Masdaf NMM Series User manual

NMM SERIES
Operating
Manual
Monoblock Centrifugal Pumps
May/2021Revision No: ??

2

NMM Series
TABLE OF CONTENTS Page No
3
Introduction 3
1. Important Safety Precautions 3
2. General 4
3. Safe Operating Conditions 5
4. Technical Information 5
5. Transport and Storage 6
6. Assembly/Installation 7
6.1. Installation 7
6.2. Fixing (Securing) Of Pump Group 7
6.3. Piping 7
6.4. Motor Connection 8
7. Commissioning, Start up and Operating 9
7.1. Preparations Before Start up 9
7.2. Checking The Direction of Rotation 9
7.3. Start up Procedure 9
7.4. Shut Down Procedure 10
8. Maintenance 10
8.1. The Checks During the Operation 10
8.2. Service 11
8.3. Spare Parts 11
9. Noise Level and Vibration 11
10. Disassembly, Repair and Reassembly 11
11. Possible Failures, Causes, Solutions 13
12. Pump Dimensions Table 14
13. Tightening Torques 20
14. Forces And Moments at The Pump Flanges 20
15. Sample Plumbing 22
16. NMM Sectional Drawing and Part List 23
17. NMM Drawing for Dismantling 25
18. NMM Series MEI Values Table 27
INTRODUCTION
• This manual contains instructions for the installation,
operation and maintenance ofthe NMM type horizontal
single stage, non-self priming centrifugal pumps of
MAS DAF MAKINA SANAYI A.Ş.
• Please read carefully this manual and apply all the
instructions to operate pumps without problems.
Pumps shall be used for their intended duties. In this
manual, there are information on operating
conditions, installation, starting-up, settings and main
controls of pumps.
• These operating and maintenance instructions
contain MAS DAF MAKINA SANAYI A.Ş. ` s suggestions.
The special operating and maintenance information of
the plumbing that a pump is fitted to is not considered
in these instructions. This information must be given
by the plumbing constructors only.
• Please refer to instructions of plumbing constructors.
• Please pay attention to the warnings in this manual
and ensure that it is read before the installation-start
up process. MAS DAF MAKINA SANAYI A.Ş. is not
responsible for the accidents resulting from negligence.
• If you cannot find an answer to your questions in this
manual, it is suggested that you contact MAS DAF
MAKINA SANAYI A.Ş. Please inform us about the rated
value and especially the serial number of the pump
when you get in contact for help.
• The safety instructions in this manual cover the current
national accident protection regulations. Beside all of
these, an operation, work and safety measure imposed
by the costumer has to be applied.
The Signs Used in This Operation Manual
Read the instructions carefully in this
operating manual and keep it for your
future reference.
Warning sign against the electrical risks
Sign for the operator’s safety
1. IMPORTANT SAFETY PRECAUTIONS
In order to minimize the accidents during the mounting
and putting into service of the pump, the following rules
have to be applied:
1. Do not work without taking safety measures
relevant to equipment. Cable, mask and safety band
must be used when necessary.
2. Be sure there is adequate amount of oxygen and
there is no toxic gaseous around
3. Before using welding or any electrical equipment
make sure that there is no risk of explosion.
4. Check the cleanliness of the area to take care of your
help. (Dust, smoke, etc.)
5. Do keep in mind that there is a risk of having
accidents related to electricity
6. Do not lift the pump before you check the transport
equipment.
7. Be sure you have a by-pass line
8. Use helmet, eye glasses and protective shoes for
your safety
9. Place a protective barrier around the pump within
the necessary safety area
10. Dust, liquids and gaseous that may cause overheat-
ing, short circuit, corrosion and fire must be kept away
from the pump unit.
11. By checking the noise level of the pump unit,
necessary measures to avoid noisy operation of the
pump that can have harmful effects on the personnel
and environment.
12.Be careful about the direction of transport and
storage.
13.Cover appropriately the moving parts to avoid
possible injury of the personnel. Mount the coupling
guard and belting before starting-up the pump
14. All the electrical and electronic applications must be
performed by authorized person conforming
EN60204-1 and /or domestic instructions.
15. Protect the electrical equipment and motor against
overloading
16.If flammable and explosive liquids are pumped,
ground connection of electricity should be carried out
properly
17. Do not expose the pump unit to sudden temperature
variations

KYP Serisi
4
Introduction 3
1. Important Safety Precautions 3
2. General 4
3. Safe Operating Conditions 5
4. Technical Information 5
5. Transport and Storage 6
6. Assembly/Installation 7
6.1. Installation 7
6.2. Fixing (Securing) Of Pump Group 7
6.3. Piping 7
6.4. Motor Connection 8
7. Commissioning, Start up and Operating 9
7.1. Preparations Before Start up 9
7.2. Checking The Direction of Rotation 9
7.3. Start up Procedure 9
7.4. Shut Down Procedure 10
8. Maintenance 10
8.1. The Checks During the Operation 10
8.2. Service 11
8.3. Spare Parts 11
9. Noise Level and Vibration 11
10. Disassembly, Repair and Reassembly 11
11. Possible Failures, Causes, Solutions 13
12. Pump Dimensions Table 14
13. Tightening Torques 20
14. Forces And Moments at The Pump Flanges 20
15. Sample Plumbing 22
16. NMM Sectional Drawing and Part List 23
17. NMM Drawing for Dismantling 25
18. NMM Series MEI Values Table 27
INTRODUCTION
• This manual contains instructions for the installation,
operation and maintenance ofthe NMM type horizontal
single stage, non-self priming centrifugal pumps of
MAS DAF MAKINA SANAYI A.Ş.
• Please read carefully this manual and apply all the
instructions to operate pumps without problems.
Pumps shall be used for their intended duties. In this
manual, there are information on operating
conditions, installation, starting-up, settings and main
controls of pumps.
• These operating and maintenance instructions
contain MAS DAF MAKINA SANAYI A.Ş. ` s suggestions.
The special operating and maintenance information of
the plumbing that a pump is fitted to is not considered
in these instructions. This information must be given
by the plumbing constructors only.
• Please refer to instructions of plumbing constructors.
• Please pay attention to the warnings in this manual
and ensure that it is read before the installation-start
up process. MAS DAF MAKINA SANAYI A.Ş. is not
responsible for the accidents resulting from negligence.
• If you cannot find an answer to your questions in this
manual, it is suggested that you contact MAS DAF
MAKINA SANAYI A.Ş. Please inform us about the rated
value and especially the serial number of the pump
when you get in contact for help.
• The safety instructions in this manual cover the current
national accident protection regulations. Beside all of
these, an operation, work and safety measure imposed
by the costumer has to be applied.
The Signs Used in This Operation Manual
Read the instructions carefully in this
operating manual and keep it for your
future reference.
Warning sign against the electrical risks
Sign for the operator’s safety
1. IMPORTANT SAFETY PRECAUTIONS
In order to minimize the accidents during the mounting
and putting into service of the pump, the following rules
have to be applied:
1. Do not work without taking safety measures
relevant to equipment. Cable, mask and safety band
must be used when necessary.
2. Be sure there is adequate amount of oxygen and
there is no toxic gaseous around
3. Before using welding or any electrical equipment
make sure that there is no risk of explosion.
4. Check the cleanliness of the area to take care of your
help. (Dust, smoke, etc.)
5. Do keep in mind that there is a risk of having
accidents related to electricity
6. Do not lift the pump before you check the transport
equipment.
7. Be sure you have a by-pass line
8. Use helmet, eye glasses and protective shoes for
your safety
9. Place a protective barrier around the pump within
the necessary safety area
10. Dust, liquids and gaseous that may cause overheat-
ing, short circuit, corrosion and fire must be kept away
from the pump unit.
11. By checking the noise level of the pump unit,
necessary measures to avoid noisy operation of the
pump that can have harmful effects on the personnel
and environment.
12.Be careful about the direction of transport and
storage.
13.Cover appropriately the moving parts to avoid
possible injury of the personnel. Mount the coupling
guard and belting before starting-up the pump
14. All the electrical and electronic applications must be
performed by authorized person conforming
EN60204-1 and /or domestic instructions.
15. Protect the electrical equipment and motor against
overloading
16.If flammable and explosive liquids are pumped,
ground connection of electricity should be carried out
properly
17. Do not expose the pump unit to sudden temperature
variations
18.All personnel who work with the waste water
system need to be vaccinated in case of contagious
diseases.
19.If the pump contains hazardous liquids, one must
use protective helmet against the risk of splatter. One
also must accumulate the liquid in a proper container
against any risk of leakage.
All Other Health and Safety Rules, Laws and
Regulations Must Be Applied
2. GENERAL
2.1. Definition of Pump and Usage Areas
NMM series pumps are single stage, close coupled
volute type pumps. They are used in
• Water networks and pressurization facilities
• Irrigation, sprinkling and drainage systems
• Filling –Draining of tanks and reservoirs
• Hot and Cold water circulation in heating and cooling
systems.
• Condense water pumping
• Water circulations in pools
• Health purification facilities
• Industrial and social facilities
• Fresh and sea water pumping in ships.
They shall be used to pressurize liquids (up to 120°C)
which are clean or mildly impure, non abrasive, and not
containing large solid particles or fiber.
CAUTION
Please contact MAS DAF MAKINA SANAYI A.Ş. for
liquids that have different chemical and physical
specifications.
NMM type centrifugal pumps are comprised of 29
types which conform to DIN 24255 (EN 733) standards.
Technical specifications of NMM type pumps
Suction Flange: DN 50 – DN 150
Discharge Flange: DN 32 – DN 125
Operating Pressure: 10 Bar
Operating Temperature: -25 – 120°C
Capacity: 5 – 400 m³ / h
Hm: 4 - 110 m
Speed: 1450 – 2900 RPM
Product Information as per Regulation No. 547/2012 (for
Water Pumps with a Maximum Shaft Power of 150 kW)
Implementing "Ecodesign" Directive 2009/125/EC
Minimum Efficiency Index for MAS NMM Pump Series is
shown on the pump label.
MEI values of MAS NMM Pump Series are shown on the
pump characteristic curves.
Minimum Efficiency Index for MAS NMM Pump Series;
Minimum 0.4. (MEI≥0,4)
Efficiency values of the pump characteristic curves, which
are cut diameter, are expressed in %.
NMM Series water pumps, the pump efficiency can be
achieved more than fix speed in case of variable speed
control.
More information about the Ecodesign can be reached at
www.europump.org
Figure 1: Pump Label
2.2. Performance Information
Actual performance of the pump can be obtained from
the order page and/or from the test report. This
information is given on the pump label.
The performance curves given in the catalog are valid
for water whose density and viscosity are ρ=1 kg/dm3
and ν=1 cst. respectively. For those liquids whose
densities and viscosities are different from those of
water, please consult with MAS DAF MAKINA SANAYI
A.Ş. since the performance curves varywith density and
viscosity
CAUTION
Do not operate the pump with a motor that has a
different power except for the given catalog and
label values.
The pump is not to be operated at off-design point
given in the order and supplied from the firm.
It is necessary to ensure that the instructions are
obeyed for the safe running of the pump.
2.3. Warranty Conditions
The entire products in ourselling program are warranted
by MAS DAF MAKINA SANAYİ A.Ş.

NMM Series
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The warranty conditions will only be valid when all the
instructions about installation and start-up operations
of the pump unit are taken into account.
2.4. Test
All Pumps are dispatched for sale when all the
performance and pressure tests are completed. Proper
assurance of material and fault-free operation of
pumps whose performance tests are made is under the
warrantyof MAS DAF MAKINA SANAYI A.Ş.
2.5. Pressure Limit
Pressure at the discharge flange must not exceed 10
Bar. A special order is necessary for applications with
higher pressures.
3. SAFE OPERATING CONDITIONS
This manual contains main safety instructions for the
installation, operation and maintenance. It must be
read by the personnel who are responsible for installa-
tion and operation. This manual should always be kept
near the installation location. It is important to comply
with safety precautions stated in page 1 along with the
general safety instructions as well as preventive
measures repeated in other sections of this manual.
3.1. Training of Personnel
Installation, operation and maintenance personnel
must have necessary knowledge in order to accomplish
the given job. The responsibility, adequacies and
controlling duties of such personnel must be
determined by the costumer. It has to be certain that
these personnel comprehend totally the content of the
operating manual.
If the personnel do not have enough knowledge,
required training must be given by the costumer. If
training support is needed by the costumer, it will be
provided by the manufacturer/seller.
CAUTION
Untrained personnel and unwillingness to comply with
safety instructions may be risky for both machine and
environment. MAS DAF MAKINA SANAYI A.Ş. is not
responsible for this kind of damages.
3.2. Hazardous Conditions That May Occur When One
does not Comply With the Safety Instructions
Incompliance with safety regulations may put the
personnel, the environment and the machine in danger
and thus may cause damages. Incompliance with safety
regulations may give rise to situations listed below.
Important operational functions of the factory may
stop.
Maintenance may get difficult.
One may get injured by electrical, mechanical or
chemical hazards.
3.3. Safety Measures for Operator
Dangerous, hot or cold components in the pump area
must be covered so that one cannot touch them.
Moving components of the pump must be covered so
that one cannot touch them. Those covers must not be
dismounted while the pump is running. Dangers that
results from electrical connections must be removed.
To get more information about this subject, you can
refer to domestic electrical instructions.
3.4. Safety Measures for Maintenance and Installation
The costumer must assure that all maintenance, check
and installment tasks are performed by qualified
personnel. Repair work must only be performed while
the machine is not running.
The pump and its auxiliary system must be cleaned
thoroughly if it contains hazardous liquids. At the end of
the repair work, all safety and protective equipment
must be re-installed.
3.5. Spare Parts Replacement
Replacement of spare parts and all modifications must
be done after contacting with the manufacturer. Spare
parts and accessories certified by the manufacturer are
important for the safe operation of the system.
Notice: MAS DAF MAKINA SANAYI A.Ş. is not responsible
from the usage of improper spare parts.
4. TECHNICAL INFORMATION
4.1. Design
These are close coupled, single stage, single suction
with a horizontal opening and a vertical discharge
opening volute type (with horizontalshaft) pumps. They
have closed radial impellers and their casing sizes are in
accordance to DIN 24255 and EN 733 standards.
4.1.1. Locations of Flange – Flanges
Suction Flanges: In axial direction DN50-DN150
Discharge Flanges: Radially upward DN32-DN125
Standard of Flanges: TSE EN 1092-2
4.1.2. Connection of Pump and Motor
Motor is close coupled to the pump with a rigid coupling
using and an adapter and flange. In this way, the shafts
of the motor and pump constitute a complete unit.

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4.1.3. Impeller
The closed radial type impeller of the pump is balanced
dynamically in an electronic balance machine. The
thrust (axial force) is balanced with the back wear ring
and balance holes.
4.1.4. Shaft
The shaft, impeller and other parts of the pump is
designed to be dismountable without moving (dislodge)
the suction and discharge pipes and volute of the pump.
In this way, the installation and maintenance
operations can be performed very easily.
4.1.5. Bearing and Lubrication
Rolling bearings are not used in NMM type pumps.
Motor bearing is enough for countervailing all axial and
radial forces.
4.1.6. Seals
In standard production, various mechanical seal types
(e.g. bellow type, spring actuated type) are used for
sealing.
4.2. Construction of Pump Group
4.2.1. Drive
TEFC (Totally Enclosed Fan Cooled) 3 phase, squirrel
caged, in accordance to DIN 42673, IM 1001B3 type
electrical motor which complies with DIN IEC and VDE is
used to drive the pump in proper speed and power.
Specifications of electrical motor;
Isolation class : F
Protection class : IP 54-IP 55
Frequency : 50 Hz
Running type : S1
Start up type : Up to 4 kW, 3x380 V (Y)
More than 4 kW, 3x380V (∆)+(Y/ ∆)
4.2.2. Coupling and Coupling Guard
In NMM type pumps, a clamped type rigid coupling is
used. A coupling guard is provided in accordance with
EN 294 in the rigid coupling area.
Pump can only be run with a guard in
accordance with EN 294 according to safety
instructions.
If there is no cover, it is provided by the operator.
5. TRANSPORT AND STORAGE
Suction, discharge and all auxiliary fittings must be
closed during transport and storage. Dead-end covers
must be removed while the pump unit is being installed.
5.1. Transport
Pump and pump group must be carried safely to the
installation location by lifting equipments.
CAUTION
Current general lifting safety instructions must be
applied. Please use a suspension system shown in
figure while you are carrying and lifting the pump unit.
The suspension rings may be broken because of the
excessive load and may result in a damage of the pump.
Prefer fabric cable for suspension.
Figure 2: Transport of Pump Group
Incorrect lifting may damage the pump unit and cause
injuries.
Damages caused in transport
Check the pump when it is delivered to you. Please let us
know of there is any damage.
5.2. Storage
Please keep the unit clean and dry area during storage.
If the pump is out of use for a long time, please consider
the instructions below.
1. If there is water inside the pump, drain it.
2. Clean the pump casing and impeller by jetting clean
water for a short time.
3. Empty waterinside the pump casing, suction line and
discharge line.
4. Add small amount of antifreeze inside the pump
casing if it is not possible to empty it completely. Rotate
the pump shaft by hand to mix the antifreeze.

NMM Series
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5. Close the suction and discharge exits with gasket
6. Spray an anti-corrosive into the pump casing.
7. Rotate the pump shaft by hand once in every month,
in order to protect it from freezing and to lubricate the
bearings.
6. ASSEMBLY / INSTALLATION
NMM type close coupled pumps are mounted to the
ground by foots of the volute and also fixed to the
ground with a supporting pedestal at the bottom of the
motor.
6.1. Location of Installation
Pump shall be installed in a location where the control
and the maintenance of the pump are easily made. The
pump room shall be suitable for operation of lifting
systems such as freight elevator, forklift, etc.
The pump group should be installed in the lowest
possible location of the pumping system in order to
achieve the highest suction pressure.
6.1.1. Location of Installation- Local Ambient Temperature
When the local ambient room temperature exceeds
+40°C in a pumping system, suitable ventilation should
be provided in order to remove the heat dissipated to
the environment and supply fresh air.
6.2. Fixing (Securing) Of Pump Group
After the alignment of the pump group on the founda-
tion has been made, the mutual securing bolt screws
should be used alternately to fix the pump group.
Figure 3: A typical Concrete Foundation
After the pump has been fixed, mount the
guard. According to the accident prevention
regulations, all preventions and protective
devices related to rotating parts shall be in their
intended place and in operational form.
6.3. Piping
6.3.1. General
• Do not use the pump as the hinged support for the
piping system.
• Put enough supports under the piping system in order
to carry the weight of the pipe and fittings.
• Avoid piping system loads on pump by installing
flexible components (compensator) to suction and
discharge of the pump.
• By mounting flexible supporting items, take into
consideration the fact that these items may elongate
under the pressure.
• Suction pipe shall be in a constantly increasing slope
to the pump. Air in the suction pipe shall be arranged to
move into the pump
• Discharge piping shall be in a constantly increasing
slope to the reservoir ordischarge point, without up and
downs which can cause air pockets in the piping
system. At locations where forming of air pockets is
possible, special items like air valve and air cock are
mounted to evacuate the trapped air.
• It is important that pipe diameter and fittings are at
least as much as the pump opening diameter or
preferable one ortwo size higher. One should never use
fittings with smaller diameters than the pump exit
diameter. In particular, preferred fittings like foot valve,
strainer, filter, check valves and valves shall have large
free passing area, and low friction loss coefficient.
• For piping systems with hot liquids, thermal
expansions are to be taken into account and compensa-
tors shall be mounted in accordance with these
expansions. Caution shall be exercised to avoid the
loading of pump in this installation.
6.3.2. Specification of Work in Piping Installation
In installation of pipes, follow the procedures below
certainly.
• Install the pump on the concrete base as illustrated in
Figure 3.
• Take out the guards (placed by the manufacturer) from
suction and discharge openings of the pump.
• Close the suction and discharge flanges with rubber
gaskets. This precaution is important to avoid the
undesired substances (weld crust, weld slag, sand,
stone, wood piece etc.) get into the pump. Do not take
off this gasket until the installation is completed.

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• Start the installation of piping from the pump side. Do
the necessary assembling and welding of the parts in a
successive order.
• In these operations, do not neglect to put the
necessary supports in their respected locations.
• Following above procedure, complete all piping
system at suction side up to the suction tank (or foot
valve if available), at discharge side up to do discharge
collector and discharge pipe.
• When all installation and welding process is done and
the heat dissipated by welding is removed, dismantle all
the bolted connections from the suction tank to
discharge pipe. Take out all demountable parts.
• Clean these parts and then paint body coat complete-
ly inside and outside.
• Mount the parts again in their intended places.
However, this time start from the discharge line and
move downward to the pump. In this instance, do not
forget to check the flange gaskets. If needed, (for
example deformation during welding) replace them.
• Concerning the connection of the pump flanges to
piping, in case of misalignment of axis and flange holes,
do not force the system to eliminate the misalignment.
Forcing the system may cause difficult-to-correct
problems.
• If there is an axial misalignment between the flanges
of the pump and the pipe, due to the welding or any
other reasons, cut the pipe from a suitable location in
orderto fix the problem. Connect the pipe (pump side) to
the pump. After carrying out the necessary correction,
connect the parts again by welding..
• Dismantle and clean the last welded part. Repaint
again and mount on its place.
• After all these processes are accomplished, remove
the rubber gasket from the suction and discharge
openings. Open their holes and mount them again on
their intended place.
6.3.3. Specification of Work after Installation of Piping
and Piping System
Figure 4: Piping System
An illustrative piping system is shown in Figure 20.
Appropriate manometers shall be mounted on suction
and discharge pipe lines.
Complete the auxiliary pipe connections in piping
system if exist (cooling to bearing housing, and stuffing
box (seal), relief pipe, oil pipe etc.)
6.4. Motor Connection
Motor shall be connected by an electrical technician
according to the connection (switch) diagram. Local
electricity policies regulations have to be applied.
• Electrical connections have to be made by authorized
electricians.
• In dismantling the pump, make sure the electricity is
cut off before taking the motor cover out.
• Use the appropriate electrical connection to the
motor.
6.4.1. Motor Connection Diagram
Motors requiring high moments at start up shall not be
connected star-delta
Frequency controlled motors, require high moment at
start up and have to be cooled properly at low speeds.
Provide the necessary cooling for the motors.
Figure 5: Electric Connection Diagram
Electrical circuit
U (Volt)
3 x 230 V
3 x 400 V
400 V
Delta
230/400 V
Delta
Star
Motor
Suction line (top wiew)
Suction line (bottom wiew)
Installing Pipes
Suction flange
Suction flange

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6.4.2. Motor Protection
• Three phased-motor shall be connected to power
supply.
• Wait the motor to cool down when thermic protected
motor breaks in circuit due to the overheating. Make
sure the motor does not start automatically until it
cools completely
• In order to protect the motor from overcharging and
short circuit use a thermic or thermic-magnetic relay.
Adjust this relay to the nominal current of the motor.
Electrical equipments, terminals and the components
of the control systems may carry electric current
even though they are not operating. They may cause
deadly and serious injuries or irreparable material
damages.
7. COMMISSIONING, START UP AND OPERATING
7.1. Preparations Before Start Up
• Check mechanical seals of pump.
• Make sure that the pump and the suction pipe is
completely filled with water before the starting. If the
pump operates on a positive suction head, no problem
will be encountered. Suction valve is opened and air
drains are un-tightened.
• Pumps with foot valve are filled with water by
opening the pump filling tap or, one takes advantage of
the water accumulated in the discharge pipe and by
using a small valve the check valve is bypassed and the
pump is filled.
• In vacuum pump driven pumps, by operating the
vacuum pump one achieves to fill the pump via increas-
ing the water level in the suction pipe.
CAUTION
Do not start your pump dry (WITHOUT WATER).
7.2. Checking The Direction of Rotation
CAUTION
• The direction of rotation is indicated on the pump
label with an arrow. Apart from special cases, it is
clockwise direction when looking from the motor end.
Observe if the pump is rotating in the expected sense by
starting the motor for a veryshort instant. If it is turning
in the opposite sense, interchange any of two motor
leads.
• If the motor connection is delta, open the discharge
valve slowly.
• If the motor connection is star-delta, set the time
relayto maximum 5 seconds. Monitor the passage from
star to delta by pressing the start button. As soon as
you are assured that the connection is delta, open the
discharge valve slowly. Continue opening the valve
until you read the amperage on the electrical panel
• One should always check the labels which show
the direction of rotation and the direction of fluid flow.
If you dismount the coupling protection to monitor the
direction of rotation, do not restart the engine before
remounting the protection.
As a result of getting in touch with rotating and
stable parts each other temperature increase can
occur. Never check the direction of rotation while the
pump is dry.
7.3. Start up Procedure
• Check if the suction valve is open and the discharge
valve is closed. Start the motor
• Wait until the motor reaches sufficient speed. (In
Star-delta connections, wait until the engine passes to
delta connection.)
• Keeping an eye on the amperage shown on the
panel, open the discharge valve slowly.
• In the primary operation, if the discharge pipe is
empty, do not open the valve completely. By keeping an
eye on the amperage, open the valve with care
regarding that it should not exceed the value indicated
on pump’s label.
• After opening the valve completely, check the
pressure from the pump exit manometer and make sure
that this value is the pump operating pressure value
and is indicated on pump’s label.
• If the value one reads is less than the pump label
value when the valve is completely open, it means that
the height is miscalculated. Increase the value by
narrowing the valve and bring it to pump’s label value.
• If the value one reads is greater than the pump label
value when the valve is completely open, it means that
the height is calculated less than what it should be in
reality. The device is pumping less than what is
requested. Check the installation and the calculations.
• Minimum flow rate: If the pump is working with zero
flow rates (closed valve) from time to time during its
operation, the water inside the pump may endanger the
pump by getting warmed up. In such cases, a minimum
flow valve must be connected to the pump exit.
CAUTION
Stop the motor if the pump gets too hot. Wait until it
gets cold. Then start the system up again carefully.

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7.4. Shut Down Procedure
CAUTION
During sudden start ups and stops, a pressure reducing
valve must be placed at the exit section of high flow rate
pumps whose discharge pipelines are long, in order to
reduce water hammer effect. Water hammer may
explode the pump.
In normal conditions (apart from sudden power shut
down, etc), stop the pump as below:
• Close the discharge valve slowly
• Switch the power off, stop the motor. Notice that the
rotor slows down.
• Do not start up the motor at least before 1 to 2 minutes.
• If the pump will be out of use for a long time, close the
suction valve and auxiliary circuits. If the pump is
outside and if there exists a danger of frost, remove all
drain taps and empty all the water inside the pump. (5.2.
Storage).
CAUTION
If the pump is outside and if there exists a danger of
frost, remove all drain taps and empty all the water
inside the pump.
8. MAINTENANCE
CAUTION
Maintenance operations must be done by authorized
personnel with protective clothing only. The personnel
must also beware of high temperatures and harmful
and/or caustic liquids. Make sure that the personnel
read carefully the manual.
• The instructions in Safety Precautions must be
executed during maintenance and repair
• Continuous monitoring and maintenance will increase
the engine’s and pump’ s lives.
The instructions below should be applied.
8.1. The Checks During the Operation
• Pump must never be operated without water.
• Pump must not be operated for a long time with the
discharge valve closed (zero capacity).
• Precautions must be taken against flare up when the
component temperatures are over 60°C. “Hot Surface”
warnings must be placed over necessary areas.
• All the auxiliary systems must be in use while the
pump is operating.
• If the pump has mechanical sealing, there is no need
for excessive maintenance. Water leakage from the
mechanical sealing indicates the fact that the sealing is
worn out and therefore needs to be replaced.
• If the system consists of a substitute pump, keep it
ready by operating it once a week. Check also the
auxiliary systems of the substitute pump.
The air of the pump and suction line must be drained
before commissioning of the pump. The interior of the
pump contacting with pumped liquid including gasket
way and auxiliary systems must be filled with pumped
liquid.
• Ensure that delivery pressure is enough.
• Do not operate the pump at values above pressure,
temperature or motor speed values specified by
manufacturer, never use improper liquids with the
pump.
8.1.1. Component Check
CAUTION
To make possible the visual control, one must be able
to reach the pump from any direction. Especially, to be
able to dismount the internal units of the pump and the
engine, sufficient free space must be created around
them for maintenance and repair. Furthermore, one
must make sure that the piping system can easily be
dismounted.
8.1.2. Bearing and Lubrication
Rolling bearings are not used in NMM type pumps.
Motor bearing is enough for countervailing all axial and
radial forces. Motor bearings are provided with lifelong
heat resistant grease.
8.1.3. Mechanical Seals
Mechanical seals are used at NMM type pumps.
Mechanical seals are absolutely leak tight and needs
less maintenance than soft packing.
Mechanical seal;
1. Provides leak proof operation in heavy operating
conditions (in waste water pumps, chemical process
and refinery pumps).
2. Easily mountable and needs less maintenance.
3. Does not cause wearing on the shaft
4. Sealing operation does not depend on the quality
of shaft finishing.
8.1.4. Drive
Apply to the operating instructions of the motor
manufacturer.
8.1.5. Auxiliary Components
Check regularly the fittings and the gaskets, replace
the worn out pieces.

NMM Series
11
8.2. Service
Our Customer Service Department offers after-sale
service. Manager should employ authorized and trained
personnel for mounting/dismounting procedures.
Before these procedures, one must make sure that
pump interior is clean and empty.
This criterion is also valid for the pumps which are sent
to our factory or to our service points.
Maintain the safety of the personnel and the environ-
ment in every field procedure.
8.3. Spare Parts
The spare parts of NM type pumps are guaranteed for
10 YEARS by MAS DAF MAKINA SANAYI A.Ş.
In your spare parts requests, please indicate the below
listed values that are indicated on your pump’s label.
Pump type and size:
Motor power and speed:
Pump serial number:
Capacity and head:
If you wish to keep spare parts in store, depending on
the number of same type of pumps, for two operation
years, the quantities which are listed in the table below
are recommended.
Table 1: Spare Part List
9. NOISE LEVEL AND VIBRATION
The reasons which increase the noise level are
indicated below:
• Touch of coupling halves due to worn rubber sleeves
(incorrectly aligned)
• Noise level increases due to the fact that the pump is
not founded properly (Vibration)
• If the installation does not have compensator noise
and vibration increases.
• Wearing in ball bearing also increases noise level.
Check if there is any noise increasing elements in
your installation.
9.1. Expected Noıse Values
Measurement conditions:
• The distance between the measure
point and the pump : 1m
• Operation : Without Cavitation
• Motor : IEC Standard Motor
• Tolerance : ±3 dB
Table 2: Sound Pressure Level
(*) Without protective sound hood, measured at a
distance of 1 m directly above the driven pump, in a free
space above a sound reflecting surface.
The above values are maximum values. The surface
noise pressure level at dB(A) unit is shown as (LpA). This
complies withTS EN ISO 20361.
10. DISASSEMBLY, REPAIR AND REASSEMBLY
Before starting work on the pump set, make sure it is
disconnected from the mains and can not be switched
on accidentally.
Fallow the safety precautions outlined in “Safety
instructions”.
Component Name
The Number of Equivalent Pumps
in the Installation
Shaft (Wedge included) (quantity)
İmpeller (quantity)
Mechanical Seal
Wear Ring
1-2 3 4 5
1 1 2 2
1 1 1 2
1 2 2 3
1 1 1 2
6-7
2
2
3
2
8-9
3
3
4
3
10+
%30
%30
%50
%50
Sound Pressure Level [dB] *
Pumpwith Motor
1450 rpm/min 2900 rpm/min
Power of
Motor
PN [kW]
0,25
0,37
0,55
0,75
1,1
1,5
2,2
3,0
4,0
5,5
7,5
11,0
15,0
18,5
22,0
30,0
37,0
53,0
54,0
55,0
56,0
57,0
58,0
59,0
60,0
61,0
62,0
64,0
65,0
67,0
68,0
69,0
70,0
71,0
-
-
-
66,0
66,0
67,0
67,0
68,0
68,0
70,0
71,0
73,0
74,0
75,0
76,0
77,0
78,0

KYP Serisi
12
10.1. Disassembly
• Close all valves in the suction and discharge lines,
drain the pump.
• Remove guard.
• Thanks to “Back Pull Out Design”; the impeller, shaft
and other rotating parts being removable no need to
disconnect the suction and delivery pipes.
• If to take out the complete pump is necessary,
disconnect pump from the driver, suction and discharge
pipes and detach the base plate.
• Dismantle the rotor groupwith motor from the
volute casing (Be careful to keep the stuffing box cover
in place to avoid any mechanical seal trouble).
• Unscrew the impeller end nut (65) and take out the
impeller (20) and impeller key (210). Use rust remover
solvent during dismountling if necessary.
• Take out the set screws on the pump shaft. Take off
the motor by unscrew the hex bolts (320)
• Pull out the rotating part of the mechanical seal
(250).
• Take out the shaft.
10.2. Reassembly
• Reassembly proceeds in reverse sequence to
disassembly as described in section 10.1. You may find
the attached drawings useful.
• Coat the seats and screw connections with graphite,
silicon or similar slippery substance before reassembly.
If you can not find any of the above you may use oil
instead (except the pumps for drinking water).
• Never use the old gaskets, make sure the new
gaskets and o-rings are the same size as the old ones.
• Slip the pump shaft (60) onto the motor shaft, fix the
set screws.
• Place the stationary part of mechanical seal to its
place on the adaptor (12)
• Mountthe adaptor to the motor flange.
• Place the impeller key (210) into keyway, slide the
impeller (20) onto the shaft (61) and screw the impeller
nuts (65).
• Now reassembly of the rotor group is complated.
• Finally mount rotor assembly to the volute casing. (In
the repair shop or on site.)
• Make sure the gaskets and o-rings are evenly placed
without sliding and not damaged or not squezed at all.
• Place the pump on the baseplate, couple the motor.
Connect suction and discharge pipes as wellas auxiliary
pipes. Take the unit into operation as it was indicated in
section 7.
• Put the stationary part of mechanical seal in its place
on the seal cover (58-59). Then put this part on the
shaft. Afterwards put the rotating part of mechanical
seal on its position.
• Mount stuffing box (03) to bearing housing (30).
• At this stage you can insert the irrigation ring.
• Replace impeller key and pump impellers. Tighten
the impeller nuts.
• Replace the coupling and coupling key.
• Tighten mechanical seal cover.
• Now reassembly of the rotor group is completed.
• Finally mount rotor assembly to the volute casing. (In
the repair shop or on site.)

NMM Series
13
11. POSSIBLE FAILURES, CAUSES, SOLUTIONS
Possible failures and solution strategies are listed in the table below. Please apply to the Customers’ Service Depart-
ment of our company when a generic solution is not found to your problem.
While the failures are repaired the pump must always be dry and un-pressurized.
Table 3: Possible Failures, Causes, Solutions
POSSIBLE FAILURE CAUSES SOLUTIONS
The pump delivers insufficient
capacity
• Discharge head too high
• Very high counter pressure
• Pump and/or pipe cannot discharge air, cannot suck
• Occurrence of air pockets inside the pipe
• NPSH is too low
• System pressure is lower than the requested pressure level
• Speed too high
• Liquid pumped of different specific gravity and viscosity than
that for which pump is rated
• Engine works at two phases
• System pressure is higher than the requested pressure level
• Too much, too little or improper lubrication
• Increase in axial forcing
• Worn out gland
• Worn out motor or pump ball bearings
• Cavitation
• Operation in the far left or right of the performance curve
• Pump and/or pipe can neither discharge, nor aspirate air
• Too low capacity
• Pump and/or pipe can neither discharge, nor aspirate air
• NPSH is too low
• Internal components of the pump are worn out
• System pressure is lower than the requested pressure level
• Too much, too little or improper lubrication
• Rotor unbalanced
• Improper bearings
• Use brand new gland
• Change the stuffing bush
• Replace
• Close the delivery partially in order to reduce
the capacity.
• Operate the pump at its label setting
• Bleed completely the pump and the pipe
• Open more the valve
• Bleed completely the pump and the pipe
• Increase the liquid level
• Replace the worn out components
• Adjust the operating pressure to the label value
• In case of continuous overload, decrease the
impeller diameter
• Change the oil, decrease or increase its quantity
• Balance the impeller again
• Use new bearings
• Set the operating pressure to the label value.
• Change the oil, decrease or increase its quantity
• Clean the balance holes on the impeller disc
• Readjust the operating point
• See if there is any undesired material inside
the pipe
• Vent completely the pump and the pipe
• Change the piping configuration
• Increase the liquid level
• Adjust the operating pressure to the label value
• Decrease the speed
• Increase the engine power
• Replace the fuse and control the electrical
connections
Motor overload
Pump head is too high
Bearing temperatures are high
Excessive leakage from the
stuffing box
Noisy operation
Excessive increase in pump
temperature
Vibration

14
Figure 6: NMM Pump Dimensions Figure
12. PUMP DIMENSIONS TABLE
2h
n2
n1
H
a
m1
m2
sND
DNd
f
1h
Lm
MOTOR FLANGESGENEL PUMPMechanical
Seal
KW IEC Lm DNdDNsLafh1 h2 n1n2m1m2sNominal Impeller
Diameter
mm mm mm mm mm mm mm mm mm mm mm mm mm
32-160
1450 rpm
0.25 71 222.5
32 50
461.5
80
159
132 160 240 190 100 70 12 20
0.37 71 222.5 461.5 159
0.55 80 243.5 482.5 159
0.75 80 243.5 482.5 159
2900 rpm
1.5 90L 266.5
32 50
506.5
80
160
132 160 240 190 100 70 12 20
2.2 90L 266.5 506.5 160
3 100L 292 552 180
4 112M 335.5 595.5 180
5.5 132S 360.5 640.5 200 30
32-200
1450 rpm
0.37 71 222.5
32 50
462.5
80
160
160 180 240 190 100 70 12 20
0.55 80 243.5 483.5 160
0.75 80 243.5 483.5 160
1.1 90L 266.5 506.5 160
1.5 90L 266.5 506.5 160
2900 rpm
4 112M 335.5
32 50
595.5
80
180
160 180 240 1 90 100 70 12
20
5.5 132S 360.5 645.5 205
30
7.5 132M 395.5 680.5 205
11 160M 666 976 230

NMM Series
15
MOTOR FLANGESGENEL PUMPMechanical
Seal
KW IEC Lm DNdDNsLafh1 h2 n1n2m1m2sNominal Impeller
Diameter
mm mm mm mm mm mm mm mm mm mm mm mm mm
32-250
1450 rpm
0.55 80 243.5
32 50
513.5
100
170
180 225 320 250 125 95 12 20
0.75 80 243.5 513.5 170
1.1 90L 266.5 536.5 170
1.5 90L 266.5 536.5 170
2.2 100L 292 582 190
2900 rpm
5.5 132S 360.5
32 50
675.5
100
215
180 225 320 250 125 95 12 30
7.5 132M 395.5 710.5 215
11 160M 666 1006 240
15 160L 666 1006 240
18.5 160L 666 1006 240
40-160
1450 rpm
0.25 71 222.5
40 65
462.5
80
160
132 160 240 190 100 70 12 20
0.37 71 222.5 462.5 160
0.55 80 243.5 483.5 160
0.75 80 243.5 483.5 160
2900 rpm
3 100L 292
40 65
552
80
180
132 160 240 190 100 70 12
20
4 112M 335.5 595.5 180
5.5 132S 360.5 640.5 200 30
7.5 132M 395.5 675.5 200
40-200
1450 rpm
0.55
80
243.5
40 65
503.5
100
160
16018026521210070 12 20
0.75
80
243.5
503.5
160
1.1
90L
266.5
526.5
160
1.5
90L
266.5
526.5
160
2900 rpm
5.5
132S
360.5
40 65
665.5
100
205
16018026521210070 12 30
7.5
132M
395.5
700.5
205
11
160M
666
996
230
15
160L
666
996
230
40-250
1450 rpm
1.5 90L 266.5
40 65
526.5
100
160
18022532025012595 12 202.2 100L 292 572 180
3 100L 292 572 180
2900 rpm
7.5
132M
395.5
40 65
725.5
100
230
18022532025012595 12 30
11
160M
666
996
230
15
160L
666
996
230
18.5
160L
666
996
230
22
180M
519
849
230
30 200L 555 885 230

16
MOTOR FLANGESGENEL PUMPMechanical
Seal
KW IEC Lm DNdDNsLafh1 h2 n1n2m1m2sNominal Impeller
Diameter
mm mm mm mm mm mm mm mm mm mm mm mm mm
50-160
1450 rpm
0.75 80 243.5
50 65
503.5
100
160
16018026521210070 12 20
1.1
90L
266.5
526.5
160
1.5
90L
266.5
526.5
160
2900 rpm
4
112M
335.5
50 65
615.5
100
180
16018026521210070 12
20
5.5
132S
360.5
660.5
200
30
7.5
132M
395.5
695.5
200
11 160M 666 966 200
50-200
1450 rpm
1.1
90L
266.5
50 65
526.5
100
160
160 200 265 212 100 70 12 20
1.5
90L
266.5
526.5
160
2.2
100L
292
572
180
2900 rpm
7.5
132M
395.5
50 65
700.5
100
205
160 200 265 212 100 70 12 30
11
160M
666
996
230
15
160L
666
996
230
18.5
160L
666
996
230
50-250
1450 rpm
2.2
100L
292
50 65
572
100
180
180 225 320 250 125 95 12 20
3
100L
292
572
180
4
112M
335.5
615.5
180
5.5
132M
395.5
700.5
205
30
2900 rpm
15 160L
666
50 65
996
100
230
180 225 320 250 125 95 12
30
18.5 160L 666 996 230
22
180M
519
849
230
30
200L
555
885
230
35
37
200L
555
885
230
45 225M 625 955 230
50-315
1450 rpm
4
112M
335.5
50 80
625.5
100
190
22528036028016012012 30
5.5
132M
395.5
710.5
215
7.5
132M
395.5
710.5
215
11
160M
666
1006
240
15 160L 666 1006 240
65-160
1450 rpm
0.75
80
243.5
65 80
503.5
100
160
16020028021212595 12 20
1.1
90L
266.5
526.5
160
1.5
90L
266.5
526.5
160
2.2
100L
292
572
180
2900 rpm
5.5 132M
395.5
65 80
695.5
100
200
16020028021212595 12 30
7.5 132M 395.5 695.5 200
11
160M
666
996
230
15
160L
666
996
230
18.5 160L666 996 230

KYP Serisi
17
NMM Series
MOTOR FLANGESGENEL PUMPMechanical
Seal
KW IEC Lm DNdDNsLafh1 h2 n1n2m1m2sNominal Impeller
Diameter
mm mm mm mm mm mm mm mm mm mm mm mm mm
65-200
1450 rpm
2.2 100L292
65 80
572
100
180
18022532025012595 12 203 100L292 572 180
4
112M
335.5
615.5
180
2900 rpm
18.5
160L
666
65 80
996
100
230
18022532025012595 12
30
22
180M
519
849
230
30
200L
555
915
260
35
37 200L555 915 260
65-250
1450 rpm
3
100L
292
65 80
582
100
190
20025036028016012016
20
4
112M
335.5
625.5
190
5.5
132M
395.5
710.5
215
30
7.5
132M
395.5
710 .5
215
2900 rpm
22
180M
519
65 80
859
100
240
20025036028016012016
30
30
200L
555
925
270
35
37
200L
555
925
270
45
225M
625
995
270
65-315
1450 rpm
5.5
132M
395.5
65 80
735.5
125
215
224 280 400 315 160 120 16 30
7.5
132M
395.5
735.5
215
11 160M 666 1031 240
15
160L
666
1031
240
65-400
1450 rpm
11
160M
666
65 100
1031
125
240
25035540031516012016 30
15
160L
666
1031
240
18.5 180M519884 240
22 180L519884 240
30 200L 555 950 270 35
80-160
1450 rpm
1.1 90L 266.5
80 100
551.5
125
160
18022532025012595 12 20
1.5 90L 266.5 551.5 160
2.2 100L292 597 180
3 100L292 597 180
2900 rpm
7.5 132M395.5
80 100
720.5
125
200
18022532025012595 12 30
11
160M
666
1021
230
15
160L
666
1021
230
18.5
160L
666
1021
230
22 180M 519 874 230

KYP Serisi
18
80-200
1450 rpm
2.2
100L
292
80 100
607
125
190
18025034528012595 12 30
3
100L
292
607
190
4
112M
335.5
650.5
190
5.5
132M
395.5
735.5
215
7.5
132M
395.5
735.5
215
2900 rpm
22
180M
519
80 10 0
884
125
240
18025034528012595 12
30
30
200L
555
950
270
35
37
200L
555
950
270
45
225M
625
1020
270
MOTOR FLANGESGENEL PUMPMechanical
Seal
KW IEC Lm DNdDNsLafh1 h2 n1n2m1m2sNominal Impeller
Diameter
mm mm mm mm mm mm mm mm mm mm mm mm mm
80-250
1450 rpm
5.5 132M395.5
80 100
735.5
125
215
20028040031516012016 30
7.5 132M395.5 735.5 215
11 160M6661031240
15 160L 666 1031 240
80-315
1450 rpm
11 160M 666
80 100
1031
125
240
250 315 400 315 160 120 16 30
15 160L 666 1031 240
18.5 180M 519 884 240
22 180L 519 884 240
80-400
1450 rpm
18.5
180M 519
80 100
894
125
250
280 355 500 400 200 150 20 45
22 180L 519 894 250
30 200L 555 960 280
37 225M 625 1030 280
45 225M 625 1030 280
100-160
1450 rpm
1.1 90L 266.5
100 125
551.5
125
160
200 280 360 280 160 120 16 20
1.5 90L 266.5 551.5 160
2.2 100L 292 597 180
3 100L 292 597 180
4 112M 335.5 640.5 180
2900 rpm
11 160M
666
100 125
1021
125
230
200 280 360 280 160 120 16
30
15
160L
666
1021
230
22
180M
519
874
230
30
200L
555
940
260
35
37 200L 555 940 260
100-200
1450 rpm
3
100L
292
100 125
607
125
190
200 280 360 280 160 120 16 30
4
112M
335.5
650.5
190
5.5 132M 395.5 760.5 240
7.5 132M 395.5 760.5 240
2900 rpm
22 180M 519
100 125
884
125
240
200 280 360 280 160 120 16 35
30 200L 555 950 270
37 200L 555 950 270
45
225M
625
1020
270

19
NMM Series
MOTOR FLANGESGENEL PUMPMechanical
Seal
KW IEC Lm DNdDNsLafh1 h2 n1n2m1m2sNominal Impeller
Diameter
mm mm mm mm mm mm mm mm mm mm mm mm mm
100-250
1450 rpm
5.5
132M
395.5
100125
735.5
125
215
225280 40031516012016 30
7.5
132M
395.5
735.5
215
11
160M
666
1031
240
15 160L 666 1031 240
18.5 180M 519 884 240
100-315
1450 rpm
15 160L 666
100125
1046
140
240
25031540031516012016
30
18.5 180M 519 899 240
22 180L 519 899 240
30 200L 555 965 27035
37 225M 625 1035 270
100-400
1450 rpm
22 180L 519
100125
909
140
250
28035550040020015020 45
30
200L
555
975
280
37
225M
625
1095
330
45
225M
625
1095
330
55 250M 746 1216 330
125-200
1450 rpm
5.5
132M
395.5
125 150
750.5
140
215
25031540031516012016 30
7.5
132M
395.5
750.5
215
11 160M 666 1046 240
15 160L 666 1046240
125-250
1450 rpm
11
160M
666
125 150
1056
140
250
25035540031516012016 30
15
160L
666
1056
250
18.5
180M
519
909
250
22
180L
519
909
250
30 200L 555 975 28035
125-315
1450 rpm
18.5
180M
519
125 150
914
140
255
280355 50040020015020 35
22
180L
519
914
255
30
200L
555
980
285
37 225M 625 1080315
125-400
1450 rpm
37
225M
625
125 150
1095
140
330
31540050040020015020 45
45
225M
625
1095
330
55
250M
746
1216
330
75
280S
767
1237
330
90 280M 818 1288330
Table 4: NMM Pump Dimensions Table

KYP Serisi
20
Table 5: Tightening Torques Table
THREAD DIAMETER
TIGHTENING TORQUEMAX (Nm)
Property Classes
8.8 10.9
M4 3.0 4.4
M5 5.9 8.7
M6 10 15
M8 25 36
M10 49 72
M12 85 125
M14 135 200
M16 210 310
M18 300 430
M20 425 610
M22 580 820
M24 730 1050
M27 1100 1550
M30 1450 2100
M33 1970 2770
M36 2530 3560
13. TIGHTENING TORQUES
14. FORCES AND MOMENTS AT THE PUMP FLANGES
All of the applied load sif not reached the maximum allowable value, to provide that the following additional
conditions, one of these loads may exceed the normal limit:
•Any component of a force or a moment, must be limited1.4times of the maximum allowable value,
•The actual force sand moments acting on each flange, should provide the following formula:
In here, and arearithmetic sum of the loads for each flange
at the pump level, without regard of the algebraic signs of the
actual and maximum allowable values.
F
M