Page 1
Operating Instructions
1387.82/01-10
RDLO
Volute Casing Pump
with Radial Impeller
These operating instructions contain fundamental
information and precautionary notes. Please read the
manual thoroughly prior to installation of unit, electrical
connection and commissioning.
It is imperative to comply with all other operating instructions
referring to components of individual units.
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RDLO
Contents
Page
1 General 4
2 Safety 4
2.1 Marking of Instructions in the Manual 4
2.2 Personnel Qualification and Training 4
2.3 Non-compliance with Safety Instructions 5
2.4 Safety Awareness 5
2.5 Safety Instructions for the Operator / User 5
2.6 Safety Instructions for Servicing, Inspection and Installation Work 5
2.7 Unauthorised Modification and Manufacture of Spare Parts 5
2.8 Impermissible Modes of Operation 5
3 Transport and Interim Storage 6
3.1 Safety Instructions 6
3.2 Transport 6
3.3 Lifting and Transport of the Pump Unit by Crane 6
3.4 Interim storage 6
4 Description of the Product and Accessories 7
4.1 Technical Specification 7
4.2 Design Details 7
4.2.1 Pump Casing 7
4.2.2 Impeller 7
4.2.3 Pump Shaft 7
4.2.4 Shaft seal 7
4.2.5 Bearings and Lubrication 7
4.3 Accessories 7
4.4 Dimensions and Weights 7
5 Installation at Site 7
5.1 Safety Regulations 7
5.2 Checks to Be Carried Out Prior to Installation 7
5.3 Installing the Pump / Unit 7
5.4 Connecting the Piping 8
5.5 Flushing Pipe 8
5.6 Auxiliary Connections 8
5.7 Coupling Guard 9
5.8 Final Check 9
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RDLO
6 Commissioning, Start-up/ Shutdown 9
6.1 Commissioning 9
6.2 Shaft Seal 9
6.3 Venting 9
6.4 Commissioning 9
6.4.1 Checking the Direction of Rotation 9
6.4.2 Start-up 10
6.4.3 Pump Operating Range 10
6.4.4 Shutdown 10
6.5 Shutdown / Storage / Preservation 11
6.5.1 Storage of New Pumps 11
6.5.2 Measures to Be Taken for Prolonged Shutdown 11
6.6 Returning to Service after Storage 11
7 Servicing / Maintenance 11
7.1 General Instructions 11
7.2 Servicing / Inspection 12
7.2.1 Supervision of Operation 12
7.2.2 Servicing of the Shaft Seal 12
7.2.3 Servicing of the Bearings 12
7.3 Dismantling 13
7.3.1 Fundamental Instructions and Recommendations 13
7.3.2 Dismantling 14
7.4 Reassembly 15
7.5 Instructions for Replacement of Assemblies / Parts 17
7.5.1 Replacing the Shaft Seal 17
7.5.2 Replacing the Casing Wear Rings and / or Impeller Wear Rings 17
7.6 Routine Servicing and Inspection Intervals 18
7.7 Supervision Plan 19
7.8 Spare Parts 20
7.8.1 Purchasing of Spare Parts 20
7.8.2 Spare Parts Stock 20
8 Trouble-shooting 21
8.1 General 21
8.2 Causes of Faults and Their Remedies 22
9 Relevant Documentation Annex
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RDLO
1 General
This KSB pump has been developed in accordance
with state-of-the-art technology, it is manufactured
with utmost care and subject to continuous quality
control.
These operating instructions are intended to
facilitate familiarisation with the pump and its
designated use.
The manual contains important information for
reliable, proper and efficient operation. Compliance
with the operating instructions is of vital importance
to ensure reliability and a long service life of the
pump and to avoid any risks.
These operating instructions do not take into
account local regulations; the operator must ensure
that such regulations are strictly observed by all,
including the personnel called in for installation.
This pump/unit must not be operated beyond the
limit values specified in the technical documentation
for the medium handled, capacity, speed, density,
pressure, temperature and motor rating. Make sure
that operation is in accordance with the instructions
laid down in this manual or in the contract
documentation.
2.1 Marking of Instructions in the Manual
The safety instructions contained in this manual
whose non-observance might cause hazards to
persons are specially marked with the general
hazard sign, namely
safety sign in accordance with DIN 4844 - W9.
The electrical danger warning sign is
safety sign in accordance with DIN 4844 - W8.
The word
Caution
is used to introduce safety instructions whose nonobservance may lead to damage to the machine
and its functions.
Instructions attached directly to the machine, e.g.
The name plate indicates the type series/size, main
operating data and works/serial number; please
quote this information in all queries, repeat orders
and particularly when ordering spare parts.
If you need any additional information or
instructions exceeding the scope of this manual or
in case of damage please contact KSB's nearest
customer service centre.
2 Safety
These operating instructions contain fundamental
information which must be complied with during
installation, operation and servicing. Therefore this
operating manual must be read and understood
both by the installing personnel and the responsible
trained personnel/operators prior to installation and
commissioning, and it must always be kept close to
the location of operation of the machine/unit for
easy access.
Not only must the general safety instructions laid
down in this chapter on "Safety" be complied with,
but also the safety instructions outlined under
specific headings.
- arrows indicating the direction of rotation
- markings for fluid connections
must always be complied with and be kept in
perfectly legible condition at all times.
2.2 Personnel Qualification and Training
All personnel involved in the operation, servicing,
inspection and installation of the machine must be
fully qualified to carry out the work involved.
Personnel responsibilities, competence and
supervision must be clearly defined by the operator.
If the personnel in question is not already in
possession of the requisite know-how, appropriate
training and instruction must be provided. If
required, the operator may commission the
manufacturer/supplier to take care of such training.
In addition, the operator is responsible for ensuring
that the contents of the operating instructions are
fully understood by the responsible personnel.
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Page 5
RDLO
2.3 Non-compliance with Safety
Instructions
Non-compliance with safety instructions can
jeopardise the safety of personnel, the environment
and the machine itself. Non-compliance with these
safety instructions will also lead to forfeiture of any
and all rights to claims for damages.
In particular, non-compliance can, for example,
result in:
- failure of important machine/unit functions
- failure of prescribed servicing and maintenance
practices
- hazard to persons by electrical, mechanical,
chemical and thermal effects
- hazard to the environment due to leakage of
hazardous substances.
2.4 Safety Awareness
It is imperative to comply with the safety instructions
contained in this manual, the relevant national
health and safety regulations and the operator's
own internal work, operation and safety regulations.
2.6 Safety Instructions for Servicing,
Inspection and Installation Work
The operator is responsible for ensuring that all
servicing, inspection and installation work be
performed by authorised, qualified specialist
personnel who are thoroughly familiar with the
manual.
Work on the machine must be carried out only
during standstill. The shutdown procedure
described in the manual for taking the machine out
of service must be adhered to without fail.
Pumps or pump units handling media injurious to
health must be decontaminated.
Immediately following completion of the work, all
safety-relevant and protective devices must be reinstalled and/or re-activated.
Please observe all instructions set out in the
chapter 6.1 on "Commissioning" before returning
the machine to service.
2.7 Unauthorised Modification and
Manufacture of Spare Parts
2.5 Safety Instructions for the Operator /
User
- Any hot or cold components that could pose a
hazard must be equipped with a guard by the
operator.
- Guards which are fitted to prevent accidental
contact with moving parts (e.g. coupling) must
not be removed whilst the machine is operating.
- Leakages (e.g. at the shaft seal) of hazardous
media handled (e.g. explosive, toxic, hot) must
be contained so as to avoid any danger to
persons and the environment. Pertinent legal
provisions must be adhered to.
- Electrical hazards must be eliminated. (In this
respect refer to the relevant safety regulations
applicable to different countries and/or the local
energy supply companies.)
Modifications or alterations of the machine are only
permitted after consultation with the manufacturer.
Original spare parts and accessories authorised by
the manufacturer ensure safety. The use of other
parts can invalidate any liability of the manufacturer
for consequential damage.
2.8 Impermissible Modes of Operation
The warranty relating to the operating reliability and
safety of the pump/unit supplied is only valid if the
machine is used in accordance with its designated
use and if all operating instructions described in
chapter 1 have been followed. The limits stated in
the data sheet must not be exceeded under any
circumstances.
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3 Transport and Interim Storage
3.1 Safety Instructions
Transport of the unit requires proper
preparation and handling. Observe the following
explanations and safety instructions.
3.2 Transport
Transport in horizontal position is recommended in
all cases, since this ensures stable positioning of
the unit without any risk of accident, whatever the
method of transport is, e.g. road, rail or ship, etc.
For transport purposes the unit should be secured
on suitable pallets or sleds. All loose and movable
parts must be secured.
3.3 Lifting and Transport of the Pump
Unit by Crane
RDLO
The motor lifting lugs may only be used for
lifting the motor alone and never for lifting the
complete unit.
When a crane is used to lift or transport the unit,
pay attention to the angle of spread of the lifting
equipment (ropes, belts).
Avoid angles of more than 90 °!
Use separate belts on each side!
The diagrams on the right show how to correctly lift
and transport the unit by crane.
3.4 Interim storage
Please observe the instructions set out in the
chapter 6.5 “ Shutdown / Storage / Preservation”
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RDLO
4 Description of the Product and
Accessories
4.1 Technical Specification
The KSB pump of the RDLO type series is a
horizontally installed, single-stage, axially split
volute casing pump with double-entry radial
impeller. Connecting flanges are manufactured on
option to ISO, DIN EN, or ASME.
RDLO is designed for use in waterworks, irrigation
and drainage pumping stations, power stations,
industrial water supply systems, shipbuilding as well
as general petrochemical applications.
4.2 Design Details
4.2.1 Pump Casing
Axially split volute casing with replaceable casing
wear rings.
Suction and discharge nozzles in the lower casing
half are at the same level (in-line design).
4.2.2 Impeller
The double-entry radial impeller is manufactured for
the individual operating data; including wear rings, if
requested.
In double-entry radial impellers the axial thrust is
largely balanced.
4.3 Accessories
The accessories supplied with the pump are
specified in the relevant individual operating
instructions in chapter 9.
4.4 Dimensions and Weights
For dimensions and weights please refer to the
installation drawing in section 9.1.
5 Installation at Site
5.1 Safety Regulations
Electrical equipment operated in
hazardous locations of the zone 1 must comply
with the explosion protection regulations. This
is indicated on the motor rating plate.
If the equipment is installed in hazardous
locations, the applicable local explosion
protection regulations and the regulations of the
test certificate supplied with the equipment and
issued by the responsible approval authorities
must be observed and complied with.
The test certificate must be kept close to the
location of operation for easy access (e.g.
foreman's office).
4.2.3 Pump Shaft
The shaft is fully sealed against the medium
pumped. Shaft protecting sleeves are fitted in the
seal area.
4.2.4 Shaft seal
The shaft is sealed on the driven and non-driven
ends by a gland packing or by a balanced
mechanical seal that is independent of the direction
of rotation.
The gland packings mounted on KSB pumps are
asbestos-free and suitable for drinking water
applications.
For a description of the mechanical seal, see
section 9.5.
4.2.5 Bearings and Lubrication
The pump is fitted on either side with greaselubricated or oil-lubricated (optional) rolling element
bearings. The locating bearing is situated on the
driven end.
5.2 Checks to Be Carried Out Prior to
Installation
All structural work required must have been
prepared in accordance with the dimensions
stated in the installation drawing.
The concrete foundations shall have sufficient
strength (min. BN 150) to ensure safe and
functional installation in accordance with DIN
1045 or equivalent standards.
Make sure that the concrete foundation has set
firmly before placing the unit on it. Its surface should
be truly horizontal and even.
5.3 Installing the Pump / Unit
Caution
data on the name plate for compliance with the data
in the purchase order and the system data, e.g.
operating voltage, frequency, medium temperature,
etc.
The installation drawing in section 9.1 must be
observed.
Prior to installing the pump, check
the operating data. Check the
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Page 8
RDLO
Prior to installation, the personnel involved must be
informed on the local safety regulations by the site
management.
For all work mentioned below, the pump must be
set up safely and secured as required.
Place the levelling spindles included in the scope of
supply beside the foundation bolt recesses as
shown in the installation drawing. Then place the
baseplate with the foundation bolts inserted onto
the levelling spindles and align it with their help.
Place the pump and motor onto the baseplate and
align their shafts in relation to each other.
Grout the recesses for the foundation bolts with
quick-setting concrete. When the concrete has set,
tighten the foundation bolts until the nuts fit tightly to
the baseplate.
Lift the pump and motor off the baseplate.
Grout the baseplate with concrete. Make sure the
baseplate is completely filled and no cavities
remain.
When the concrete has set, tighten the foundation
bolts uniformly. The tightening torque is given in the
installation drawing in section 9.1.
After tightening of the foundation bolts, mount the
pump and motor on the baseplate and align their
shafts in relation to each other.
load on the pump. With short pipelines, the nominal
diameters should be at least equal to the nominal
diameters of the pump nozzles. For long pipelines
the most economical nominal diameter has to be
determined from case to case.
Any additional loads on the discharge and
suction nozzles, e.g. caused by the weight of the
water-filled pipes, changes in the length of pipes
owing to temperature fluctuations, reaction forces
due to unbraced expansion joints must not exceed
the values stated in the installation drawing.
An excessive, impermissible increase in the
pipeline forces may cause leaks on the pump where
the medium handled can escape into the
atmosphere.
Danger of life when hot media are handled!
Furthermore, impermissibly high forces and
moments acting on the nozzles may impair the
alignment of the pump set and cause damage to the
coupling, bearings or shafts.
The flange covers on the pump suction and
discharge nozzles must be removed prior to
installation in the piping.
5.5 Flushing Pipe
Caution
Observe the operating instructions for the
coupling.
The run-out between pump shaft and motor shaft
shall be smaller than 0.05 mm.
Faulty alignment can destroy the transmission
elements of the coupling and the bearings of motor
and pump.
In addition, check whether the direction of rotation
corresponds to the direction indicated by the arrow
on the pump casing.
5.4 Connecting the Piping
Caution
Suction lift lines should be laid with a rising slope
towards the pump and suction head lines with a
downward slope towards the pump. The pipelines
should be anchored in close proximity to the pump
and should be connected without transmitting any
stresses or strains. Their weight must not exert any
Never use the pump itself as an
anchorage point for the piping.
The pump has been equipped with a flushing pipe
at the factory.
Usually we supply this assembly completely
mounted on the pump. Should this, however, not be
the case, mount the hoses and fittings as shown on
the attached drawing.
5.6 Auxiliary Connections
The dimensions and locations of the auxiliary
connections (cooling, heating, sealing liquid,
flushing liquid, etc.) are indicated on the installation
drawing in section 9.1.
More detailed installation instructions are given in
the respective operating instructions for the
accessories.
These connections are required for proper
functioning of the pump and, therefore, are of
paramount importance!
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5.7 Coupling Guard
In compliance with the accident prevention
regulations the pump must not be operated without
a coupling guard. If the customer specifically
requests not to include a coupling guard in our
delivery, then the operator must supply one.
5.8 Final Check
Re-check the alignment of the pump set.
It must be easy to rotate the shaft by hand by
means of the coupling.
Check the integrity and proper functioning of all
connections.
6 Commissioning, Start-up/
Shutdown
Compliance with the following
Caution
from non-compliance shall not be covered by the
scope of warranty.
6.1 Commissioning
Before starting up the pump make sure that the
following requirements have been checked and
fulfilled:
The pump has been firmly bolted to the
baseplate/foundation?
The coupling or pump unit have been aligned as
specified?
The pipes have been properly fitted?
requirements is of paramount
importance. Damage resulting
The rolling element bearings have been packed
with grease or (if applicable) the constant-level
oilers have been mounted and filled with oil? (See
section 7.2.3)
The pump has been vented as specified in section
6.3.?
6.2 Shaft Seal
Mechanical Seal
For putting the shaft seal into operation, refer to the
operating instructions of the mechanical seal in
section 9.5.
Gland Packing
Commission the pump with the gland no tighter than
finger-tight. A high, initial leakage rate – in keeping
with the medium pumped – is acceptable (approx.
50 to 200 drops per minute) until the packing
material has settled and become adjusted to the
working temperature (after approx. 30 minutes).
After running-in the packing material, reduce the
leakage rate to a very slight drip by tightening the
gland further carefully and evenly. Do not stop the
leakage altogether, as this would cause the gland
packing to become hot.
N. B.:
If the leakage is accompanied by a build-up of heat:
switch off the pump, if necessary. Let the pump cool
down (for approx. 10 to 15 minutes), then repeat the
start-up procedure. The required minimum leakage
rate depends on the pressure, slip velocity and
temperature of the medium pumped. It should be in
the range of approx. 10 to 120 drops per minute (20
drops of water correspond to approximately 1 ml).
The motor has been installed according to its
operating instructions?
The unit can be easily rotated by hand at the
coupling? (Carry out at least one full rotation)
The coupling guard has been fitted?
The staff have been informed about sources of
danger and measures to be taken to comply with
the accident prevention regulations?
The unit is protected against overload (appropriate
safety valve)?
The seals have been mounted correctly? (For gland
packings, see section 7.4, for mechanical seals,
see section 9.5 of these operating instructions).
Additional devices, if any, have been prepared and
fitted according to their operating instructions?
Page 9 of 24
6.3 Venting
Before start-up, the pump and the pipes must be
vented and primed with the liquid to be pumped. For
this purpose, use the vent plug or the vent valve
(option) at the top of the volute casing; in the case
of suction lift operation, the pump must be
evacuated additionally.
6.4 Commissioning
6.4.1 Checking the Direction of Rotation
Caution
rotation of the impeller is of paramount importance.
If running in the wrong direction of rotation, the
For trouble-free operation of the
pump, the correct direction of
Page 10
pump cannot reach its duty point; vibrations and
overheating will be the consequence. The pump set
or the shaft seal might be damaged.
RDLO
Correct Direction of Rotation
The direction of rotation must correspond to the
direction indicated by the arrow on the pump. This
can be verified by switching the pump on and then
off again immediately.
Before checking the direction of rotation
make sure that there is no foreign matter in the
pump casing.
Never put your hands or any other objects into
the pump !
6.4.2 Start-up
Dry-running will result in
Caution
increased wear and must be
avoided.
If no non-return valve is fitted on the discharge side,
close the discharge gate valve.
Fully open the suction-side shut-off element, if
installed.
All additional connections for cooling, heating,
lubrication, flushing or sealing liquid, etc., if
applicable, must be opened fully or switched on,
and the throughflow must be checked.
Switch on the motor.
As soon as the pump starts to deliver – that means
when the discharge pressure at the gauge rises slowly open the discharge gate valve fully.
The pump may be operated
Caution
against a closed discharge gate
valve only during the start-up and shutdown phase,
as otherwise impermissible temperature increases
occur, which lead to damage.
required
available
1. Part-load operating limit at a low flow rate
This limit is indicated in the Q/H curve by Q
min
or by
the continuation of the characteristic curve which is
not depicted.
It is not permitted to operate the
Caution
Q
. Prolonged operation in this range causes
min
pump in the range from Q = 0 to
greatly increasing mechanical loads which the
components cannot withstand. Brief passing
through the critical range, e.g. during start-up, is
permitted
2. NPSH-induced limits in the part-load and
overload ranges
These two limits are based on the ratio of
NPSH
required
to NPSH
available
. They are determined
as follows:
The intersections of NPSH
required
and NPSH
available
are projected to the Q/H curve, where they produce
the operating limits (refer to the diagram). Checking
of the NPSH-induced operating limit is not
necessary for operating the pump under design
conditions. If system-induced changes occur, an
NPSH check must be carried out. If necessary,
consult KSB's nearest customer service centre.
6.4.3 Pump Operating Range
The flow rate "Q" as a function of the discharge
head is achieved automatically in accordance with
the Q/H curve. The permissible pump operating
range is subject to limits having causes that are
independent of each other.
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6.4.4 Shutdown
Close the shut-off element in the discharge line. If
the discharge line is equipped with a check valve,
the shut-off element may remain open, provided
there is back pressure in the line.
The shut-off element in the suction line must
not be closed when switching off the pump. Switch
off the motor, making sure that the unit runs
smoothly down to a standstill. In the case of
prolonged shutdown, the shut-off element in the
suction line has to be closed.
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RDLO
Close the auxiliary connections. The shaft seal in
pumps where the liquid is fed in under vacuum
must also be lubricated with sealing liquid during
standstill.
In the event of frost risk and/or prolonged
shutdowns, the pump – and if applicable the cooling
chambers - must be drained or otherwise protected
against freezing.
6.5 Shutdown / Storage / Preservation
Each KSB pump leaves the factory carefully
assembled. If commissioning is to take place some
time after delivery, we recommend that the following
measures be taken for pump storage.
6.5.1 Storage of New Pumps
- New pumps are supplied by our factory duly
prepared for storage. Maximum protection for up
to 12 months, if the pump is properly stored
indoors.
- Store the pump in a dry and vibration-free
location location.
- Rotate the pump shaft by hand once a month to
prevent the rolling element bearings from being
damaged.
Should there be a risk of humidity condensation
inside the pump, replace the lubricant fill of the
bearings and check the condition of the rolling
element bearings prior to commissioning.
6.5.2 Measures to Be Taken for Prolonged
Shutdown
1. The pump remains installed; periodic
check of operation
In order to make sure that the pump is always ready
for instant start-up and to prevent the formation of
deposits within the pump and the pump intake area,
start up the pump set once a month or once every 3
months for a short time (approx. 5 minutes) during
prolonged shutdown periods. Prior to an operation
check run ensure that there is sufficient liquid
available for operating the pump.
6.6 Returning to Service after Storage
Before returning the pump to service carry out all
checks and servicing work specified in sections 7.1
and 7.2.
In addition, the instructions laid down in
sections 6.1 "Commissioning" and 6.4.3 "Pump
Operating Range“ must be observed.
Upon completion of the work, all safetyrelated and protective equipment must be properly
refitted and/or reactivated before starting the pump
set.
7 Servicing / Maintenance
7.1 General Instructions
The operator is responsible for ensuring that all
servicing, inspection and installation work is carried
out by authorised, duly qualified staff who are
thoroughly familiar with these operating instructions.
A regular servicing schedule will help avoid
expensive repairs and contribute to trouble-free,
reliable operation of the pump with a minimum of
servicing expenditure and work.
Work on the unit may only be carried out
with the electrical connections disconnected.
Make sure that the pump set cannot be
switched on accidentally (danger of life!).
Pumps handling liquids posing health
hazards must be decontaminated. When
draining the medium see to it that there is no
risk to persons or the environment. All relevant
laws must be adhered to (danger of life!).
2. The pump is removed from the pipe and
stored
Before putting the pump into storage carry out all
checks specified in sections 7.1 to 7.4. Then apply
appropriate preservatives.
Spray-coat the inside wall of the pump casing, and
in particular the impeller clearance areas, with a
preservative. Spray the preservative through the
suction and discharge nozzles. It is advisable to
close the nozzles (for example with plastic caps).
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Page 12
RDLO
7.2 Servicing / Inspection
7.2.1 Supervision of Operation
Caution
The pump must never be allowed to run dry.
Prolonged operation against a closed shut-off
element is not permitted in order to prevent the
medium handled from heating up.
At room temperatures of up to 30 °C (86 °F) the
bearing temperature should not exceed 90 °C (194
°F). At higher room temperatures, the bearing
temperature should be below 100 °C (212 °F).
With oil-lubricated bearings, the correct oil level
must be checked at regular intervals.
During pump operation the shut-off element
in the inlet line must not be closed.
Any stand-by pumps installed should be switched
on and then immediately off again once a week to
keep them operational.
Attention should be paid to the correct functioning of
the auxiliary connections.
Caution
should be replaced in due time. See operating
instructions of the drive coupling in section 9.3.
If the liquid for sealing, cooling and lubricating is
taken from an external source, the pressure must
be 1.0 to 2.0 bar higher than at the suction nozzle.
7.2.2 Servicing of the Shaft Seal
Service the mechanical seal as outlined in section
9.5 of the manual.
Gland packings have to be packed with fresh
packing material as described in section 7.4 of this
manual after each extended period of standstill,
after each repair and as a remedy against an
excessive leakage rate. It is, therefore,
recommended to observe the leakage rate whilst
the pump is in operation, also to stop the gland
becoming hot.
7.2.3 Servicing of the Bearings
The pump should run quietly and
free from vibrations at all times.
If the flexible coupling elements
begin to show signs of wear, they
water collecting in the bearing, or that the grease
has become resinous or that it has run out, the
bearing has to be filled with a new supply of grease
before commissioning/start-up of the pump. In
addition, the grease has to be changed each time
the bearing is dismantled/re-assembled, at the
latest after two years.
Before packing the bearing with fresh grease, clean
the bearing itself, the bearing housing and bearing
cover with benzine, benzene or similar, and remove
all of the washing agent when finished. Fill the
hollow spaces between the rolling elements of the
bearings to capacity and the bearing covers
approximately half-way with grease, taking care to
observe the greatest possible cleanliness.
The bearing is re-lubricated with a grease gun by
means of the lubricating nipples at the bearing
covers. Use a high-quality, lithium soap-based
bearing grease that is free from resin or acid, is not
liable to crumble, and has good rust-preventive
characteristics. The grease should have a
penetration number between 2 and 3, which
corresponds to a worked penetration between 220
and 295 mm/10. The drop point should not be
below 175 °C.
Lubricating intervals, lubricant quantities as well as
the recommended type of grease are indicated in
the technical data of the pump in section 9.2.
Re-lubrication is only allowed with the pump in
operation.
7.2.3.2 Oil-lubricated Bearings
A constant-level oiler is provided on each bearing
housing of the pump.
Function of Constant-level Oiler
When the oil level in the bearing falls, the oil level in
the connection elbow supplying oil to the bearing
falls as well. This decrease in the oil level uncovers
the opening of the angular-cut pipe, and air enters
the oil reservoir. Consequently, a corresponding
quantity of oil can flow from the oil reservoir through
the pipe to the bearing housing, re-establishes the
predetermined oil level and covers the opening of
the angular-cut pipe again.
This process is repeated as often as the oil level in
the bearing housing drops - until the oil reservoir is
empty. The oil level can be easily checked through
the transparent oil reservoir.
7.2.3.1 Grease-lubricated Bearings
The rolling element bearings have been packed
with grease at the factory. Bearings and grease fill
have to be checked prior to commissioning/start-up.
If there is reason to suspect that shipment and/or
storage may have resulted in dirt or condensed
Page 12 of 24
The constant-level oilers must be fitted and filled
with oil prior to commissioning/start-up.
Page 13
RDLO
reservoir must be filled with oil. If this oil level is
underrun, top up with oil.
r
r
Gasket
Plug
Constant-level oiler
Sight glass
Gasket
Connection piece
Air inlet openings
Safety nut
Housing
Adjustment sleeve
Split sleeve
Venting pipe
Oil pipe
Oil level
Caution
below the vent opening arranged
at the top edge of the connection elbow! Make sure
the opening is always perfectly dry!
Oil Change Intervals
In order to ensure a long service life of the rolling
element bearings, the oil must be changed at the
following intervals:
1. Oil change after 300 operating hours
2. Oil change after 2000 operating hours
3. All subsequent oil changes after every 8000
operating hours, at least once a year.
The bearings must be cleaned thoroughly on every
oil change.
Always use clean oil!
Caution
Trouble
a) Oil reservoir empties,
oil level in the bearing housing rises.
The oil level must always be
Installation position of constant-level oiler
The constant-level oiler shall be mounted
depending on the direction of rotation as shown in
the figure above. The opposite hole shall be closed
with a plug.
Filling the constant-level oiler
Slacken the safety nut at the constant-level oiler,
draw out the oil reservoir of the constant-level oiler
and fill the reservoir of the constant-level oiler with
oil. Re-insert the oil reservoir of the constant-level
oiler and lock it.
As a general rule, oil should only
Caution
be topped up with the pump not
being in operation. Should it be unavoidable to top
up the oil of the constant-level oiler when the pump
is in operation, a temporary oil leakage might occur.
After a short time check whether
Caution
the oil level in the reservoir has
dropped. At least one third of the
Possible cause
Seal of oil reservoir is defective (air ingress).
b) Oil level in bearing housing falls,
no oil follows from the oil reservoir.
Possible cause
Vent opening at the connection elbow is clogged.
7.3 Dismantling
Before dismantling, secure the pump so as to
make sure it cannot be switched on accidentally.
The shut-off elements in the suction and discharge
lines must be closed. The pump must have cooled
down to ambient temperature, it must be drained
and its pressure must be released.
Dismantling and reassembly must always be
carried out in accordance with the relevant sectional
drawing.
7.3.1 Fundamental Instructions and
Recommendations
Page 13 of 24
Page 14
RDLO
Repair and servicing work on the pump must only
be carried out by specially trained personnel, using
original spare parts.
Observe the safety regulations laid down. Any
work on the motor shall be governed by the
specifications and regulations of the respective
motor supplier.
Dismantling and reassembly must always be
carried out in accordance with the relevant
sectional drawing. The sectional drawing and
other relevant documents are found in the
annex. The dismantling sequence can be
derived from the sectional drawing.
In case of damage you can always contact our
service departments.
7.3.2 Dismantling
Caution
Observe the operating
instructions of the coupling.
The pump is designed so that the complete rotor
can be removed in the sequence described below
without removing the suction or discharge pipe or
disturbing the alignment of the pump unit:
Close the suction and discharge gate valves and
drain the pump by opening the drain and vent plugs
or valves (option).
Pumps with oil-lubricated bearings: Drain the oil.
Remove the flushing pipe and any pipes between
additional equipment and the pump, if applicable.
Remove the coupling guard (680.1) and guards
(680.2).
Detach the pump-side coupling half as described in
the operating instructions of the coupling in section
9.3.
Remove the bolts (901.4) between the bearing
housings (350.1 and 350.2) and the upper part of
the volute casing (102).
Undo the casing split flange bolts (901.1), detach
the upper part of the volute casing (102) from the
lower casing half with the aid of the forcing screws
and remove it with lifting equipment. Lift the upper
part uniformly without tilting it. The interior of the
pump (impeller with casing wear rings, shaft seals)
is then accessible for inspection.
In order to lock the mechanical seals (if mounted),
engage the discs (550.5) in the groove of the shaft
protecting sleeve (524.2) and tighten the bolts
(901.3).
Remove the bolts (901.4) between the bearing
housings (350.1 and 350.2) and the lower part of
the volute casing (102).
Caution
driven end against falling
down.
Should the non-driven end bearing be a cylindrical
roller bearing, the entire bearing housing on the
non-driven end (350.2) along with the bearing cover
(360) can be removed from the shaft after removing
the bolts (901.4).
Lift the rotor upwards out of the lower casing half.
For further disassembly, place it down carefully and
secure it in horizontal position against rolling.
Unscrew the nuts (920.5) for fastening the bearing
cover (360) of the floating bearing (non-driven end)
and pull off the bearing housing (350.2).
Loosen the safety screw (914.1), then unscrew the
grooved nut (920.4).
Remove the disc spring (950.2) and the deepgroove ball bearing (321) with sleeve (520) from the
pump shaft (211).
Remove the bearing cover (360).
Remove the V-ring (411.1) from the spacer sleeve
(525.1), and the spacer sleeve from the shaft.
Remove the pump-side coupling half as described
in the operating instructions of the coupling in
section 9.3.
Undo the nuts (920.5) for fastening the bearing
cover (360) of the locating bearing and pull off the
adapter (145) and the bearing housing (350.1).
Remove the circlip (932) and pull the two angular
contact ball bearings (320) off the pump shaft (211).
Remove the bearing cover (360).
Remove the V-ring (411.1) from the spacer sleeve
(525.1) and the spacer sleeve from the shaft.
Gland Packing
Unscrew the nuts (920.2) on either side of the gland
(452, split), and remove the gland.
Pull out the packing rings with the help of a packing
extractor, and pull the shaft protecting sleeve
(524.1) out of the shaft seal housing (441).
Mechanical Seal
The two shaft seal housings (441) along with shaft
protecting sleeve (524.2), mechanical seal (433)
and seal cover (471) can be removed from the shaft
as a complete assembly unit, if the locking discs
(550.5) are engaged.
Unscrew the nuts (920.2) on either side of the seal
cover (471) and remove the complete seal cover
with mechanical seal and shaft protecting sleeve
(524.2) from the shaft seal housing (441).
Secure the bearing on the non-
Page 14 of 24
Page 15
RDLO
The impeller (234) has a sliding fit on the shaft and
can normally be removed easily. Should there be
any difficulty, use a wooden mallet and knock on
the hub to loosen the impeller in its fit.
7.4 Reassembly
Reassembly is effected in reverse order to
dismantling. For all work on the pump set use the
sectional drawing in conjunction with the list of
components and the assembly instruction for
orientation.
The customary rules of mechanical engineering as
well as the instructions for removal and installation
of shaft seal, impeller wear rings and casing wear
rings (sections 7.5.1 and 7.5.2) must be observed.
The data on cleaning, lubricating and sealing
agents given in the assembly instruction must be
observed, and the tightening torques indicated must
be complied with.
Remove any liquid sealant residues prior to
reassembly. O-rings and V-rings must be replaced
and their seats on the shaft must be cleaned. In
addition, all the sealing elements must be fitted in
the components provided for this purpose prior to
installation,
For reassembling the rotor, position the pump shaft
(211) securely. All fits, threads and sliding fits of the
shaft must be cleaned and coated with assembly
paste as indicated in the assembly instruction.
Insert the keys required for assembly in the pump
shaft (211).
Mount the impeller (234), which has a sliding fit.
When fitting the impeller, observe the direction of
rotation (see diagram below).
Place the casing wear rings on the running surfaces
of the impeller. Make sure that the bezels of the
rings are on the outside (towards the bearing).
Insert the pins required for fixing the casing wear
rings.
The remaining components are fitted first on the
locating bearing side (i.e. the driven end) of the
pump shaft.
Slide the spacer sleeve (525.3) over the pump shaft
(211).
Slide the shaft seal housing (441) and then the
shaft protecting sleeve (524.2) on the shaft.
Gland Packing
Press the packing rings one at a time into the
stuffing box chamber with the help of the gland
(452, split). Position the butt ends of each ring 90°
to 180° away from those of the previous ring. The
number of rings and the exact positions of neck ring
(457.1) or lantern ring (458), if mounted, are shown
in the sectional drawing. Compression-moulded
rings are to be preferred. After fitting all packing
rings, mount and tighten the gland lightly, so that
the packing rings take on the shape of the stuffing
box chamber. Unscrew the gland again to relax the
packing.
Mechanical Seal
Mount the mechanical seal in accordance with the
manufacturer's instructions in section 9.5 and join it
with the shaft protecting sleeve (524.2), seal cover
(471) and key (940.5). Then, in order to lock the
mechanical seal, engage the discs (550.5) in the
groove of the shaft protecting sleeve (524.2) and
tighten the bolts (901.3). Insert the unit in the shaft
seal housing (441) and fasten it (902.1 and 920.2).
Slide the complete assembly unit over the shaft.
For mounting the casing wear rings (502) and
impeller wear rings (503) observe section 7.5.2
"Replacing the casing wear rings and/or impeller
wear rings".
Page 15 of 24
Slide the spacer sleeve (525.1) over the shaft, and
V-ring (411.1) and bearing cover (360) over the
spacer sleeve.
Heat the two angular contact ball bearings (320)
(max 80°C) and fit them on the pump shaft (211). It
is essential to avoid one-sided pressure, e.g.
hammer blows, on the outer rings.
Mount the angular contact ball bearings in Xarrangement (face-to-face). It is imperative to
ensure that the inner rings of both angular contact
ball bearings are seated on each other without an
axial clearance.
Page 16
RDLO
The bearings are secured by the disc (550.1) and
the circlip (932).
To fit the spacer sleeve (525.3), shaft seal housing
(441) altogether with mechanical seal or gland
packing, shaft protecting sleeve (524.1 or 524.2),
seal cover (471), spacer sleeve (525.1) and V-ring
(411.1) as well as bearing cover (360) at the
floating bearing side, proceed as described above
for the driven end.
Heat the deep-groove ball bearing (321) to max.
80°C and fit it on the sleeve (520).
Slide the sleeve (520) with deep-groove ball
bearing (321) and disc (550.1) on the pump shaft
(211) - with the key (940.1) inserted.
It is imperative to observe the
Caution
instructions on servicing of the
bearings given in section 7.2.3.
For information on the bearing sizes please refer to
the technical annex, section 9.2.
Join the rotor parts elastically with grooved nut
(920.4) and disc spring (950.2). For this purpose
tighten the disc spring (950.2) as indicated in the
following table.
wear rings and the sealing faces of the shaft seal
housing (441) as described in the assembly
instruction.
Insert and align the rotor, making sure that the
direction of rotation is correct and the grooved pins
(561.1 and 561.2) are correctly seated in the
casing; see sectional drawing and diagram below.
Casing wear rings
Spaltringe
Thread size of
grooved nut (920.4)
M55 x 2
M60 x 2
M80 x 2
M90 x 2
M100 x 2
Tighten by
1 turn
(360 degrees)
1 turn
(360 degrees)
1 ¼ turns
(450 degrees)
1 ½ turns
(540 degrees)
1 ½ turns
(540 degrees)
This measure is essential to
Caution
compensate differences in
thermal expansion of the pump shaft (211) and the
components fitted on it.
Then tighten the safety screw (914.1) in order to
lock the grooved nut (920.4) in position.
The ribs on the shaft seal housings (441) have to
be arranged at an angle of 45° or 50° to the top in
relation to the horizontal line. The position of the
grooved pin (561.2) is then vertically to the bottom.
Prior to inserting the pump rotor in the pump casing,
apply a liquid sealant to the surfaces of the casing
Fasten the bearing housings (350.1 and 350.2) to
the lower part of the volute casing (102) by means
of the hexagon head bolts (901.4).
Place the V-rings (411.1) in their correct positions,
and fit the V-ring (411.2) and adapter (145).
Prior to fitting the upper part of the volute casing
(102), clean both casing split flanges meticulously.
Apply a thin film of liquid sealant to the entire
surface of the lower casing split flange as described
in the assembly instruction.
Carefully place the upper part of the volute casing in
position. Centring is effected by the casing wear
rings and the shaft seal housing (441).
Tighten the casing split flange bolts (901.1) in
diagonally opposite sequence, starting with the
bolts nearest the pump centreline. Fasten the
bearing housings (350.1 and 350.2) to the upper
part of the volute casing (102) by means of the
hexagon head bolts (901.4).
Insert the key (940.3) for fitting the coupling in the
pump shaft (211).
When fitting the coupling and accessories, observe
the individual operating instructions in the sections
9.3, 9.5, and 9.6.
Page 16 of 24
Page 17
7.5 Instructions for Replacement of
Assemblies / Parts
7.5.1 Replacing the Shaft Seal
Gland Packing
See the relevant instructions in sections 7.3 and
7.4.
Mechanical Seal
Prior to replacing the mechanical seal, the bearing
housings including the rolling elements and the
coupling must be removed. Refer to sections 7.3,
Dismantling, 7.4 Reassembly, and the operating
instructions of the mechanical seal in section 9.5.
7.5.2 Replacing the Casing Wear Rings and /
or Impeller Wear Rings
For the impeller clearance please refer to the
technical data sheets of the pump in section 9.2.
RDLO
After dismantling as described in section 7.3.2, the
casing wear rings (502) can be removed. When
fitting the rings, make sure that their bezels are on
the outside (towards the bearing).
The impeller wear rings (503, optional) were shrinkfitted on the impeller neck and, in addition, fixed
with two grub screws, see assembly instruction.
If the impeller has not been fitted with a wear ring at
the factory, and replacing of the casing wear ring
alone does not lead to a value near the required
impeller clearance (the impeller neck is badly worn
by clearance flows), the impeller neck can be
turned down in order to fit an impeller wear ring
(available as spare part).
Alternatively, a new impeller can be supplied.
Page 17 of 24
Page 18
7.6 Routine Servicing and Inspection Intervals
RDLO
Interval Number of
Daily 1 1/10
Weekly 1 1/4
Monthly
Every 4400 (radial ball
bearings)/
2 200 (radial roll
bearings
operating hours
personnel
required
1
1
11/4
Time
(hours)
1/4
1/4
Servicing work
- Check mechanical seal for leakage
or leakage rate of gland packing
- Check pump operation (suction
pressure, discharge head, bearing
temperature, noises and vibrations)
- Check torsional clearance of the
coupling (see operating instructions
of the coupling in section 9.3)
- Switch to stand-by pump, if any, or
carry out a test run (for 5 minutes)
- Re-lubricate grease-lubricated
rolling element bearings (relubrication quantity, see technical
data sheets of pump in section 9.2)
Every 7 500
operating hours
Every 4 years or if
discharge head
decreases
11/4
26
- Oil-lubricated rolling element
bearings, see section 7.2.3.2
- General inspection and overhaul of
pump in accordance with the
operating instructions
Check and replace, if required:
- wear parts such as bearings,
casing wear rings, impeller wear
rings, shaft sleeves
- impeller and shaft
- seal elements
Page 18 of 24
Page 19
RDLO
7.7 Supervision Plan
For the exact description of the pump design as well as the pump components and accessories supplied by
KSB, please refer to section 9 (technical annex) of this instruction manual.
Point to be supervised Supervisory action Value to be met
Mechanical seal
(if applicable)
Gland packing
(if applicable)
Pressure gauge, suction side p
s
(if applicable)
Pressure gauge, discharge side p
(if applicable)
Thermometer
(suction/discharge nozzle)
(if applicable)
Sight glass, flushing pipe
(if applicable)
Vibration measurement
(if applicable)
Constant-level oiler, bearing
(only oil-lubricated bearings)
Oil level indicator, bearing
(if applicable)
Bearing temperature
(if applicable)
Connecting coupling
(only if oil-lubricated)
Drive
(if applicable)
d
Checking the leakage once a week 15 drops/min.
Checking the leakage once a week 10 to 120 drops/min.
Checking the pressure once a week *
Checking the pressure once a week *
Checking the temperature once a
week
Checking the flushing water flow once
a week
Checking once a week *
Checking the oil level once a week
Checking the oil level once a week Min. mark
Checking once a week section 7.2
Checking the leakage once a week No leakage permitted
See the manufacturer's
documentation
Coupling guard Checking once a month
Earth connection Checking once a month
*
Water is flowing
Must have been mounted
without any contact
Connection must have been
made and marking applied
* see list of measuring points (if applicable) in section 9.1 (Pump Set) or interlock criteria in section 9.2
(Pump)
In case of deviations, proceed in accordance with the table in section 8 (Trouble-shooting).
Page 19 of 24
Page 20
RDLO
7.8 Spare Parts
7.8.1 Purchasing of Spare Parts
If spare parts are needed, these should be ordered from KSB's nearest customer service centre.
When ordering spare parts please always quote the following particulars which are stated on the name plate
or in the technical data of the pump in section 9.2):
Type series; works/serial number (P-No.) of pump; year of manufacture
The parts ordered should be specified as follows (see sectional drawing and list of spare parts):
Example:
Quantity Description Material Ident. No. Part No.
1
7.8.2 Spare Parts Stock
Rolling element
bearing
ST (8-digit number) 320
Recommended spare parts stock for 2 years' operation in accordance with VDMA 24296 (also applicable for
continuous operation):
Part No. Description Number of pumps (incl. stand-by pumps)
234568
10 and
more
Quantity of spare parts *
234 Impeller - - 1 1 1 2 30%
502 Casing wear ring 2 2 4 4 6 8 100%
503 Impeller wear ring 2 2 4 4 6 8 100%
Shaft with keys and shaft nuts - - 1 1 1 2 30%
320 Angular contact ball bearing 2 2 4 4 6 8 100%
321 Deep groove ball bearing 1 1 2 2 3 4 50%
524 Shaft protecting sleeve 2 2 4 4 6 8 100%
461 Set of packing rings 8 12 16 20 24 32 400%
Set of seal elements 4 6 8 8 9 12 150%
Mechanical Spring-loaded ring
seal Seat ring
433
O-rings
Seal elements on seat ring
Set of springs
*
These figures already include those components required twice for replacement
2
2
2
2
1
2
2
2
2
1
4
4
6
6
2
4
4
8
8
2
10
10
6
6
3
8
8
12
12
4
90%
90%
150%
150%
50%
Page 20 of 24
Page 21
8 Trouble-shooting
8.1 General
The diagram on the right serves to facilitate the
understanding of the causes of faults and their
remedies.
RDLO
Power
Head
Efficiency
Many faults on pumps have hydraulic causes. The
hydraulic behaviour of a pump is illustrated by its
characteristic curves H, P, Eta and NPSH in
combination with the system curves HA and
NPSHA. The duty point B is the intersection of the
system curve HA and the pump curve H.
If it is not possible to determine the cause of the
trouble, contact KSB's nearest KSB customer
service centre.
Operating Limit
Capacity
Page 21 of 24
Page 22
8.2 Causes of Faults and Their Remedies
Faults
Pump discharge pressure too low
| Pump discharge pressure too high
| | Excessive flow rate
| | | Insufficient flow rate
||||Power consumption is too high
|||||Pump does not deliver after starting
||||||Pump interrupts delivering
|||||||Pump runs rough (noise, vibrations)
||||||||Impermissible temperature increase at pump casing / shaft seal housing
|||||||||Bearing temperature too high
||||||||||Excessive leakage at the shaft seal
|||||||||||Drive is overloaded
||||||||||||Leakage at the pump
|||||||||||||
|||||||||||||
xxxxxx xx x
x
x x xxxx
x x x Formation of air pockets in the piping - Correct the suction conditions
x x xxx
xxxx
xxxx x
xx x
xxxx
x x Back pressure is lower than specified
xx
xx x x x
x
xx xx
1) Consult KSB
Duty point B does not lie at the
calculated intersections of Q and H
Pump or piping are not completely
vented or primed
Supply lines or impeller clogged - Clean the impeller
Suction head is too high
(NPSH
level is too low
Air intake at shaft seal - Clean the sealing liquid line, possibly supply
Wrong direction of rotation - Interchange two of the phases of the power
Speed is too low - Increase the speed
Wear of internal pump parts - Check duty point / pump design
in the order
Density or viscosity of medium
handled is higher than stated in the
order
Speed is too high - Reduce the speed
Tie bolts / seals and gaskets - Check
x
Shaft seal is worn - Check flushing / sealing liquid pressure
Unfavourable flow to suction nozzle of
pump
Cause Remedy
- Re-adjust the duty point
- Vent
- Check plant for impurities
- Remove deposits in pump and/or piping
- Check any strainers installed / suction opening
- Alter the piping
- Check mode of operation
available
is too low) / liquid
- Correct the suction conditions
- Increase the suction head
- Increase the back pressure by throttling
- Install pump at a lower level
- Alter the suction / intake piping, if the resistances
are too high
sealing liquid from an external source and/or
increase its pressure
- Check the liquid level in feed tank
- Replace the shaft seal
- Replace the shaft protecting sleeve
supply
- Check the electrical connections
- Check the impeller position; correct, if required
- Check the switchgear
- Fit a larger impeller
- Increase back pressure by throttling
- Check medium handled for contamination by
chemicals and the solids content
- Replace worn components
- Re-adjust the duty point
- Increase the back pressure by throttling
- Reduce the speed
- In case of permanent overloading, turn down the
impeller
- In case of permanent overloading, turn down the
impeller
- Tighten the tie bolts
- Replace the seals and gaskets
- Check pipe connections and secure fixing of the
pump; if required, improve the fixing of the piping
- Clean the sealing liquid line, possibly supply
sealing liquid from an external source and/or
increase its pressure
- Replace the shaft seal
- Replace worn components
- Replace the shaft protecting sleeve
- Alter the piping
- If required, alter the suction / inlet pipe, if the
resistances are too high
- Check the piping layout for swirl or irregular flow
profile (e.g. downstream of an elbow)
RDLO
1)
1)
)
1
)
1
Page 22 of 24
Page 23
Faults
Pump discharge pressure too low
| Pump discharge pressure too high
| | Excessive flow rate
| | | Insufficient flow rate
||||Power consumption is too high
|||||Pump does not deliver
||||||Pump interrupts delivering
|||||||Pump runs rough (noise, vibrations)
||||||||Impermissible temperature increase at pump casing / shaft seal housing
|||||||||Bearing temperature too high
||||||||||Excessive leakage at the shaft seal
|||||||||||Drive is overloaded
||||||||||||Leakage at the pump
|||||||||||||
|||||||||||||
xx
xx
xx
x
x
xxx x
xxx
x x x Defective bearings - Replace
xx
x x On star-delta starting, the motor does
x x x Impermissible air or gas content in
x x xxx
x
x x Foundation not rigid enough - Check
x x x x x Impermissible parallel operation - Re-adjust the duty point
x x Shaft run-out - Replace the shaft
xxxx
1) Consult KSB
Gland follower, seal cover (mech.
seal) have been tightened incorrectly;
wrong packing material
Lack of cooling liquid or dirty cooling
liquid chamber
Pump is warped or sympathetic
vibrations in piping
Increased axial thrust - Check the duty point / pump design
Insufficient or excessive quantity of
lubricant
Motor is running on two phases only - Replace defective fuses
Unbalance of rotor - Clean the rotor
Insufficient flow rate - Re-adjust the duty point
not succeed in reaching the delta
stage
medium pumped
Air intake at pump inlet - Correct the suction conditions
Cavitation (rattling noise) - Correct the suction conditions
Impeller rubs against casing
components
Cause Remedy
-Alter
- Replace
- Correct
- Replace the gland packing
- Replace worn components
- Check flushing / sealing liquid pressure
- Clean the sealing liquid line, possibly supply
sealing liquid from an external source and/or
increase its pressure
- Increase the cooling liquid flow rate
- Purify/clean the cooling liquid
- Re-align the pump / drive
- Check pipe connections and secure fixing of the
pump; if required, improve the fixing of the piping
- Take vibration-damping measures
- Check mode of operation
- Check suction flow
- Clean the bearing
- Top up, reduce or change lubricant
- Check the electrical cable connections
- Check the switchgear
- Check for run-out; re-align, if required
- Re-balance the rotor
- Fully open the shut-off element in the suction /
inlet pipe
- Fully open the shut-off element in the discharge
pipe
- Calculate or measure the hydraulic losses Hv
- Check the electrical cable connections
- Check the switchgear
- Vent
- Check integrity of suction pipe; seal, if required
- Reduce the flow velocity at the suction pipe inlet
- Increase the suction head
- Check integrity of suction pipe; seal, if required
- Replace defective pipes
- Check mode of operation
- Increase the suction head
- Install pump at a lower level
-Alter
- Alter the pump characteristic H
- Check the rotor
- Check the impeller position
- Check whether pipe connections are free from
stresses or strains
RDLO
1)
Page 23 of 24
Page 24
RDLO
j
ect to technical modifications1387.82/01-10 09.11.2006 OCE
Sub
KSB Aktiengesellschaft
Johann-Klein-Str. 9 • 67227 Frankenthal • Germany
Page 24 of 24
Phone: +49 6233 86-2656 • 67227 Fax: +49 6233-3412 • E-mail: info@ksb.com • www.ksb.com
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