KSB KWT51 Installation instructions

KSB Quench System
KWT51
Installation/Operating Manual

Legal information/Copyright
Installation/Operating Manual KWT51
Original operating manual
All rights reserved. The contents provided herein must neither be distributed, copied, reproduced,
edited or processed for any other purpose, nor otherwise transmitted, published or made available to a
third party without the manufacturer's express written consent.
Subject to technical modification without prior notice.
© KSB SE & Co. KGaA, Frankenthal 30/06/2022

Contents
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Contents
1 General.................................................................................................................................................... 5
1.1 Principles ...........................................................................................................................................................5
1.2 Target group.....................................................................................................................................................5
1.3 Other applicable documents............................................................................................................................5
1.4 Symbols .............................................................................................................................................................5
1.5 Key to safety symbols/markings.......................................................................................................................6
2 Safety...................................................................................................................................................... 7
2.1 General..............................................................................................................................................................7
2.2 Intended use .....................................................................................................................................................7
2.3 Personnel qualification and training...............................................................................................................7
2.4 Consequences and risks caused by non-compliance with this manual .........................................................7
2.5 Safety awareness ..............................................................................................................................................8
2.6 Safety instructions for the operator/user........................................................................................................8
2.7 Safety information for maintenance, inspection and installation ................................................................8
2.8 Unauthorised modes of operation..................................................................................................................8
3 Transport/Storage/Disposal .................................................................................................................. 9
3.1 Checking the condition upon delivery............................................................................................................9
3.2 Transport...........................................................................................................................................................9
3.3 Storage/preservation........................................................................................................................................9
3.4 Return to supplier...........................................................................................................................................10
3.5 Disposal ...........................................................................................................................................................10
4 Description............................................................................................................................................ 11
4.1 General description ........................................................................................................................................11
4.2 Product information as per Regulation No. 1907/2006(REACH).................................................................11
4.3 Designation.....................................................................................................................................................11
4.4 Name plate......................................................................................................................................................11
4.5 Design details..................................................................................................................................................12
4.6 Configuration and function...........................................................................................................................12
5 Installation at Site................................................................................................................................ 15
5.1 Determining the position of the quench reservoir ......................................................................................15
5.2 Aligning and fastening the quench reservoir...............................................................................................15
5.3 Connections to the mechanical seal..............................................................................................................15
5.4 External connections to the KSB quench system..........................................................................................15
6 Commissioning/Start-up/Shutdown................................................................................................... 16
6.1 Safety instructions for operation...................................................................................................................16
6.2 Commissioning/Start-up.................................................................................................................................16
6.2.1 Prerequisites for commissioning/start-up .........................................................................................16
6.2.2 Selecting the quench liquid/ buffer fluid ........................................................................................17
6.2.3 Commissioning/ starting up the KSB quench system with unpressurised quench liquid/ buffer
fluid, operating mode to API Plan51 or API Plan52.......................................................................18
6.3 Operating limits..............................................................................................................................................18
6.4 Shutdown/storage/preservation ....................................................................................................................19
6.4.1 Measures for dismantling..................................................................................................................19
6.4.2 Measures to be taken for shutdown ................................................................................................20
6.4.3 Returning to service...........................................................................................................................20
7 Maintenance......................................................................................................................................... 21
7.1 Safety regulations...........................................................................................................................................21
7.2 Maintenance/inspection.................................................................................................................................21
7.3 Drainage/cleaning ..........................................................................................................................................23

Contents
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8 Trouble-shooting.................................................................................................................................. 24
9 Related Documents.............................................................................................................................. 25
9.1 General drawings with list of components...................................................................................................25
9.1.1 KSB quench system KWT51F80014....................................................................................................25
9.2 Drawings and general arrangement drawings for the Etanorm type series ..............................................26
10 Certificate of Decontamination........................................................................................................... 27

1 General
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1 General
1.1 Principles
This operating manual is valid for the type series and variants indicated on the front
cover.
The operating manual describes the proper and safe use of this equipment in all
phases of operation.
The name plate indicates the type series and main operating data. The order number
and year of production clearly identify the thermosyphon system and serve as
identification for all further business processes.
In the event of damage, immediately contact your nearest KSB service facility to
maintain the right to claim under warranty.
1.2 Target group
This operating manual is aimed at the target group of trained and qualified specialist
technical personnel.
1.3 Other applicable documents
Table1: Overview of other applicable documents
Document Contents
Data sheet Description of the technical data of the pump (set)
in which the KSB quench system is installed.
General arrangement drawing/
outline drawing
Description of connections and installation
dimensions for the KSB quench system, weights
General assembly drawing Description of the KSB quench system as a
sectional drawing
Sub-supplier product literature Operating manuals and other product literature
describing accessories and integrated machinery
components
For accessories and/or integrated machinery components, observe the relevant
manufacturer's product literature.
1.4 Symbols
Table2: Symbols used in this manual
Symbol Description
✓Conditions which need to be fulfilled before proceeding with the
step-by-step instructions
⊳Safety instructions
⇨Result of an action
⇨Cross-references
1.
2.
Step-by-step instructions
Note
Recommendations and important information on how to handle
the product

1 General
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1.5 Key to safety symbols/markings
Table3: Definition of safety symbols/markings
Symbol Description
!DANGER
DANGER
This signal word indicates a high-risk hazard which, if not avoided,
will result in death or serious injury.
!WARNING
WARNING
This signal word indicates a medium-risk hazard which, if not
avoided, could result in death or serious injury.
CAUTION
CAUTION
This signal word indicates a hazard which, if not avoided, could
result in damage to the machine and its functions.
Explosion protection
This symbol identifies information about avoiding explosions in
potentially explosive atmospheres in accordance with EU Directive
2014/34/EU (ATEX).
General hazard
In conjunction with one of the signal words this symbol indicates a
hazard which will or could result in death or serious injury.
Electrical hazard
In conjunction with one of the signal words this symbol indicates a
hazard involving electrical voltage and identifies information about
protection against electrical voltage.
Machine damage
In conjunction with the signal word CAUTION this symbol indicates
a hazard for the machine and its functions.

2 Safety
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2 Safety
!DANGER
All the information contained in this section refers to hazardous situations.
In addition to the present general safety information the action-related safety
information given in the other sections must be observed.
2.1 General
▪This operating manual contains general installation, operating and maintenance
instructions that must be observed to ensure safe operation of the system and
prevent personal injury and damage to property.
▪Comply with all the safety instructions given in the individual sections of this
operating manual.
▪The operating manual must be read and understood by the responsible specialist
personnel/operators prior to installation and commissioning.
▪The contents of this operating manual must be available to the specialist
personnel at the site at all times.
▪Information and markings attached directly to the product must always be
complied with and kept in a perfectly legible condition at all times. This applies
to, for example:
– Markings for connections
– Name plate
▪The operator is responsible for ensuring compliance with all local regulations not
taken into account.
2.2 Intended use
▪Consult the manufacturer about any use or mode of operation not described in
the data sheet or product literature.
▪This product must only be operated within the limit values stated in the technical
product literature for the ambient temperature, density, pressure, temperature
and in compliance with any other instructions provided in the operating manual
or other applicable documents.
▪The product must only be operated in the fields of application and within the use
limits specified in the other applicable documents.
2.3 Personnel qualification and training
▪ All personnel involved must be fully qualified to install, operate, maintain and
inspect the product this manual refers to.
▪The responsibilities, competence and supervision of all personnel involved in
transport, installation, operation, maintenance and inspection must be clearly
defined by the operator.
▪Deficits in knowledge must be rectified by means of training and instruction
provided by sufficiently trained specialist personnel. If required, the operator can
commission the manufacturer/supplier to train the personnel.
▪ Training on the product must always be supervised by specialist technical
personnel.
2.4 Consequences and risks caused by non-compliance with this manual
▪Non-compliance with these operating instructions will lead to forfeiture of
warranty cover and of any and all rights to claims for damages.
▪Non-compliance can, for example, have the following consequences:
– Hazards to persons due to electrical, thermal, mechanical and chemical
effects and explosions
– Failure of important product functions
– Failure of prescribed maintenance and servicing practices

2 Safety
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– Hazard to the environment due to leakage of hazardous substances
2.5 Safety awareness
In addition to the safety information contained in this operating manual and the
intended use, the following safety regulations shall be complied with:
▪Accident prevention, health regulations and safety regulations
▪Explosion protection regulations
▪Safety regulations for handling hazardous substances
▪Applicable standards, directives and laws
2.6 Safety instructions for the operator/user
▪Fit protective equipment (e.g. contact guards) supplied by the operator for hot,
cold or moving parts, and check that the equipment functions properly.
▪Do not remove any protective equipment (e.g. contact guards) during operation.
▪Provide the personnel with protective equipment and make sure it is used.
▪Contain leakages (e.g. at the shaft seal) of hazardous fluids handled (e.g.
explosive, toxic, hot) so as to avoid any danger to persons and the environment.
Adhere to all relevant laws.
▪Eliminate all electrical hazards. (In this respect refer to the applicable national
safety regulations and/or regulations issued by the local energy supply
companies.)
2.7 Safety information for maintenance, inspection and installation
▪Modifications or alterations are only permitted with the manufacturer's prior
consent.
▪Use only original spare parts or parts/components authorised by the
manufacturer. The use of other parts/components can invalidate any liability of
the manufacturer for resulting damage.
▪The operator ensures that maintenance, inspection and installation are
performed by authorised, qualified specialist personnel who are thoroughly
familiar with the manual.
▪Any work on the product shall only be performed when it has been disconnected
from the power supply (de-energised).
▪Carry out work on the product during standstill only.
▪The product and its components (e.g. reservoir, piping) must have reached
ambient temperature.
▪When taking the product out of service always adhere to the procedure
described in the operating manual.
▪Decontaminate products which handle fluids posing a health hazard.
▪As soon as the work has been completed, re-install and re-activate any safety-
relevant devices and protective devices. Before returning the product to service,
observe all instructions on commissioning. (ðSection6.2,Page16)
▪Keep unauthorised persons (e.g. children) away from the product.
▪Any welding work at the quench reservoir is prohibited.
2.8 Unauthorised modes of operation
Never operate the product outside the limits stated in the data sheet and in this
manual.
The warranty relating to the operating reliability and safety of the product supplied
is only valid if the product is used in accordance with its intended use.

3 Transport/Storage/Disposal
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3 Transport/Storage/Disposal
3.1 Checking the condition upon delivery
1. On transfer of goods, check each packaging unit for damage.
2. In the event of in-transit damage, assess the exact damage, document it and
notify KSB or the supplying dealer and the insurer about the damage in writing
immediately.
3.2 Transport
DANGER
The KSB quench system could slip out of the suspension arrangement.
Danger to life from falling parts!
▷Only transport the KSB quench system in the specified position.
▷Observe the information on weights, centre of gravity and fastening points.
▷Observe the applicable local accident prevention regulations.
▷Use suitable and permitted transport equipment, e.g. crane, forklift or pallet
truck.
CAUTION
Improper transport
Damage to the KSB quench system!
▷Only transport the KSB quench system in suitable packaging.
▷Observe the weights, symbols and instructions indicated on the packaging.
▷Use suitable, approved lifting accessories.
Transport the KSB quench system carefully.
The original packaging is suitable for dry transport by forwarding agents (truck, rail,
air).
3.3 Storage/preservation
If commissioning is to take place some time after delivery, we recommend that the
following measures be taken:
CAUTION
Improper storage
Damage due to humidity, vermin, corrosion and contamination!
▷Avoid outdoor storage.
▷Observe, check and record the storage conditions.
▷Regularly check the packaging for any damage.
▷Regularly check the humidity indicator of shrink-wrapped objects. The relative
humidity should be <50%.
▷If the relative humidity indicated for shrink-wrapped objects >50%, have the
equipment repacked by the manufacturer.

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CAUTION
Wet, contaminated or damaged openings and connections
Damage to the KSB quench system!
▷Only open the screw plugs and connections of the KSB quench system during
installation.
▷Avoid opening screw plugs and connections before that time.
Store the KSB quench system in its original packaging, placed on a level surface in a
dry, protected room in which the following conditions are consistent:
▪Relative humidity <65%
▪Temperature between 15°C and 25°C
▪Moderately vented atmosphere
▪Dust-free and vermin-free
New KSB quench systems are supplied by our factory duly prepared for storage.
3.4 Return to supplier
1. Prior to returning the product to the supplier, flush and clean it, particularly if it
has been used in noxious, explosive, hot or other hazardous fluids.
2. If the product has been used in fluids whose residues could lead to corrosion
damage in the presence of atmospheric humidity or could ignite upon contact
with oxygen, the product must also be neutralised and treated with anhydrous
inert gas to ensure drying.
3. Always complete and enclose a certificate of decontamination when returning
the product. (ðSection10,Page27)
Indicate any safety measures and decontamination measures taken.
NOTE
If required, a blank certificate of decontamination can be downloaded from the
following web site: www.ksb.com/certificate_of_decontamination
3.5 Disposal
WARNING
Fluids, consumables and supplies posing a health hazard
Hazard to persons and the environment!
▷Collect and dispose of any preservatives, flushing liquids and fluid residues.
▷Wear safety clothing and a protective mask, if required.
▷Observe all legal regulations on the disposal of fluids posing a health hazard.
1. Dismantle the product.
Collect greases and other lubricants during dismantling.
2. Separate and sort the materials, e.g. by:
- Metals
- Plastics
- Electronic waste
- Greases and other lubricants
3. Dispose of materials in accordance with local regulations or in another
controlled manner.

4 Description
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4 Description
4.1 General description
▪KSB quench system
The KSB quench system serves as an auxiliary system for mechanical seals installed in
pump sets and other rotating machinery in accordance with the manufacturer’s
instructions.
4.2 Product information as per Regulation No. 1907/2006(REACH)
For information as per chemicals Regulation (EC) No. 1907/2006 (REACH), see https://
www.ksb.com/ksb-en/About-KSB/Corporate-responsibility/reach/ .
4.3 Designation
Table4: Designation key
Code Description
KWT51 Reservoir design
KWT Quench system to API Plan 51 and 52
F80014 Drawing number of the quench system
4.4 Name plate
2
1
3
4
5
6
7
8
FLUITEN REF.
ITEM
BARRIER FLUID
DESIGN PRESSURE
OPERATING PRESSURE
DESIGN TEMPERATURE
YEAR
bar g
bar g
°C
SERIAL. NUM.
CODE
DRAWING 9
10
Fig.1: Name plate (example)
1 Order-specific serial number 2 Order number of the manufacturer
3 Material number of the KSB quench
system
4 Quench liquid
5 Permissible pressure 6 Working pressure
7 Permissible temperature 8 Drawing number of the
manufacturer
9 ASME VIII Div. 1 10 Year of construction

4 Description
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4.5 Design details
▪KSB quench system
– Quench reservoir
▪Suitable for unpressurised quench liquid/ buffer fluid, operating mode to API
Plan51 and 52
▪Pressure Equipment Directive in accordance with 2014/68/EU
▪Design code to ASME VIII Div. 1 Ed. 2015
4.6 Configuration and function
Design KSB quench systems are auxiliary systems for mechanical seals installed in pump sets
and other rotating machinery. KSB's KWT51 quench system is used when a single
mechanical seal requires a quench on the atmospheric side or a double mechanical
seal requires an unpressurised buffer fluid.
Function The quench system is an auxiliary system for single mechanical seals and double
mechanical seals. Single seals combined with API Plan51 operating mode are used
with a quench liquid. The quench liquid prevents any ice from forming on the
atmospheric side of the single seal or on the atmospheric side of the inboard
mechanical seal. In the case of dissolved salts, crystallisation of the fluid handled is
prevented on the atmospheric side of the single seal. In the operating mode to API
Plan51 and API Plan52 the quench liquid/ buffer fluid prevents the fluid handled
from coming into contact with air. Another function is the absorption of mechanical
seal leakage. The fluid handled is prevented from coming into contact with oxygen
or humidity in the air. In the operating mode to API Plan52 the quench liquid is used
as unpressurised buffer fluid for a double mechanical seal.
1

4 Description
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1÷2 m
a) b)
Fig.2: a) Operating mode to API Plan51
b) Operating mode to API Plan52
5
4 2
1
3
Part
No.
Description Part
No.
Description
1 From the quench reservoir to the seal 4 Flush (F)
2 Quench (Q) 5 Seal chamber
3 Drain (D)
The quench liquid is contained in the reservoir of the KWT51 quench system. A rapid
rise of the quench liquid fill level over a short time, visible in the sight glass of the
quench system's reservoir, indicates possible mechanical seal damage. The reservoir
of the quench system is made of stainless steel 316/L.
For a single seal with operating mode to API Plan51 a single seal with a lip seal is
used. Alternatively, specific throttle bushes suitable for sealing off liquids can be
used.

4 Description
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The quench liquid can be topped up via the cap of the quench system's reservoir,
which is required for compensating any loss caused by leakage. The quench liquid
can also be replaced via this cap. Replacing the quench liquid is recommended when
the fill level in the sight glass of the quench reservoir has exceeded the maximum fill
level. Checking the mechanical seal in addition is recommended.

5 Installation at Site
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5 Installation at Site
5.1 Determining the position of the quench reservoir
NOTE
As a rule, the reservoir should be mounted 0.8m above the mechanical seal.
5.2 Aligning and fastening the quench reservoir
1. Attach the quench reservoir to the stand/bracket using the mounting unit on
the back of the KSB quench system and bolts/nuts.
5.3 Connections to the mechanical seal
1. Install the quench reservoir as close as possible to the mechanical seal.
ðAvoid tight curves, kinks and complicated circuits to reduce passive
resistances and pressure losses in the circuit.
ðLay the piping with a continuously rising slope to prevent air from
accumulating in the piping.
2. Ensure that no shut-off elements are installed in the circuit which could
interrupt the fluid circulation.
5.4 External connections to the KSB quench system
Operating mode to APIPlan51: application for single mechanical seal
▪Threaded connection to the mechanical seal (A)
▪Cap for filling in/ topping up quench liquid
▪Sight glass for checking the fill level
Operating mode to APIPlan52: application for double mechanical seal
▪Threaded connection to the mechanical seal (A)
▪Threaded connection from the mechanical seal to the quench system (B)
▪Cap for filling in/ topping up quench liquid
▪Sight glass for checking the fill level
1. A shut-off valve can be installed underneath the quench reservoir to isolate the
quench system for any maintenance work.

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6 Commissioning/Start-up/Shutdown
6.1 Safety instructions for operation
WARNING
Hot surfaces
Risk of burns!
▷Do not touch the surface of the KSB quench system and associated components.
CAUTION
Placing loads on the quench reservoir
Damage to or failure of the quench system!
Damage to or failure of the mechanical seal!
▷Never place a load > 3kg on the quench reservoir.
6.2 Commissioning/Start-up
6.2.1 Prerequisites for commissioning/start-up
WARNING
Improper assembly / dismantling
Damage to the KSB quench system!
Damage to the mechanical seal!
Fluid handled escaping!
▷Have installation/ dismantling of the KSB quench system carried out by
authorised and qualified personnel only.
CAUTION
Vibrations during operation
Fatigue fracture of the piping!
Fluid handled escaping!
Mechanical seal failure!
▷Carry out a vibration analysis prior to installation. If in doubt, contact the
manufacturer.
Before commissioning/ starting up the KSB quench system, ensure that the following
requirements are met:
▪The KSB quench system has been properly connected mechanically.
▪All auxiliary connections required are connected and operational.
▪After prolonged shutdown of the pump (set), the activities required for returning
the equipment to service have been carried out.

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6.2.2 Selecting the quench liquid/ buffer fluid
DANGER
Contact with toxic, flammable, explosive or hot quench liquid/ barrier fluid
Risk of injury, e.g. chemical burns on the skin and in the eyes, poisoning and burns!
▷Observe the relevant safety instructions, e.g. safety data sheets, for the
handling of hazardous substances (wear safety goggles, protective gloves,
protective clothing, etc. if required).
▷Wear personal protective equipment (e.g. safety goggles, protective gloves,
protective clothing, etc).
▷Collect and properly dispose of the quench liquid/ buffer fluid.
▷Remove any quench liquid/ buffer fluid residues from the KSB quench system
and flush the system thoroughly.
CAUTION
Use of non-approved fluids
Interaction between quench liquid/ buffer fluid and fluid handled!
▷Only use the fluids listed in the order documentation.
▷If in doubt, contact the manufacturer of the fluids.
When selecting the buffer fluid1) observe the following:
▪Additives which inhibit wear and/or oxidation are often found in commercial
turbine oils and can lead to deposits on the seal faces.
▪Use a clean buffer fluid1) not containing any foreign matter.
▪The buffer fluid1) should have flow characteristics which prevent the formation of
deposits or residues.
▪The buffer fluid1) should prevent the formation of ice and keep salts dissolved.
▪The buffer fluid1) should prevent any contact between the fluid handled and
atmosphere or reduce the absorption of humidity by the fluid handled.
▪It should be resistant to ageing.
▪It should be stable at the applicable operating temperature and operating
pressure.
▪Avoid fluids susceptible to evaporation, hardening and foaming.
▪Ensure compatibility with the fluid handled. If the inboard mechanical seal fails,
the two fluids may come into contact with each other.
▪Buffer fluid escaping to1) atmosphere must be acceptable.
Table5: Preferred buffer fluid1)
Buffer fluid1) Function of the buffer
fluid1)
Operating temperature
[°C]
Ethylene glycol Preventing the formation
of ice
-40 to +100
Light oils (viscosity 2 – 3°E
at 50°C)
Absorbing leakage or
lubricating the seal faces
-10 to +120
Water Diluting salts contained in
leakage
10 to 80
Water + ethylene glycol Diluting salts contained in
leakage and preventing the
formation of ice
-20 to 100° C (70 %/30 %)
-35 to 110° C (50 %/50 %)
1Quench liquid/ buffer fluid

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Buffer fluid1) Function of the buffer
fluid1)
Operating temperature
[°C]
Water + propylene glycol Diluting salts contained in
leakage and preventing the
formation of ice
-15 to 100° C (70 %/30 %)
-30 to 110° C (50 %/50 %)
Hydrophobic liquids
(isodecane, perfluorinated
polyether, etc.)
Preventing contact with
atmospheric humidity
-50 to +50
6.2.3 Commissioning/ starting up the KSB quench system with unpressurised
quench liquid/ buffer fluid, operating mode to API Plan51 or API Plan52
WARNING
Improper lifting during installation and maintenance work
Risk of injury!
Damage to the KSB quench system!
▷Select suitable and approved lifting equipment and lifting accessories for the
weight of the KSB quench system.
▷Always attach lifting accessories to the intended fastening points.
▷Ensure the load is properly secured!
▷Move the KSB quench system carefully.
▷Observe the applicable accident prevention regulations.
NOTE
To prevent the mechanical seal from running dry, the pump must be filled with the
fluid handled at operating pressure.
üThe KSB quench system is installed as specified.
üOrder documentation including drawings is available. (ðSection9,Page25)
1. Open the cap located on top of the quench reservoir.
2. Fill the quench system's reservoir with the fluid selected for operation. The fill
level in the sight glass is between the minimum and maximum levels. Compare
related order documentation.
ðOpen the vent valve (if applicable) during the filling process.
ðAfter the filling process is completed, close the vent valve.
3. Close the cap on top of the quench reservoir.
4. Check all piping connections for leakage and remedy if necessary.
5. Prevent any air from being trapped between the quench reservoir and the KSB
mechanical seal.
ðThe KSB quench system is ready for operation.
6.3 Operating limits
Mandatory operating parameters and relevant application limits are clearly specified
in the order documentation, on the name plate and in the associated drawings . Non-
compliance with the application limits shall void the KSB quench system’s warranty.
1. All application limits must be observed; consult the manufacturer if necessary.
2. Final inspection documents must be stored carefully.
3. The operator must ensure that pressure and temperature limits are observed.
4. Never use the quench “in vacuum”.

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Table6: Application limits of the KSB quench system
Characteristic Unit Limit
Permissible pressure [bar g] Unpressurised
Permissible temperature [°C] -40 to +120
Capacity [l] 3,00
In addition, the Pressure Equipment Directive 2014/68/EU applies with the following
categories:
Table7: Categories according to Pressure Equipment Directive 2014/68/EU
Page Fluid state Fluid group Table Risk category Pressure
equipment
module
Shell side G+L 1 1 Art.4 Sect.3
6.4 Shutdown/storage/preservation
6.4.1 Measures for dismantling
WARNING
Fluids handled, consumables and supplies which are hot and/or pose a health
hazard
Hazard to persons and the environment!
▷Collect and properly dispose of flushing fluid and any residues of the fluid
handled.
▷Wear safety clothing and a protective mask if required.
▷Observe all legal regulations on the disposal of fluids posing a health hazard.
WARNING
Improper assembly / dismantling
Damage to the KSB quench system!
Damage to the mechanical seal!
Fluid handled escaping!
▷Have installation/ dismantling of the KSB quench system carried out by
authorised and qualified personnel only.
üThe pump set has been shut down in accordance with the operating manual.
üThe fluid in the quench reservoir has cooled down.
üA suitable container for collecting the fluid from the quench reservoir is
available.
1. Connect the connecting line to the "DRAIN" connection2) and guide it to the
drain pan.
2. Open the drain unit (e.g. ball valve)2).
3. Flush the KSB quench system with a suitable liquid.
4. Properly dispose of the fluids collected.
5. Close the drain unit2) to prevent the escape of residual liquid or the ingress of
dirt.
6. Dismantle the piping.
7. Remove the KSB quench from the system.
2If any

6 Commissioning/Start-up/Shutdown
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6.4.2 Measures to be taken for shutdown
For a shutdown, ensure the measures for dismantling are properly implemented.
▪For a short-term shutdown (1 to 2months) the buffer fluid remains in the system.
▪For a longer shutdown drain the buffer fluid and preserve the quench reservoir.
6.4.3 Returning to service
WARNING
Failure to re-install or re-activate protective devices
Risk of injury from moving parts or escaping fluid!
▷As soon as the work is completed, properly re-install and re-activate any safety-
relevant devices and protective devices.
Before returning the KSB quench system to service, implement the following
measures:
1. Observe and take all measures required to return the pump sets to service (see
operating manual of the pump set).
2. For returning the equipment to service observe the sections on commissioning/
start-up .