Schmidt BA User manual

Schmidt Mess- und Regeltechnik
©2021 Schmidt Mess- und Regeltechnik
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Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
B-EN_BA-BB-BC-BF-20211021
1
•High reliability
•Installation in any orientation
•Suitable for hot water
•Thread connection, flange connection

Schmidt Mess- und Regeltechnik
©2021 Schmidt Mess- und Regeltechnik
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Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
B-EN_BA-BB-BC-BF-20211021
2
These instructions facilitate the safe and efficient handling of a flow limiter (referred to as "device" in
the following). The instructions are an integral part of the device and must be kept within easy reach for
the personnel in the immediate vicinity of the device at all times. Personnel must carefully read and
understand these instructions before commencing all work. The basic requirement for safe work is
adherence to all safety and handling instructions stipulated in these instructions. The local accident-
prevention regulations and general safety standards and regulations for the field of application of the
device also apply. Illustrations in these instructions are provided to aid general understanding and
might deviate from the actual model. No claims can be derived from any such differences.
Limitations of liability
All details and instructions in this manual have been compiled under consideration of the valid
standards and regulations, the current state-of-technology and our many years of knowledge and
experience. The manufacturer does not accept any liability arising from:
▪non-observance of any details in these instructions
▪improper use of the device, or use that is not in accordance with these instructions
▪use of non-trained personnel
▪unauthorized retrofitting or technical changes that have not been authorized by the manufacturer
▪use of non-approved replacement parts
The duties and obligations agreed upon in the delivery contract apply in full, as well as the general
terms and conditions, the terms of delivery by the manufacturer and the valid legal regulations
applicable at the conclusion of the contract.
Copyright
These operating instructions are protected by copyright.
Except for internal purposes, transfer of these instructions to third-parties, copying them in any way
–even in part –as well as dissemination and/or communication of their content is forbidden without
prior written authorization from the manufacturer. Violations are subject to claims for indemnification.
The manufacturer reserves the right to assert additional claims.
Copyright is the property of the manufacturer

Schmidt Mess- und Regeltechnik
©2021 Schmidt Mess- und Regeltechnik
Fon 0 67 32 - 91 91 20 Fax 0 67 32 - 96 24 42 [e-mail]
Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
B-EN_BA-BB-BC-BF-20211021
3
1 Overview 5
1.1 Short description 5
1.2 Warranty and guarantee provisions 5
1.3 Customer service 5
2 Safety 5
2.1 Explanation of symbols 5
2.2 Correct use in accordance with these instructions 6
2.3 Special precautions 7
2.3.1 Mechanical hazards 7
2.3.2 Hazards from high or low temperatures 8
2.3.3 Hazards caused by media 8
2.4 Personnel requirements 8
2.5 Personal safety equipment 9
2.6 Environmental protection 9
2.7 Responsibility of the owner 10
3 Design and function 11
3.1 Overview 11
3.2 Device description 11
4 Transport, packaging and storage 11
4.1 Safety instructions for transport 11
4.2 Transport inspection 12
4.3 Packaging 12
4.4 Symbols on the shipping box 12
4.5 Storage 13
5 Installation and initial startup 13
5.1 Safety 13
Content

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Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
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5.2 Requirements at the place of installation 13
5.3 Preparatory work 13
5.4 Installation in the pipeline 15
5.5 Initial startup 16
6 Operation 16
6.1 Operation basics 16
7 Troubleshooting 17
7.1 Safety 17
7.2 Troubleshooting guide 18
8 Maintenance 19
8.1 Safety 19
8.2 Maintenance table 19
8.3 Removal from the pipe system 19
8.4 Measures to be taken after maintenance work 20
9 Disassembly and disposal 21
9.1 Safety 21
9.2 Disassembly 21
9.3 Return materials 21
9.3.1 Return materials authorization 21
9.4 Disposal 21
10 Technical data 22
10.1 Device data plate 22
10.2 Operating data 22
10.3 General specifications 23
11 Annex 28
11.1 Replacement parts 28
11.2 Sealant 30
Important notes 31

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Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
B-EN_BA-BB-BC-BF-20211021
5
1. Overview
1.1 Short descriprion
Fig. 1: Flow limiter BF
The flow limiters of the series BA, BB, BC and BF
limit the flow of water through pipelines. They
keep the flow rate constant in case of fluctuations
in the flow rate. The flow limiters operate purely
on a mechanical principle and do not require any
auxiliary electrical energy.
The flow limiters use a regulating star. This
regulating star is deflected if the pressure
difference in the device increases. This limits the
cross-section where the flow can pass through.
The flow limiters work in a control pressure range
between 2 and 10 bar / 29 and 145 psi.
1.2 Warranty and guarantee provisions
Warranty and guarantee provisions are contained
in the general terms and conditions of the
manufacturer.
1.3 Customer service
For technical support, please contact our
customer service department. Furthermore, our
staff is always interested in receiving new
information and experiences gained from
application of the device, which may be useful in
improving our products info@schmidt-
messtechnik.de).
2. Safety
This chapter provides an overview of important
safety aspects required for optimum protection of
personnel as well as for safe installation and safe
operation of the device.
Non-observance of the handling and safety
instructions listed in this manual may result in
hazardous/dangerous conditions and in damage
to property.
2.1 Explanation of symbols
Safety instructions
Safety instructions in this manual are marked by
symbols. The safety instructions are preceded by
signal words that indicate the level of danger/
hazard.
To prevent accidents or injury to persons as well
as damage to property, always observe the
safety instructions and proceed carefully.

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Operating Manual
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Danger!
This combination of symbol and signal word
indicates an immediate, dangerous condition that
results in death or serious injury if it is not
avoided.
Warning!
This combination of symbol and signal word
indicates an immediate, dangerous condition that
results in death or serious injury if it is not
avoided.
Caution!
This combination of symbol and signal word
indicates a possibly dangerous condition that
might result in minor or slight injury if it is not
avoided.
Notice!
This combination of symbol and signal word
indicates a possibly dangerous condition that
might result in damage to property and to the
environment if it is not avoided.
Tips and recommendations
This symbol emphasizes useful tips and
recommendations as well as information for
efficient and failure-free operation.
Signs used in these instructions
The following signs and highlightings are used in
these instructions to identify handling instructions,
the description of results, lists/enumerations,
references and other elements:
1. Designates step-by-step handling instructions
Designates a state or an automatic sequence
as a result of a specific operating step
▪Designates randomly ordered enumerations and
list entries
Designates references to chapters in these
instructions
2.2. Correct use in accordance with these
instructions
The device is designed and constructed
exclusively for the intended use described herein.
Danger!
The Fahrenheit and PSI measurement units in
these operating instructions have been rounded
down for easier readability!
Always refer to the metric units for calculations and
dimensioning of e.g. the pipe system!
Table 1: Correct use in non-hazard areas
The flow limiter serves exclusively to limit or
regulate the continuous flow of water within a
temperature range of 0 °C to 200 °C / 32 °F to
392 °F. The required control pressure
is between 2 and 10 bar / 29 psi and 145 psi. The
maximum operating pressure is 10 bar / 145 psi.
!
i

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Correct use in explosion-hazard zones
Danger!
This device is not certified for the use in
explosion-hazard zones!
Warning!
Danger due to incorrect use!
Incorrect use of the flow limiter may result in
dangerous conditions
▪Use the flow limiter only within the stipulated
performance limits
▪Do not subject the flow limiter to severe
temperature fluctuations
▪Do not use the flow limiter with quick-acting
valves
▪Do not use the flow limiter with solenoid
valves
▪Do not subject the flow limiter to vibrations
▪Do not subject the flow limiter to pressure
surges
▪Do not use the flow limiter with media
containing solids or abrasives
▪Use the flow limiter only with media previously
approved by the manufacturer
All claims for damages due to incorrect usage
are excluded.
2.3 Special precautions
To reduce health risks and prevent dangerous
conditions, observe the safety instructions listed
here as well as the safety instruction in the other
chapters of these Operating Instructions.
These operating instructions cannot cover all
conceivable dangers because many dangers
arise, not from the device itself, but from the
respective media flowing through it. Always
observe the appropriate safety data sheets when
using hazardous media!
2.3.1 Mechanical hazards
Warnung!
Risk of injury due to fractured housing and
leakage!
Unauthorized temperatures or excessive
pressure may cause the flow limiter body or the
process connections to burst. Injuries may be
caused by flying parts and escaping media.
▪Keep within the stipulated operating conditions
▪Wear personal protective equipment
▪Avoid severe temperature fluctuations
▪Avoid pressure surges
i

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Warning!
Risk of injury on sharp edges and pointed
corners!
Sharp edges and pointed corners can cause
abrasions and skin cuts
▪Proceed with caution when working near
sharp edges and pointed corners
▪If in doubt, wear protective gloves
2.3.2 Hazards from high or low temperatures
Hot or cold surfaces
Warning!
Risk of injury from hot or cold surfaces!
Surfaces of components may heat up/cool down
dramatically due to the media flowing through
them. Skin contact with hot or cold surfaces may
cause severe skin burn or frostbite.
▪Always wear temperature resistant protective
work clothing and protective gloves when
working near hot/cold surfaces
▪Before commencing work, make sure that all
surfaces have been cooled down or warmed
up to ambient temperature
2.3.3 Hazards caused by media
Hazardous media
Warning!
Risk of injury from hazardous media!
If the flow monitor is used for toxic, corrosive or
very hot/cold media, there is a risk of serious
injury from escaping media.
▪Observe details in the safety data sheet of the
media
▪Comply with the safety, accident prevention
and environmental protection regulations
appropriate to the media used
▪Wear personal protective equipment in
accordance with the safety data sheet
2.4 Personnel requirements
Warning!
Risk of injury due to insufficiently trained and
qualified personnel!
If unqualified personnel work on the device or are
located within its hazard zone, dangers arise
which may result in serious injury and
considerable damage to property.
▪All work must be performed by qualified
personnel only.
▪Keep unqualified personnel away from hazard
zones.
Authorized personnel is to be restricted to those
persons who can be expected to perform their
work reliably. Persons whose ability to respond
is influenced, e.g. by drugs, alcohol or
medication, are not authorized.
Observe the age and occupational regulations
at the site when choosing personnel.
The following lists the personnel qualifications
for the various areas of activity:

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Qualified personnel
Due to their specialized training, knowledge and
experience as well as their knowledge of the
relevant standards and regulations, qualified
personnel are able to independently perform the
work assigned to them as well as to detect and
avoid possible risks and dangers.
2.5 Personal safety equipment
Personal safety equipment is used to protect
personnel from hazards or dangers that might
impair their safety or health during work.
When performing the various tasks at, and with
the device, personnel must wear personal safety
equipment. Special reference is made of this in
the individual chapters within these Operating
Instructions. The following provides a description
of the personal safety equipment:
▪Always wear appropriate personal safety
equipment required in the various chapters of
these Operating Instructions before
commencing work.
▪Comply with the personal safety equipment
instructions posted within the work area.
Description of personal safety equipment
As specified in the Safety Data Sheet of the
medium, protective equipment must be worn
when handling hazardous media. In addition,
the specifications of the system operator must be
followed. If no protective equipment is specified,
suitable protective gloves and goggles must be
worn.
The protective equipment is used to protect
against hazardous media leaks and hazardous
media residue in the device.
Goggles
The goggles are used to protect the eyes from
flying debris and splashing fluid.
Protective gloves
Protective gloves protect the hands from friction,
burns, grazing, abrasion, surface cuts or deeper
injuries, as well as from direct contact with hot or
cold surfaces.
2.6 Environmental protection
Notice!
Risk to the environment due to improper
handling of environmentally hazardous
substances!
Serious environmental damage may result if
substances harmful to the environment are
handled incorrectly, especially if they are
disposed of improperly.
▪Always observe the instructions listed below
on the handling and disposal of substances
harmful to the environment.
▪If harmful substances are released into the
environment, take immediate
countermeasures. If there is doubt, contact the
local authorities, inform them of the damage
and request information on suitable
countermeasures to be taken.
i

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Cleaning fluids
Solvent-based cleaning fluids contain toxic
substances. They must never be released into
the environment and must be disposed of by a
waste management company.
Lubricants
Lubricants such as greases and oils contain toxic
substances. They must never be released into
the environment and must be disposed of by a
waste management company.
2.7 Responsibility of the owner
Owner
The owner is the person who operates the device
himself for business or commercial purposes or
who cedes such use/application to a third-party
and who, during operation of the device, has full
legal product stewardship for protection of the
user, the personnel or third-parties.
Duties of the owner
The device is used in the commercial sector. The
owner of the device is therefore subject to legal
obligations pertaining to work safety.
In addition to the safety instructions contained in
these Operating Instructions, the safety, accident
prevention and environmental protection
regulations applicable to the field of application
of the device must be observed
In particular, this includes:
▪The owner must inform himself regarding the
valid health and safety regulations and must
perform a risk assessment to additionally
determine the risks resulting from the special
work conditions arising at the location at which
the device is used, especially in regard to the
media used. He must then implement these
within Operating Instructions for use of the
device.
▪For the USA:
The "Occupational Health and Safety Act" of
1970 stipulates that it is the duty of the owner
to provide a safe workplace. He must hereby
ensure that the device is operated and main-
tained compliant to valid commercial, industry-
al, local, federal and state laws, standards and
regulations.
▪For Canada:
The "Canadian Centre for Occupational Health
and Safety Act" of 1978 stipulates that all
Canadians have “…a fundamental right to a
healthy and safe working environment.” It is
therefore the duty of the owner to provide a
safe workplace. He must ensure that the
device is operated and maintained compliant
to valid commercial, industrial, local,
provincial, territorial and federal laws,
standards and regulations.
▪Appropriate to the working conditions and the
media used, the owner must affix signs within
the working area that inform the user of the
hazards and dangers present.
▪During the entire period of use of the device,
the owner must check periodically to ensure
that the Operating Instructions correspond to
the current state of regulations, and he must
make adjustments as necessary.
▪The owner must clearly regulate and deter-
mine responsibilities for installation, operation,
troubleshooting, maintenance and cleaning.
▪The owner must fit/retrofit suitable safety
equipment within the complete plant/system.
▪The owner must ensure that all staff/personnel
have thoroughly read and understand these
instructions before handling the device.
Additionally, he must train the personnel at
regular intervals and warn them of dangers.
The owner must provide the personnel with
the required safety equipment and must
instruct them that its wear is mandatory

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Additionally, the owner is responsible for
ensuring that the device is always kept in a
technically perfect condition. The following
therefore applies:
▪The owner must implement suitable safety
measures, appropriate to the media used.
▪Different media have different severities of
influence on the soiling and wear of/to the
device. The owner must set suitable
maintenance intervals, depending on the
media flowing through the device..
▪The owner must ensure that the maintenance
intervals described in these Operating
Instructions are adhered to at all times.
▪The owner must ensure that the device is
completely free of all residual media before
disposal. Remains of corrosive or toxic
materials must be neutralized.
3 Design and function
3.1 Overview
Fig. 2: Overview Flow limiter
1 Device body (BF = Flange)
2 Regulating star
3 Cone
4 Rivet
5 Retaining ring
3.2 Device description
The flow limiters of the series BA, BB, BC and BF
limit the flow of water through pipelines. They
keep the flow rate constant in case of fluctuations
in the flow rate. The flow limiters operate purely
on a mechanical principle and do not require any
auxiliary electrical energy.
The flow limiters use a regulating star. This
regulating star is deflected if the pressure
difference in the device increases. This limits the
cross-section where the flow can pass through.
The flow limiters work in a control pressure
range between 2 and 10 bar / 29 and 145 psi.
Applications for the flow limiters BA, BB, BC and
BF are e. g. water supply for machines and
equipment, irrigation, water treatment. The flow
limiter ensures that an almost constant flow rate
is achieved.
4 Transport, packaging and storage
4.1 Safety instructions for transport
Improper transport
Notice!
The device could be damaged if transported
improperly!
Objects to be transported may fall or overturn if
transported improperly. This may result in
damage to the device and/or property.
▪Proceed carefully when unloading transported
packages, both on delivery and when
transporting inhouse. Observe the symbols
and instructions on the shipping box
▪Remove packaging material just prior to
assembly

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4.2 Transport inspection
On delivery, make an immediate check for
completeness and check for transport damages.
If there are any visible external transport
damages, proceed as follows:
▪Do not accept the delivery
▪Note the damage in the shipping documents
or on the delivery note of the transporter and
have the driver confirm by signature
▪Initiate a claim for damages
Make a claim for each fault as soon as it is
detected. Claims for damages can only be
invoked within the valid claim periods.
4.3 packaging
Packaging
The packaging serves to protect the individual
components from transport damages, corrosion
and other damages until they are installed. Do
not discard the packaging and only remove the
device from the shipping box immediately before
installation.
Handling packaging materials
Dispose of packaging material in accordance
with the valid legal regulations and local
ordinances.
Notice!
Danger to the environment due to incorrect
disposal!
Packaging is made of valuable raw materials and
can be reused in many cases or usefully
processed and recycled. Improper disposal of
packaging materials may pose a danger to
the environment.
▪Dispose of packaging material in an
environmentally safe manner
▪Comply with the local disposal regulations. If
necessary, have the packaging disposed of by
approved specialists.
4.4 Symbols on the shipping box
Top
The arrows indicate the top side of the package.
They must always point upwards, otherwise the
content may be damaged.
Fragile
Designates packages with breakable or
damageable contents.
Handle the package carefully and do not allow it
to fall or be subjected to jarring or severe
vibration.

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4.5 Storage
Storing the packages
Store the packages under the following
conditions:
▪Do not store in the open
▪Store dry and dust-free
▪Do not subject to any aggressive media
▪Protect from direct sunlight
▪Avoid mechanical vibrations and shocks
▪Storage temperature: 0 to 35 °C / 32 °F to
95°F
▪Relative humidity: max. 60 %
▪Do not stack
▪If storing for longer than 3 months, regularly
check the general condition of all parts as well
as of the packaging.
Storage instructions in addition to the instructions
listed here may be listed on the packages. Follow
these instructions also.
5 Installation and initial startup
5.1 Safety
Incorrect installation and initial startup
Warning!
Risk of injury due to incorrect installation and
initial startup!
Incorrect installation and initial startup may result
in severe injury and considerable damage to
property..
▪Ensure that the site is sufficiently cleared of
obstructions before commencing work
▪Handle open or sharp edged components
carefully
▪Ensure that the assembly location is orderly
and clean! Parts and tools lying about or on
top of each other are potential causes for
accidents
▪Assemble components properly. Observe the
stipulated tightening torque of screws
▪Before initial startup, make sure that all
installation work has been performed and
completed in compliance with the
specifications and instructions in these
Operating Instructions
5.2 Requirements at the place of installation
The place of installation must meet the
following requirements:
▪The device must not be under water.
▪The surrounding area must be sufficiently
illuminated.
▪There must be sufficient space to prevent
accumulation of trapped heat.
▪The device must not be installed as a
supporting part in a pipe construction.
▪The device may not have anything affixed to,
or suspended from it.
▪The flow limiter must be installed in such a
way as to preclude damage by outside force. It
must be ensured that the flow limiter cannot
be damaged. If necessary, install an
appropriate impact protection device.
▪A suitable process connection for the device
must be available.
5.3 Preparatory work
The following requirements must be met during
installation to ensure correct functioning of the
flow limiter:
i

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Warning!
Danger due to incorrect installation!
If the requirements listed above are not met
when installing the flow limiter, dangerous/
hazardous conditions may arise.
▪Do not install the flow limiter as a supporting
part in a pipe system
▪Do not use the flow limiter with quick-acting
valves
▪Do not use the flow limiter with solenoid
valves
Unimpeded flow sections
Notice!
Regulation inaccuracy due to incorrect
installation!
The regulation accuracy of the flow limiter is
influenced by its position within the pipe system.
Changes in cross-section, branch-offs or bends
in the pipe system impair regulation accuracy.
▪Ensure that the unimpeded flow sections are
maintained
▪Never reduce the pipe diameter immediately
before the device
We recommend unimpeded flow sections, type
BS-228.
▪An unimpeded flow section of 10 x DN (rated
width) must be maintained before the device.
▪An unimpeded flow section of 5 x DN (rated
width) must be maintained after the device.
Unimpeded outlet
If the pipe system ends at an unimpeded outlet,
the flow limiter must not be installed directly in
front of the opening. The device must always be
completely filled with media to ensure regulation
accuracy.
We recommend a Type SF, SFD or SFM
strainer.
Prepare the device
Notice!
Risk of damage to property due to
contamination!
Contamination and deposits may impair the free
movement of the regulating star, thereby
damaging the device.
▪Ensure that there are no foreign particles in
the device
▪Ensure that the device is not soiled
▪Do not use any medium containing solids
Due to quality assurance measures, there may
be some test medium (water) residue in the
device.
1. Unpack the device and visually inspect the
device to ensure that it is free of packaging
materials
2. Examine the device for residue of test
medium and drain, if necessary
3. Check the device for soiling and flush with
clean medium, if necessary
!
i
i
!
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3. Überprüfen Sie das Gerät auf
Verschmutzungen und spülen Sie es ggf. mit
sauberem Medium durch
5.4 Installation in the pipeline
Warning!
Risk of injury from pressurized lines!
If the pipeline is under pressure when installing
the device, severe injury may result.
▪Depressurize the pipeline before installing the
device
Warning!
Risk of injury from hot or cold surfaces!
Pipelines can heat up or cool down dramatically
due to the media flowing through them. Skin
contact with hot or cold surfaces may cause
severe skin burn or frost bite.
▪Before commencing work, ensure that the
system has been controlled to a temperature
range between 0 and 40 °C / 32 and 104 °F.
▪Do not touch any parts of the system that are
either very hot or very cold.
▪Always wear heat-resistant or cold-resistant
protective work clothing and protective gloves
when working near hot or cold surfaces
Warning!
Risk of injury from media in the pipe system
If the pipeline contains toxic or other hazardous
media, severe injury may be caused by escaping
media.
▪Before installation, ensure that the pipeline is
empty and does not contain any media
residue
▪Always wear personal protective equipment
during installation
▪Provide suitable draining devices (drip pans,
collection tank, etc.)
Notice!
Installation of filters in the pipeline
If the medium is not free of contamination, filters
must be installed.
Notice!
Risk of damage to device due to
contamination in the pipeline!
Dirt and foreign particles entering the device can
damage the device and impair its operation.
▪Ensure that the pipeline is clean before
installing the device
▪If necessary, flush the pipeline with clean
medium before installation
A suitable sealant must be selected, depending
on the condition/composition of the pipelines, the
medium and the operating and environmental
conditions..
!
!
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Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
B-EN_BA-BB-BC-BF-20211021
16
Installing the device in the pipe system
Personnel:
▪Qualified personnel
Protective equipment:
▪As specified in the Safety Data Sheet of the
medium, protective equipment must be worn
when handling hazardous media. In addition,
the specifications of the system operator must
be followed. If no protective equipment is
specified, suitable protective gloves and
goggles must be worn.
▪Protective gloves
▪Goggles
1. Properly seal the pipeline
2. Install the device in the pipeline using a
suitable tool. Observe the direction of flow on
the device body
5.5 Initial startup
The following steps must be taken before initial
startup and any subsequent startup (e.g. after
removal and installation during maintenance).
Warning!
1. Ensure that the plant is operating vibration-
free. Vibrations could destroy the device. This
may result in serious injury to the user.
Warning!
2. Ensure that the medium is flowing
continuously. Pulse-like staggered loads
could destroy the device. This may result in
serious injury to the user.
Notice!
3. Completely fill the pipelines. Partial filling(s)
may result in malfunctions and damage to the
device.
Notice!
4. Vent the pipeline. If there are air pockets in
the line during the measurement, this could
result in damage to the device caused by
hydraulic shock. This may cause
malfunctions.
Notice!
5. Ensure that the plant is operating without
cavitation. Cavitation may result in
malfunctions and damage to the device.
The static pressure at the flow limiter inlet must
always be greater than or equal to the pressure
at the flow limiter outlet. The pressure difference
between the inlet pressure and the outlet
pressure (control pressure) must not exceed
10 bar / 145 psi. To ensure that the flow limiter
works properly, a minimum control pressure of
2 bar / 29 psi is required.
6 Operation
6.1 Operation basics
The flow limiter limits the flow through the pipe
system. Upon purchasing the device, the flow
rate has to be specified. Setting or reading-off the
flow rate on the device is not possible.
!
!
!

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Operating Manual
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7 Troubleshooting
This chapter describes possible malfunctions
of the device, their causes and repair.
If malfunctions persist or increase, shorten the
maintenance interval to meet the actual operating
conditions.
For malfunctions not described in this chapter,
please contact the manufacturer.
7.1 Safety
Work performed incorrectly to remedy a
malfunction
Warning!
Risk of injury due to incorrect repair of
malfunction!
Work performed incorrectly may result in severe
injury and considerable damage to property.
▪Ensure that the site is sufficiently cleared
before commencing work
▪Ensure that the repair location is orderly and
clean! Components and tools that are lying
about or on top of each other are potential
causes of accidents
▪If components have been removed, observe
correct assembly procedures. Reinstall all
fixing/fastening elements and observe the
prescribed tightening torque for the screws
▪Before placing the device back into operation,
ensure that all work has been performed and
completed in compliance with the
specifications and instructions in these
Operating Instructions
Conduct in case of malfunction
The complete machine or system may be unsafe
if there is a defect at the flow limiter (e.g.
fractured housing).
The following always applies:
1. In case of malfunctions that present an
immediate danger to persons or valuables,
proceed according to the valid emergency
plans for the system
2. Determine the cause of the malfunction
3. Before repair, ensure that there is no danger
to persons from escaping media
4. If necessary, allow the pipeline and device to
cool down or to warm up before commencing
work
5. Malfunctions must be corrected by qualified
personnel
The following troubleshooting guide provides an
indication of who is qualified to repair the fault .
i

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Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
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7.2 Troubleshooting guide

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Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
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8 Maintenance
8.1 Safety
Maintenance work performed incorrectly
Warning!
Risk of injury due to maintenance
work performed incorrectly!
Maintenance work performed incorrectly can
result in severe injury and considerable damage
to property.
▪Ensure that the site is sufficiently cleared
before commencing work.
▪Ensure that the repair location is orderly and
clean! Components and tools that are lying
about or on top of each other are potential
causes for accidents.
▪Before placing the device back into operation
ensure that all work has been performed and
completed in compliance with the
specifications and instructions in these
Operating Instructions.
8.2 Maintenance table
Maintenance interval and replacement of
defective parts
Notice!
▪Disassembling the device is prohibited!
Disassembling the device will void the
warranty!
▪Disassembly and replacement of defective
parts may only be performed by the
manufacturer! Only maintenance work is
allowed, which does not require disassembly.
The device must be returned to the manufacturer
for maintenance requiring disassembly.
The following maintenance work can be
performed without disassembling the device:
8.3 Removal from the pipe system
The flow limiter must first be removed
from the pipe system before performing
maintenance.
Warning!
Risk of injury from pressurized lines!
Severe injury may result if the pipe system is
under pressure when removing the device.
▪Depressurize the system before removing the
device
Warning!
Risk of injury from hot or cold surfaces!
Pipelines can heat up/cool down dramatically
due to the media flowing through them. Skin
contact with hot or cold surfaces causes severe
skin burn or frostbite.
Intervall Maintenance work Personnel
As
required
Check the device for
any signs of leakage Qualified personnel
Clean the device Qualified
personnel

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Operating Manual
Flow Limiter BA, BB, BC, BF
Mechanical flow limiter
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▪Before removing the device, ensure that the
▪machine or system and the flow limiter have
been controlled to a temperature range
between 0 and 40 °C
▪Do not touch any part of the machine or
system that is either very hot or very cold
▪Always wear heat-resistant / cold-resistant
protective work clothing and protective gloves
when working near hot/cold surfaces
Warning!
Risk of injury from media in the pipe system!
If the pipe system contains hazardous media,
severe injury may be caused by escaping media.
▪Before removing the device, ensure that the
pipe system is empty and does not contain
media residue
▪Always wear personal protective equipment
when removing the device
Warnung!
Risk of injury from media residue in the
device!
After the pipe system has been emptied, media
residue may still be present inside the device. In
the case of hazardous media, this could result
in serious injury.
▪When removing (de-installing the device from
the pipe system), always wear personal
protective equipment.
▪All requirements specified in the media safety
data sheet must be observed in accomplishing
the work task.
▪Residue of hazardous media in the device can
result in serious injury.
Removing the device from the pipe system
Personnel:
▪Qualified personnel
Protective equipment:
▪As specified in the Safety Data Sheet of the
medium, protective equipment must be worn
when handling hazardous media. In addition,
the specifications of the system operator must
be followed. If no protective equipment is
specified, suitable protective gloves and
goggles must be worn.
1. Loosen the adapter union of the pipeline
using a suitable tool. When doing so, lock the
process connection or device body in place
with a suitable tool.
2. Secure the device against falling and repeat
Step 1 at the other process connection.
8.4 Measures to be taken after maintenance
work
Take the following steps after completion of
maintenance work and before switching on the
device:
1. Check all previously loosened / released
screw connections for tightness.
2. Clean the work area and remove all residual
materials, packaging, substances or spills.