Desmi NSL 80-215 Manual

DESMI Vertical In-Line Centrifugal Pump
OPERATION AND MAINTENANCE INSTRUCTIONS
NSL MONOBLOC & SPACER
DESMI Pumping Technology A/S
Tagholm l, DK-9400 Nørresundby, Denmark
Tel.: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.desmi.com
Manual:
T1542
Language:
English
Revision:
A.1
Special pump Number. ...............................................
Original instructions

CONTENTS
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
1E-mail: [email protected] www.desmi.com
Contents
1. GENERAL DESCRIPTION................................................................................................. 5
1.1. General................................................................................................................................................ 6
1.2. Personnel qualification and training................................................................................................ 6
1.3. EU & UK declaration of conformity.................................................................................................. 7
1.4. ATEX declaration of conformity ....................................................................................................... 8
1.4.1. Product description.................................................................................................................... 8
1.4.2. Precautions................................................................................................................................ 8
1.5. Information relevant for disassembly or disposal at end-of-life................................................... 9
2. SAFETY ........................................................................................................................... 10
2.1. Key to safety symbols/markings.................................................................................................... 10
2.1.1. Signal words ............................................................................................................................ 10
2.1.2. Hazard symbols....................................................................................................................... 10
2.1.3. Labels on the product.............................................................................................................. 11
2.2. Intended use..................................................................................................................................... 12
2.3. Consequences and risks caused by non-compliance with this manual.................................... 13
2.4. Safety awareness............................................................................................................................. 13
2.5. Safety information for the operator/user....................................................................................... 13
2.6. Safety information for maintenance, inspection and installation............................................... 14
2.7. Unauthorised modes of operation ................................................................................................. 14
2.8. Explosion protection ....................................................................................................................... 14
2.8.1. Marking.................................................................................................................................... 15
2.8.2. Temperature limits................................................................................................................... 15
2.8.3. Monitoring equipment.............................................................................................................. 15
2.8.4. Operating limits........................................................................................................................ 15
2.9. Frost protection................................................................................................................................ 16
3. TRANSPORTATION, PREVENTATION AND TEMPORARY STORAGE ........................ 17
3.1. Checking the condition upon delivery........................................................................................... 17
3.2. Transport .......................................................................................................................................... 17
3.3. Storage/Preservation....................................................................................................................... 19
3.4. Return to supplier ............................................................................................................................ 19
3.5. Disposal ............................................................................................................................................ 20
4. TECHNICAL SPECIFICATION......................................................................................... 21
4.1. Work range ....................................................................................................................................... 21
4.2. Technical data .................................................................................................................................. 24
4.2.1. Maximum work pressure ......................................................................................................... 24
4.2.2. Noise emission ........................................................................................................................ 25

CONTENTS
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 2
4.2.3. Generated vibration..................................................................................................................26
4.2.4. Hydraulic capacity....................................................................................................................26
4.2.5. Allowed maximum motor frame size........................................................................................26
4.3. Name plate ........................................................................................................................................27
4.3.1. Explanation of the type.............................................................................................................27
4.3.2. Explanation of the type number and pump number.................................................................29
4.3.3. Explanation of pump performance...........................................................................................29
4.4. Dimensional drawing .......................................................................................................................30
4.4.1. NSL-215/265 -02 combination .................................................................................................30
4.4.2. NSL-215/265 -12 combination .................................................................................................31
4.4.3. NSL-215/265 -13/14 combinations ..........................................................................................32
4.4.4. NSL-330/415/418/465/525 -02 combination............................................................................33
4.4.5. NSL-330/415/418/465/525 -12 combination............................................................................35
4.4.6. NSL-330/415/418/465/525 -13/14 combinations .....................................................................37
4.5. Pump weight .....................................................................................................................................39
5. INSTALLATION................................................................................................................ 41
5.1. Mounting / Fastening .......................................................................................................................41
5.2. Wiring.................................................................................................................................................41
6. COMMISSIONING, START-UP AND SHUTDOWN..........................................................50
6.1. Prerequisites for commissioning / start-up...................................................................................50
6.2. Priming and venting the pump........................................................................................................50
6.3. Start up..............................................................................................................................................53
6.3.1. Start-up procedure ...................................................................................................................54
6.4. Checking the shaft seal ...................................................................................................................55
6.5. Shut down .........................................................................................................................................55
6.6. Operating limits ................................................................................................................................56
6.7. Frequency of starts ..........................................................................................................................57
6.8. Fluid handled ....................................................................................................................................57
6.8.1. Flow rate ..................................................................................................................................57
6.8.2. Density of fluid handled............................................................................................................58
6.8.3. Abrasive fluids..........................................................................................................................58
6.9. Decommissioning / out of service..................................................................................................58
6.10. Return to service ..............................................................................................................................59
7. TROUBLESHOOTING...................................................................................................... 60
7.1. Mechanical seal failure analysis.....................................................................................................61
8. INSPECTION AND SERVICE PLAN ................................................................................ 66
8.1. Supervision of operation .................................................................................................................66
8.2. Inspection work ................................................................................................................................73

CONTENTS
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
3E-mail: [email protected] www.desmi.com
8.2.1. Cleaning filter........................................................................................................................... 74
8.2.2. Drainage and cleaning............................................................................................................. 74
9. DISMANTLING THE PUMP SET...................................................................................... 75
9.1. 02 and 12 combinations .................................................................................................................. 77
9.1.1. Access to impeller.................................................................................................................... 77
9.1.2. Dismantling shaft seal.............................................................................................................. 83
9.1.3. Dismantling seat...................................................................................................................... 86
9.1.4. Dismantling bearing (only 02 combination) ............................................................................. 86
9.1.5. Inspection ................................................................................................................................ 87
9.1.6. Dismantling coupling (02 combination) / shaft (12 combination)............................................. 87
9.2. 13 and 14 combinations .................................................................................................................. 88
9.2.1. Access to impeller.................................................................................................................... 88
9.2.2. Dismantling shaft seal.............................................................................................................. 91
9.2.3. Dismantling seat...................................................................................................................... 94
9.2.4. Dismantling shaft with bearings............................................................................................... 94
9.2.5. Inspection ................................................................................................................................ 94
10. ASSEMBLING THE PUMP SET....................................................................................... 95
10.1. 12 combination................................................................................................................................. 95
10.1.1. Fitting sealing rings.................................................................................................................. 95
10.1.2. Fitting shaft seal....................................................................................................................... 96
10.1.3. Fitting impeller ......................................................................................................................... 97
10.1.4. Fitting rear cover or motor bracket .......................................................................................... 99
10.1.5. Shaft ...................................................................................................................................... 100
10.2. 02, 13 and 14 combinations .......................................................................................................... 101
10.2.1. Fitting sealing rings................................................................................................................ 101
10.2.2. Fitting bearings or shaft with bearings................................................................................... 102
10.2.3. Fitting water deflector ............................................................................................................ 103
10.2.4. Fitting shaft seal..................................................................................................................... 104
10.2.5. Fitting impeller ....................................................................................................................... 105
10.2.6. Fitting bearing housing and rear cover.................................................................................. 106
10.2.7. Shaft ...................................................................................................................................... 107
10.2.8. Fitting coupling....................................................................................................................... 108
11. ORDERING SPARE PARTS .......................................................................................... 113
11.1. Assembly drawing NSL-215/265 -02 combination...................................................................... 115
11.2. Spare parts list NSL-215/265 -02 combination............................................................................ 116
11.3. Assembly drawing NSL-215/265 -12 combination...................................................................... 117
11.4. Spare parts list NSL-215/265 -12 combination............................................................................ 118
11.5. Assembly drawing NSL-215/265 -S12 combination.................................................................... 119
11.6. Spare parts list NSL-215/265 -S12 combination ......................................................................... 120
11.7. Assembly drawing NSL-330/415/465 -02 combination............................................................... 121

CONTENTS
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 4
11.8. Spare parts list NSL-330/415/465 -02 combination .....................................................................122
11.9. Assembly drawing NSL-330/415/465 -12 combination ...............................................................123
11.10.Spare parts list NSL-330/415/465 -12 combination .....................................................................124
11.11.Assembly drawing NSL300-418 -02 combination .......................................................................125
11.12.Spare parts list NSL300-418 -02 combination .............................................................................126
11.13.Assembly drawing NSL300-418 -12 combination .......................................................................127
11.14.Spare parts list NSL300-418 -12 combination .............................................................................128
11.15.Assembly drawing NSL200/250/300-525 -02 combination .........................................................129
11.16.Spare parts list NSL200/250/300-525 -02 combination ...............................................................130
11.17.Assembly drawing NSL200/250/300-525 -12 combination .........................................................131
11.18.Spare parts list NSL200/250/300-525 -12 combination ...............................................................132
11.19.Assembly drawing NSL350-525 -02 combination .......................................................................133
11.20.Spare parts list NSL350-525 -02 combination .............................................................................134
11.21.Assembly drawing NSL350-525 -12 combination .......................................................................135
11.22.Spare parts list NSL350-525 -12 combination .............................................................................136
11.23.Assembly drawing NSL-215/265 -14 combination ......................................................................137
11.24.Spare parts list NSL-215/265 -14 combination ............................................................................138
11.25.Assembly drawing NSL-330/415/465 -14 combination ...............................................................139
11.26.Spare parts list NSL-330/415/465 -14 combination .....................................................................140
11.27.Assembly drawing NSL300-418 -14 combination .......................................................................141
11.28.Spare parts list NSL300-418 -14 combination .............................................................................142
11.29.Assembly drawing NSL200/250/300-525 -14 combination .........................................................143
11.30.Spare parts list NSL200/250/300-525 -14 combination ...............................................................144
11.31.Assembly drawing NSL350-525 -14 combination .......................................................................145
11.32.Spare parts list NSL350-525 -14 combination .............................................................................146
APPENDIX A ........................................................................................................................... 147
APPENDIX B ........................................................................................................................... 149

GENERAL DESCRIPTION
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
5E-mail: [email protected] www.desmi.com
1. GENERAL DESCRIPTION
These operation and maintenance instructions apply to both DESMI NSL pumps in Monobloc and
Spacer design. After the publish of this manual, the original manual will no longer apply to the
products for subsequent shipments. But the original manual still applies to the past or in-use
products. Desmi reserves the right to make any type of update, without prior notice and obligation
to update previous manuals. The latest version of the manual is acquirable by scanning the QR
code in the front page of this manual.
The pump is particularly suitable for the pumping of water in connection with cooling systems,
cooling of diesel engines, as bilge pumps, ballast pumps, fire pumps, brine pumps, pumps for
irrigation, fish farms, water works, district heating, salvage corps, army and navy, etc.
The pump is a single-stage vertical "in-line" centrifugal pump (i.e. horizontal inlet and outlet on the
same line) equipped with stainless steel shaft, mechanical shaft seal, and closed impeller.
The pump shaft, with or without ball bearing mounted on it, is coupled with electric motor shaft
either by rigid coupling or by flexible coupling.
The pump suction and discharge ports are casted flanges which comply with European Union
flange standards as well as other compatible flange standards , e.g., ASME, ISO and JIS
standards.
The pump has various options and combinations for the wet part material to fulfil desired
applications. The options and combinations include cast iron, copper alloy and stainless steel in
different grades.
The pump couples with electric motors that comply with IEC or NEMA standards. The pump can
also be customized to couple with other kinds of engines, e.g. hydraulic motor, diesel engine,
which is special engineering to order products and specific operation and maintenance instructions
are applied.
The operation and maintenance instructions include descriptions for two product groups based on
their different designs, ø215/265 and ø330/415/418/525. The numbers refer to the standard
impeller diameter of the pump.
Ø215/265: Pumps with ø215 or ø265 impellers:
The impeller is equipped with one sealing ring. The line through inlet and outlet is flush with the
center line of the shaft.
Ø330/415/418/465/525: Pumps with ø330, ø415, ø418, ø465 or ø525 impellers:
The impeller is equipped with two sealing rings. The line through inlet and outlet is offset in relation

GENERAL DESCRIPTION
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 6
to the center line of the shaft. Pumps delivered by us connected with prime movers are CE-marked
and comply with the above requirements.
1.1. General
This manual contains general installation, operation 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 specialist personnel /operators responsible, prior to
installation and commissioning.
The content 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
•Marking for connections
•Name plate
The operator is responsible for ensuring compliance with all local regulations not taken into
account in this manual.
1.2. Personnel qualification and 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 means of training and instruction provided by sufficiently
trained specialist personnel. If required, the operator can commission the manufacturer / supplier
to train the personnel. Training on the pump (set) must always be supervised by technical
specialist personnel.

GENERAL DESCRIPTION
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
7E-mail: [email protected] www.desmi.com
1.3. EU&UKdeclaration of conformity
DESMI PUMPING TECHNOLOGY A/S, hereby declare that our pumps of NSL Monobloc &
Spacer type are manufactured in conformity with the following essential safety and health
requirements in the COUNCIL DIRECTIVE 2006/42/EC on machines, Annex 1.
The following harmonized standards have been used:
EN/ISO 13857:2008
Safety of machinery. Safety distances to prevent danger zones
being reached by the upper limbs
EN 809:1998 + A1:2009
Pumps and pump units for liquids –Common safety
requirements
EN12162:2001+A1:2009
Liquid pumps –Safety requirements –Procedure for hydrostatic
testing
EN 60204-1:2006/A1:2009
Safety of machinery –Electrical equipment of machines (item 4,
General requirements)
Ecodesign Directive
(2009/125/EC).
Water pumps: Commission Regulation No 547/2012.
Applies only to water pumps marked with the minimum efficiency
index MEI. See pump nameplate
Directive 2014/34/EU
Equipment and protective systems intended for use in potentially
explosive atmospheres.
Applies only to water pumps marked with Ex. See pump
nameplate
Pumps delivered by us connected with prime movers are CE-marked and comply with the above
requirements.
Pumps delivered by us without prime movers (as partly completed machinery) must only be used
when the prime mover and the connection between prime mover and pump comply with the above
requirements.
Nørresundby, August 25 2022
Henrik Mørkholt Sørensen
Managing Director
DESMI Pumping Technology A/S
Tagholm 1, 9400 Nørresundby

GENERAL DESCRIPTION
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 8
1.4. ATEX declaration of conformity
1.4.1. Product description
The precautions to be taken using the pumps in areas where the ATEX rules for “Ex II 2G Ex h IIb
T4 Gb X” marked equipment apply. Only pumps mounted with EX-marked nameplate from DESMI
are approved for / allowed to be used in EX areas.
The pumps have been examined according to EN80079-36:2016 and EN80079-37:2016.
Constructional safety “c” and an Ignition Hazard Assessment has been made. As a result of this
assessment the following precautions are to be taken.
1.4.2. Precautions
NOTE: Dry run is not allowed. Fill pump with liquid before start up. A cos  measuring device
can be fitted to the power circuit and set to trip the drive power in case of the power
consumption being too low. The liquid in the pump also serves as coolant for the shaft seal. Dry
run will result in frictional heat being developed causing critical high temperatures at seal faces.
NOTE: Pumping against closed outlet valve is not allowed for more than 2 minutes. A pressure
switch can be fitted to trip the drive power in case of the outlet pressure being too high.
NOTE: Choking or clogging of the pump can result in either too low load or overload of the
motor or bending of the shaft. Use a strainer / filter in the suction pipe. A cos  measuring
device can be fitted to the power circuit and set to trip the drive power in case of power
consumption being too low or too high. The termistors (if any) in the electric motor can only be
used to trip the drive power at overload.
NOTE: User must replenish grease according to instruction manuals and replace bearings after
90% of rated life i.e. 22500 hours. The bearing housing is fitted with a temperature sensor (or
two in Spacer pumps) to be connected to the electrical control system on site. Set the system to
trip the drive power 10°C above normal operating temperature.

GENERAL DESCRIPTION
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
9E-mail: [email protected] www.desmi.com
NOTE: Max. allowed liquid temperature is 80°C for fresh water and most likely less for other
liquids. The pump housing can be fitted with a temperature sensor to be connected to the
electrical control system on site and then set this to trip the drive power 10°C above normal
operating temperature. Contact DESMI in case of doubt about max. allowed liquid temperature.
Nørresundby, August 25 2022
Henrik Mørkholt Sørensen
Managing Director
DESMI Pumping Technology A/S
Tagholm 1, 9400 Nørresundby
1.5. Informationrelevantfordisassemblyordisposalatend-of-life
No harmful materials are used in DESMI pumps –please refer to DESMI Green Passport (can be
sent on request –contact a DESMI sales office) –i.e. common recycling companies can handle
the disposal at end-of-life. Alternatively the pump and motor can be returned to DESMI at end-of-
life for safe recycling.

SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 10
2. SAFETY
All the information contained in this section refers to hazardous situations.
2.1. Key to safety symbols/markings
2.1.1. Signal words
The following signal words and symbols are used to identify safety messages in these instructions:
DANGER
DANGER indicates a hazard with a high level of risk which, if not
avoided, will result in death or serious injury.
WARNING
WARNING indicates a hazard with a medium level of risk which, if
not avoided, could result in death or serious injury.
CAUTION
CAUTION indicates a hazard with a low level of risk which, if not
avoided, could result in damage to the product or system.
Information with this heading is used to address practices not related to personal injury.
2.1.2. Hazard symbols
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.
Explosion protection
This symbol identifies information about avoiding explosions in potentially explosive
atmospheres in accordance with EC Directive 2014/34/EU (ATEX).
Machine damage
In conjunction with the signal word CAUTION, this symbol indicates a hazard for the
machine and its functions.

SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
11 E-mail: [email protected] www.desmi.com
2.1.3. Labels on the product
The diagrams below indicate the location of the machine's safety and information labels.

SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 12
2.2. Intended use
•The pump (set) must only be operated within the operating limits described in the other
applicable documents.
•Only operate pumps / pump sets which are in perfect technical condition.
•Do not operate the pump (set) in partially assembled condition.
•Only use the pump to handle the fluids described in the order or product literature of the pump
model or variant.
•Never operate the pump without the fluid to be handled.
•Observe the information on minimum flow rates specified in the product literature (to prevent
overheating, bearing damage, etc.).
•Observe the information on maximum flow rates specified in the 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 (to prevent cavitation damage).
•Consult the manufacturer about any other modes of operation not described in the product
literature.
Prevention of foreseeable misuse
•Never open the discharge-side shut-off elements further than permitted.
- The maximum flow rate specified in the technical product literature would be exceeded.
- Risk of cavitation damage
•Never exceed the permissible operating limits (pressure, temperature, etc.) specified in the
product literature.
•Observe all safety information and instructions in this manual.

SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
13 E-mail: [email protected] www.desmi.com
2.3. Consequences and risks caused by non-compliance with this
manual
•Non-compliance with this manual 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.
2.4. 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, directives and laws
2.5. 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.
•Do not remove any contact guards during operation.
•Provide the personnel with protective equipment and make sure it is used.
•Contain leakages (e.g. at the shaft seal) of hazardous fluids handled (e.g. explosive, toxic, hot)
so as to avoid any danger to persons and the environment. Adhere to all relevant laws.
•Eliminate all electrical hazards. (In this respect, refer to 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.

SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 14
2.6. Safety information for maintenance, inspection and installation
•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 maintenance, inspection and installation is performed by authorised,
qualified specialist personnel who are thoroughly familiar with the manual.
•Only carry out work on the pump (set) during standstill of the pump.
•The pump casing must be cooled down to ambient temperature.
•Pump pressure must be 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.
2.7. Unauthorised modes of operation
Never operate the pump (set) outside the limits stated in the order documentation 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.
2.8. Explosion protection
Always observe the information on explosion protection given in this section when operating the
product in potentially explosive atmospheres. Only pumps/pump sets marked as explosion-proof
and identified as such in the data sheet may be used in potentially explosive atmospheres.
Special conditions apply to the operation of explosion-proof pump sets to EU Directive 2014/34/EU
(ATEX). Especially adhere to the sections in this manual marked with the Ex symbol and the
following sections.
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.

SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
15 E-mail: [email protected] www.desmi.com
2.8.1. Marking
The marking on the pump refers to the pump part only. DESMI’s standard EX marking for NSL
pumps is: Ex II 2G Ex h IIb T4 Gb X.
The motor has its own marking. The marking is maintained on the condition that the temperatures
the pump causes to develop at the motor flange and motor shaft are permitted by the motor
manufacturer. The motors used DESMI on pumps with ATEX certification meet this condition.
2.8.2. Temperature limits
In normal pump operation, the highest temperatures are to be expected on the surface of the
pump casing and at the shaft seal. The surface temperature at the pump casing corresponds to
the temperature of the fluid handled. If the pump is heated in addition, the operator of the system
is responsible for observing the specified temperature class and fluid temperature (operating
temperature). The max. allowed liquid temperature is 80°C for fresh water and most likely less for
other liquids.
If the pump is to be operated at a higher temperature or if the pump is part of a pool of pumps,
contact DESMI for the maximum permissible operating temperature.
If a pump is supplied without motor (as part of a pool of pumps), the motor specified in the order
documentation of the pump must meet the following conditions:
•The permissible temperature limits at the motor flange and motor shaft must be higher than the
temperatures generated by the pump.
•Contact the manufacturer for the actual pump temperatures.
2.8.3. Monitoring equipment
The pump (set) must only be operated within the limits specified in the order documentation and
on the name plate. If the system operator cannot warrant compliance with these operating limits,
appropriate monitoring devices must be used. Check whether monitoring equipment is required to
ensure that the pump set functions properly.
Contact DESMI for further information on monitoring equipment.
2.8.4. Operating limits
Refer to the chapter 1.4 –i.e. if there’s a risk of too high liquid temperatures, then a PT100 sensor
should be mounted in the pump casing. As standard the max. allowed liquid temperature is 80°C
for ATEX marked NSL pumps.

SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 16
2.9. Frost protection
Pumps which are not in operation during frost periods are to be drained to avoid frost damage.
Remove the plug (3) at the bottom to empty the pump. Alternatively, it is possible to use anti-
freeze liquids in normal pump configurations.

TRANSPORTATION, PREVENTATION AND TEMPORARY STORAGE
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
17 E-mail: [email protected] www.desmi.com
3. TRANSPORTATION, PREVENTATION AND TEMPORARY
STORAGE
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 DESMI or
the supplying dealer (as applicable) and the insurer about the damage in writing immediately.
3.2. Transport
.
DANGER
FALLING OBJECT HAZARD!
The pump (set) could slip out of the suspension arrangement, which will cause death or
serious injury
Always transport the pump (set) in the specified position.
Do not attach the suspension arrangement to the free shaft end or the motor eyebolt.
Monitor the weight data and the centre of gravity.
Obey the applicable local health and safety regulations.
Use suitable, permitted lifting accessories, for example, self-tightening lifting tongs.
CAUTION
RISK OF DAMAGING TO THE SHAFT SEAL!
Transport the pump incorrectly could cause damage to the shaft seal!
To transport the pump / pump set from the lifting, tackle as shown below.
Before shipment, fasten the pump securely on pallets or the like.
The weights of the pumps are given in chapter 4.5. The weight of the motor is given in motor
operation manual. It can be found in
- Shipping documents together with the cargo
- Shipping mark on cargo box
- Other documents for the shipment, contracts or orders, etc.

TRANSPORTATION, PREVENTATION AND TEMPORARY STORAGE
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby –Denmark
Tlf. nr.: [phone]
Fax [phone]
E-mail: [email protected] www.desmi.com 18
Figure 3-1: Transport
NOTE: The lifting straps must not bear against sharp edges and corners.