Richter MNK Series User manual

INSTALLATION AND OPERATING MANUAL
Translation of the original manual
Keep for future use!
This operating manual must be strictly observed before
transport, installation, operation and maintenance
Subject to change without notice.
Reproduction is generally permitted with indication of the source.
©Richter Chemie-Technik GmbH
9230-053-en Revision 12 Edition 03/2011
Series MNK
Sealless Chemical
Magnetic Drive Pump
Bearing lubrication:Long life grease,
grease or oil bath
Bearing pedestal group: 4

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List of Contents
List of Contents ........................................ 2
Relevant documents................................. 3
1Technical data...................................... 3
1.1 Tightening torques. ... . . ... . . ... . .... . ... . . ... . . ... . . ... . 4
1.2 Type plate, dry-running, ATEX-and housing
m a r k i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Spare parts .................................................. 4
2Notes on safety .................................... 5
2.1 Intended use................................................ 5
2.2 For the customer/operator........................... 6
2.3 For maintenance ......................................... 6
2.4 Conversion work and production of spare
parts by the customer.................................. 6
2.5 Improper operation ...................................... 6
2.6 Special requirements for explosion protection
.. . . ... . . ... . .... . .... . ... . . ... . . ... . .... . ... . . ... . . ... . .... . .... 6
2.6.1 Filling the unit ..................................................6
2.6.2 Special operating conditions............................6
2.6.3 Chargeable liquids...........................................7
2.6.4 I de ntifi cat ion . ........ .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . 7
2.6.5 Check of the direction of rotation .....................7
2.6.6 Mode of operation of the pump ........................7
2.6.7 Temperature limits...........................................7
2.6.8 M a i n t e n a n c e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6.9 Electric peripheral equipment ..........................8
3Transport and storage......................... 9
3.1 Return consignments .................................. 9
3.2 D i s p o s a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4Product description........................... 10
5Installation.......................................... 10
5.1 Safety regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0
5.2 Installation of pump/unit ............................ 10
5.3 Alignment of pump-coupling-motor ........... 10
5.4 P i p i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1
5.4.1 Nominal size..................................................11
5.4.2 Nozzle loads..................................................11
5.4.3 S u c t i o n l i n e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1
5.4.4 Supply lines...................................................11
5.4.5 Discharge line................................................11
5.4.6 Venting and evacuating .................................12
5.5 Pipe fittings................................................ 12
5.6 Monitoring facilities.................................... 12
5.7 Drive .. ..... ............ ..... ............ ..... ..... ............ 1 2
5.8 Coupling .................................................... 13
5.9 Final check ................................................ 13
5.10 Coupling guard .......................................... 13
5.11 Electric connection .................................... 13
6Commissioning/Shutdown ............... 14
6.1 Initial commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4
6.1.1 Filling the pump housing................................14
6.1.2 Start-up ................. ............. ................. .......... 14
6.2 Operating limits..........................................14
6.2.1 Abrasive media ............................................. 14
6.2.2 Min./max. flow rate ........................................14
6.3 S h u t d o w n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
6.4 Restarting ..................................................15
6.5 Improper operations and their consequences
( e x a m p l e s ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
7Maintenance....................................... 16
7.1 Screw connections of the housing.............16
7.2 Bearing pedestal........................................16
7.2.1 Long-life grease lubricated rolling bearings....16
7.2.2 Regreasable rolling bearings .........................16
7.2.3 Oilbath lubrication..........................................16
7.3 C l e a n i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
7.4 Stand-by pumps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
7.5 Notes on dismantling .................................17
7.5.1 Protective clothing ......................................... 17
7.5.2 Magnetic fields ..............................................17
7.6 D i s m a n t l i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
7.6.1 Dismantling the slide-in unit...........................18
7.6.2 Dismantling the drive unit Long life grease and
grease lubrication.......................................... 18
7.6.3 Dismantling the drive unit Oil bath lubrication19
7.7 Notes on assembly ....................................19
7.8 Assembly ...................................................19
7.8.1 Assembly of drive unit Long life grease and
grease lubrication.......................................... 19
7.8.2 Assembly of drive unit Oil bath lubrication ....19
7.8.3 Trial assembly of the slide-in unit.. . . . . . . . . . . . . . . . . . 2 0
7.8.4 Assembly of slide-in unit................................20
7.8.5 Final assembly ..............................................20
7.8.6 Fill bearing pedestal with oil...........................21
7.9 T e s t s . . . .. . .. . . .. . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . 2 1
8Malfunctions ...................................... 22
9Exploded drawing.............................. 23
9.1 Long life grease lubrication........................23
9.2 Oil bath lubrication .....................................24
10 Sectional drawing.............................. 25
10.1 L e g e n d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5
10.2 Sectional drawing long life grease lubrication
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6
10.3 Sectional drawing grease lubrication with
regreasable rolling bearings ......................27
10.4 Sectional drawing SCK oil bath lubrication28

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11 Assembly aids.................................... 29
11.1 Boring template for housing drain ............. 29
11.2 Pull-off device for plain bearing bushes .... 29
11.3 Universal impeller wrench and universal
inner magnet assembly clamping device .. 29
11.4 Sliding and support pedestal for the slide-in
u n i t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 0
Relevant documents
Data sheet
Works certificate
Sectional drawing
Long life grease lubrication 9230-00-3030
Grease lubrication 9230-00-3031
Oil bath lubrication 9230-00-3032
Dimensional drawing 9230-00-3034
Installation drawing 9230-00-3040
Performance curves
Spare parts list
Operating manual and declaration of conformity
motor *
Operating manual and declaration of conformity
coupling *
Supplementary Installation and Operating Manual
for external flushing 9230-060-en *
Appendix to the operating manual
Operational limits 9230-00-3041
Declaration of conformity with ATEX
Declaraton of conformity without ATEX
Form for Safety Information Concerning the
Contamination QM 0912-16-2001_en
On request:
Magnetic drive data Richter TIS 0543-03-0001
Publication: "Centrifugal Pump Operation without
NSPH Problems"
Publication "Safe Operation of Magnetic Drive
Pumps“
*if contained in the scope of delivery
1Technical data
Manufacturer :
Richter Chemie-Technik GmbH
Otto-Schott-Str. 2
D-47906 Kempen
Telephone: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: http://www.richter-ct.com
Authorised person acc. to machinery directive
2006/42/EG:Gregor Kleining
Designation :
Single-stage, plastic-lined, magnetic drive chemical
centrifugal pump, series MNK 200-150-315, long life
grease, grease and oil bath lubrication.
Heavy-duty horizontal design, sealless, free of eddy
currents
Technical specifications to ISO 15783 and DIN ISO
5199
Connecting dimensions to ISO 2858 / DIN EN 22858
Flange connecting dimensions:
DIN EN 1092-2, type B (ISO 7005-2, type B) PN 16,
PN 25 or flanges drilled to ASME 16.5, Class 150
ATEX 95 Directive 94/9/EC
Machine Directive 2006/42/EC
Materials :
Pressure-bearing parts:
ductile cast iron EN-JS 1049 to DIN EN 1563 (0.7043
DIN 1693), carbon fibre composite material
Wetted parts:
PFA, PTFE, PE, SSiC, FFKM,
see also data sheet
Flow rate : up to 600 m3/h
Delivery head : up to 60 m LC (at 2000 min-1)
Housing discharge pressure : max. 25 bar
detailed data see operational limits

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Temperature range : - 60 °C to + 150 °C
Note:Consult the manufacturer for higher pressures
and lower or higher temperatures.
Temperature classes : see Section 2.6.7.
Admissible ambient conditions for pumps
acc. to directive 94/9/ EG (ATEX 95) :
Ambient temperature range: - 20 °C to + 40 °C
(higher temperature after consulting the manufacturer)
Ambient pressure range: 0,8 barabs to 1,1 barabs
Noise capacity level : LWA=K70 dB acc. to
DIN EN ISO 9614-2
Sizes: 200-150-315
Weight : See data sheet
Dimensions :
See installation drawing
1.1 Tighteningtorques
Screws greased, tighten in diametrically opposite
sequence
Housing screws 901/3
Housing discharge
pressure No. x size Tightening torque
[DIN/ISO] [Nm]
PN16 16 x M 20 125
PN 25 16 x M 20 170
150 lbs 16 x M 20 145
Pipe screws,flanges to DIN/ISO
PN 16
DN No. x size Tightening torque
[mm] [DIN/ISO] [Nm] [in-lbs]
150 8 x M 20 65 575
200 12 x M 20 100 885
Pipe screws,flanges to DIN/ISO
PN 25
DN No. x size Tightening torque
[mm] [DIN/ISO] [Nm] [in-lbs]
150 8 x M 24 100 885
200 12 x M 24 115 1018
Pipe screws,DIN/ISO flanges drilled to ASME
150 lbs
DN No. x size Tightening torque
[mm] [inch] [ASME] [Nm] [in-lbs]
150 6“ 8 x ¾“ 80 708
200 8“ 8 x ¾“ 115 1018
1.2 Type plate, dry-running, ATEX-
and housing markings
The stainless steel type plate is firmly riveted to the
housing:
If the operator attaches his identification, it must be
ensured that the pump matches the application in
question.
Example of type plate:
Dry-running:
ATEX marking:
Housing identification:
The following are visible on the housing according to
DIN EN 19:
Nominal size
Rated pressure
Housing material
Manufacturer's identification
Melt number/Foundry identification
Cast date
1.3 Spareparts
Spare parts for two years of continuous operation in
accordance with DIN 24296 and in consultation with
the manufacturer

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2 Notes on safety
This operating manual contains fundamental
information which is to be observed during installation,
operation and maintenance.
It must be read before installation and commissioning!
This operating manual must always be available at the
place of use of the machine/plant.
In addition to the general notes on safety under the
main heading “Safety”, special notes on safety are
included at other points and must be observed.
Installation, operation and maintenance are to be
performed by qualified staff.
The area of responsibility, authority and supervision of
the staff must be exactly regulated by the customer.
If the staff does not have the necessary expertise,
they are to be trained and instructed.
If necessary, this can be provided by the
manufacturer/supplier on behalf of the machine
operator.
General hazard symbol! People may be put
at risk.
Safety symbol! The pump and its function
may be put at risk if this safety symbol is not
observed.
EU marking! Explosion-protected
equipment must be identified for work in
potentially explosive areas.
Warning of a magnetic field!
Warning of electric power!
This warning sign must be used if people
with a pacemaker are at risk, e.g. from a
strong magnetic field.
It is imperative to observe signs attached directly to
the pump / unit, e.g.:
Direction of rotation arrow
Warning against dry-running
and they are to be kept legible.
Non-observance of the notes on safety may result
in the loss of any and all claims for damages.
Non-observance may involve the following hazards :
Failure of important functions of the machine/plant.
Failure of electronic equipment and measuring
instruments due to magnetic fields.
Risk to people and their personal property from
magnetic fields.
Risk to people from electric, mechanical and
chemical effects.
Risks to the environment through leaks of
hazardous substances.
If the unit is used in potentially explosive
areas, special attention is to be paid to the
sections identified with “Ex” in this
operating manual.
2.1 Intendeduse
Richter pumps of the series MNK 200-150-315 is a
plastic-lined magnetic drive centrifugal pump for the
leak-free conveyance of aggressive, toxic, pure and
inflammable liquids.
The pump is equipped with a permanent magnetic
synchronous drive.
The pump is intended for horizontal installation.
The observance of the specified physical
limits is important for perfect functioning and
safe operation, especially with regard to
explosion protection to prevent potential sources of
ignition (see Section 2.6):
It must be ensured that the pump is always filled
with liquid during operation.
For safe pump operation, we recommend a flow
rate which lies between 0.3 and 1.1Qopt. The
maximum operating temperature must never be
exceeded. Consult the manufacturer for operation
outside this range and observe Section 2.6.7.
The manufacturer must be consulted in the event
of entrainment of gas >2% as well as solids in
order to avoid a lack of lubrication and dry-running.
The plant NPSH value (NPSHA) should be 0.5 m
higher than the NPSH value of the pump
(NPSHR). See also Section 5.4.1.
Improper operation, even for brief periods,
may result in serious damage to the unit.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks) can
result from these inadmissible modes of operation;
their occurrence can only be prevented by adhering to
the intended use.
Furthermore, reference is made in this connection to
the Directive 95/C332/06 (ATEX 118a) which contains
the minimum regulations for improving the
occupational health and safety of the workers who
may be at risk from an explosive atmosphere.
This unit must not be operated above the
values specified in the data sheet as regards
the fluid to be conveyed, flow rate, speed,
density, delivery head and operating temperature as
well as the motor rating.
The instructions contained in the operating
manual or contract documentation must be
observed; if necessary consult the manufacturer.
All important features are documented in the data
sheet included in the scope of delivery.

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Inthe event of operating conditions other than those
described in the data sheet, the following are to be
checked again:
design of the pump
design of the accessories
resistance of the materials.
2.2 For the customer/operator
The following must be observed:
The notes on safety contained in this operating
manual,
The prevailing regulations on accident prevention,
In-house work, operating and safety regulations of
the customer.
Hot or cold machine parts must be protected by
the customer against being touched.
No protective facilities may be removed when the
machine is in operation.
Hazards due to electricity are to be excluded.
Leaks of hazardous media (e.g. explosive, toxic,
hot) must be removed so that no risk arises for
people and the environment. The statutory
provisions are to be observed.
Caution when using the units in potentially
explosive area!
Inadmissible modes of operation must be
prevented.
2.3 Formaintenance
In principle, work on the unit may only be performed
when it is at a standstill.
It is imperative to observe the procedure for stopping
the machine described in this operating manual. See
Section 6.3.
Pumps which convey media which are a health
hazard must be decontaminated.
Directly on completion of the work all safety and
protective facilities must be mounted and activated
again.
In the assembled state, if the safety notes (see also
Section 5.1 and 7.5.2
)are observed, the magnetic
drives do not cause any risks or have any affect on
the environment.
During dismantling and assembly as well as
during transport and storage of the magnetic
drives as single components, the notes on
safety in Section 7.5.2 must be observed.
The points listed in Section 6.1 must be followed
before recommissioning.
2.4 Conversionworkand
production of spare parts by
the customer
Conversion of or changes to the machine are only
admissible after consultation with the manufacturer.
Original spare parts and accessories authorised by
the manufacturer serve to enhance safety.
The use of other parts may annul the liability for any
resultant consequences.
2.5 Improperoperation
The operational safety of the machine supplied is only
guaranteed if it is used properly in accordance with
Section 2.1 of this operating manual.
The operating limits specified in the data sheet must
under no circumstances be exceeded.
2.6 Specialrequirementsfor
explosion protection
If the units are used in potentially explosive areas, the
measures and notes in Sections 2.6.1 to 2.6.9 are
imperative to guarantee the explosion protection.
2.6.1 Filling the unit
During pump operation the wetted interior of
the pump must always be filled with the liquid
medium.
This prevents any explosive atmosphere and the risk
of dry-running.
If the customer cannot ensure this, we
recommend that appropriate monitoring
facilities be provided.
All auxiliary, heating and cooling systems
must also be carefully filled.
2.6.2 Special operating conditions
In the standard version the plain bearings are
lubricated and cooled by the internal flushing
circuit.
Owing to properties of the medium (e.g. sticking due
to inadmissible solids entrainment, clogging, gas
entrainment etc.) the cooling flow can be interrupted
and, as a result, an inadmissible temperature rise may
occur. Provide appropriate monitoring facilities. See
Section 5.6.
For safe pump operation, we recommend a flow rate
of 0.3 to 1.1 Qopt.If the pump is operated outside this
range, it must be ensured that the max. admissible
flow rate according to the pump characteristic curve is
not exceeded and that the max. admissible operating
temperature according to Section 2.6.7 is observed.

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Ifthe flow rate is too high, the differential pressure
upstream and downstream of the plain bearings could
fall so much that a lack of lubrication or dry-running
may occur.
Ifthe flow rate is too low, the medium may heat up so
much owing to the fluid friction that the max.
admissible surface temperature of the relevant
temperature class is exceeded.
Overloading, overheating, non-observance of the
design data or the incorrect selection of the magnetic
drive can lead to the decoupling of the inner and outer
magnet assemblies. As a result, eddy currents may be
induced on the inner and outer magnet assemblies
and an inadmissible temperature rise may occur.
Provide appropriate monitoring facilities. See Section
5.6.
The plant NPSH value (NPSHA) should be minimum
0.5m higher than the NPSH value of the pump
(NPSHR) to prevent a lack of lubrication or dry-
running of the plain bearings.
2.6.3 Chargeableliquids
For operation with chargeable liquids with a
conductivity <10-8S/m inert gas must be used
for flushing during evacuation if the lining of
the pump is non-conductive. See Section 6.3.
2.6.4 Identification
The identification on the pump relates to the
pump section. A separate declaration of
conformity must be provided for the shaft
coupling and motor and for other attachments as well
as corresponding identification.
Example of the identification of the pump section:
II2GD IIC TX X.
For assembling the pump with components which are
not explosion-protected (e.g. motor, shaft coupling), it
is recommended to mask or remove the "potentially
explosive" identification from the pump component
and, if necessary, from other accessories.
In this case the declaration of conformity applies
without ATEX identification.
At surface temperatures which depend primarily on
operating conditions, DIN EN 13463-1 Chapter 9.3
allows no temperature class or temperature to be
indicated.
The temperature class must be determined by the
operator in accordance with Section 2.6.7
“Temperature Limits”.
2.6.5 Check of the direction of rotation
If there is also a risk of explosion during the
installation phase, the check of the direction of
rotation must under no circumstances be conducted
by briefly switching on the unfilled pump in order to
prevent an inadmissible rise in temperature at the
plain bearings.
We recommend you to only perform a check of the
direction of rotation with the coupling disengaged or
with a rotating field instrument. See also Section
6.1.2.
2.6.6 Mode of operation of the pump
The pump may only be started with the suction side
shut-off element fully opened and the discharge side
shut-off element slightly opened. Start-up against a
closed check valve is also possible. The discharge
side shut-off element is to be regulated to the
operating design point directly after run-up.
See also Section 5.4.1.
Operation with closed shut-off elements in the
suction and/or discharge lines is not permitted!
There is a risk that even after a short time
high surface temperatures on the pump
housing may occur owing to rapid heating of
the liquid in the pump interior.
Arapid rise in the pressure inside the pump
involves the risk of overloading to the point of
bursting.
The pump must not be in operation in the
unfilled or partially filled state (dry
running). This results in serious damage to
the pump and additional risks to the environment
can arise.
Dry-running cannot only occur with an
insufficiently filled interior but also in the event
of high gas contents in the liquid medium.
Operation of the pump outside the admissible
operating range may also lead to dry-running (e.g.
due to evaporation in the interior).
2.6.7 Temperaturelimits
In the normal operating condition the highest
temperatures are to be expected at the contact point
shaft seal/shaft, on the inner races of the rolling
bearings and, at high medium temperatures, on
surface of the pump housing.
We would like to point out that the surface
temperature of the pump housing is only
slightly below the medium temperature.
If the pump is heated (e.g. heating jacket), it must be
ensured that the temperature classes prescribed in
the annex are observed.
The not heated pump surface must have free contact
with the environment.

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When operating the pump, make sure that an
excessive deposit of dust is avoided (possibly
regular cleaning). This prevents the pump
surface from heating to above the admissible
temperature.
Table 1 below indicates the admissible medium
temperature, depending on the pump design, as a
function of the temperature class in accordance with
EN 13463-1.
Table 1
Temperature class
acc. to EN 13463-1
Limit value of the
temperature of the liquid
Lining material PE PFA/PTFE
Can material 2) CFK-F CFK-F
T6 (85 °C) not certified to ATEX
T5 (100°C)
T4 (135 °C) 90 °C 1) 125 °C 1)
T3 (200 °C) 90 °C 150 °C
T2 (300 °C) 90 °C 150 °C
T1 (450 °C) 90 °C 150 °C
1) Long life grease-lubricated rolling bearings: No restrictions.
Regreasable rolling bearings: Standard design with
rotary shaft seal
T4 only applies to operation up to 1750 rpm
2) The can material has been list in the data sheet.
The plant customer must ensure that the
prescribed operating temperature is observed.
The maximum admissible temperature of the
liquid medium at the pump inlet depends on the
temperature class and the selected lining material
required in each case.
2.6.8 Maintenance
For safe and reliable operation, it must be
ensured with regular inspection intervals that
the unit is properly serviced and kept in a
perfect technical condition.
Example: Functioning of the rolling bearings. The
mode of operation and operating conditions largely
determine the actual service life that can be attained.
Regular checks of the bearing pedestal area can
prevent excessive temperatures due to hot-running
rolling bearings, collision of the drive magnet
assembly against the lantern or even defective
bearing seals. See Section 7.2.
In regard to media containing solids, the maintenance
intervals must be set by the operator in accordance
with the conditions of operation.
If auxiliary systems (e.g. external flushing, cooling,
heating) are installed, a check must be made to see
whether monitoring facilities are required to safeguard
their operation.
2.6.9 Electric peripheral equipment
Electric peripheral equipment, e.g. pressure,
temperature and flow sensors etc. must
comply with the prevailing safety requirements
and explosion protection provisions.

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3Transport and storage
The pump or the unit must be transported
properly. Ensure that during transport the
pump/unit remains in the horizontal position
and does not slip out of the transport
suspension points.
Apump or the motor can be suspended from the
crane hook lug provided for this purpose.
The suspension points are not suitable for
transporting a complete unit, i.e. pump with base plate
and motor.
In this case, the slinging points for the ropes on the
base plate are to be used. See Fig. 1.
Do not attach the slinging ropes to free shaft ends or
to the ring bolt of the motor.
Fig. 1
Directly after receipt of the goods, check the
consignment for completeness and any in-transit
damage.
Do not install damaged pumps in the plant.
When unpacking magnetic drives as single
parts, the relevant notes in Section 7.5.2
must be observed.
Flange covers serve as protection during transport
and must not be removed.
If the unit is not installed immediately after delivery, it
must be put into proper storage.
The product should be stored in a dry and vibration-
free, well ventilated room at as constant a
temperature as possible.
Elastomers are to be protected against UV light.
In general, a storage period of 10 years not exceed.
An admissible storage period of 4 years applies to
elastomers made of NBR.
If magnetic drives are stored as single parts,
the relevant notes in Section 7.5.2 are to be
observed.
In the case of prolonged storage conservation agents
on machined component surfaces and packing with a
desiccant may be necessary.
3.1 Returnconsignments
Pumps which have conveyed aggressive or
toxic media must be well flushed and cleaned
before being returned to the manufacturer's
works.
It is imperative to enclose a safety information
sheet / general safety certificate on the field of
application with the return consignment.
Pre-printed forms are enclosed with the installation
and operating manual.
Safety precautions and decontamination methods are
to be mentioned.
3.2 Disposal
Parts of the pump may be contaminated with medium
which is detrimental to health and the environment
and therefore cleaning is not sufficient.
Risk of personal injury and damage to the
environment due to the medium or oil!
Wear protective clothing when work is performed
on the pump.
Prior to the disposal of the pump:
Collect any medium, oil etc. which has escaped
and dispose of it in accordance with the local
regulations.
Neutralise any medium residues in the pump.
Separate pump materials (plastics, metals etc.)
and dispose of them in accordance with the local
regulations.

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4 Product description
The housing dimensions, nominal ratings and
technical requirements of the pump series MNK 200-
150-315 correspond to ISO 2858 / DIN EN 22858 /
ISO 15783 / DIN ISO 5199. The technical
requirements of the VDMA 24279 are satisfied.
The sectional drawing shows the design of the pump.
See Section 10.1.
All components which come into contact with the
medium are either plastic-lined or made of other
resistant materials, e.g. silicon carbide.
The housing 100 consists of a metallic shell with a
plastic lining.
The bearing bushes 545 and axial bearing 314 are
secured against turning in the plain bearing pedestal.
The bearing sleeves 529/1 are in the impeller, resp.
529/2 in the inner magnet assembly secured against
turning.
The bearing bushing 529/2 has an additional form
closure in the “lemon shape” along with the anti-twist
device. This increases the transmissible torque.
The can 159 is made of CFK (high-resistance, carbon
fibre composite material). It is protected against the
medium by a can insert 158 made of resistant plastic.
The plain bearing pedestal 339 separates the
hydraulic section of the pump from the can area. Both
chambers are connected by flushing bores in the plain
bearing pedestal so that an internal flushing circuit is
formed owing to the pressure differences. This circuit
serves to flush and cool the plain bearings.
Only oil bath lubrication
The bearing pedestal 330 contains radial ball bearings
321/1, 321/2, which are lubricated by an oil bath. This
oil bath is sealed by means of the shaft seals 421/1,
421/2 and the o-ring 412/1.
Special designs:
Avacuum-proof can unit is produced by gluing the
can to the can insert.
The can chamber is also vented and evacuated
through the bores in the plain bearing pedestal.
Additional information is provided in the brochure.
5 Installation
5.1 Safetyregulations
Equipment which is operated in potentially
explosive areas must satisfy the explosion
protection regulations.
People with a pacemaker are at risk from the
strong magnetic field of the magnetic drive. It
may be life-threatening for them to stay at a
distance of less than 500 mm to the pump.
5.2 Installation of pump/unit
The structural work must be prepared in accordance
with the dimensions in the installation drawing.
Method of installation: on a grouted base plate and
firm foundation
Align base plate on the ground foundation.
Insert foundation bolts and grout base plate.
Do not tighten the foundation bolts uniformly and
firmly until the mortar has set.
As soon as additional installations are
mounted, the stability of the entire unit
installed without a foundation must be
checked.
5.3 Alignment of pump-coupling-
motor
The following information is of a general nature. If
necessary, special notes of the coupling and motor
manufacturer are to be observed.
After attachment of the base plate on the foundation
and connection of the pipes, the alignment of the
coupling must be carefully checked and, if necessary,
the unit re-aligned with the motor.
Acoupling check and possible re-alignment is also
necessary if the pump and motor are supplied on a
common base plate and aligned.
Prior to alignment undo the support bracket 183
and then tighten it without stress.
The pump is to be aligned in all directions using a
spirit level (on shaft/discharge nozzle) (admissible
position deviation max. 0.2 mm/m).
Adistance depending on the coupling used is to be
observed between the pump and motor shafts.
See installation drawing.
Use supports in the direct vicinity of the bolts
foundation/base plate.
Ensure that the unit cannot be started during
work without the coupling guard.

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5.4 Piping
Before the pump is installed, both, the suction and
supply lines as well as the discharge line are to be
cleaned.
Dirt or damage to the sealing surfaces is best avoided
if the flange covers remain on the flanges until just
before installation.
Use flange gaskets suitable for the medium.
The screw tightening torques in Section 1.1 are to be
observed for tightening the flange screws.
5.4.1 Nominalsize
The operating design point of a centrifugal pump lies
at the intersection of the pump curve and the pipe
curve, see Fig. 2.The pump curve is provided by the
pump manufacturer. The pipe curve is determined
using diagrams or PC programs.
Fig. 2
Under no circumstances can the nominal size of the
piping be derived from the connected nominal size of
the pump.
The pipe nominal size can also be determined using
the flow rate as a rough guide.
The velocity in the suction line should not exceed 2.0
m/s and 5.0 m/s in the discharge line.
When determining the suction line nominal size, the
NPSH value (net positive suction head) must also be
observed. The NPSHR value required for the pump is
specified in the data sheet.
The NPSHR available in the plant
should be at least 0.5m higher than
the NPSHR required for the pump.
Otherwise, this will lead to a drop in the delivery head,
cavitation or even failure of the pump.
5.4.2 Nozzleloads
The pump can be subjected to nozzle loads in
accordance with ISO 5199. Werte siehe
Aufstellungsplan
Changes in the length of the piping caused by
temperature are to be allowed for by appropriate
measures, e.g. the installation of expansion joints.
5.4.3 Suctionline
The suction lines must always be laid on a rising
gradient towards the pump. Otherwise, gas bubbles
may form which considerably reduce the suction line
cross section. Eccentric transition elements must be
installed between different pipe diameters.
Valves which disrupt the course of flow should not be
installed directly upstream of the pump.
Fig. 3
5.4.4 Supplylines
Supply lines should vent towards the reservoir and are
therefore to be laid with a constant downward gradient
towards the pump. Should the piping internals
upstream of the pump be horizontal, a low point can,
of course, be located upstream of these internals.
From here the pipe is then laid with an upward
gradient to the pump so that the gas bubbles which
form here can escape through the pump.
Valves which disrupt the course of flow should not be
installed directly upstream of the pump.
5.4.5 Dischargeline
Do not arrange the shut-off valve directly above the
pump but initially provide a transition section.
The discharge nozzle velocity of the medium can – if
necessary – be reduced.
)m(A
)s/m(Q
)s/m(v 2
3
=

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5.4.6 Venting and evacuating
Venting can take place into the discharge line or
upstream of the discharge valve.
Aventing line can also be used as a bypass, drain or
flushing line.
The pump housing is fitted with a drain connection as
astandard feature. Optionally, the drain bore can be
drilled.
Fig. 4
5.5 Pipefittings
The following pipe fittings are available from Richter
on request:
Check valves
Shut-off valves
Sight glasses
Priming vessels
Strainers
Pressure gauges
Fig. 5
5.6 Monitoringfacilities
Appropriate monitoring facilities are to be
recommended, depending on the
requirements placed on operational safety
and availability of the unit.
Richter provides information on request and can
supply:
Flow meters
Filling level indicators
Motor load monitors
Temperature monitors
Rolling bearing monitors
Can monitors
Leak monitors
SAFERUN®Condition Monitoring System
You can obtain the publications "Safe Operation of
Magnetic Drive Pumps" and "The Operation of
Centrifugal Pumps without NPSH Problems" on
request.
5.7 Drive
The power consumption of the pump at the operating
design point is specified in the data sheet and works
certificate. If the operating design point was not known
when the pump was dispatched, the power
consumption can be read off the appropriate
performance curves. The max. density, the max.
viscosity and a safety margin are to be allowed for.
Care must be taken when selecting the motor size to
ensure that the excess power is not too great. During
start-up the magnetic drive could otherwise stop.
The magnetic drive rating at the required pump speed
is given in the pump data sheet.
If the motor rating exceeds this magnetic drive rating –
at pump speed -, it is necessary to check for any
stoppage of the magnetic drive.
This also applies if the required drive rating exceeds
80% of the magnetic drive rating – at pump speed.
Consult Richter if necessary.
Different operating data can be achieved without
changing the pump through the use of different
speeds, e.g. by means of a frequency converter.
The pump with base plate and motor is illustrated in
the installation drawing.
The operating manual of the motor manufacturer
must be observed.
Amotor with a valid ATEX certificate is to be
used if employed in zone 1 and 2.

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5.8 Coupling
If one coupling half engages with the other, the claw
section is normally to be mounted on the pump shaft
and the coupling half with the smooth end face on the
motor shaft.
Observe the operating manual of the coupling
manufacturer.
Acoupling with a valid ATEX certificate is to
be used if deployed in zone 1 and 2.
Regulations exist, e.g. for the following details:
Arrangement of the coupling halves
Max. bore diameter
Max. transmitted power
Spacing of the coupling halves
Maximum values for offset and angular
misalignment.
5.9 Finalcheck
Check the alignment of the coupling again in
accordance with Section 5.3.
It must be possible to easily turn the unit at the
coupling by hand.
5.10 Couplingguard
The pump may only be operated with a coupling
guard in accordance with the accident prevention
regulations.
It must be ensured that the coupling guard
used is either made of spark-free material or
the impact test required by the EN 13463 is
satisfied without any reservations.
Richter offers both versions.
The operator must ensure that, after the coupling
protection has been mounted, the requirements of the
machine guideline are fulfilled.
5.11 Electricconnection
The operator is obligated to connect the assembly in
accordance with existing regulations 8 (IEC,
VDE, etc.).
Allow only a trained electrician to perform the
electrical connection.
Compare the existing mains voltage with the
indications on the motor’s manufacturer’s nameplate
and choose a suitable circuit.
Amotor protection device (motor-circuit switch) is
urgently recommended.
Danger of explosion if the electrical
installation is incorrect.
In areas at risk of explosion, IEC 60079-14
must also be observed for the electrical
installation.
If the pump is mounted on a base plate, ensuring
electrical conduction through the use of a chopper
disk or contact disk on the housing foot and support
bracket.
The assembly must be grounded in accordance with
currently effective regulations, for example, on the
base plate.

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6 Commissioning/Shutdown
6.1 Initialcommissioning
Normally, the pumps have already been test-run with
water. Unless special agreements have been made,
there could still be residual amounts of water in the
pump. This must be noted in view of a possible
reaction with the medium.
Long life grease and grease lubrication
Adifference is made between long-life-grease
lubricated and regreasable rolling bearings.
If there are grease nipples on the bearing pedestal,
the rolling bearings must be regreased.
See Section 7.2.2.
If there are no grease nipples, the rolling bearings
have long-life grease lubrication. Regreasing is not
possible and not necessary. See Section 7.2.1.
Oil bath lubrication
Pour in oil into the bearing pedestal!
For procedure and the oil grade, see Sections 7.2
and 7.8.5.
6.1.1 Filling the pump housing
Check to see whether the screws on the suction
flange, discharge flange, housing flange and drain
flange are tightened.
When retightening the housing screws, make sure
that the support bracket is undone. Otherwise, the
pump could be deformed.
For screw tightening torques see Section 1.1.
Open the suction line fully so that the medium can
flow into the pump.
Open the discharge valve so that the air in the
pump can escape.
If air cannot be vented into the discharge line, e.g.
adrop in pressure in this line is not permitted,
venting must be performed upstream of the
discharge valve.
Monitor the venting operation until no air but only
liquid emerges.
Turn the pump shaft at the coupling several times.
Monitor the venting operation again until no more
air emerges.
Close the discharge valve again until only
the minimum flow rate is obtained after
the motor has been started.
6.1.2 Start-up
Check to see whether the pump shaft
can be readily turned by hand.
Check the direction of rotation of the
motor with the coupling disengaged or with a rotary
field instrument.
As viewed from the motor, the direction of rotation
ofthe pump is clockwise. See also the direction of
rotation arrow of the pump.
The pump must not run dry during the check
of the direction of rotation.
Check alignment of the coupling.
Mount coupling guard.
The pump must be completely filled with liquid.
The maximum admissible flow rate must not
be exceeded.
Otherwise the plain bearings can run dry in
both cases.
Switch the motor on.
Set the desired flow by opening the discharge valve.
When the motor is running but the pump is not
conveying, this means that the magnetic drive
has stopped.
Switch motor off immediately in order to prevent
overheating of the magnet assemblies.
Then proceeded as follows:
Close discharge valve down to the position
"minimum flow rate"
Start motor again.
If the magnetic drive stops again, look for the cause.
6.2 Operatinglimits
The operating limits of the pump/unit in terms
of pressure, temperature, power and speed
are entered in the data sheet and it is
imperative to observe them!
6.2.1 Abrasivemedia
If liquids with abrasive constituents are
conveyed, increased wear at the pump is to
be expected. The inspection intervals should
be reduced compared with the usual times.
6.2.2 Min./max. flow rate
The operating range generally recommended lies at
0.3 Qopt to 1.1Q
opt.Consult the manufacturer for
operation outside this range and observe Section
2.6.2.

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6.3 Shutdown
Close discharge valve down to the position
"minimum flow rate"
Switch motor off.
Close discharge valve completely.
Only close the suction line if the pump is to
be evacuated or dismantled.
For all work on the machine, make sure that
the motor cannot be inadvertently switched
on.
If the pump is to be evacuated or flushed,
observe the local regulations.
If the pump has been operated with a chargeable
liquid, it must be filled with inert gas (e.g. nitrogen) to
prevent an explosive atmosphere.
It is recommended to wait one hour before the pump
is dismantled from the plant to permit static peak
charges to be eliminated.
It is recommended to wait one hour before the pump
is dismantled from the plant to permit static peak
charges to be eliminated.
If the pump is returned to the manufacturer's, clean
the pump very thoroughly.
See also Section 3.1.
6.4 Restarting
When the pump is restarted, it must be ensured that
all the relative steps as described in Section 6.1 are
repeated, depending on the progress of the shutdown
operation.
6.5 Improper operations and their
consequences (examples)
Improper operation, even for brief periods,
may result in serious damage to the unit.
In connection with explosion protection,
potential sources of ignition (overheating, electrostatic
and induced charges, mechanical and electric sparks)
can result from these inadmissible modes of
operation; their occurrence can only be prevented by
adhering to the intended use.
Pump is started up without medium :
The plain bearing in the pump may be destroyed.
Other pump components may be destroyed due to
overheating.
Operation with magnetic drive stopped:
If no heat is dissipated, damage to the inner and
drive magnet assemblies may occur.
Suction line not opened or not opened fully :
Pump is cavitating – material damage to pump and
plain bearings
Pump does not attain the required delivery head or
flow rate.
Pump may be destroyed due to overheating.
Discharge valve opened too much :
Pump may be destroyed due to overheating.
Axial thrust too great.
Discharge valve closed too much :
Pump can cavitate. Particularly severe with an
empty discharge line.
Risk of pressure surge.
Possible damage to the plain bearings.
Magnetic drive may stop.
Motor may be overloaded.
Suction valve and discharge valve closed :
Destruction due to rapid overheating and sharp
rise in pressure.
Control of the pump with the suction valve :
Cavitation – the volume may only be regulated on
the discharge side.
Overrun of the admissible gas content:
The flow may stop.
Switch pump and vent off for renewed
conveyance.
Make sure that the gas content is not exceeded, as
described in the intended use

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7Maintenance
7.1 Screw connections of the
housing
After initial loading by the operating pressure and
operating temperature the tightening torques of all
connection screws must be checked at the following
points:
housing flange
suction flange
discharge flange
See also Section 6.1.1, para. 1.
Other inspections are to be performed regularly,
depending on the operating requirements.
7.2 Bearingpedestal
The temperature of the bearing pedestal is
not to exceed more than 70 °C and under no
circumstances 80 °C.
At higher temperatures, call in qualified staff without
delay. If this is not possible, the pump must be shut
down and taken out of service.
In many cases it is also recommended to measure
vibration in order to detect bearing wear in good time
7.2.1 Long-life grease lubricated rolling
bearings
Grease fill bearings of the series 2RS are installed as
standard features. The grease is lithium-saponified.
The admissible temperature range is –30°C to
+110 °C.
The rolling bearings are designed for an L10 service
life of >17,500 hours. The service life of the grease
filling guaranteed by the bearing manufacturers is
given in the following table.
Size Bearing size > Service life
Group 4 6314-2RS / 15000 hr*
*at bearing temperature <50 °C
at bearing temperature 70 °C approx. 7500 hr
If the pump is serviced, it is recommended to also
replace the bearings as a precaution.
In potentially explosive works it is
advisable to monitor the condition of
the rolling bearings
7.2.2 Regreasable rolling bearings
Optionally, the bearing pedestal can be provided with
regreasable rolling bearings. In this case there are
grease nipples on the bearing pedestal by means of
which regreasing must be performed both initially and
every 5000 hours of operation.
For this purpose we recommend the use of 100 cm3of
SKF lubricating grease type LGWA 2.
Mixing with other lubricants should definitely be
avoided.
The bearing service life is >17,500 hours of operation
assuing proper lubrication.
7.2.3 Oilbathlubrication
The temperature of the bearing pedestal is
not to exceed more than 70 °C and under no
circumstances 80 °C.
If higher temperatures do occur, call in qualified staff
without delay. If this is not possible, the pump must be
shut down and taken out of service.
In many cases a vibration measurement is
recommended to detect bearing wear in good time.
With an expected bearing temperature of about 70°C
we recommend a mineral oil with the following
characteristics:
Viscosity index : approx. 85
Kinematic viscosity at 40°C : approx.
s
2
mm
40.ca
Afully synthetic gear oil to ISO VG 220 is to be used
for temperatures below – 20 °C.
Replacing the bearings: The rolling bearings are
designed for an L10 service life of >17,500 hours.
We recommend 17.500 working hours respectively
every 3 years a change of bearing should be made.
Oil changes: 1x per year at bearing temperatures up
to 50 °C.
Every 6 months at bearing temperatures up tot 70 °C.
At higher temperatures more frequently in accordance
with the regulations.
When the pump is serviced, it is recommended to
replace the bearings and shaft seals as a precaution
and to pour in fresh oil.
Oil level check: The oil level is to be regularly
checked on the constant level oiler 638/1 to ensure
safe operation.
It must be ensured that there is always oil in the
constant level oiler; it must under no circumstances be
completely drained.
In potentially explosive works it is
advisable to monitor the condition of
the rolling bearings
If there is a suspicion that splash water could have
entered the bearing pedestal, the oil must be replaced
immediately. Even small amounts of water in the oil
reduce the service life of the rolling bearings to a
fraction of the normal service life.

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7.3 Cleaning
Care must be taken when cleaning the pump to
ensure that it is not exposed to a strong water jet.
The ingress of water into the bearing pedestal will
substantially impair ball bearing lubrication.
7.4 Stand-bypumps
If a pump is on stand-by, it is to be started up from
time to time. Regularly turn the shaft by hand in the
direction of rotation.
This operation is to be performed more often for
pumps which are exposed to very strong vibrations
from the plant.
When dismantling the pump from the plant, drain it,
thoroughly clean it, seal with flange covers and store
in accordance with the instructions.
7.5 Notes on dismantling
All repair and maintenance work is to be performed
by skilled staff using appropriate tools and original
spare parts.
Is the necessary documentation available?
Has the pump been shut down, drained and
flushed in accordance with the regulations?
See also Section 6.3.
If no new assembly is performed immediately after
dismantling, the plastic and ceramic components in
particular must be stored carefully.
7.5.1 Protectiveclothing
Even if the pump has been properly
evacuated and flushed, residue of the
medium may still remain in the pump, e.g.
between sealing surfaces or in the bearing seats or in
the can or the can insert.
Plastic components may absorb medium which
gradually emerges from the material after flushing.
Proper protective clothing is to be worn.
Protective clothing is also to be worn even if only the
bearing pedestal is to be removed. Medium may
penetrated the lantern chamber through the can.
7.5.2 Magneticfields
Caution! Strong magnetic fields
Risk during dismantling and in the vicinity of
magnetic drives as single parts.
Remove loose parts and other magnetisable metals
from the work bench. They could otherwise be
attracted: Risk of accident
!
Place any tools needed at a safe distance.
Keep electronic equipment and measuring
instruments at a distance. In cases of doubt consult
the equipment manufacturer.
Hold magnetic drives as single parts firmly or secure.
Otherwise they could be attracted, for example, by a
vice: Risk of accident!
People with an artificial pacemaker
Keep torso at a minimum distance of
500 mm.
For safety's sake, a distance of 150 mm should be
observed for watches, electric data carriers, data
carriers with magnetic strips etc.
7.6 Dismantling
There are three possibilities for dismantling:
1. Dismantling the complete pump from the plant.
2. Dismantling the complete slide-in unit as the pump
housing can remain in the plant connected to the
piping.
3. Dismantling the complete drive unit from the plant.
The pump does not need to be drained.
Dismantling of the complete pump is described here.
For the design and individual parts of the pump, see
the exploded drawing in Section 9 and the sectional
drawing in Section 10.
If the coupling installed is a spacer-type coupling, the
motor can also remain in the plant.
Undo support bracket 183 from the base plate.
Undo housing screws 901/3,552/3
Remove entire slide-in unit.
If the housing 100 remains in the plant, leave the
housing gasket 401 in the centering to protect the
housing sealing surface.
Caution!
When pulling out the slide-in unit, this component
must be secured against falling.
The integrated crane hook lug on the lantern can be
used for this purpose.
Or use the optionally available sliding and support
pedestal. See assembly aids in Section 11.4.
Dismantling of the complete pump is described here.
For the design and individual parts of the pump, see
the exploded drawing in Section 9 and the sectional
drawing in Section 10.
If the coupling installed is a spacer-type coupling, the
motor can also remain in the plant.
Undo support bracket 183 from the base plate.
Undo housing screws 901/3,552/3
Remove entire slide-in unit.
If the housing 100 remains in the plant, leave the
housing gasket 401 in the centering to protect the
housing sealing surface.

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Caution!
When pulling out the slide-in unit, this component
must be secured against falling.
The integrated crane hook lug on the lantern can be
used for this purpose.
Or use the optionally available sliding and support
pedestal. See assembly aids in Section 11.4.
The operating torque of the magnetic coupling
installed is specified on the type plate.
7.6.1 Dismantling the slide-in unit
Transport the slide-in unit using the crane hook lug
moulded on the lantern.
As an adiitonal aid, the ring bolt provided can be
screwed into the bearing pedestal flange at 12
o'clock.
Beforehand, remove the threaded sealing cap.
As a result, two slinging aids are available.
Secure slide-in unit on a work bench or a work top.
Remove attachment screws 901/17 with washers
554/11.
Remove threaded sealing cap from the tapped
bores of the bearing pedestal flange.
Insert the two assembly threaded rods M 16
provided.
Using the flat pivot point on the threaded rods and
an open-jaw wrench (size 13), push the slide-in
unit out of the lantern chamber. While doing so,
turn the threaded rods evenly and alternately.
Caution! Magnetic forces!
Risk of accident !
Transport the drive unit using a crane. The ring
bolt on the bearing pedestal flange can be used for
this purpose.
Position the rest of the slide-in unit vertically with
the impeller facing down.
Remove screws 901/10 and lift off lantern 344,can
159 and can insert 158.
Clamp the plain bearing pedestal 339 with the
sealing surfaces in a vice.
It is imperative to use rubberised clamping
jaws so that the plastic sealing surfaces
are not damaged.
Undo impeller 230 and inner magnet assembly 859
by turning them in opposite directions. Right-hand
thread!
Either two strap wrenches or, even better,
appropriate special tools (see Assembly aids in
Section 11.3)are used for this purpose.
With magnetic drives >400Nm the use of the
special tool is generally recommended.
Depending on whether the impeller 230 or the
inner magnet assembly 859 has been removed
from the pump shaft 211, a section of the pump
shaft can be raised or the pump shaft is pulled out
of the plain bearing pedestal 339 with the other
component.
This operation must be performed carefully as
plain bearing parts made of silicon carbide may be
removed unintentionally.
Make sure that no parts of the plain
bearing fall. Silicon carbide is easy to
break.
Clamp pump shaft 211 with the flat pivot point in a
vice. Use smooth vice jaws for this purpose.
Depending on which component has remained
connected to the pump shaft, unscrew the impeller
230 or the inner magnet assembly 859. A strap
wrench or the special tool suitable for the
component can be used for this purpose.
An appropriate Richter jig can be used to remove
the bearing bushes 545/1 and 545/2.See
Assembly aids in Section 11.2.
The can 159 and can insert 158 should only be
separated if one component has to be replaced.
The separation process can be simplified by
cooling the unit to approx. 5 °C.
With a vacuum-tight design it is not possible to
separate the can insert as it and the can are glued
together.
7.6.2 Dismantling the drive unit
Long life grease and grease
lubrication
Remove the hex. socket screw 914/5 with the lock
washer 934/4 and pull the drive magnet assembly
858 off the drive shaft 213.For this purpose do not
use any magnetisable tools.
Caution! Magnetic forces!
Risk of accident !
Remove hex. socket screws 914/6 and pull off the
rear bearing cover 361.
Remove wavy spring washer 953/1.
Pull or push the drive shaft 213 with the rolling
bearings 321/1 and 321/2 out of the bearing
pedestal 330 in the direction of the motor.
To change the rolling bearings 321/1 and 321/2,
they have to be pushed off the drive shaft 213.
Optional
The pump can be provided with regreasable
bearings. In this case there are rotary shaft seals
421/1 and 421/2 in the bearing pedestal 330 and in
the rear bearing cover 361. See Section 10.2.
The mating surfaces of the rotary shaft seals are
made of chromium-oxide-coated steel rings which
can be replaced, if necessary, at the works.

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7.6.3 Dismantling the drive unit
Oil bath lubrication
Remove the hex. socket screw 914/5 with the lock
washer 934/4 and pull the drive magnet assembly
858 off the drive shaft 213. For this purpose do not
use any magnetisable tools.
Caution! Magnetic forces!
Risk of accident !
Remove hex. screw 901/4 and drain oil.
Remove hex. socket screws 914/6 and pull off the
rear bearing cover 361 with the rotary shaft seal
421/1 and O-ring 412/1.
Remove wavy spring washer 953/1.
Pull or push the drive shaft 213 with the rolling
bearings 321/1 and 321/2 out of the bearing
pedestal 330 in the direction of the motor.
To change the rolling bearings 321/1 and 321/2,
they have to be pushed off the drive shaft 213.
If necessary, press the rotary shaft seals 421/1
and 421/2 out of the bearing pedestal 330 and rear
bearing cover 361.
The mating running surfaces of the rotary shaft
seals are made of chromium-oxide-coated steel
rings which can be replaced by the manufacturer if
required.
We recommend you to also replace the rotary
shaft seals 421 when the bearings are being
replaced.
7.7 Notes on assembly
Use original spare parts. See also Section 2.4.
Do not use defective parts.
Has the pump been shut down, drained and
flushed in accordance with the regulations?
See also Section 6.3.
Apply Anti-Seize special assembly paste (e.g. from
Weicon) to the fitting surfaces and screw thread
prior to assembly.
The thread in the impeller 230,the inner magnet
assembly 859 and on the pump shaft 211 must not
be greased as otherwise no optimum glued
connection is possible.
The bushes 523/1 in the impeller 230 and 523/2 in
the inner magnet assembly 859,the O-rings 412
and the housing gasket 401 as well as the rotary
shaft seals 421 should always be replaced.
Important dimensions on centrings, bearing fits or
bearing play must be checked prior to final
assembly. If necessary, perform a trial assembly.
For the design and single components, see
exploded drawing in Section 9 and sectional
drawing in Section 10.
Many metallic particles adhering to magnetic
components such as the inner magnet assembly
859 and drive magnet assembly 858 must be
removed prior to assembly. For this purpose
simple plasticene can be used..
Acomplete assembly process is described in the
following. Sub-sections can be deduced from this.
7.8 Assembly
7.8.1 Assembly of drive unit
Long life grease and grease
lubrication
Press radial ball bearings 321/1 and 321/2 onto the
drive shaft.
Push drive shaft unit into the bearing pedestal 330,
mount wavy spring washer 953/1 and rear bearing
cover 361 and tighten all components with the hex.
socket screws 914/6.(Torque 15 Nm)
Optional
The drive unit can be provided with rotary shaft
seals (421/1 and 421/2). (Grease lubrication with
regreasable rolling bearings). In this case a rotary
shaft seal must be pressed into the bearing
pedestal 330 and one into the rear bearing cover
361.
Position bearing pedestal unit vertically and secure
(e.g. in a vice).
Secure drive magnet assembly 858 on the drive
shaft 213 on the flat pivot point.
Caution! Magnetic forces!
Risk of accident !
Insert wavy spring washer 934/4 and tighten the
hex. socket screw 914/5 to a torque of 40 Nm. For
this purpose, do not use any magnetisable tools if
at all possible.
7.8.2 Assembly of drive unit
Oil bath lubrication
Screw hex. screw 901/4 into the bearing pedestal
330.
Insert rotary shaft seal 421/2 into the bearing
pedestal 330.
Insert rotary shaft seal 421/2 and O-ring 412/1 into
the rear bearing cover 161.
Press rolling bearings 321/1 and 321/2 onto the
drive shaft 213.
Push drive shaft unit into the bearing pedestal 330,
mount wavy spring washer 953/1 and rear bearing
cover 361 and tighten all components with the hex.
socket screws 914/6. (Torque 15 Nm)
Position bearing pedestal unit vertically and secure
(e.g. in a vice).

Series MNK 200-150-315 Page 20
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Secure drive magnet assembly 858 on the drive
shaft 213 on the flat pivot point.
Caution! Magnetic forces!
Risk of accident !
Insert wavy spring washer 934/4 and tighten the
hex. socket screw 914/5 to a torque of 40 Nm. For
this purpose, do not use any magnetisable tools if
at all possible.
7.8.3 Trial assembly of the slide-in unit
Without adhesive
Without O-rings 412/3, 412/4
For assembly, see Section 7.8.3.
Dismantled trial-assembled unit and perform
assembly.
7.8.4 Assembly of slide-in unit
With the O-rings 412/3,412/4
With 1 drop of adhesive on each shaft thread, e.g.
Loctite 243 from Loctite or an equivalent.
Only one drop of the adhesive is to be applied per
thread.
Otherwise the next dismantling operation will be
more difficult or no longer possible without
destroying components.
The mating surfaces of pump shaft/inner magnet
assembly and pump shaft/impeller must be
completely clean.
Place impeller 230 with the suction side facing
downwards on the work bench.
Press shaft sleeve 523/1 into the impeller 230.
Insert O-ring 412/3 into the appropriate groove in
the impeller 230.
Check whether the mating surfaces of the pump
shaft 211 and impeller 230 are absolutely clean
and the thread is burr-free.
Provide one thread turn of the pump shaft 211 with
adhesive, e.g. Loctite 243.
Screw pump shaft 211 into the impeller 230.
Clamp pump shaft 211 with the flat pivot point in a
vice. Use smooth vice jaws for this purpose.
Tighten the impeller 230 using a strap wrench or
appropriate special tool (see Section 11.3).
Place the assembled unit in turn, with the suction
side of the impeller 230 facing downwards, on the
work bench.
Push bearing sleeve 529/1 over the pump shaft
211 and position the flat pivot point in the impeller
230.
Push the bearing bush 545/1 onto the bearing
sleeve 529/1.
Push axial bearing 314/1 onto the pump shaft 211.
Move plain bearing pedestal 339 into assembly
position using a crane. For this purpose the 4 M10
tapped bores on the motor side can be used as a
slinging aid (ring bolt etc.).
Carefully lower the plain bearing pedestal 339
centrally over the pump shaft 211.Make sure that
the positive connections of the axial bearing 314/1
and the bearing bush 545/1 engage properly. If
assembly is performed correctly, there is a
distance of approx. 3 mm between the impeller
230 and the plain bearing pedestal 339.
Push the axial bearing 314/2 over the pump shaft
211 and position in the plain bearing pedestal 339.
Insert bearing bush 545/2 into the plain bearing
pedestal 339.
Press shaft sleeve 523/2 into the inner magnet
assembly 859.
Push O-ring 412/4 over the pump shaft 211.
Check whether the mating surfaces of the pump
shaft 211 and inner magnet assembly 859 are
absolutely clean and the thread is burr-free.
Provide one thread turn of the pump shaft 211 with
adhesive, e.g. Loctite 243.
Push bearing sleeve 529/2 half its length onto the
pump shaft 211.
Carefully screw inner magnet assembly 859 onto
the pump shaft 211.It is imperative to ensure that
the flat pivot point of the bearing sleeve 529/2
engages the positive connection of the inner
magnet assembly 859 and thus also turns during
the screwing process.
Using a strap wrench or special tool, screw the
inner magnet assembly 859 and the impeller 230
firmly together.
The axial play Zof the plain bearings is 0.4 to
1.3 mm. See sectional drawing Section 10.1.
7.8.5 Finalassembly
Transport the drive unit using a crane. The ring
bolt on the bearing pedestal flange can
be used for this purpose.
Screw the two assembly threaded
rods M 16 provided into the tapped bores of the
bearing pedestal flange.
Press the drive unit into the lantern chamber using
the flat pivot point of the threaded rods and an
open-jaw wrench (size 13). The threaded rods
must be turned evenly and alternately provided
can be screwed into the bearing pedestal flange at
12 o'clock.
Beforehand, remove the threaded sealing cap.
As a result, two slinging aids are available.
Push the entire slide-in unit with housing gasket
401 into the housing 100 and screw together with
housing screws 901/3 and tightening washers
552/3.