KSB Amarex KRT Installation instructions

Submersible Motor Pump
Amarex KRT
Pump Sizes DN 40 to DN 300
Motor Sizes:
2-pole: 5 2 to 55 2
4-pole: 4 4 to 65 4
6-pole: 4 6 to 50 6
8-pole: 10 8 to 35 8
Installation/Operating
Manual
Ident. number: 01 196 129

Legal information/Copyright
Installation/Operating Manual Amarex KRT
Original operating manual
KSB Aktiengesellschaft Pegnitz
All rights reserved. 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 KSB´s express written consent.
Subject to technical modification without prior notice.
© KSB Aktiengesellschaft Frankenthal 01.09.2010

Contents
Glossary ................................................................................................ 5
1 General ................................................................................................ 6
1.1 Principles .......................................................................................................... 6
1.2 Installation of partly completed machinery .................................................. 6
1.3 Target group ................................................................................................... 6
1.4 Other applicable documents .......................................................................... 7
1.5 Symbols ............................................................................................................ 7
2 Safety ................................................................................................... 8
2.1 Key to safety symbols/markings ..................................................................... 8
2.2 General ............................................................................................................ 8
2.3 Intended use .................................................................................................... 8
2.4 Personnel qualification and training ........................................................... 10
2.5 Consequences and risks caused by non-compliance with these operating
instructions .................................................................................................... 10
2.6 Safety awareness ........................................................................................... 10
2.7 Safety information for the operator/user .................................................... 10
2.8 Safety information for maintenance, inspection and installation work ... 11
2.9 Unauthorised modes of operation ............................................................... 11
2.10 Explosion protection ..................................................................................... 11
3 Transport/Temporary Storage/Disposal ........................................... 13
3.1 Transport ....................................................................................................... 13
3.2 Storage/Preservation ..................................................................................... 14
3.3 Return to supplier ......................................................................................... 14
3.4 Disposal .......................................................................................................... 15
4 Description of the Pump (Set) .......................................................... 16
4.1 General description ....................................................................................... 16
4.2 Designation ................................................................................................... 16
4.3 Name plate .................................................................................................... 16
4.4 Design details ................................................................................................ 16
4.5 Types of installation ...................................................................................... 17
4.6 Configuration and function ......................................................................... 18
4.7 Scope of supply ............................................................................................. 18
4.8 Dimensions and weights ............................................................................... 19
5 Installation at Site ............................................................................. 20
5.1 Safety regulations ......................................................................................... 20
5.2 Checks to be carried out prior to installation ............................................. 20
5.3 Installing the pump set ................................................................................. 22
5.4 Electrical connection ..................................................................................... 28
Contents
Amarex KRT 3 of 78

6 Commissioning/Start-up/Shutdown ................................................. 34
6.1 Commissioning/start-up ................................................................................ 34
6.2 Operating limits ............................................................................................ 34
6.3 Shutdown/storage/preservation ................................................................... 37
6.4 Returning to service ...................................................................................... 37
7 Servicing/Maintenance ...................................................................... 39
7.1 Safety regulations ......................................................................................... 39
7.2 Servicing/inspection ...................................................................................... 40
7.3 Drainage/disposal .......................................................................................... 45
7.4 Dismantling the pump set ............................................................................ 45
7.5 Reassembling the pump set .......................................................................... 49
7.6 Tightening torques ....................................................................................... 54
7.7 Spare parts stock ........................................................................................... 55
8 Trouble-shooting ............................................................................... 56
9 Related Documents ........................................................................... 57
9.1 General assembly drawings .......................................................................... 57
9.2 Wiring diagrams ............................................................................................ 70
9.3 Flamepaths of explosion-proof motors ....................................................... 71
9.4 Sectional drawings of the mechanical seal .................................................. 72
10 EC Declaration of Conformity .......................................................... 74
11 Certificate of Decontamination ....................................................... 75
Index .................................................................................................. 76
Contents
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Glossary
Back pull-out unit
Pump without pump casing; partly completed
machinery
Certificate of decontamination
A certificate of decontamination certifies that
the pump (set) 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
Hydraulic system
The part of the pump in which the kinetic
energy is converted into pressure energy
Glossary
Amarex KRT 5 of 78

1 General
1.1 Principles
This manual is supplied as an integral part of the type series and variants indicated
on the front cover (for details, please refer to the table below).
Table 1: Variants covered by this manual
Sizes Impeller types Material variant
Grey cast iron Industrial materials
G G1 G2 GH H C1 C2
40-250 F, K, S F, K, S F,K F F, K F, K F, K F, K
80-250 E, F E, F F F F F F F
80-251 F, K F, K K - K K K K
80-315 D D D - - - - -
80-316 F F F F F F - -
100-240 F F F F F F F F
100-250 E, F, K E, F, K F, K F F, K F, K F, K F, K
100-251 D D D - - - - -
100-315 D, E, F, K D, E, F, K D, F, K F F, K F, K F, K F, K
100-316 D D D - - - - -
100-400 K K - - - - - -
100-401 E, F, K E, F, K F, K F F, K F, K F, K F, K
150-251 D D D - - - - -
150-315 D, E, F, K D, E, F, K D, F, K F F, K F, K F, K F, K
150-400 D, K D, K D - - - - -
150-401 D, E, F, K D, E, F, K D, F, K F F,K F, K F, K F, K
151-401 K K K - K K K K
200-315 D, K D,K D, K - K K K K
200-316 K K K - K K K K
200-330 K K K - K K K K
200-400 D, K D, K D - - - - -
200-401 E, K E, K K - K K K K
250-400 D, K D,K D, K - K K K K
250-401 K K K - K K K K
300-400 D, K D, K D, K - K K K K
300-401 K K K - K 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 centre to
maintain the right to claim under warranty.
1.2 Installation of partly completed machinery
To install partly completed machinery supplied by KSB, refer to the sub-sections
under Servicing/Maintenance.
1.3 Target group
This manual is aimed at the target group of trained and qualified specialist technical
personnel. (⇨ Section 2.4 Page 10)
1 General
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1.4 Other applicable documents
Table 2: Overview of other applicable documents
Document Contents
Data sheet Description of the technical data of the pump
set
General arrangement drawing/
outline drawing
Description of mating and installation
dimensions for the pump set
Hydraulic characteristic curve Characteristic curves showing head, flow rate,
efficiency and power input
General assembly drawing1) Sectional drawing of the pump set
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 manuals1) For example for special accessories
1.5 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) If agreed to be included in the scope of supply
1 General
Amarex KRT 7 of 78

2 Safety
All the information contained in this section refers to hazardous situations.
2.1 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.
Explosion protection
This symbol identifies information about avoiding explosions in
potentially explosive atmospheres in accordance with EC Directive
94/9/EC (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.
2.2 General
This manual contains general installation, operating and maintenance instructions
that must be observed to ensure safe pump operation and prevent personal injury
and damage to property.
The safety information in all sections of this manual must be complied with.
This manual must be read and completely understood by the responsible specialist
personnel/operators prior to installation and commissioning.
The contents of this manual must be available to the specialist personnel at the site
at all times.
Information attached directly to the pump must always be complied with and be
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 in this manual.
2.3 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.
!DANGER
2 Safety
8 of 78 Amarex KRT

▪Only use the pump set to handle the fluids described in the data sheet or product
literature of the pump model.
▪Never operate the pump set without the fluid to be handled.
▪Observe the limits for continuous operation specified in the data sheet or
product literature (Qmin2) and Qmax3) ) (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 x Qopt4) to minimise the risk of clogging/hardening.
▪Avoid duty points for continuous operation at very low speeds and small flow
rates (<0.7 x Qopt4) ).
▪Observe the 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 the respective impeller types in combination with the fluids described
below.
Impeller with cutter
(impeller type S)
Suitable for the following fluids:
Faeces, domestic sewage and waste water
containing long fibres
Free-flow impeller
(impeller type F)
Suitable for the following fluids:
Fluids containing solids and stringy
material as well as fluids with entrapped
air or gas
Closed single-vane
impeller
(impeller type E)
Suitable for the following fluids:
Fluids containing solids and stringy
material
Closed multi-vane
impeller
(impeller type K)
Suitable for the following fluids:
Contaminated, solids-laden, non-gaseous
fluids without stringy material
2) Minimum permissible flow rate
3) Maximum permissible flow rate
4) Best efficiency point
2 Safety
Amarex KRT 9 of 78

Open, diagonal single-
vane impeller
(impeller type D)
Suitable for the following fluids:
Waste water with solid substances and
long fibres
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 specified in the data sheet and in
the product literature regarding pressure, temperature, etc.
▪Observe all safety information and instructions in this manual.
2.4 Personnel qualification and training
All personnel involved must be fully qualified to install, operate, maintain and
inspect the machinery this manual refers to.
The responsibilities, competence and supervision of all personnel involved in
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.
2.5 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
2.6 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 and safety regulations
▪Explosion protection regulations
▪Safety regulations for handling hazardous substances
▪Applicable standards and laws
2.7 Safety information for the operator/user
▪The operator shall fit contact guards for hot, cold and moving parts, and check
that the guards function properly.
▪Never remove a contact guard while the pump is running.
2 Safety
10 of 78 Amarex KRT

▪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.)
2.8 Safety information for maintenance, inspection and installation work
▪Modifications or alterations of the pump are only permitted with the
manufacturer's prior consent.
▪Use only original spare parts or parts authorised by the manufacturer. The use of
other parts can invalidate any liability of the manufacturer for resulting damage.
▪The operator ensures that all maintenance, inspection and installation work is
performed by authorised, qualified specialist personnel who are thoroughly
familiar with the manual.
▪Carry out work on the pump (set) during standstill only.
▪The pump casing 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.
▪Decontaminate pumps which handle fluids posing a health hazard.
▪As soon as the work is completed, re-install and/or re-activate any safety-relevant
and protective devices. Before returning the product to service, observe all
instructions on commissioning. (⇨ Section 6.1 Page 34)
2.9 Unauthorised 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 supplied pump
(set) is only valid if the equipment is used in accordance with its intended use.
2.10 Explosion protection
Always observe the information on explosion protection given in this section when
operating an explosion-proof pump set.
Sections of the manual marked by the Ex symbol apply to explosion-proof pump sets
also when temporarily operated outside potentially explosive atmospheres.
Only pumps/pump sets marked as explosion-proof and identified as such in the data
sheet must be used in potentially explosive atmospheres.
Special conditions apply to the operation of explosion-proof pump sets in accordance
with EC Directive 94/9/EC (ATEX).
Especially adhere to the sections in this manual marked with the Ex symbol.
The explosion-proof status of the pump set is only assured if the pump set is used in
accordance with its intended use.
Never operate the pump (set) outside the limits stated in the data sheet and on the
name plate.
Prevent impermissible modes of operation at all times.
2.10.1 Repair
Special regulations apply to repair work on explosion-proof pumps. Modifications or
alteration of the pump set may affect explosion protection and are only permitted
after consultation with the manufacturer.
!DANGER
2 Safety
Amarex KRT 11 of 78

Repair work at the flameproof joints must only be performed in accordance with the
manufacturer's instructions. Repair to the values in tables 1 and 2 of EN 60079-1 is
not permitted.
2 Safety
12 of 78 Amarex KRT

3 Transport/Temporary Storage/Disposal
3.1 Transport
DANGER
Improper transport
Danger to life from falling parts!
Damage to the pump set!
▷Use the attachment point provided (eyebolt, lifting lug or bail) for attaching
lifting accessories.
▷Never suspend the pump set by its power cable.
▷Never use chains or lifting ropes included in KSB's scope of supply for lifting
loads other than the KSB product supplied.
▷Safely attach transport ropes or chains to the pump and crane.
Transport the pump set as shown.
Fig. 1: Transporting the pump set
Setting down the pump set
WARNING
Placing the pump set on an unsecured and uneven mounting surface
Personal injury and damage to property!
▷Always place the pump set on a solid and level surface with the pump set in
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 overturning or tipping
over.
▷Refer to the weights given in the data sheet/name plate.
WARNING
Improper placing of pump sets in vertical/horizontal position
Personal injury and damage to property!
▷Use appropriate means to secure the pump set against overturning or tipping
over.
▷Use two lifting devices when handling large pump sets, if possible (using the
attachment point provided on the motor and the discharge nozzle).
▷Secure power cables against falling.
▷Use additional supports for the transport holder to secure the pump set against
overturning.
▷Maintain sufficient safety distance when lifting the pump set.
3 Transport/Temporary Storage/Disposal
Amarex KRT 13 of 78

WARNING
Improper lifting/moving of heavy assemblies or components
Personal injury and damage to property!
▷Use suitable transport devices, hoisting equipment and lifting tackle to move
heavy assemblies or components.
3.2 Storage/Preservation
If commissioning is to take place some time after delivery, we recommend that the
following measures be taken for pump set storage:
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 by humidity, dirt, or vermin
Corrosion/contamination of the pump (set)!
▷For outdoor storage cover the packed or unpacked pump (set) and accessories
with waterproof material.
CAUTION
Wet, contaminated or damaged openings and connections
Leakage or damage to the pump set!
▷Only remove caps/covers from the openings of the pump set at the time of
installation.
Table 5: Ambient conditions for storage
Ambient conditions Value
Relative humidity 5 % to 85 %
(non-condensing)
Ambient temperature - 20 ℃ 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.
3.3 Return to supplier
1. Drain the pump as per operating instructions. (⇨ Section 7.3 Page 45)
2. Always flush and clean the pump, particularly if it has been used for handling
noxious, explosive, hot or other hazardous fluids.
3. If the fluids handled by the pump leave residues which might lead to corrosion
damage when coming into contact with atmospheric humidity, or which might
ignite when coming into contact with oxygen, the pump set must also be
3 Transport/Temporary Storage/Disposal
14 of 78 Amarex KRT

neutralised, and anhydrous inert gas must be blown through the pump for
drying purposes.
4. Always complete and enclose a certificate of decontamination when returning
the pump (set). (⇨ Section 11 Page 75)
It is imperative to indicate any safety and decontamination measures taken.
NOTE
If required, a blank certificate of decontamination can be downloaded from the KSB web
site at: www.ksb.com/certificate_of_decontamination
3.4 Disposal
WARNING
Fluids posing a health hazard and/or hot fluids
Hazardous to persons and the environment!
▷Collect and properly dispose of flushing liquid and any liquid 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 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.
3 Transport/Temporary Storage/Disposal
Amarex KRT 15 of 78

4 Description of the Pump (Set)
4.1 General description
Pump for handling untreated waste water containing long fibres and solid
substances, fluids containing air/gas as well as raw, activated and digested sludge. (⇨
Section 2.3 Page 8)
4.2 Designation
Example: KRTK 150-315/164XG-S
Table 6: Key to the designation
Code Description
KRT Type series
K Impeller type, e.g. K = channel impeller
150 Nominal discharge nozzle diameter (DN) [mm]
315 Maximum nominal impeller diameter [mm]
16 Motor size
4 Number of poles
X Motor version e.g. X = explosion-proof to ATEX II 2GT3
G Material variant e.g., G = complete pump in grey cast iron
S Installation type, e.g. S = stationary wet installation
without cooling system
4.3 Name plate
Aktiengesellschaft
67227 Frankenthal
Aktiengesellschaft
67227 Frankenthal
TYPE
Amarex KRTK 150-315 /164 XG-S
No. 9971235943/000100
Q 300 m
3
/ h
H 14 m 2010
TEMP. MAX. 40 °C 0150 kg
Motor IP 68 SUBM. MAX. 30 m
CLASS F
DKN 160.4-12 3 ~
M.-No. 123456
P
2
16 kW 400/690 V
50
Hz
cos φ 0.81
1480 min
-1
14,3/8,3 A
I A /I N
4,9
S1
0035
II2G Ex dc IIB T3
WARNUNG - NICHT UNTER SPANNUNG öFFNEN
WARNING - DO NOT OPEN WHEN EN ERGIZED
AVERTISSEMENT - NE PAS OUVRIR SOUS TENSION
Mat. No. 01231886 ZN 3826 – M 29
TYPE
Amarex KRTK 150-315 /164 UG-S
No. 9971235943/000100
Q 300 m
3
/ h
H 14 m 2010
TEMP. MAX. 40 °C 0150 kg
Motor IP 68 SUBM. MAX. 30 m
CLASS F
DKN 160.4-12 3 ~
M.-No. 123456
P
2
16 kW 400/690 V
50
Hz
cos φ 0.81
1480 min
-1
14,3/8,3 A
I A /I N
4,9
S1
WARNUNG - NICHT UNTER SPANNUNG öFFNEN
WARNING - DO NOT OPEN WHEN EN ERGIZED
AVERTISSEMENT - NE PAS OUVRIR SOUS TENSION
Mat. No. 01232061 ZN 3826 – M 34
II2G Ex d IIB T3 PTB 10 Atex 1027X
1
a) b)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
22
21
Fig. 2: Name plate a) Standard pump set b) Explosion-proof pump set
1 Designation (⇨ Section 4.2 Page 16) 2 KSB order number
3 Flow rate 4 Maximum fluid and ambient temperature
5 Total weight 6 Enclosure
7 Motor type 8 Rated power
9 Rated speed 10 Rated voltage
11 Rated current 12 Head
13 Year of construction 14 Maximum immersion depth
15 Thermal class of winding insulation 16 Motor number
17 Power factor at design point 18 Mode of operation
19 Rated frequency 20 Starting current ratio
21 ATEX marking for the submersible motor 22 ATEX marking for the pump set
4.4 Design details
Design
▪Fully floodable submersible motor pump
4 Description of the Pump (Set)
16 of 78 Amarex KRT

▪Not self-priming
▪Close-coupled design
Impeller type
▪Various, application-oriented impeller types (⇨ Section 2.3 Page 8)
Shaft seal
▪Two bi-directional mechanical seals in tandem arrangement, with liquid reservoir
▪Reinforced bearings with leakage chamber
Standard bearing assembly
▪Grease-packed bearings sealed for life
▪Maintenance-free
Reinforced bearing assembly
Motor-end bearing:
▪Grease-packed bearings sealed for life
▪Maintenance-free
Pump-end bearing:
▪Grease-packed bearings sealed for life
▪Re-lubrication possible
The following hydraulic system/motor combinations have reinforced bearings:
Table 7: Reinforced bearings
Hydraulics
size
Motor size and number of poles
372 552 554 504 654
D 80-315 X X - - -
D 100-315 X X - - -
D 150-400 - - X X X
D 150-401 - - - X X
D 200-400 - - - X X
D 250-400 - - X X X
Drive
▪Three-phase asynchronous squirrel-cage motor
Explosion-proof pump sets are supplied with an integrated motor of Ex d IIB type of
protection.
4.5 Types of installation
Two design variants are available, depending on the installation type:
▪Stationary wet installation (installation type S)
▪Transportable wet installation (installation type P)
The pump set is designed for continuous operation in submerged condition. 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.
4 Description of the Pump (Set)
Amarex KRT 17 of 78

4.6 Configuration and function
1
3
4
6
7
8
9
10
5
2
Fig. 3: 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
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.
The fluid enters the pump axially via a suction nozzle (6) and is accelerated outward
in a cylindrical flow 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 inlet. At the rear
side of the impeller, the shaft (4) enters the casing via the discharge cover (3). The
shaft passage through the discharge cover is sealed towards the atmosphere with a
shaft seal (8). The shaft runs in rolling element bearings (9 and 10), which are
supported by a bearing bracket (5) linked with the pump casing and/or discharge
cover.
The pump is sealed by two bi-rotational mechanical seals in tandem arrangement.
A lubricant reservoir in-between the seals ensures cooling and lubrication of the
mechanical seals.
4.7 Scope of supply
Depending on the model, the following items are included in the scope of supply:
Stationary wet installation (installation types S)
▪Pump set complete with power cables
▪Claw with sealing material and mounting elements
▪Lifting rope or chain
▪Mounting bracket with mounting elements
Design
Function
Sealing
4 Description of the Pump (Set)
18 of 78 Amarex KRT

▪Duckfoot bend with mounting elements
▪Guide accessories
(guide rails are not included in KSB's scope of supply)
Transportable wet installation (installation type P)
▪Pump set complete with power cables
▪Foot plate or pump stool with mounting elements
▪Lifting rope or chain
NOTE
A separate name plate is included in KSB's scope of supply.
This name plate must be attached in a clearly visible position outside the place of
installation, e.g. at the control panel, pipeline or mounting bracket.
4.8 Dimensions and weights
For dimensions and weights please refer to the general arrangement drawing/outline
drawing or data sheet of the pump set.
4 Description of the Pump (Set)
Amarex KRT 19 of 78

5 Installation at Site
5.1 Safety regulations
DANGER
Improper installation in potentially explosive atmospheres
Explosion hazard!
Damage to the pump set!
▷Comply with the applicable local explosion protection regulations.
▷Observe the information given in the data sheet and on the name plate of the
pump set.
DANGER
Persons in the tank during pump operation
Electric shock!
▷Never start up the pump set when there are persons in the tank.
WARNING
Impermissible solid objects (tools, screws/bolts or similar) in the pump sump/inlet tank
during pump start-up
Personal injury and damage to property!
▷Check the pump sump/inlet tank for impermissible solid objects before flooding,
and remove, if necessary.
5.2 Checks to be carried out prior to installation
5.2.1 Checking the operating data
Before installing the pump set, verify that the name plate data matches the data
given in the purchase order and the site system data.
5.2.2 Preparing the place of installation
Place of installation for stationary models
WARNING
Installation on foundations which are unsecured and cannot support the load
Personal injury and damage to property!
▷Make sure the foundation concrete is of sufficient strength (min. C25/30 to
DIN 1045).
▷Make sure the foundation has set firmly before placing the duckfoot bend on it.
▷Only place the duckfoot bend on horizontal and level surfaces.
▷Refer to the weights given in the data sheet/name plate.
Any resonances at the usual excitation frequencies (1x and 2x rotational frequency,
rotational noise) must be prevented both in the foundation and in the connected
piping, as such frequencies may cause extreme vibrations.
1. Check the structural requirements.
All structural work required must have been prepared in accordance with the
dimensions stated in the outline drawing/general arrangement drawing.
Resonances
5 Installation at Site
20 of 78 Amarex KRT