screw

30

Screw

12-2

EB 14b_EN
January 2024 edition
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Repairs

Ö Loosen the nuts (17) and remove the cover (7).
Ö Remove the tension spring (19).
Ö Disassemble the fastening ring (5).
Ö Remove the PTFE seat ring (4) or the metal seat ring including
the corresponding graphite rings (4).
Ö Check the seat ring as well as all plastic and graphite partsfor damage and, in the case of doubt, replace them.
Info
It is essential to pay attention to cleanliness during assembly.

Ö Assemble the valve as described in Chapter “3.5 Butterfly
valve assembly”.

12.2.2 Replacing the seat ring in butterfly
valves from DN|400 (NPS16)
Ö Place the butterfly valve on an even and clean work surface
so that the seat ring is easy to reach.

12.4 Sending devices to PFEIFFER
Defective butterfly valves can be sent to PFEIFFER for repair.
Proceed as follows to send devices:
WARNING
Danger due to contaminated valves!
Ö When returning a used valve to PFEIFFER for service, decontaminate the valve properly in advance.
Ö When returning a used valve, include the safety data sheet
for the medium as well as confirmation of decontamination of
the valve. Otherwise the valve will not be accepted.

Tip− PFEIFFER recommends documenting the following contamination data in the form  FM 8.7-6 “Declaration regarding thecontamination of PFEIFFER valves and components”.
− This form is available at  www.pfeiffer-armaturen.com.

Ö Include the following information for returns:

Ö Loosen the screws (26) and disassemble the fastening ring(5).

− Manufacturer numberÖ Remove the PTFE seat ring (4) or the metal seat ring including
the corresponding graphite rings (4).

− Article number

Ö Check the seat ring as well as all plastic and graphite partsfor damage and, in the case of doubt, replace them.

− Butterfly valve type
− Nominal size and version of the butterfly valve− Manual valve/automated valve− Medium (designation and consistency)Info
It is essential to pay attention to cleanliness during assembly.

− Medium pressure and temperature− Flow rate in m³/h
− Bench range of the actuatorÖ Assemble the valve as described in Chapter “3.5 Butterfly
valve assembly”.

− Number of actuations (year, month, week or day)− Installation drawing if available− Completed declaration regarding contamination. This
form is available at  www.pfeiffer-armaturen.com.

12.3 Additional repairs
Ö In the case of additional major damage, it is recommended
to have repairs performed by PFEIFFER.

EB 14b_EN
January 2024 edition
Subject to technical changes

12-3Repairs

12-4

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January 2024 edition
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Disposal

13 Disposal
Ö For disposal, observe the local, national and international
regulations.
Ö Do not dispose of old components, lubricant and hazardous
materials with domestic waste.

EB 14b_EN
January 2024 edition
Subject to technical changes

13-1Disposal

13-2

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January 2024 edition
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Certificates

14 Certificates
The declaration of conformity is available on the following
pages:− Declaration of conformity according to Pressure Equipment
Directive 2014/68/EU for automated valves, see page 14-2.
− Declaration of conformity according to Pressure Equipment
Directive 2014/68/EU for manually operated valves, seepage 14-3.
− Declaration of conformity for completed machinery according
to Machinery Directive 2006/42/EC for butterfly valve
BR 14b, see page 14-4.
− Declaration of installation for partly completed machinery
according to Machinery Directive 2006/42/EC for butterfly
valve BR 14b, see page 14-5
The printed certificates correspond to the status at the time ofprinting. Further optional certificates are available upon request.

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January 2024 edition
Subject to technical changes

14-1

Certificates14-2

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January 2024 edition
Subject to technical changes

Certificates

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January 2024 edition
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14-3Certificates14-4

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January 2024 edition
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Certificates

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January 2024 edition
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14-5

Certificates14-6

EB 14b_EN
January 2024 edition
Subject to technical changes

Annex15 Annex

15.1.1.3 Flange connections

15.1 Tightening torques, lubricant and tools

Info
Required tightening torques for assembly for flanges according to
DIN EN 1092-1 type 11 and connecting elements (e.g. screws,
threaded pins) made of 25CrMo4 / A2-70 or a comparable
strength.
The values are taken from the “Guidelines for assembly of flange
connections in processing plants” of the VCI (Verband derChemischen Industrie e.V.).

15.1.1 Tightening torques
Info
The tightening torques stated in the tables can only be understood as very rough and non-binding guide values and refer to acoefficient of friction of 0.2μ. Lubricating the threads leads to indeterminate tightening conditions.
1)

Table|15-3: Required tightening torques

15.1.1.1 Stuffing box flange

DN

PN

For the assembly of the stuffing box flange, the screw connections
are tightened in a criss-cross pattern with the tightening torques
indicated below.

50

10 ... 40

80

10 ... 40

100

Table|15-1: Stuffing box flange tightening torques
Nominal size
DN

NPS

50

2

Qty.

Thread (20)Tightening torque

1) 2)

150

200

ThreadM16

Tightening torques[Nm] for sealing units 3)
AB

125 4)

80
I

10 ... 16
25 ... 40
10 ... 16

M20

240 5)

150

25 ... 40

M24

340

200

II

10 ... 16

M20

240 5)

150

I

80

3

25

M24

340

200

100

4

40

M27

500

250

150

6

10

M20

240 5)

150

200

8

250

16

M24

340

200

M27

500

250

250

10

25 ... 40

300

12

10

M20

240 5)

150

350

14

16

M24

340

200

400

16

25

M27

500

250

500

20

300

300

40

M30

700

10

M20

240 5)

150

16

M24

340

200

25

M30

700

300

40

M33

900

500

10

M24

340

200

16

M27

500

250

25

M33

900

500

40

M36

1200

750

10

M24

340

200

16

M30

700

300

25

M33

900

500

40

M39

1400

900

10

M27

500

250

16

M33

900

500

25

M36

1200

750

Table|15-2: Tightening values for the adjustable compression
spacer

40

M45

2000

1200

10

M27

500

250

DN [mm]

16

M33

900

500

25

M39

1400

900

40

M45

2000

1200

600

24

700

28

800

32

350

Tighten the stuffing box flange screws until the bushing lies on
the dome.

2)400

15.1.1.2 Adjustable stuffing box
Info
The required torques for tightening the adjustable compression
spacers can be found in Table 15-2. Torque wrenches must be
used to ensure that the torque is reached.

500

600

MA [Nm]

80
4

100
5

EB 14b_EN
January 2024 edition
Subject to technical changes

150
6

200
7

250
7

300
9

700

Tightening
method 6)

II
I
II
I
II
I

II

15-1

Annex

DN

PN

800

ThreadTightening torques[Nm] for sealing units 3)
A

B

10

M30

700

300

16

M36

1200

750

25

M45

2000

1200

40

M52

3000

-

Tightening
method 6)

II

These tightening torques were calculated by the company BASF SE
and confirmed by partner companies.
4)
Recommended lever length 300 mm.
5)Recommended lever length 550 mm.
6)I) With manually-operated spanner with a suitable extension if
necessary.
II) With a torque wrench or other torque-controlled procedure.
3)

15.2 Spare parts
PFEIFFER recommends spare part sets for “Commissioning” andfor “2-year operation”, see:
− Chapter “15.2.1 Spare parts for butterfly valve BR 14b(type WTD and MTD)”, “15.3.2 Spare parts for butterfly
valve BR 14b (type WNS)” and “15.3.3 Spare parts for butterfly valve BR 14c (type WTD and MTD)”.

Table|15-4: Sealing unit A
Seal
Flat seal

Nominal pressure

Description

PN 10 to PN 25

Without inner eyelet

PN 40

With inner eyelet

Shaft ring seals PN 40 are covered by this.
Flat seals with inner eyelet for PN 10 - 25 are already covered, providing that the required characteristic values are complied with.

Table|15-5: Sealing unit B
Seal

Nominal pressureWith fibre gaskets andmetal-reinforcedgraphite gaskets

Seal for tongue andgroove flanges
PN 10 to PN 40

Grooved gasket

Description

Spiral gasket withgraphite-

15.1.2 Lubricant
Table|15-6: Recommended lubricant
Use

Temperature range

LubricantScrews and nuts

-10 ... +200°C

Heavy-duty grease paste (e.g.
Gleitmo 805, manufacturer
Fuchs)
Not suitable for grease-freebutterfly valves or for use withoxygen15.1.3 Tools
Recommended tools
Suitable tools are required to work on the butterfly valve. Unsuitable tools can damage the butterfly valve.

15-2

EB 14b_EN
January 2024 edition
Subject to technical changes

Annex15.2.1 Spare parts for butterfly valve BR|14b (Type|WTD and MTD)

Fig.|15-1: Exploded drawing of the BR 14b butterfly valve with spring washer preloaded V-ring packing

Table|15-7: Recommended spare parts for the butterfly valve BR 14b (Type WTD and MTD)
Item

Description

1

Material

Spare part kit

DIN

ANSI

Valve body1.4408 / 1.0619

A351 CF8M / A216 WCB

2Control shaft

1.4462 / 1.4542 / H1150

A182 F51 / AISI 630 / H1150D•

3

Valve disc1.4408 A351 CF8M

A351 CF8M•

4

Seat ring

PTFE Disc spring preloaded

Metal seat ring

NickelCommissioning•

2 year operation•

5

Fastening ring

1.4571

A479 F316Ti

6

Stuffing box flange

1.4571

A479 F316Ti

7

Cover

8

Disc

1.4571

9

V-ring packing

1.4305 / PTFE

•

•

10

Disc spring set

1.8159 / Delta Tone

•

•

11

Bearing bush

PTFE with carbon

•

•

12

Bearing bush

PTFE/glass or metal

•

•

13

Sealing

PTFE

•

•

14

Grooved pin

1.454215

Thrust ring

1.4571

16

Stud bolt

A4-70

•

17

Nut

A4-70

•

1.4571

•

18

Disc

PTFE

•

19

Tension spring

1.4310

•

20

Screw

A4-70

21

Distance bush1.4571•••

22

Distance bush1.4571

23

Bonnet sealing

PTFE with glass

•

•

24

O-ring

Viton

•

•

26

Screw

A4-70

EB 14b_EN
January 2024 edition
Subject to technical changes

•

15-3

Annex15.2.2 Spare parts for butterfly valve BR|14b (Type WNS)

Fig.|15-2: Exploded drawing of the BR 14b butterfly valve with adjustable stuffing box

Table|15-8: Recommended spare parts for the butterfly valve BR 14b (Type WNS)
Item

Description

Material
DIN

Spare part kit
ANSIcommissioning

2 year operation

1

Valve body1.4408 / 1.0619

A351 CF8M / A216 WCB

2Control shaft

1.4462 / 1.4542 / H1150

A182 F51 / AISI 630 / H1150D•

3

Valve disc1.4408A351 CF8M•

4

Seat ring

5

Fastening ring

1.4571PTFE spring washer preloaded

•

•

6

Adjustable stuffing box

1.45717

Cover

1.45718Disc1.4571

9

Packing

PTFE

•

•

11

Bearing bush

PTFE with carbon

•

•

12

Bearing bush

PTFE/glass or metal

•

•

13

Sealing

PTFE

•

•

14

Grooved pin

1.454216

Stud bolt

A4-70

•

17

Nut

A4-70

•

A479 F316Ti
A479 F316Ti

•

18

Disc

PTFE

•

19

Tension spring

1.4310

•

20

Screw

A4-70

21

Distance bush1.4571

22

Distance bush1.4571

23

Bonnet sealing

PTFE with glass

•

•

24

O-ring

Viton

•

•

26

Screw

A4-70

28

Washer

1.4571

15-4

•
•
•

•

EB 14b_EN
January 2024 edition
Subject to technical changes

Annex15.2.3 Spare parts for butterfly valve BR|14c (Type|WTD and MTD)

Fig.|15-3: Exploded drawing of the BR 14c butterfly valve with spring washer preloaded V-ring packing

Table|15-9: Recommended spare parts for the butterfly valve BR 14c (Type WTD and MTD)
Item

Description

1

Material

Spare parts kit

DIN

ANSI

Valve body

1.4571 / 1.0570

A240 Gr. 316L / A516 Gr.70

2Control shaft

1.4462 / 1.4542 / H1150

A182 F51 / AISI 630 / H1150D•

3

Valve disc1.4408A351 CF8M•

4

Metal seat ring

NickelSeat ring

PTFE disc spring preloaded

5

Fastening ring

1.4571

6

Stuffing box

1.4571

7

Covercommissioning•

2 year operation•

A479 F316Ti
A479 F316Ti
1.45718Disc1.4571

9

V-ring packing

1.4305 / PTFE

•

•

10

Disc spring set

1.8159 / Delta Tone

•

•

11

Bearing bush

PTFE with carbon

•

•

12

Bearing bush

PTFE/glass or metal

•

•

13

Sealing

PTFE

•

•

14

Grooved pin

1.446215

Thrust ring

1.4571

16

Stud bolt

A4-70

•

17

Nut

A4-70

•

•

18

Disc

PTFE

•

•

19

Tension spring

1.4310

•

•

20

Screw

A4-70

21

Distance bush1.4571

22

Distance bush1.4571

23

Cover sealing

PTFE with glass

•

•

24

O-ring

Viton

•

•

25

Intermediate flange

1.4305

26

Screw

A4-70

30

Screw

A4-70

EB 14b_EN
January 2024 edition
Subject to technical changes

•

•

15-5

Annex15.3 Service
For maintenance and repair work as well as malfunctions or defects, contact the After Sales Service at PFEIFFER for support.

E-mailThe After Sales Service can be reached at the e-mail address:
 sales-pfeiffer-de@samsongroup.com.

Necessary data
Provide the following information in the case of questions and fortroubleshooting:− Manufacturer number− Butterfly valve type
− Article number− Nominal size and version of the butterfly valve− Manual valve/automated valve− Medium (designation and consistency)− Medium pressure and temperature− Flow rate in m³/h
− Actuator signal pressure− Number of actuations (year, month, week or day)− Installation drawing if available− Completed declaration regarding contamination. This form isavailable at www.pfeiffer-armaturen.com.
Further information
The indicated <data sheets> and further information areavailable, also in English, at the following address:

PFEIFFER Chemie-Armaturenbau GmbH
Hooghe Weg 41 • 47906 Kempen
Phone: 02152 / 2005-0 • Telefax 02152 / 1580
E-Mail: sales-pfeiffer-de@samsongroup.com
Internet: www.pfeiffer-armaturen.com

15-6

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January 2024 edition
Subject to technical changes

EB 14b_EN
January 2024 edition
Subject to technical changes

EB 14b_EN
January 2024 edition
Subject to technical changes

EB 14b_EN
January 2024 edition
Subject to technical changes

PFEIFFER Chemie-Armaturenbau GmbH
Hooghe Weg 41 · 47906 Kempen · Germany
Phone: +49 2152 2005-0 · Fax: +49 2152 1580
E-Mail: sales-pfeiffer-de@samsongroup.com · Internet: www.pfeiffer-armaturen.com

EB 14b_EN
January 2024 edition
Subject to technical changes