Allweiler NAM-F Series User manual

Centrifugal Pump with
Volute Casing
Operating manual NAM-F series
Version BA-2006.03
Print-No. 550 342
VM-No. 467.0006 GB
ALLWEILER AG • Werk Radolfzell
Postfach 1140
Allweilerstr. 1
78301 Radolfzell
Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: http://www.allweiler.com
We reserve the right to make technical changes.

Table of contents
Table of contents
1 About this document ............................... 4
1.1 Target groups ..... . ......... . .. .. .. . .. .. . .. .. . 4
1.2 Other applicable documents ..... . .. .. . .. .. . 4
1.3 Warnings and symbols ....................... 5
1.4 Technical terms ............................... 5
2 Safety ................................................. 6
2.1 Intended use ...... . .. .. . .. .. . .. .. .. . .. .. . .. .. . 6
2.2 General safety instructions .................. 6
2.2.1 Product safety .... . .. .. . .. .. . .. .. .. . .. .. . .. .. . 6
2.2.2 Obligations of the operating company . .. .. . 7
2.2.3 Duties of the personnel .. ..... .. .. . .. .. . .. .. . 7
3 Layout and function ................................ 8
3.1 Labels . .. . .. .. . .. .. . .. .. . .. .. . .. .. .. . .. .. . .. .. . 8
3.1.1 Type plate ..................................... 8
3.1.2 Pump type code .............................. 8
3.2 Layout ......................................... 9
3.3 Shaft seal ..................................... 9
3.3.1 Single mechanical seal ...................... 9
3.4 Auxiliary systems ............................. 9
3.4.1 Automatic aspirator (if available) .. .. .. . .. .. . 9
4 Transport, storage and disposal .................. 10
4.1 Transport ...................................... 10
4.1.1 Unpacking and inspection on delivery . .. .. . 10
4.1.2 Lifting .......................................... 10
4.2 Preservation .................................. 10
4.3 Storage ....................................... 10
4.4 Removing the preservative ................. 11
5 Setup and connection .............................. 12
5.1 Preparing the setup ........ . .. .. .. . .. .. . .. .. . 12
5.1.1 Checking the ambient conditions .......... . 12
5.1.2 Preparing the installation site .. .. . .. .. . .. .. . 12
5.1.3 Removing the preservative ................. 12
5.1.4 Fastening the pump .......................... 12
5.2 Installing the motor ........................... 12
5.3 Planning the piping ........................... 12
5.3.1 Keeping the piping clean .. . .. .... . .. .. . .. .. . 12
5.3.2 Specifying supports and flange
connections .. . .. .. . .. .. . .. .. . .. .. .. . .. .. . .. .. . 12
5.3.3 Specifying nominal diameters .... . .. .. . .. .. . 13
5.3.4 Specifying pipe lengths .. .. . ...... . .. .. . .. .. . 13
5.3.6 Optimizing cross-section and direction
changes .. .. .. . .. .. . .. .. . .. .. . .. .. .. . .. .. . .. .. . 13
5.3.7 Provide safety and control devices
(recommended) ....... . .. .. . .. .. .. . .. .. . .. .. . 13
5.4 Connecting the pipes . . .. .. . .. .. .. . .. .. . .. .. . 14
5.4.1 Installing auxiliary pipes (if available) .. .. .. . 14
5.4.2 Installing the suction pipe .................... 14
5.4.3 Installing the pressure pipe .................. 14
5.4.4 Inspection for stress-free pipe
connections ................................... 14
5.5 Electrical connection . .. . .. .. . .. .. . .. .. . .. .. .. 14
5.5.1 Connecting the motor .. . .. .. . .. .. . .. .. . .. .. .. 14
5.5.2 Checking the direction of rotation .... . .. .. .. 14
5.6 Checking the alignment of the
coupling ....................................... 15
6Operation ............................................ 16
6.1 Preparations for the initial start-up . .. . .. .. .. 16
6.1.1 Identifying the pump type ... . .. .. . .. .. . .. .. .. 16
6.1.2 Removing the preservative ................. 16
6.1.3 Lubricating the bearings .... . .. .. . .. .. . .. .... 16
6.1.4 Preparing auxiliary systems (if
available) ..................................... 16
6.1.5 Filling and bleeding .... . .. .. . .. .. . .. .. . .. .. .. 16
6.2 Start-up ....................................... 16
6.2.1 Switching on .................................. 16
6.2.2 Switching off .................................. 17
6.3 Shutting down ................................ 17
6.4 Start-up following a shutdown period . .... .. 18
6.5 Operating the stand-by pump . .. . .. .. . .. .. .. 18
7 Maintenance ......................................... 19
7.1 Inspections ................................... 19
7.2 Maintenance ... .. . .. .. .. . .. .. . .. .. . .. .. . .. .. .. 19
7.2.1 Antifriction bearings lubricated with
grease ......................................... 19
7.2.2 Mechanical seals ............................. 19
7.3 Dismounting ... .. . .. .. .. . .. .. . .. .. . .... . .. .. .. 20
7.3.1 Returning the pump to the manufac-
turer ........................................... 20
7.3.2 Preparations for dismounting .... . .. .. . .. .. .. 20
7.4 Installing ...................................... 21
7.5 Ordering spare parts ......................... 21
8 Troubleshooting .................................... 22
9 Appendix ............................................. 25
9.1 Sectional drawings . .. .. . .. .. . .. .. . .. .. . .. .. .. 25
9.1.1 Auxiliary connections ........................ 25
9.1.2 Part numbers and designations . . .. .. . .. .. .. 25
9.1.3 NAM-F series sectional drawings .... . .. .. .. 27
9.2 Technical specifications ...................... 29
9.2.1 Ambient conditions ........................... 29
9.2.2 Preservatives ................................. 29
9.2.3 Sound pressure levels . . .. .. . .. .. . .. .. . .. .. .. 29
9.2.4 Tightening torques ........................... 30
9.2.5 Cleaning agents . . .. .. .. . .. .. . .... . .. .. . .. .. .. 30
9.2.6 Lubricants ... . .. .. . .. .. .. . .. .. . .. .. . .. .. . .. .. .. 30
9.3 Recommended spare parts . .. .. . .. .. . .. .. .. 31
2 NAM-F series BA-2006.03 467.0006 GB – 550 342

Table of contents
List of figures
Fig. 1 Type plate (example) ........................ 8
Fig. 2 Pump type code (example) .................. 8
Fig. 3 NAM-F layout ................................. 9
Fig. 4 Automatic aspirator – extension
example ....................................... 9
Fig. 5 Fastening the lifting gear to the pump
aggregate ..................................... 10
Fig. 6 Straight pipe lengths upstream and down-
stream of the pump (recommended) ...... . 13
Fig. 7 Checking the lateral displacement .. . .. .. .. . 15
Fig. 8 Checking the angular displacement . .. .. .. . 15
Fig. 9 U3...D Unbalanced mechanical seal Base
installation .................................... 27
Fig. 10 Wall attachment version ..................... 28
Fig. 11 Attachment of the pump feet to the bell
housing ....................................... 28
Fig. 12 Bearing and impeller retention version for
bearing bracket size 530 .................... 28
List of tables
Tab. 1 Target groups and their duties .. . .. .. . .. .. . . 4
Tab. 2 Other applicable documents and their
purpose ....................................... 4
Tab. 3 Warnings and consequences of disregarding
them ........................................... 5
Tab. 4 Symbols and their meaning . ......... ... .. . . 5
Tab. 5 Technical terms and their meaning .. . .. .. . . 5
Tab. 6 Measures to be taken if the pump is shut
down .......................................... 17
Tab. 7 Measures depending on the behavior of the
pumped medium ............................. 17
Tab. 8 Measures to be taken after prolonged
shutdown periods ............................ 18
Tab. 9 Measures for return .......................... 20
Tab. 10 Fault number assignment ... .. .. . .. .. . .. .. . . 22
Tab. 11 Troubleshooting list ....... . .. .. .. . .. .. . .. .. . . 24
Tab. 12 Abbreviations of the connection
designations .................................. 25
Tab. 13 Designations of components according to
part numbers ................................. 26
Tab. 14 Ambient conditions ........................... 29
Tab. 15 Valvoline preservatives ...................... 29
Tab. 16 Sound pressure levels .... . .. .. .. . .. .. . .. .. . . 29
Tab. 17 Tightening torques ... . .. .. . .... .. . .. .. . .. .. . . 30
Tab. 18 Cleaning agents . . .. .. . .. .. . .. .. .. . .. .. . .. .. . . 30
Tab. 19 Grease types ................................. 30
Tab. 20 Minimum amounts for grease lubrica-
tion ............................................ 30
Tab. 21 Recommended spare parts ... .. . .. .. . .. .. . . 31
467.0006 GB – 550 342 BA-2006.03 NAM-F series 3

About this document
1 About this document
This manual
• Is part of the pump
• Applies to the afore-mentioned pump series
• Describes safe and appropriate operation during all oper-
ating phases
1.1 Target groups
Target group Duty
Operating company Keep this manual available at the site of operation of the system,
including for later use.
Ensure that personnel read and follow the instructions in this
manual and the other applicable documents, especially all safety
instructions and warnings.
Observe any additional rules and regulations referring to the
system.
Qualified personnel, fitter Read, observe and follow this manual and the other applicable
documents, especially all safety instructions and warnings.
Tab. 1 Target groups and their duties
1.2 Other applicable documents
Document Purpose
Order data sheet Technical specifications, conditions of operation
Setup drawing Setup dimensions, connection dimensions etc.
Technical description Technical specifications, operating limits
Sectional drawing Sectional drawing, part numbers, component designations
Automatic aspirator operating manual Technical documentation
Supplier documentation Technical documentation for parts supplied by subcontractors
Spare parts list Ordering spare parts
Safety certificate Returning the pump to the manufacturer
Declaration of conformity Conformity of the pump with standards
Tab. 2 Other applicable documents and their purpose
4 NAM-F series BA-2006.03 467.0006 GB – 550 342

About this document
1.3 Warnings and symbols
Warning Risk level Consequences of disregard
DANGER Immediate acute risk Death, grievous bodily harm
WARNING Potentially acute risk Death, grievous bodily harm
CAUTION Potentially hazardous situation Minor bodily harm
CAUTION Potentially hazardous situation Material damage
Tab. 3 Warnings and consequences of disregarding them
Symbol Meaning
Safety warning sign
Take note of all information highlighted by the safety warning sign
and follow the instructions to avoid injury or death.
Instruction
1. , 2. , ... Multiple-step instructions
9Precondition
→Cross reference
Information, advice
Tab. 4 Symbols and their meaning
1.4 Technical terms
Term M eaning
Auxiliary systems Systems for operating the pump
Tab. 5 Technical terms and their meaning
467.0006 GB – 550 342 BA-2006.03 NAM-F series 5

Safety
2 Safety
The manufacturer does not accept any liability for damage
resulting from disregard of the entire documentation.
2.1 Intended use
• Only use the pump for pumping the agreed pumped media
(→order data sheet).
• Adhere to the operating limits and size-dependent mini-
mum flow rate.
• Avoid dry running:
Initial damage, such as destruction of the mechanical seal
and plastic parts, will occur within only a few seconds.
– Make sure the pump is only operated with, and never
without, a pumped medium.
• Avoid cavitation:
– Fully open the suction-side armature and do not use it
to adjust the flow rate.
– Do not open the pressure-side armature beyond the
agreed operating point.
• Avoid overheating:
– Do not operate the pump while the pressure-side arma-
ture is closed.
– Observe the minimum flow rate (→order data sheet).
• Avoid damage to the motor:
– Do not open the pressure-side armature beyond the
agreed operating point.
– Note the maximum permissible number of times the
motor can be switched on per hour (→manufacturer's
specifications).
• Consult the manufacturer about any other use of the pump.
Prevention of obvious misuse (examples)
• Note the operating limits of the pump concerning temper-
ature, pressure, flow rate and motor speed (→order data
sheet).
• The power consumed by the pump will increase with
increasing density of the pumped medium. To avoid
overloading the pump, coupling or motor, stay within the
agreed density (→order data sheet).
Lower densities are allowed. Adapt the auxiliary systems
accordingly.
• When pumping liquids containing solids, ensure that the
limits for the proportion of solids and the grain size are
maintained (→order data sheet, technical description).
• When using auxiliary systems, ensure that there is a con-
tinuous supply of the appropriate medium.
2.2 General safety instructions
Take note of the following regulations before carrying out
any work.
2.2.1 Product safety
The pump has been constructed according to the latest tech-
nology and recognized technical safety rules. Nevertheless,
operation of the pump can involve risks to life and health of the
user or third parties and risk of damage to the pump and other
property.
• Only operate the pump if it is in perfect technical condition
and only use it as intended, staying aware of safety and
risks, and in adherence to the instructions in this manual.
• Keep this manual and all other applicable documents com-
plete, legible and accessible to personnel at all times.
• Refrain from any procedures and actions that would
expose personnel or third parties to any risk.
• Should there be any safety-relevant fault, shut down the
pump immediately and have the fault corrected by appro-
priate personnel.
• In addition to the entire documentation for the product,
always comply with statutory or other safety and accident-
prevention regulations and with the applicable standards
and guidelines in the country where the pump is operated.
6 NAM-F series BA-2006.03 467.0006 GB – 550 342

Safety
2.2.2 Obligations of the operating company
Safety-conscious operation
• Only operate the pump if it is in perfect technical condition
and only use it as intended, staying aware of safety and
risks, and in adherence to the instructions in this manual.
• Ensure that the following safety aspects are observed and
monitored:
– Adherence to intended use
– Statutory or other safety and accident-prevention reg-
ulations
– Safety regulations governing the handling of hazard-
ous substances
– Applicable standards and guidelines in the country
where the pump is operated
• Make protective equipment available.
Qualified personnel
• Make sure all personnel tasked with work on the pump
have read and understood this manual and all other appli-
cable documents, especially the safety, maintenance and
repair information, before they start work.
• Organize responsibilities, who is in charge of any specific
duty and how personnel is supervised.
• Ensure that all work is carried out by specialist technicians
only:
– Fitting, repair and maintenance work
– Work on the electrical system
• Make sure trainee personnel is supervised by a specialist
technician when working on the pump.
Safety equipment
• Provide the following safety equipment and verify their
functionality:
– For hot, cold and moving parts: guard provided by the
customer to prevent contact with the pump
– For possible build up of electrostatic charge: ensure
appropriate grounding
Warranty
• Obtain the manufacturer's approval prior to carrying out
any modifications, repairs or alterations during the warranty
period.
• Only use original parts or parts that have been approved
by the manufacturer.
2.2.3 Duties of the personnel
• All directions given on the pump must be followed (and kept
legible), e.g. the arrow indicating the direction of rotation
and the markings for fluid connections.
• Do not remove the guards to prevent contact with hot, cold
or moving parts during operation.
• Use protective equipment if necessary.
• Only carry out work on the pump while it is not running.
• Isolate the motor from its supply voltage and keep it locked
in that state when carrying out any fitting or maintenance
work.
• Reinstall the safety equipment on the pump as required by
regulations after any work on the pump.
467.0006 GB – 550 342 BA-2006.03 NAM-F series 7

Layout and function
3 Layout and function
3.1 Labels
3.1.1 Type plate
NPSHkW1/min P mn
m
3
/h H mQ
Nr Jahr
Typ
mm
2
/skg/dm
3
D - 78315 Radolfzell / Germany
Typ und Nr.
1
2
3
4
56
7
10
9
8
angeben
Bei Ersatzteilbestellung
Fig. 1 Type plate (example)
1Pumptype
2 Year of manufacture
3 Differential head
4 Pump NPSH value
5 Kinematic viscosity
6 Power consumption
7 Density
8 Motor speed
9Flowrate
10 Serial number
3.1.2 Pump type code
1
2
3
4
NAM-F 80 – 315
/ U3.1D – 11 W133
5
6
/ 310
7
Fig. 2 Pump type code (example)
1Series
2Pressureflange DN [mm]
3 Nominal impeller diameter [mm]
4 Hydraulic no.
5 Actualimpellerdiameter[mm]
6 Shaft seal
7 Material key
8 NAM-F series BA-2006.03 467.0006 GB – 550 342

Layout and function
3.2 Layout
1
2
3
4
5
6
7
8
Fig. 3 NAM-F layout
1Motor
2 Coupling with extension piece
3 Bell housing
4 Shaft
5 Bearing bracket
6 Shaft seal
7Impeller
8 Volute casing
3.3 Shaft seal
3.3.1 Single mechanical seal
Mechanical seals have functional leaks.
3.4 Auxiliary systems
3.4.1 Automatic aspirator (if available)
Information on the material, functional description and
electrical connection (→A25 automatic aspirator operat-
ing manual).
1
Fig. 4 Automatic aspirator – extension example
1 Automatic aspirator
The maintenance-free A25 automatic aspirator:
• Used for automatic bleeding of pumps and suction pipes
• Operates according to the ejector principle with pressure-
dependent control
• Suitable for clean, chemically neutral water
467.0006 GB – 550 342 BA-2006.03 NAM-F series 9

Transport, storage and disposal
4 Transport, storage and disposal
4.1 Transport
For details of weight (→documents for the particular
order).
4.1.1 Unpacking and inspection on delivery
1. Unpack the pump/aggregate on delivery and inspect it for
damage.
2. Report any damage to the manufacturer immediately.
3. Dispose of packaging material according to local regula-
tions.
4.1.2 Lifting
DANGER
Death or crushing of limbs caused by falling or overturning
loads!
Use lifting gear appropriate for the total weight to be trans-
ported.
Fasten the lifting gear as illustrated below.
Do not stand under suspended loads.
Set the load down on a level surface.
Fig. 5 Fastening the lifting gear to the pump aggregate
Lift the pump/aggregate properly.
4.2 Preservation
Not necessary for non-rusting materials
CAUTION
Material damage due to inappropriate treatment for stor-
age!
Treat the pump properly, inside and outside, for storage.
1. Choose a preservative appropriate for the type and dura-
tion of storage (→9.2.2 Preservatives, Page 29).
2. Use the preservative specified by the manufacturer.
3. All bare metal parts should be treated, inside and outside.
4.3 Storage
CAUTION
Material damage due to inappropriate storage!
Treat and store the pump properly.
1. Seal all openings with blind flanges, blind plugs or plastic
covers.
2. Make sure the storage room meets the following condi-
tions:
–Dry
– Frost-free
– Vibration-free
3. Turn the shaft once a month.
4. Make sure the shaft and bearing change their rotational
position in the process.
10 NAM-F series BA-2006.03 467.0006 GB – 550 342

Transport, storage and disposal
4.4 Removing the preservative
Only necessary for pumps treated with preservative
WARNING
Risk of poisoning from preservatives and cleaning agents
in the foodstuffs and drinking water sector!
Only use cleaning agents which are compatible with the
pumped medium (→9.2.5 Cleaning agents, Page 30).
Completely remove all preservative.
CAUTION
High water pressure or spray water can damage bearings!
Do not clean the bearing areas with a water or steam jet.
CAUTION
Damage to seals due to incorrect cleaning agent!
Ensure the cleaning agent does not corrode the seals.
1. Choose a suitable cleaning agent for the application.
(→9.2.5 Cleaning agents, Page 30).
With Tectyl 506 EH: allow benzine to soak in for 10 minutes
(recommended).
2. Dispose of preservatives according to local regulations.
3. For storage times in excess of 6 months:
– Replace the elastomer parts made of EP rubber
(EPDM).
– Check all elastomer parts (O-rings, shaft seals) for
proper elasticity and replace them if necessary.
467.0006 GB – 550 342 BA-2006.03 NAM-F series 11

Setup and connection
5 Setup and connection
CAUTION
Material damage caused by dirt!
Do not remove the transport seals until immediately before
setting up the pump.
Do not remove any covers and transport and sealing cov-
ers until immediately before connecting the piping to the
pump.
5.1 Preparing the setup
5.1.1 Checking the ambient conditions
1. Make sure the required ambient conditions are fulfilled
(→9.2.1 Ambient conditions, Page 29).
2. For setup heights > 1000 m above sea level, consult the
manufacturer.
5.1.2 Preparing the installation site
Ensure the installation site meets the following conditions:
– Pump is freely accessible from all sides
–Sufficient space for installation/removal of the pipes
and for maintenance and repair work, especially for the
removal and installation of the pump and the motor
– Pump not exposed to external vibrations (damage to
bearings)
– Frost protection
5.1.3 Removing the preservative
If the pump is to be put into operation immediately after
setup and connection: remove the preservative prior to
setup (→4.4 Removing the preservative , Page 11).
5.1.4 Fastening the pump
Install and fasten the pump (→installation drawing):
– Base installation: screw the feet to the floor.
– Wall attachment: screw the console onto the wall.
5.2 Installing the motor
Only necessary if the pump aggregate is assembled on
site.
CAUTION
Material damage caused by knocks and bumps!
Keep the coupling halves properly aligned when pushing
on the motor.
Do not knock or hit any components of the pump.
1. Smear a very thin coat of molybdenum disulfide (e.g.
Molykote) on the shaft ends of the pump and motor.
2. Insert shaft keys.
3. Without a mounting rig: remove the rubber buffers and
warm up both halves of the coupling to approx. 100 °C.
4. Slide on the pump-side and motor-side coupling halves
until the shaft ends are flush with the center of the coupling.
When doing this, ensure the prescribed spacing between
the two halves of the coupling is maintained (→assembly
instructions for the coupling).
5. Tighten the grub screws on both halves of the coupling.
6. Screw in the motor bolts and tighten them.
5.3 Planning the piping
5.3.1 Keeping the piping clean
CAUTION
Material damage due to impurities in the pump!
Make sure no impurities can get into the pump.
1. Clean all piping parts and armatures prior to assembly.
2. Ensure no flange seals protrude inwards.
3. Remove any blind flanges, plugs, protective foils and/or
protective paint from flanges.
5.3.2 Specifying supports and flange connections
CAUTION
Material damage due to excessive forces and torques
exerted by the piping on the pump!
Do not exceed permissible limits.
1. Calculate the pipe forces taking every possible operating
condition into account:
– Cold/warm
– Empty/full
– Unpressurized/pressurized
– Shift in position of flanges
2. Ensure the pipe supports have permanent low-friction
properties and do not seize up due to corrosion.
12 NAM-F series BA-2006.03 467.0006 GB – 550 342

Setup and connection
5.3.3 Specifying nominal diameters
Keep the flow resistance in the pipes as low as possible.
1. Specify the nominal suction pipe diameter ≥nominal suc-
tion flange diameter.
2. Specify the nominal pressure pipe diameter ≥nominal
pressure flange diameter.
5.3.4 Specifying pipe lengths
C
D
B
A
Fig. 6 Straight pipe lengths upstream and downstream
of the pump (recommended)
A > 5 x nominal suction pipe diameter
B Nominal suction pipe diameter
C Nominal pressure pipe diameter
D > 5 x nominal pressure pipe diameter
Maintain the recommended minimum values when install-
ing the pump.
Suction side: shorter pipes are possible but may restrict
the hydraulic performance.
Pressure side: shorter pipes are possible but can result in
increased operating noise.
5.3.6 Optimizing cross-section and direction
changes
1. Avoid radii of curvature of less than 1.5 times the nominal
pipe diameter.
2. Avoid abrupt changes of cross-section along the piping
system.
5.3.7 Provide safety and control devices
(recommended)
Avoid impurities
1. Integrate a filter into the suction pipe.
2. To monitor impurities, install a differential pressure gauge
with a contact manometer.
Avoid reverse running
Install a non-return valve between the pressure flange and
the gate valve to ensure the medium does not flow back
when the pump is switched off.
Make provisions for isolating and shutting off the pipes
For maintenance and repair work.
Provide shut-off devices in the suction and pressure pipes.
Allow the measurement of the operating conditions
1. Provide manometers for pressure measurements in suc-
tion and pressure pipes.
2. Provide for motor-side torque measurements.
3. Provide for pump-side temperature measurements.
467.0006 GB – 550 342 BA-2006.03 NAM-F series 13

Setup and connection
5.4 Connecting the pipes
5.4.1 Installing auxiliary pipes (if available)
Follow the manufacturers' specifications for any existing
auxiliary systems.
1. Connect the auxiliary pipes to the auxiliary connections so
that they are stress-free and do not leak (→setup drawing).
2. To avoid air pockets, run the pipes with a continuous slope
up to the pump.
5.4.2 Installing the suction pipe
1. Remove the transport and sealing covers from the pump.
2. To avoid air pockets, run the pipes with a continuous slope
up to the pump.
3. Ensure no seals protrude inwards.
4. For suction operation: install a foot valve in the suction pipe
to prevent the pump and suction pipe from running empty
during downtimes.
5.4.3 Installing the pressure pipe
1. Remove the transport and sealing covers from the pump.
2. Install the pressure pipe.
3. Ensure no seals protrude inwards.
5.4.4 Inspection for stress-free pipe connections
✔Piping installed and cooled down
1. Separate the pipe connecting flanges from the pump.
2. Check whether the pipes can be moved freely in all direc-
tions within the expected range of expansion:
– Nominal diameter < 150 mm: by hand
– Nominal diameter > 150 mm: with small lever
3. Make sure the flange surfaces are parallel.
4. Reconnect the pipe connecting flanges to the pump.
5.5 Electrical connection
DANGER
Risk of death due to electric shock!
Have all electrical work carried out by qualified electricians
only.
DANGER
Risk of death due to rotating parts!
Isolate the motor from its supply voltage and keep it locked
in that state when carrying out any fitting or maintenance
work.
5.5.1 Connecting the motor
Follow the instructions of the motor manufacturer.
1. Connect the motor according to the connection diagram.
2. Make sure that no danger arises due to electrical energy.
3. Install an EMERGENCY STOP switch.
5.5.2 Checking the direction of rotation
DANGER
Risk of death due to rotating parts!
Use protective equipment when carrying out any work on
the pump.
Secure the shaft key from being thrown out when checking
the direction of rotation.
Keep an adequate distance to rotating parts.
CAUTION
Material damage caused by running dry or wrong direction
of rotation!
Uncouple the motor from the pump.
1. Switch the motor on and immediately off again.
2. Check whether the direction of rotation of the motor corre-
sponds to the rotational direction arrow on the pump.
3. If the direction of rotation is different: swap two phases.
4. Couple the motor to the pump again.
14 NAM-F series BA-2006.03 467.0006 GB – 550 342

Setup and connection
5.6 Checking the alignment of the
coupling
The motor and pump can be aligned precisely only at the
factory.
DANGER
Risk of death due to rotating parts!
Isolate the motor from its supply voltage and keep it locked
in that state when carrying out any fitting or maintenance
work.
CAUTION
Material damage due to incorrect alignment of the cou-
pling!
If there is any lateral or angular displacement, align the
motor exactly with the pump.
For detailed information and special couplings: (→manu-
facturer's specifications).
Checking the alignment of the coupling
✔Implements, tools and materials:
– Dial gage (can be used for couplings with a spacer
piece)
– Other suitable tools, e.g. laser alignment instrument
Fig. 7 Checking the lateral displacement
1. Check the lateral displacement with a dial gage:
– Carry out the measurement as illustrated.
– Permissible radial deviation, measured at the coupling
circumference: < 0.2 mm
Fig. 8 Checking the angular displacement
2. Check the angular displacement with a dial gage:
– Carry out the measurement as illustrated.
3. Send the pump to the factory for inspection and alignment
in the event of impermissible lateral or angular displace-
ment.
467.0006 GB – 550 342 BA-2006.03 NAM-F series 15

Operation
6 Operation
6.1 Preparations for the initial start-up
6.1.1 Identifying the pump type
Identify the pump type (→order data sheet).
Pump types vary e.g. with regard to bearing lubrication,
bearing bracket size, type of shaft seal and auxiliary sys-
tems.
6.1.2 Removing the preservative
Only necessary for pumps treated with preservative
(→4.4 Removing the preservative , Page 11).
6.1.3 Lubricating the bearings
Pumps with grease-lubricated roller bearings are ready for
operation upon delivery.
6.1.4 Preparing auxiliary systems (if available)
The manufacturer does not accept any liability for damage
arising from the installation or use of a third-party or unap-
proved auxiliary system.
6.1.5 Filling and bleeding
CAUTION
Material damage caused by dry running!
Make sure the pump is filled properly.
Without automatic aspirator (supply operation)
1. Fill the pump and the suction pipe with pumped medium.
2. Open the suction-side armature.
3. Open the pressure-side armature.
4. If available: open the auxiliary systems and check the flow
rate.
5. Verify that no pipe connections are leaking.
With automatic aspirator (suction operation)
1. Fill the pump and the suction pipe with pumped medium.
2. Open the suction-side armature.
3. Close the pressure-side armature.
4. If available: open the auxiliary systems and check the flow
rate.
5. Verify that no pipe connections are leaking.
6. Start suction operation (→A25 operating manual manufac-
turer instructions).
6.2 Start-up
6.2.1 Switching on
✔Pump set up and connected properly
✔Motor set up and connected properly
✔Motor exactly aligned with the pump
✔All connections stress-free and sealed
✔Any existing auxiliary systems are ready for operation
✔All safety equipment installed and tested for functionality
✔Pump prepared, filled and bled properly
DANGER
Risk of injury due to running pump!
Do not touch the running pump.
Do not carry out any work on the running pump.
Allow the pump to cool down completely before starting any
work.
WARNING
Risk of injury due to hot pump parts!
Use protective equipment when carrying out any work on
the pump.
CAUTION
Material damage caused by dry running!
Make sure the pump is filled properly.
CAUTION
Risk of cavitation when throttling down the suction flow
rate!
Fully open the suction-side armature and do not use it to
adjust the flow rate.
Do not open the pressure-side armature beyond the oper-
ating point.
CAUTION
Material damage caused by overheating!
Do not operate the pump while the pressure-side armature
is closed.
Observe the minimum flow rate (→order data sheet).
1. Open the suction-side armature.
2. Close the pressure-side armature.
3. Switch on the motor and check it for smooth running.
4. Once the motor has reached its nominal speed, slowly
open the pressure-side armature until the operating point
is reached.
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Operation
5. After the initial stress caused by pressure and operating
temperature, check that the pump is not leaking.
6.2.2 Switching off
✔Pressure-side armature closed (recommended)
WARNING
Risk of injury due to hot pump parts!
Use protective equipment when carrying out any work on
the pump.
1. Switch off the motor.
2. Check all connecting bolts and tighten them if necessary.
6.3 Shutting down
WARNING
Risk of injury due to hot pump parts!
Use protective equipment when carrying out any work on
the pump.
Take the following measures whenever the pump is shut
down:
Pump is Measure
...shut down
for a prolonged
period
Take any measures depending
on the pumped medium
(→Table 7 Measures
depending on the behavior of
the pumped medium, Page 17).
...emptied Close the suction-side and
pressure-side armatures.
...dismounted Isolate the motor from its power
supply and secure it against
unauthorized switch-on.
...put into
storage
Follow the storage instructions
(→4.3 Storage, Page 10).
Tab. 6 Measures to be taken if the pump is shut down
Duration of shutdown (depending
on process)
Behavior
of pumped
medium Short Long
Solids sediment Flush the
pump.
Flush the
pump.
Solidifies/
freezes,
non-corrosive
Heat up or
empty the
pump and
containers.
Empty the
pump and
containers.
Solidifies/
freezes,
corrosive
Heat up or
empty the
pump and
containers.
Empty the
pump and
containers.
Treat the
pump and
containers
with preser-
vative.
Remains liquid,
non-corrosive
––
Remains liquid,
corrosive
–Empty the
pump and
containers.
Treat the
pump and
containers
with preser-
vative.
Tab. 7 Measures depending on the behavior
of the pumped medium
467.0006 GB – 550 342 BA-2006.03 NAM-F series 17

Operation
6.4 Start-up following a shutdown period
1. If the pump is shut down for > 1 year, take the following
measures before starting it up again:
Shutdown period Measure
>1year For versions with roller
bearings without lifetime
lubrication: relubricate
>2years Replace elastomer seals
(O-rings, shaft sealing rings).
Replace antifriction bearings.
Tab. 8 Measures to be taken after prolonged
shutdown periods
2. Carry out all steps as for the initial start-up (→6.2 Start-up,
Page 16).
6.5 Operating the stand-by pump
✔Stand-by pump filled and bled
Operate the stand-by pump at least once a week.
1. Completely open the suction-side armature.
2. Open the pressure-side armature to an extent that the
stand-by pump reaches its operating temperature and is
heated through evenly (→6.2.1 Switching on, Page 16).
18 NAM-F series BA-2006.03 467.0006 GB – 550 342

Maintenance
7 Maintenance
Trained service technicians are available for fitting and
repair jobs. Present a pumped medium certificate (DIN
safety data sheet or safety certificate) when requesting
service.
7.1 Inspections
DANGER
Risk of injury due to running pump!
Do not touch the running pump.
Do not carry out any work on the running pump.
WARNING
Risk of injury due to hot pump parts!
Use protective equipment when carrying out any work on
the pump.
1. Check at appropriate intervals:
– Maintenance of minimum flow rate
– Temperature of roller bearings < 120 °C
– Normal operating conditions unchanged
– Coupling alignment and condition of elastic parts
2. For trouble-free operation, always ensure the following:
– No dry running
– No leaks
– No cavitation
– Suction-side gate valves open
– Unobstructed and clean filters
–Sufficient supply pressure
– No unusual running noises or vibrations
– No excessive leakage at the shaft seal
– Proper functioning of auxiliary systems
– Put the installed stand-by pump into operation at least
once a week
7.2 Maintenance
Service life of the antifriction bearings for operation within
the permissible operating range: > 1000 h
Intermittent operation, high temperatures, low viscosities
and aggressive ambient and process conditions reduce the
service life of antifriction bearings.
Mechanical seals are subject to natural wear, which
strongly depends on the actual operating conditions.
Therefore, general statements regarding their service life
cannot be made.
DANGER
Risk of injury due to running pump!
Do not touch the running pump.
Do not carry out any work on the running pump.
Isolate the motor from its supply voltage and keep it locked
in that state when carrying out any fitting or maintenance
work.
DANGER
Risk of death due to electric shock!
Have all electrical work carried out by qualified electricians
only.
WARNING
Risk of injury due to hot pump parts!
Use protective equipment when carrying out any work on
the pump.
Allow the pump to cool down completely before commenc-
ing any work.
Make sure the pump is unpressurized.
Empty the pump.
7.2.1 Antifriction bearings lubricated with grease
1. Replace the antifriction bearings with lifetime lubrication
(recommended):
– After 1000 operating hours
– At the latest after two years
2. Fill any open antifriction bearings without guard disks with
grease (→9.2.6 Lubricants, Page 30).
7.2.2 Mechanical seals
Due to their function, mechanical seals always leak a bit
(→manufacturer's specifications).
In the event of a larger leak: replace the mechanical seal
and its auxiliary seals.
467.0006 GB – 550 342 BA-2006.03 NAM-F series 19

Maintenance
7.3 Dismounting
DANGER
Risk of injury due to running pump!
Do not touch the running pump.
Do not carry out any work on the running pump.
Isolate the motor from its supply voltage and keep it locked
in that state when carrying out any fitting or maintenance
work.
DANGER
Risk of death due to electric shock!
Have all electrical work carried out by qualified electricians
only.
WARNING
Risk of injury due to hot pump parts!
Use protective equipment when carrying out any work on
the pump.
Allow the pump to cool down completely before commenc-
ing any work.
Make sure the pump is unpressurized.
Empty the pump.
7.3.1 Returning the pump to the manufacturer
✔Pump unpressurized
✔Pump completely empty
✔Electrical connections isolated and motor secured against
switch-on
✔Pump cooled down
✔Coupling guard dismounted
✔With couplings with a spacer piece: spacer piece removed
✔Manometer connections, manometer and fixtures dis-
mounted
1. Always enclose a truthfully (fully) completed safety certifi-
cate when returning pumps or individual parts to the man-
ufacturer. Order a safety certificate from the manufacturer
if necessary.
2. Take necessary measures, depending on the required
repair work, as listed in the table below when returning the
pump to the manufacturer.
Repair carried out Measure for return
...at the customer's
premises
Return the defective
component to the
manufacturer.
...at the
manufacturer's
premises
Flush the pump.
Return the complete pump
(not disassembled) to the
manufacturer.
...at the
manufacturer's
premises for
warranty repairs
Only if the pumped media
is hazardous: flush and
decontaminate the pump.
Return the complete pump
(not disassembled) to the
manufacturer.
Tab. 9 Measures for return
7.3.2 Preparations for dismounting
✔Pump unpressurized
✔Pump completely empty, flushed and decontaminated
✔Electrical connections isolated and motor secured against
switch-on
✔Pump cooled down
✔Coupling guard dismounted
✔With couplings with a spacer piece: spacer piece removed
✔Manometer connections, manometer and fixtures dis-
mounted
In production, the pumps are constructed to a standard pro-
cess. The slide-in unit can be removed without removing
the volute casing and piping.
When dismounting, observe the following:
– Precisely mark the assembly orientation and position
of all components before dismounting.
– Dismantle components concentrically without canting.
– Dismount the pump (→sectional drawing).
20 NAM-F series BA-2006.03 467.0006 GB – 550 342