Amarex KRT series User manual

Submersible Motor Pump
Amarex KRT
Sizes DN 200 to DN 700; 60 Hz
6 poles: 530 6_N to 850 6_N
8 poles: 460 8_N to 760 8_N
10 poles: 390 10_N to 660 10_N
12 poles: 340 12_N to 560 12_N
Installation/Operating Manual
Mat. No.: 01463269

Legal information/Copyright
Installation/Operating Manual Amarex KRT
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 9/7/2018

Contents
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Amarex KRT
Contents
Glossary .................................................................................................................................................. 5
1 General.................................................................................................................................................... 6
1.1 Principles ...........................................................................................................................................................6
1.2 Target group.....................................................................................................................................................6
1.3 Other applicable documents............................................................................................................................6
1.4 Symbols .............................................................................................................................................................7
1.5 Key to safety symbols/markings.......................................................................................................................7
2 Safety...................................................................................................................................................... 8
2.1 General..............................................................................................................................................................8
2.2 Intended use .....................................................................................................................................................8
2.2.1 Prevention of foreseeable misuse.......................................................................................................9
2.3 Personnel qualification and personnel training.............................................................................................9
2.4 Consequences and risks caused by non-compliance with these operating instructions ..............................9
2.5 Safety awareness ..............................................................................................................................................9
2.6 Safety information for the operator/user.......................................................................................................9
2.7 Safety information for maintenance, inspection and installation ..............................................................10
2.8 Unauthorized modes of operation................................................................................................................10
2.9 Information for use in Class I, Division 2, Hazardous (Classified) Locations ...............................................10
3 Transport/Temporary Storage/Disposal............................................................................................. 12
3.1 Checking the condition upon delivery..........................................................................................................12
3.2 Transport.........................................................................................................................................................12
3.2.1 Placing the pump set down...............................................................................................................13
3.2.2 Placing the pump set in a vertical position ......................................................................................14
3.3 Storage/preservation......................................................................................................................................14
3.4 Return to supplier...........................................................................................................................................15
3.5 Disposal ...........................................................................................................................................................16
4 Description of the Pump (Set)............................................................................................................. 17
4.1 General description ........................................................................................................................................17
4.2 Designation.....................................................................................................................................................17
4.3 Name plate......................................................................................................................................................18
4.4 Design details..................................................................................................................................................18
4.5 Types of installation .......................................................................................................................................19
4.6 Configuration and function...........................................................................................................................19
4.7 Noise characteristics (for dry installation only - installation type D)...........................................................20
4.8 Scope of supply...............................................................................................................................................20
4.9 Dimensions and weights ................................................................................................................................20
5 Installation at Site................................................................................................................................ 21
5.1 Safety regulations...........................................................................................................................................21
5.2 Checks to be carried out prior to installation...............................................................................................21
5.2.1 Checking the operating data ............................................................................................................21
5.2.2 Preparing the place of installation ...................................................................................................22
5.2.3 Removing the transport lock.............................................................................................................22
5.2.4 Checking the lubricant level (installation type S) ............................................................................22
5.2.5 Checking the coolant level (installation types K and D)..................................................................24
5.2.6 Checking the direction of rotation ...................................................................................................24
5.3 Installing the pump set ..................................................................................................................................25
5.3.1 Stationary wet installation................................................................................................................26
5.3.2 Stationary dry installation.................................................................................................................34
5.4 Electrical system..............................................................................................................................................39
5.4.1 Information for planning the control system ..................................................................................39
5.4.2 Electrical connection..........................................................................................................................44

Contents
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6 Commissioning/Start-up/Shutdown................................................................................................... 47
6.1 Commissioning/start-up .................................................................................................................................47
6.1.1 Prerequisites for commissioning/start-up .........................................................................................47
6.1.2 Priming and venting the pump set (dry installation only - installation type D) ............................47
6.1.3 Start-up...............................................................................................................................................48
6.1.4 Shutdown (dry installation only - installation type D) ....................................................................49
6.2 Operating limits..............................................................................................................................................50
6.2.1 Frequency of starts.............................................................................................................................50
6.2.2 Operation on the power supply network ........................................................................................50
6.2.3 Operation on a frequency inverter...................................................................................................50
6.2.4 Fluid handled .....................................................................................................................................51
6.3 Shutdown/storage/preservation ....................................................................................................................52
6.3.1 Measures to be taken for shutdown ................................................................................................52
6.4 Returning to service .......................................................................................................................................53
7 Servicing/Maintenance........................................................................................................................ 54
7.1 Safety regulations...........................................................................................................................................54
7.2 Maintenance/inspection.................................................................................................................................56
7.2.1 Inspection work..................................................................................................................................56
7.2.2 Coolant (pump sets with cooling system only - installation types D and K) ..................................61
7.2.3 Lubrication and lubricant change.....................................................................................................65
7.3 Drainage/cleaning ..........................................................................................................................................72
7.4 Dismantling the pump set..............................................................................................................................72
7.4.1 General information/Safety regulations...........................................................................................72
7.4.2 Preparing the pump set.....................................................................................................................73
7.4.3 Dismantling the pump section ..........................................................................................................73
7.4.4 Dismantling the motor section .........................................................................................................78
7.5 Reassembling the pump set...........................................................................................................................79
7.5.1 General information/Safety regulations...........................................................................................79
7.5.2 Reassembling the pump section .......................................................................................................80
7.5.3 Reassembling the motor section.......................................................................................................83
7.5.4 Leak testing........................................................................................................................................86
7.5.5 Checking the connection of motor/power supply ...........................................................................88
7.6 Tightening torques.........................................................................................................................................88
7.7 Spare parts stock.............................................................................................................................................88
7.7.1 Ordering spare parts..........................................................................................................................88
7.7.2 Recommended spare parts stock for 2 years' operation to DIN 24296 ..........................................89
8 Trouble-shooting.................................................................................................................................. 90
9 Related Documents.............................................................................................................................. 92
9.1 General assembly drawings with list of components...................................................................................92
9.1.1 Pump sets with cooling system (installation types K and D) ...........................................................92
9.1.2 Pump sets without cooling system (installation type S) ..................................................................94
9.2 Detailed views.................................................................................................................................................96
9.2.1 Side views ...........................................................................................................................................96
9.2.2 Top views............................................................................................................................................98
9.2.3 Attachment points...........................................................................................................................100
9.2.4 Sensors and terminals......................................................................................................................102
9.2.5 Drive-end bearing assembly............................................................................................................106
9.2.6 Further details..................................................................................................................................106
9.3 Wiring diagrams ...........................................................................................................................................108
9.3.1 Wiring diagram for the power cables ............................................................................................108
9.3.2 Wiring diagram for the sensors ......................................................................................................109
9.4 Sectional drawings of the mechanical seal.................................................................................................116
10 Certificate of Decontamination......................................................................................................... 118
Index ................................................................................................................................................... 119

Glossary
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Amarex KRT
Glossary
Back pull-out unit
Pump without pump casing; partly completed
machinery
Certificate of decontamination
If a product is to be returned to the manufacturer,
the customer declares in a certificate of
decontamination that the product has been
properly drained to eliminate any environmental
and health hazards arising from components in
contact with the fluid handled.
Close-coupled design
Motor directly fitted to the pump via a flange or a
drive lantern
Discharge line
The pipeline which is connected to the discharge
nozzle
Hydraulic system
The part of the pump in which the kinetic energy
is converted into pressure energy
Pump set
Complete pump set consisting of pump, drive,
additional components and accessories
Suction lift line/suction head line
The pipeline which is connected to the suction
nozzle

1 General
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1 General
1.1 Principles
This operating manual is supplied as an integral part of the type series and variant
indicated on the front cover (for details, please refer to the table below).
Table1: Variants covered by this manual
Size Impeller type Material variant
Gray cast iron Industrial materials
G G1 G2 GH H C1 C2
200-631 K K K - - - - -
250-630 K K K - - - - -
250-632 K K K - - - - -
250-900 K K K - - - - -
350-632 K K K - - - - -
350-633 K K K - - - - -
350-636 K K K - - - - -
350-710 K K K - - - - -
350-713 K K K - - - - -
400-900 K K K - - - - -
401-710 K K K - - - - -
401-713 K K K - - - - -
500-632 K K K - - - - -
500-634 K K K - - - - -
500-640 K K K - - - - -
501-710 K K K - - - - -
501-900 K K K - - - - -
600-710 K K K - - - - -
700-901 K K K - - - - -
700-902 K K K - - - - -
The manual describes the proper and safe use of this equipment in all phases of
operation.
The name plate indicates the type series and size, the main operating data, the order
number and the order item number. The order number and order item number
clearly identify the pump set and serve as identification for all further business
processes.
In the event of damage, immediately contact your nearest KSB Service center to
maintain the right to claim under warranty.
1.2 Target group
This supplementary operating manual is aimed at the target group of trained and
qualified specialist technical personnel.
1.3 Other applicable documents
Table2: Overview of other applicable documents
Document Contents
Data sheet Technical data of the pump set
General arrangement drawing/
outline drawing
Mating dimensions, installation dimensions
and weights of the pump set
Hydraulic characteristic curve Characteristic curves showing head, flow rate,
efficiency and power input

1 General
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Document Contents
General assembly drawing1) Sectional drawing of the pump set with part
numbers
Sub-supplier product literature1) Operating manuals and other product
literature describing accessories and
integrated machinery components
Spare parts lists1) Description of spare parts
Supplementary operating manual1) E.g. for special accessories
For accessories and/or integrated machinery components observe the product
literature of the corresponding manufacturer.
1.4 Symbols
Table3: 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
1.5 Key to safety symbols/markings
Table4: 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.
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.
1) If agreed to be included in the scope of supply

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.
The safety information in all sections of this manual must be complied with.
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 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:
▪Arrow indicating the direction of rotation
▪Markings for connections
▪Name plate
The operator is responsible for ensuring compliance with all local regulations which
are not taken into account.
2.2 Intended use
▪The pump set must only be operated within the operating limits described in the
other applicable documents.
▪Only operate pump sets which are in perfect technical condition.
▪Do not operate partially assembled pump sets.
▪Only use the pump set to handle the fluids described in the data sheet or product
literature of the pump variant.
▪Never operate the pump set without the fluid to be handled.
▪Observe the limits for continuous duty specified in the data sheet or product
literature (Qmin and Qmax) (to prevent damage such as shaft fracture, bearing
failure, mechanical seal damage, etc).
▪When untreated waste water is handled, the duty points in continuous operation
lie within 0.7 to 1.2×Qoptto minimize the risk of clogging/hardening.
▪Avoid duty points for continuous operation at very low speeds and small flow
rates (<0.7xQopt).
▪Observe the minimum flow rates and maximum flow rates indicated in the data
sheet or product literature (to prevent overheating, mechanical seal damage,
cavitation damage, bearing damage, etc).
▪Do not throttle the flow rate on the suction side of the pump set (to prevent
cavitation damage).
▪Consult the manufacturer about any use or mode of operation not described in
the data sheet or product literature.
▪Only use this pump for the fluids described below.
Closed multi-channel impeller
(impeller type K/K-max)

2 Safety
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Amarex KRT
2.2.1 Prevention of foreseeable misuse
▪Observe the minimum flow velocities required to fully open the swing check
valves to prevent the reduction of pressure and risk of clogging.
(Contact the manufacturer for the required minimum flow velocities/loss
coefficients.)
▪Never exceed the permissible operating limits and use limits specified in the data
sheet or product literature regarding pressure, temperature, etc.
▪Observe all safety information and instructions in this manual.
2.3 Personnel qualification and personnel training
All personnel involved must be fully qualified to transport, install, operate, maintain
and inspect the machinery 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 sufficiently trained specialist personnel
training and instructing the personnel who will carry out the respective tasks. If
required, the operator can commission the manufacturer/supplier to train the
personnel.
Training on the pump (set) must always be supervised by technical specialist
personnel.
2.4 Consequences and risks caused by non-compliance with these operating
instructions
▪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
– Hazard to the environment due to leakage of hazardous substances
2.5 Safety awareness
In addition to the safety information contained in this 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 information 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.

2 Safety
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▪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.)
▪If shutting down the pump does not increase potential risk, fit an emergency
stop control device in the immediate vicinity of the pump (set) during pump set
installation.
2.7 Safety information for maintenance, inspection and installation
▪Modifications or alterations of the pump (set) are only permitted with the
manufacturer's prior consent.
▪Use only original spare parts or parts/components authorized 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 is performed
by authorized, qualified specialist personnel who are thoroughly familiar with
the manual.
▪Only carry out work on the pump (set) during standstill of the pump.
▪Only perform work on the pump set when it has been disconnected from the
power supply (de-energized).
▪The pump (set) must have cooled down to ambient temperature.
▪Pump pressure must have been released and the pump must have been drained.
▪When taking the pump set out of service always adhere to the procedure
described in the manual. (ðSection6.3,Page52)
▪Decontaminate pumps 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6.1,Page47)
2.8 Unauthorized modes of operation
Never operate the pump (set) outside the limits stated in the data sheet and in this
manual.
The warranty relating to the operating reliability and safety of the pump (set)
supplied is only valid if the equipment is used in accordance with its intended use.
2.9 Information for use in Class I, Division 2, Hazardous (Classified)
Locations
Only certified pump sets with FM-approved nonincendive submersible motors, with
name plates marked accordingly, may be used in Class I, Division 2, Hazardous
(Classified) Locations.
Special conditions apply to the operation of nonincendive pump sets:
▪The explosion–proof status of the pump set is only assured if the pump set is used
in accordance with its designated use.
▪The limits stated in the data sheet and on the name plate must not be exceeded
under any circumstances.
▪Correct monitoring of the motor temperature is imperative to ensure explosion
protection.
▪Observe the wiring diagrams.
▪Never operate a nonincendive pump set without temperature monitoring.
▪Repairs or modifications of the pump set can affect explosion protection and
may, therefore, only be made by the manufacturer or a repair shop certified by
FM Approvals.

2 Safety
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Amarex KRT
▪Certified repair shops need to be audited by FMApprovals and need to have a
copy of drawings as well as other rules and regulations to follow.
▪Modifications always require the manufacturer's approval.
▪Only original spare parts and accessories authorized by the manufacturer must be
used for nonincendive pump sets.

3 Transport/Temporary Storage/Disposal
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3 Transport/Temporary 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 distributor and the insurance company about the damage in
writing immediately.
3.2 Transport
DANGER
Improper transport
Danger to life from falling parts!
Damage to the pump set!
▷Attach any lifting accessories to the attachment point (pump handle) provided.
▷Use the eyebolts for vertical loads only. For lateral loads the eyebolts must be
replaced by permissible lifting tackle for this direction of load.
▷Never suspend the pump set by its power cable.
▷Use the supplied lifting chain/rope exclusively to lower the pump set into or
pull it out of the pump sump.
▷Securely attach the lifting rope/chain to the pump and crane.
▷Use tested, marked and approved lifting accessories only.
▷Observe the regional transport regulations.
▷Observe the documentation of the lifting accessory manufacturer.
▷The load-carrying capacity of the lifting accessories must exceed the weight
indicated on the name plate of the pump set to be lifted. Take into account any
additional system components to be lifted.
WARNING
Improper placing of pump sets in a vertical/horizontal position
Personal injury and damage to property!
▷Use appropriate means to secure the pump set against tilting or tipping over.
▷Use two sets of lifting equipment when handling large pump sets if possible
(using the attachment point provided on the motor and the discharge nozzle).
▷Secure power cables against falling down.
▷Use additional supports for the transport holder to secure it against tilting.
▷Maintain adequate safety distance during lifting operations.
WARNING
Improper lifting/moving of heavy assemblies or components
Personal injury and damage to property!
▷Use suitable transport devices, lifting equipment and lifting tackle to move
heavy assemblies or components.

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Amarex KRT
WARNING
Incorrect handling of the power cable
Personal injury and damage to property!
▷Secure power cables against falling down.
▷Avoid power cables being laid on surfaces without fastening.
▷When moving the pump set keep at a safe distance to the power cables.
To transport the pump set suspend it from the lifting tackle as shown.
Fig.1: Transporting the pump set with lifting accessories
3.2.1 Placing the pump set down
WARNING
Placing the pump set on unsecured and uneven surfaces
Personal injury and damage to property!
▷Always place the pump set on a solid and level surface with the pump set in a
vertical position and the motor on top.
▷Only place the pump set on a surface of sufficient load-carrying capacity.
▷Use appropriate means to secure the pump set against tilting or tipping over.
It may be necessary to place the pump set down in a horizontal position during
maintenance or installation.
Pump sets with cooling system (installation types D and K)
CAUTION
Improper transport / Improper positioning of pump sets with cooling system
Damage to the cooling system!
▷Never place the pump set on the cooling jacket or fasten it by the cooling
system.
Pump sets equipped with a cooling system are delivered with a support foot as a
transport lock.

3 Transport/Temporary Storage/Disposal
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1
2
2
Fig.2: Placing down a pump set with a support foot
1 Support foot 2 Wooden support
For placing down the pump set observe the following:
▪Support foot (1)
– Fit the support foot (1) of the pump prior to placing the pump set down in a
horizontal position.
– Place the pump set down on the support foot (1) and the pump casing.
▪Wooden support (2)
– Use wooden supports (2) to prevent any damage to the coating of the pump
set.
Pump sets without cooling system (installation type S)
For placing down the pump set observe the following:
▪Place the pump set on the pump casing and directly on the edge of the motor
housing cover.
▪Use wooden supports to prevent any damage to the coating of the pump set.
NOTE
The support foot can also be used for placing down the pump set. Place the pump
set down as described for pump sets with cooling system (installation types D and
K).
3.2.2 Placing the pump set in a vertical position
To change the pump from a horizontal to a vertical position, attach lifting
equipment to the attachment point provided.
When the pump is pulled upright, the pump casing will act as a pivot. Place wooden
supports under the pivot points.
Pumps of installation types S and K with a nominal discharge nozzle diameter of
DN150 and above have a threaded hole in the claw. If two cranes are available, a
swivel eyebolt can be screwed into the claw to pull the pump set upright. The
direction of pull of the swivel eyebolt at an angle of 90° to the bolt axis should be
approved for the entire pump set weight.
3.3 Storage/preservation
If commissioning is to take place some time after delivery, we recommend that the
following measures be taken for pump set storage:

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CAUTION
Improper storage
Damage to the power cables!
▷Support the power cables at the cable entry to prevent permanent
deformation.
▷Only remove the protective caps from the power cables at the time of
installation.
CAUTION
Damage during storage due to humidity, dirt or vermin
Corrosion/contamination of the pump (set)!
▷For outdoor storage cover the pump (set) or the packaged pump (set) and
accessories with waterproof material.
CAUTION
Wet, contaminated or damaged openings and connections
Leakage or damage to the pump!
▷Clean and cover pump openings and connections as required prior to putting
the pump into storage.
Table5: Ambient conditions for storage
Ambient condition Value
Relative humidity 5% to 85%
(non-condensing)
Ambient temperature -4°F to 158°F [-20°C to +70°C]
▪Store the pump set under dry and vibration-free conditions, if possible in its
original packaging.
1. Spray-coat the inside wall of the pump casing, and in particular the impeller
clearance areas, with a preservative.
2. Spray the preservative through the suction and discharge nozzles.
It is advisable to then close the pump nozzles (e.g. with plastic caps or similar).
NOTE
Observe the manufacturer's instructions for application/removal of the preservative.
3. Rotate the impeller by hand once every three months.
3.4 Return to supplier
1. Drain the pump as per operating instructions. (ðSection7.3,Page72)
2. Flush and clean the pump, particularly if it has been used for handling noxious,
explosive, hot or other hazardous fluids.
3. If the pump has handled fluids whose residues could lead to corrosion damage
in the presence of atmospheric humidity or could ignite upon contact with
oxygen, the pump must also be neutralized, and anhydrous inert gas must be
blown through the pump to ensure drying.
4. Always complete and enclose a certificate of decontamination when returning
the pump.
Always indicate any safety measures and decontamination measures taken.
(ðSection10,Page118)

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NOTE
If required, a blank certificate of decontamination can be downloaded from the
KSB web site at: www.ksb.com/certificate_of_decontamination
3.5 Disposal
WARNING
Fluids handled, consumables and operating supplies which are hot or pose a health
hazard
Hazard to persons and the environment!
▷Collect and properly dispose of the flushing fluid and of 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.
1. Dismantle the pump (set).
Collect greases and other lubricants during dismantling.
2. Separate and sort the pump 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 of the Pump (Set)
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4 Description of the Pump (Set)
4.1 General description
Pump for handling untreated waste water containing long fibers and solid
substances, liquids containing air/gas, and raw sludge, activated sludge and digested
sludge.
4.2 Designation
Example: Amarex KRT K 401-710 / 690 6 UN G-S IE3
Table6: Designation key
Code Description
Amarex KRT Type series
K Impeller type
K Closed multi-channel impeller
401 Nominal discharge nozzle diameter [mm]
710 Maximum nominal impeller diameter [mm]
690 Motor size
6 Number of motor poles
UN Motor version
UN Non-explosion-proof, for fluid temperatures of up to
40°C
G Material variant
G Standard variant, gray cast iron
G1 Like G with impeller made of duplex stainless steel
S Installation type
S Stationary wet installation with guide cable arrangement
or guide rail arrangement (without cooling jacket)
D Stationary dry installation, vertical
K Stationary wet installation with guide cable arrangement
or guide rail arrangement (with cooling jacket)
IE3 Motor efficiency classification2)
3) No efficiency classification
IE3 Premium Efficiency
2) IEC60034-30 standard not binding for submersible motor pumps. Efficiencies calculated/determined according to the
measurement method specified in IEC60034-2. The marking is used for submersible motors that achieve efficiency levels
similar to those of standardized motors acc. to the IEC60034-30 standard.
3) Blank

4 Description of the Pump (Set)
18 of 124 Amarex KRT
4.3 Name plate
TYPE
No.
Q
P2
Mat. No: 01100815 ZN 3826 - M 26
TEMP. MAX.
WARNING - DO NOT OPEN WHEN ENERGIZED
THERMALLY PROTECTED
a) b)
°F lbs
H
Motor IP 68 SUBM. MAX. 100FT CLASS H
3~ M.-No.
HP VHz PF
RPM FLA LRA SF 1.15
TYPE
No.
Q
P2
Mat. No: 01080568 ZN 3826 - M 18
TEMP. MAX.
WARNING - DO NOT OPEN WHEN ENERGIZED
THERMALLY PROTECTED
MADE IN GERMANY
°F lbs
H
Motor IP 68 SUBM. MAX. 100FT CLASS H
3~ M.-No.
HP VHz PF
RPM FLA LRA SF
FM CLASS I, DIV. 2 GROUPS A, B, C&D T3
MADE IN GERMANY
APPROVED
1
2
3
10
12
5
4
6
7
8
9
14
15
16
13
17
18
19
21
20
11
KRTK 401 - 710 / 690 6 UNG-S
9971235943/000100
104 17000
K40KN12-800K
510
595 725 275
0.94
460 60
123456
KRTK 401 - 710 / 690 6 UNG-S
99971235943/000100
104 17000
K40KN12-800K
300
1695 725 275
0.94
460 60
123456
32100 GPM 66 FT
1.15
2018 2018
32100 GPM 66 FT
12345678910-ABCDE 12345678910-ABCDE
Johann-Klein-Straße 9
Deutschland
67227 Frankenthal
KSB SE & Co. KGaA
Johann-Klein-Straße 9
Deutschland
67227 Frankenthal
KSB SE & Co. KGaA
Fig.3: Name plate (example) a) Standard pump set, b) Nonincendive pump set for use in Class I, Division 2,
Hazardous (Classified) Locations
1 Designation 2 KSB order number
3 Flow rate 4 Maximum fluid and ambient temperature
5 Enclosure 6 Motor type
7 Rated power 8 Rated speed
9 Rated voltage 10 Rated current
11 Head 12 Year of construction
13 Total weight 14 Maximum submergence
15 Thermal class of winding insulation 16 Motor number
17 Power factor at rated operating point 18 Rated frequency
19 Service factor 20 Starting current
21 Explosion protection marking
4.4 Design details
Design
▪Fully floodable submersible motor pump
▪Not self-priming
▪Close-coupled design
Impeller type
▪Application-oriented impeller type
Shaft seal
▪Two bi-directional mechanical seals in tandem arrangement, with liquid reservoir
▪Leakage chamber
Bearings
Drive end:
▪Grease-packed bearings sealed for life
▪Maintenance-free
Pump end:
▪Can be re-lubricated
Drive
▪Three-phase asynchronous squirrel-cage motor

4 Description of the Pump (Set)
19 of 124
Amarex KRT
4.5 Types of installation
Three design variants are available, depending on the installation type:
▪Installation type D
Stationary dry installation with cooling system
▪Installation type K
Stationary wet installation with cooling system
▪Installation type S
Stationary wet installation without cooling system
Pump sets of installation type S
are designed for continuously submerged operation. The motor is cooled by the
pumped fluid on the motor surface. Operation with the motor outside the fluid
handled is possible for short periods.
Pump sets of installation types D and K
are suitable for continuous operation with the motor outside the fluid. The motor is
cooled by the integrated cooling system.
4.6 Configuration and function
1
6
32
7
8
9
10
4
5
Fig.4: Sectional drawing
1 Casing wear ring 2 Discharge nozzle
3 Discharge cover 4 Shaft
5 Bearing bracket 6 Suction nozzle
7 Impeller 8 Shaft seal
9 Bearing, pump-end 10 Bearing, motor-end
Design The pump is designed with an axial fluid inlet and a radial outlet. The hydraulic
system sits on the extended motor shaft. The shaft runs in common bearings.

4 Description of the Pump (Set)
20 of 124 Amarex KRT
Function The fluid enters the pump axially via the suction nozzle (6) and is accelerated
outward by the rotating impeller (7). In the flow passage of the pump casing the
kinetic energy of the fluid is converted into pressure energy. The fluid is pumped to
the discharge nozzle (2), where it leaves the pump. The casing wear ring (1) prevents
any fluid from flowing back from the casing into the suction nozzle. At the rear side
of the impeller, the shaft (4) enters the casing via the discharge cover (3). The shaft
passage through the cover is sealed to atmosphere with a shaft seal (8). The shaft
runs in rolling element bearings (9 and 10), which are supported by a bearing bracket
(5) connected to the pump casing and/or discharge cover.
Sealing The pump is sealed by two bi-directional mechanical seals in tandem arrangement.
A lubricant chamber in-between the seals ensures cooling and lubrication of the
mechanical seals.
Cooling system Pump sets of installation types K and D feature an integrated motor cooling system.
The heat generated by the motor is transferred via the discharge cover to the fluid
handled by internal circulation. The coolant serves as anti-corrosive and antifreeze
agent, and as a lubricant for the mechanical seals.
4.7 Noise characteristics (for dry installation only - installation type D)
The surface sound pressure level LpA
4) equals 85dB max.
4.8 Scope of supply
A separate name plate is included in KSB's scope of supply. Attach this name plate in
a clearly visible position outside the place of installation, e.g. at the control panel,
pipeline or mounting bracket.
Depending on the model, the following items are included in the scope of supply:
Stationary wet installation (installation types K and S)
▪Pump set complete with connection cables
▪Claw with sealing elements and mounting elements
▪Lifting rope, lifting chain or lifting bail (optional)
▪Mounting bracket with mounting elements
▪Base elbow with inspection hole5) and fastening elements
▪Guide cable/ guide rail
(guide rails are not included in KSB's scope of supply)
Stationary dry installation (installation type D)
▪Pump set complete with connection cables
▪Base elbow with inspection hole6) and fastening elements
▪Optional: intake elbow with inspection hole
4.9 Dimensions and weights
For dimensions and weights refer to the general arrangement drawing/outline
drawing or data sheet of the pump set.
4) Surface sound pressure level to ISO3744
5) For nominal discharge nozzle diameter ≥DN100
6) For nominal discharge nozzle diameter ≥DN100