M Pumps CN SEAL-MV Series User manual

Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX
Setting Innovative
Standards
M PUMPS PROCESS SRL
Via dell’artigianato, 120
45015 Corbola (RO) –Italia
Tel. [phone] Fax + 39 0426 349126 1
[e-mail]
MECHANICAL SEAL PUMPS
Centrifugal, Vertical, Inline
According to API610 –11th edition
CN SEAL-MV series
User Manual
This copy of the manual is a translation of the italian version
and both manuals must be always furnished together
MODEL: Bare Frame pump with motor
CAUTION
These instructions are intended for operators:
- Pump installation by qualified personnel;
- Use the pump, by staff
- Carry out maintenance / repair of the pump.
Read this instruction manual before using the pump.

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Present instruction is valid for the pumps that have been supplied with, this is not for the total installation.
Instruction and maintenance for the installation must be obtained from plant manufacturer, that designed the
installation. In any case installation manual will take precedence over the pump manual.
THIS INSTRUCTION MANUAL is intended to guide those responsible for the installation, operation and
maintenance of M PUMPS PROCESS CN SEAL-MV series pumps. Please read it carefully, before you install
and operate your M PUMPS PROCESS pump.
Additional useful information can also be obtained contacting directly M PUMPS PROCESS or from: - Hydraulic
Institute Standards (USA) regarding pump installation.

Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX
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Index
1. GENERAL WARNINGS AND SAFETY..............................................................................................................................5
2. SYMBOLS USED IN THE MANUAL..................................................................................................................................5
3. WARRANTY...................................................................................................................................................................6
4. NAMEPLATE .................................................................................................................................................................7
5. PUMP DESCRIPTION ...................................................................................................................................................10
5.1. Applications................................................................................................................................................................... 10
5.2. Technical Data............................................................................................................................................................... 10
6. ALLOWABLE NOZZLES LOADING................................................................................................................................ 11
7. OPERATING LIMITS AND PERFORMANCES CN SEAL-MV SERIES..............................................................................13
8. OUTLINE DRAWINGS...................................................................................................................................................14
9. NOISE AND VIBRATION ...............................................................................................................................................14
10. CHECKS TO PUMP DELIVERY, STORAGE ....................................................................................................................14
11. SHIPPING AND HANDLING...........................................................................................................................................14
12. LIFTING.......................................................................................................................................................................14
14. ASSEMBLY, INSTALLATION, CONNECTIONS, COMMISSIONING AND SETTING............................................................. 15
14.1. Assembly ....................................................................................................................................................................... 15
14.2. Connection of the pump to suction and discharge pipes.................................................................................................... 15
14.3. Connection of the pump to suction and discharge pipes ................................................................................................... 15
14.4. Lubrication..................................................................................................................................................................... 16
14.5. Checks for the proper operation...................................................................................................................................... 20
14.6 Commissioning and operator training .............................................................................................................................. 20
14.7. Coupling of the pump to the motor .................................................................................................................................. 21
14.8. Features and installation of pump and motor assembly..................................................................................................... 22
14.9ALIGNMENT OF THE COUPLING...................................................................................................................................... 22
14.10. Alignment tolerances and coupling .................................................................................................................................. 22
14.11. Alignment of Hot pumps ................................................................................................................................................. 22
15. INTENDED USE OF THE PUMP. IMPROPER USE. DESCRIPTION OF FUNCTIONING.PERSONAL PROTECTIVE
EQUIPMENT DURING USE. ................................................................................................................................................23
15.1. Intended use of the pump .............................................................................................................................................. 23
15.2. Instructions for proper use reasonably foreseeable........................................................................................................... 23
15.3. Not permitted use .......................................................................................................................................................... 23
16. RESIDUAL RISKS AND PROTECTION MEASURES TO BE TAKEN .................................................................................24
16.1. Description of the residual risks that remain..................................................................................................................... 24
16.2. Protection measures to be taken by the user and instructions ........................................................................................... 24
16.3. Personal protective equipment to wear ............................................................................................................................ 25
17. OPERATIONAL LIMITS, DESCRIPTION OF HAZARDS NOT EXCLUDED FROM THE SECURITY MEASURES TAKEN .....25
17.1. Safety information present on the pump.......................................................................................................................... 25
18. INSTRUCTIONS AND PROCEDURES FOR THE TRAINING OF THE PERSONEL AND FOR EMERGENCIES ....................26
18.1. Recovery mode .............................................................................................................................................................. 26
18.2. Fire-fighting equipment to be used:................................................................................................................................. 26
18.3. Emission / dispersion of harmful substances .................................................................................................................... 27
19. MALFUNCTIONING, FAILURE, BREAKDOWN, ACCIDENT. MOST FREQUENT PROBLEMS: CAUSES AND REMEDIES...27
19.1. Malfunctioning and Failure .............................................................................................................................................. 27
19.2. Breakdown .................................................................................................................................................................... 27
19.3. Accident ........................................................................................................................................................................ 27
19.4. Most frequent drawbacks: problems, causes, remedies, residual risks................................................................................ 27
20. PERIODIC AND EXTRAORDINARY MAINTENANCE.....................................................................................................31
20.1. Cleaning components ..................................................................................................................................................... 31
20.2. Periodic preventive maintenance ..................................................................................................................................... 31
20.2.1. Emptying of the fluid contained in the pump....................................................................................................................32
20.2.2. Draining the oil contained in the pump ............................................................................................................................32
20.3. Extraordinary maintenance ............................................................................................................................................. 32
21. REPAIR AND PARTS REPLACEMENT .........................................................................................................................32
22. The periodic maintenance specified in the“ PERIODIC AND EXTRAORDINARY MAINTENANCE” ..............................33
22.1. Pump disassembling....................................................................................................................................................... 33
22.1.1. Pull Out Element Removal ..............................................................................................................................................34
22.1.2. Pull Out Element Disassembly.........................................................................................................................................35
23. EXAMINATION OF PARTS...........................................................................................................................................37
23.1. Cleaning Agents ............................................................................................................................................................. 37
23.1.1. Casing, seal housing and impeller ...................................................................................................................................37
23.1.2. Mechanical seal..............................................................................................................................................................37
23.1.3. Throat Bush (If fitted) ....................................................................................................................................................38
23.1.4. Shaft.............................................................................................................................................................................38

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23.1.5. Gaskets and O-rings.......................................................................................................................................................38
23.1.6. Bearings........................................................................................................................................................................38
23.1.7. Labyrinths or bearing isolators (if fitted) ..........................................................................................................................39
23.2. Pump reassembling ........................................................................................................................................................ 39
24. DECOMMISSIONING, DISMANTLING AND DISPOSAL OF MATERIALS......................................................................39
24.1. Decommissioning ........................................................................................................................................................... 39
24.2. Demolition and dismantling............................................................................................................................................. 39
25. EXPLODED VIEW PART LIST .....................................................................................................................................40
26. NOTES ........................................................................................................................................................................44
27. APPENDIX A –Register of maintenance and periodic checks of the pump................................................................45
28. APPENDIX B –Startup check list................................................................................................................................46

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1. GENERAL WARNINGS AND SAFETY
This manual was prepared by M PUMPS PROCESS pump to provide the buyer all necessary information for its
proper use and regular maintenance. In this manual is also contained the manual of the electric motor when the
pump is supplied with this.
For safety and hygiene of the workplace and to ensure a fair and sustainable use of the pump, the manual should
be kept for any consultation.
As part of the pump, this manual must go with it.
For any given non-deductible or not included in this manual is recommended that you contact M PUMPS
PROCESS.
Do not use the pump before you have read and understood all safety rules and instructions in this
manual.
In case of damage or loss of the manual, ask for a copy to M PUMPS PROCESS promptly.
The failure to follow instructions in this manual, exempt M PUMPS PROCESS from any liability.
The pump and the instructions are intended for operators who make professional use and should be used by
qualified personnel adequately trained, aware of uses, operation and risk that the pump generates during its use,
the user with experience is the best form of qualification.
M PUMPS PROCESS reserves at any time the right to make changes deemed necessary to improve the pump,
taking care to update this manual as soon as possible. This reflects the state of the art at the marketing pump. In
case of transfer of the pump, the user is encouraged to report to M PUMPS PROCESS the address of the new
owner to facilitate the transmission of any additions to the manual to the new user.
M PUMPS PROCESS reserves all rights to this manual, no total or partial reproduction is allowed without written
consent.
2. SYMBOLS USED IN THE MANUAL
In the text to indicate the risk of maneuvers or possible dangerous situations, warnings have been included, each
of which consists of a symbol followed by a warning.
ELECTRICAL
SAFETY
This symbol indicates electrical safety instructions where non-compliance will involve a
high risk to personal safety or the loss of life.
LOSSES
HAZARD
This symbol indicates safety instructions to follows during pump installation and
commissioning where non-compliance will involve a high risk to personal safety or the
loss of life.
HANDS
HAZARD
This symbol is used in safety instructions to remind to don’t remove protections when
pump is running. It is used in safety instructions where non-compliance in the hazardous

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area would cause the risk of an explosion
ATEX
This symbol indicates explosive atmosphere zone marking according to ATEX 94/9/CE. It
is used in safety instructions where non-compliance would cause the risk of an explosion
in the hazardous area.
DANGER
Indicates a potential risk to operators who are using the pump and / or the integrity of the
pump, which could result in damaging itself and / or serious injury to people concerned.
CAUTION
Calls attention to important details that the staff must know and keep in mind for the
proper use and operation of the pump.
PROHIBITION
Calls attention to transactions that are absolutely prohibited, not respecting the prohibition
you may damage the pump and / or operators.
M PUMPS PROCESS declines responsibility for damages to things or people for not
having complied with the prohibitions set
3. WARRANTY
Valid for one year from the date of the pump sale. M PUMPS PROCESS do not assume any liability for any
warranties explicit or implied, nor as regards the possibility to sell or the suitability of the items supplied.
The warranty will not be applied if:
the repair and / or maintenance was not carried out strictly in accordance with the instructions;
the pump has not been installed and put into service as instructed, we strongly recommend to refer to
APPENDIX B of the present manual for startup;
the repairs were not made by staff M PUMPS PROCESS or were made without consulting M PUMPS
PROCESS;
spare parts are not original were used;
lubricants were used different from those recommended;
the parts supplied were not used according to their nature and / or destination;
the parts supplied were used carelessly, negligently, improperly;
the parts supplied were damaged due to external circumstances.
All wear parts are excluded from warranty.

Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX
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4. NAMEPLATE
The pump for installation in ordinary environments has the nameplate on the side of the support as shown: only
the fields are compiled must be considered relevant and therefore valid for identification.
-PUMP SUPPLIED WITH ELECTRIC MOTOR:

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Pump serial number(s.nr) defines the type of components installed in the pump:

Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX
Pag. 9/49

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5. PUMP DESCRIPTION
CN SEAL-MV pump series is designed to meets the rigorous requirements of ISO 13709/API 610, eleven edition.
A wide range of pump configurations and hydraulic coverage available.
Vertical design ensure space-saving and suitability for cryogenic, high temperature and high working pressure
services. ISO 21049/API 682 Seal Chamber accommodates a wide variety of seal configurations for the most
severe services. A complement of ISO 13709/API 610 seal flush plans is available.
Cartridge Seal Mounting assures ease of maintenance and precise seal face setting for maximum seal life
Back Pull-Out of rotating assembly for OH3 models simplifies maintenance as neither the motor nor piping
connections are disturbed.
Motor Support Head is a heavy-duty design with a registered fit motor mount. Generous size open compartments
allow easy access to all bolting and removal of the complete pumping assembly, including mechanical seal,
without removal of casing.
Dynamically Balanced Impeller limits vibration and assures smooth operation over wide flow range.
Renewable Wear Rings for both the casing and impeller reduce replacement cost secured by axial screws, with
option for tack welding, back wear ring standard and rear rings and balance holes eliminated for high suction
pressure applications.
Stiff Shaft Design limits maximum deflection at seal faces to 0.05 mm(0.002 in) maximum for a long life of the
pump.
5.1. Applications
Generally this model is ideal for clean liquids slightly contaminated, without particles that can be magnetized;
The maximum working pressure of the plant, the allowable temperature and the maximum rotation speed
depends on the type of pump and it is specified in the "TECHNICAL DATA" paragraph.
Other uses are not allowed as the conditions of use stated in the “TECHNICAL DATA” paragraph must be
respected in full. Using the pump in a plant or in liquid conditions different from those for which the pump was
designed, can lead to dangerous situations to the user.
5.2. Technical Data
The pump described in this manual has the following characteristics:
CN SEAL-MV
Nozzle: ANSI B 16.5 - 300lbs or DIN PN 40 flanged, other on request;
Max viscosity: 200 cps (standard);
Max system pressure: 40 bar (standard, CN SEAL-MV); higher pressure rating available, please refer
to pump datasheet;
Flow up to 1800 mc/h;
Head up to 155 m;
Working temperature up to +350 °C;
Installed motor power: from 1,5 kW to 500 kW;
Speed: up to 3500 rpm (up to 6x4x13, superior sizes up to 1750 giri/min );
Weight (pump only): from 55 to 1800 kg;
Electric Motor characteristics:
Supply frequency: 50 Hz
Supply frequency: 60 Hz
2 poles
2900 rpm
3500 rpm
4 poles
1450 rpm
1750 rpm
6 poles
980 rpm
1150 rpm
CAUTION
CAUTION: If the pump is driven by inverter, remain within the recommended limits
of rotation

Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX
Pag. 11/49
6. ALLOWABLE NOZZLES LOADING
Following table shows nozzles loading of CN SEAL-MV pump series in standard execution. For Special
construction please refer to GA drawing sent.
PUMP
SIZE
Fx; N
Fy; N
Fz; N
Fr; N
Mx; Nm
My; Nm
Mz; Nm
Mr; Nm
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
2x1½x5
1420
1420
1780
1780
1160
1160
2560
2560
920
920
460
460
700
700
1240
1240
2x1½x6
1420
1420
1780
1780
1160
1160
2560
2560
920
920
460
460
700
700
1240
1240
2x1½x8
1420
1420
1780
1780
1160
1160
2560
2560
920
920
460
460
700
700
1240
1240
2x1½x10
1420
1420
1780
1780
1160
1160
2560
2560
920
920
460
460
700
700
1240
1240
3x1½x5
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x1½x6
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x1½x8
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x1½x10
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x1½x13
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x2x5
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x2x6
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x2x8
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x2x10
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
3x2x13
2140
1420
2660
1780
1780
1160
3860
2560
1900
920
940
460
1440
700
2560
1240
4x3x5
2840
2140
3560
2660
2320
1780
5120
3860
2660
1900
1360
940
2000
1440
3600
2560
4x3x6
2840
2140
3560
2660
2320
1780
5120
3860
2660
1900
1360
940
2000
1440
3600
2560
4x3x8
2840
2140
3560
2660
2320
1780
5120
3860
2660
1900
1360
940
2000
1440
3600
2560
4x3x10
2840
2140
3560
2660
2320
1780
5120
3860
2660
1900
1360
940
2000
1440
3600
2560
4x3x13
2840
2140
3560
2660
2320
1780
5120
3860
2660
1900
1360
940
2000
1440
3600
2560
6x3x6
4980
2140
6220
2660
4100
1780
8960
3860
4600
1900
2360
940
3520
1440
6260
2560
6x3x8
4980
2140
6220
2660
4100
1780
8960
3860
4600
1900
2360
940
3520
1440
6260
2560

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PUMP
SIZE
Fx; N
Fy; N
Fz; N
Fr; N
Mx; Nm
My; Nm
Mz; Nm
Mr; Nm
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
Suct.
Disch.
6x3x10
4980
2140
6220
2660
4100
1780
8960
3860
4600
1900
2360
940
3520
1440
6260
2560
6x3x13
4980
2140
6220
2660
4100
1780
8960
3860
4600
1900
2360
940
3520
1440
6260
2560
6x3x16
4980
2140
6220
2660
4100
1780
8960
3860
4600
1900
2360
940
3520
1440
6260
2560
6x4x6
4980
2840
6220
3560
4100
2320
8960
5120
4600
2660
2360
1360
3520
2000
6260
3600
6x4x8
4980
2840
6220
3560
4100
2320
8960
5120
4600
2660
2360
1360
3520
2000
6260
3600
6x4x10
4980
2840
6220
3560
4100
2320
8960
5120
4600
2660
2360
1360
3520
2000
6260
3600
6x4x13
4980
2840
6220
3560
4100
2320
8960
5120
4600
2660
2360
1360
3520
2000
6260
3600
6x4x16
4980
2840
6220
3560
4100
2320
8960
5120
4600
2660
2360
1360
3520
2000
6260
3600
6x6x8
4980
4980
6220
6220
4100
4100
8960
8960
4600
4600
2360
2360
3520
3520
6260
6260
6x6x10
4980
4980
6220
6220
4100
4100
8960
8960
4600
4600
2360
2360
3520
3520
6260
6260
6x6x13
4980
4980
6220
6220
4100
4100
8960
8960
4600
4600
2360
2360
3520
3520
6260
6260
6x6x16
4980
4980
6220
6220
4100
4100
8960
8960
4600
4600
2360
2360
3520
3520
6260
6260
8x6x10
7560
4980
9780
6220
6220
4100
13840
8960
7060
4600
3520
2360
5160
3520
9420
6260
8x6x13
7560
4980
9780
6220
6220
4100
13840
8960
7060
4600
3520
2360
5160
3520
9420
6260
8x6x16
7560
4980
9780
6220
6220
4100
13840
8960
7060
4600
3520
2360
5160
3520
9420
6260
8x6x20
7560
4980
9780
6220
6220
4100
13840
8960
7060
4600
3520
2360
5160
3520
9420
6260
10x8x10
10680
7560
13340
9780
8900
6220
19260
13840
10040
7060
4880
3520
7600
5160
13500
9420
10x8x13
10680
7560
13340
9780
8900
6220
19260
13840
10040
7060
4880
3520
7600
5160
13500
9420
10x8x16
10680
7560
13340
9780
8900
6220
19260
13840
10040
7060
4880
3520
7600
5160
13500
9420
10x8x20
10680
7560
13340
9780
8900
6220
19260
13840
10040
7060
4880
3520
7600
5160
13500
9420
12x10x13
13340
10680
16000
13340
10680
8900
23400
19260
12200
10040
5960
4880
9220
7600
16420
13500
12x10x16
13340
10680
16000
13340
10680
8900
23400
19260
12200
10040
5960
4880
9220
7600
16420
13500
12x10x20
13340
10680
16000
13340
10680
8900
23400
19260
12200
10040
5960
4880
9220
7600
16420
13500
14x12x16
14240
13340
17800
16000
11560
10680
25560
23400
12740
12200
6240
5960
9500
9220
17080
16420
14x12x20
14240
13340
17800
16000
11560
10680
25560
23400
12740
12200
6240
5960
9500
9220
17080
16420

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7. OPERATING LIMITS AND PERFORMANCES CN SEAL-MV SERIES

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8. OUTLINE DRAWINGS
Please refer to specific documentation, supplied with the present manual.
9. NOISE AND VIBRATION
The pump noise depends primarily on the operating conditions. The operating condition of the pump during the
measurements is: the coupling of the pump with the electric motor on the bench with pumping fluids.
The A-weighted sound pressure level to front and side of the pump is below 85 dB (A).
When pump noise level exceeds 85 dBA attention must be given to prevailing Health ans Safety legislation, to
limit the exposure of operating personnel to the noise. An enclosure can be adopted to reduce emitted sound.
10. CHECKS TO PUMP DELIVERY, STORAGE
All M PUMPS PROCESS pumps are tested before shipment and carefully packed for transport: at the reception
of the pump make sure that the pump has not been damaged during the transport. If there are problems, contact
immediately the carrier and inform M PUMPS PROCESS about what happened.
So that the pump is preserved over time as best as possible, we recommend storing it away from the sun, bad
weather and dust, if not immediately installed or used for long periods.
Stoppers closing the input and output connections of the fluid must not be removed until installation. If provided
with electric motor, observe also the motor manufacturer’s storage formality.
The maximum allowable temperature range during storage, preservation and use must be between -15 e +40°C
with humidity between 10 e 90%.
11. SHIPPING AND HANDLING
You should carry out a precautionary check of the pump at the receiving to detect and report any damage in the
transport and handling operations. In case of breakages contact immediately M PUMPS PROCESS.
The precautions to ensure the stability of the pump concern the possible slips and overturning caused by
handling and transport, which must be prevented by setting the pump casing of the pump with ropes to the
vehicle frame.
Pump and motor assembly cannot be moved manually due to its high weight.
To move a pump positioned on a pallet, enlarge as maximum as possible the forks and then operate.
For a stable lifting the pump can be lift as indicated in the figures:
12. LIFTING
For a stable lifting the pump can be lift as indicated in the figures:
Bare frame pump without motor
Bare frame pump with motor
Centre of gravity approximately in the middle
Centre of gravity approximately in the middle

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These operations must be performed by a trained staff who is informed of the risk of these proceedings.
FORBIDDEN
It is forbidden to lift the pump using different lugs from the ones specially designed and
reported, as points of anchorage.
You cannot lift a pump and motor assembly using the eye-bolt of the electric motor only.
During the lifting the entire surrounding area is considered as a danger zone and must
be cleared by personnel not engaged in those operations.
It is indicated the possibility of transporting and handling the pump using the lugs designed for that use: you must
ensure that chains and shackles are able to withstand the weight of the pump (as shown in "TECHNICAL
DATA").
14. ASSEMBLY, INSTALLATION, CONNECTIONS, COMMISSIONING AND SETTING
14.1. Assembly
Install the pump on a solid foundation as close as possible to the liquid to be pumped, below the level, in a
position to facilitate maintenance and inspection.
Ensure that the pump doesn’t take rough shacks as this may damage the magnets of the internal and external
rotor or the silicon carbide bearings.
Ensure that the heated air from other units does not affect the pump; the air temperature must not exceed
40 °C, for higher temperatures contact your distributor M PUMPS PROCESS; ensure also the free circulation of
air cooling of at least ¼ the engine diameter, because either the pump or the motor should be able to dissipate
the heat by natural air convection. Insufficient cooling could lead to high surface temperatures of the bearings
seat, poor lubrication and premature failure of bearings. Useful is the monitoring of the surface bearings’
temperature.
It is always responsibility of the operator to keep low the temperature of the liquid so that not to superheat the
pump: in case of irregular pressure fluctuations and flow drop turn off the pump.
CAUTION
Normally you should mount the pump horizontally. If mounted vertically or inclined, the
pump, or rather the suction flange shall be placed in the lowest point. Leave a space of
at least 50 cm between the pump and any walls or pipes.
Vertical pumps cannot be installed horizontally or inclined.
When pumping liquid can reach high temperatures: form 60 °C upwards you must
install protections to prevent contact with hot pump parts;
Connect to the ground the entire pump casing to prevent accumulation of static
electricity;
If the pumped liquid can be dangerous to people and environment, the user must take
precautions for a simple and quick block in case of leakage for breakage/ replacement/
pump maintenance.
14.2. Connection of the pump to suction and discharge pipes
For a proper assembly aimed at an optimal use of the pump, you must follow these requirements:
pipes must be supported and kept in line regardless of the pump, until its connections, so that not to
impose on it;
links must not be subjected to stresses during the job ;
the maximum permissible forces and moments on flanges shall not exceed those listed in “technical
data”;
inlet pipes should be constructed with as few restrictions as possible in order to have the highest
available NPSH;
the length of pipes , particularly that of the inlet pipe must be minimized;
the pipe must be placed so that it is not possible the formation of air; if this is not possible, it should be
calculated the possibility of bleeding the air from the highest point ;
during suction use full section valves only;
14.3. Connection of the pump to suction and discharge pipes

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14.4. Lubrication
Three options are available for bearings lubrication,
- grease,
- oil mist
- oil cascade inside bearing housing.
Ball-Bearings Lubrication by Grease
Before placing the pump in operation, it must have grease supplied to the thrust bearings, the line bearing is life
greased.
Unplug the grease outlet plug located opposite the fitting in the bearing housing outer cover. Pump grease into
the fitting in the bearing housing outer cover until grease just begins to extrude from the
grease outlet. Replug the grease outlet and turn the shaft several times by hand to distribute the grease in
the bearings. Thereafter, re-grease thrust bearings at 3000 hour intervals of operation. Refer to Section
5.2.1 for proper grease type.
Pure Oil Mist Lubricated Ball-Bearings
Ensure that oil mist system is installed on the pump bearing housing and is operating.
Please refer to manufacturer’s instructions. No additional information is necessary.

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Oil Lubricated Ball-Bearings
Preparation of bearing housing
Bearing frame must be carefully cleaned before filling with oil.
It is also good practice to flush it with oil, compatible with the lubricating oil that will be used.
The reservoir is to be filled to appropriate level as illustrated in the picture below.
The oil level must be maintained at the correct level: decreasing of oil level may cause overheating and failure of
the bearings, while exceeding the correct level can result in leakage. The constant level oiler can be adjusted by
changing the height of the cross arms which support the glass reservoir, as illustrated for TRICO oiler below.

Pag. 18/49 Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX
Trico oiler setting (standard)
a) Initial fill via top of housing, using overflow plug to establish correct level (refer to the picture above
b) Release thumb screw and remove bottle. Establish a measurement from the center line of the oiler
connection in bearing housing to the upper cross arm of amounts indicated in the following table this can
be obtained by completely screwing down constant level oiler lower arm.
c) Fill bottle with recommended oil and install on holder. Remove and fill bottle as many times as is required
to fill the bearing housing up to the cross arm level and no air bubbles appear in the bottle.
d) Remove bottle and ascertain that the oil level is is desired, shown in the table below,from the center line
of oiler connection. Adjust upper cross arm as required and lock in place with lower arm.
Inspection
Inspect the oil level in the bearing housing and the
condition of the oil at least weekly. Oil is always
subject to progressive deterioration from use and
contamination from dirt and moisture which is the
cause of premature bearing wear. For oil lubricated
pumps, fill the bearing housing with correct grade of
oil to the correct level, i.e. constant level oiler bottle
(standard configuration) and sight glass (when fitted
on request).
Replenishment
Replenish the oil in the oiler as required. More frequent replenishment at high temperatures may be required.
Oil change
Frequency of oil change is dependent on pump service and environmental conditions. As a general guide, oil in
the bearing housing should be changed every 4000 operating hours, after the initial change.
Lubrication Specification
The ideal bearing lubricant is a straight well refined, neutral mineral, preferably of the turbine type. It should not
contain free acid, chlorine sulphur or more than a trace of free alkali. It is suggested that the oil conform to the
following physical characteristics.

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Pag. 19/49
Oil quantity in bearing house
PUMP RANGE
PUMP SIZE
OIL QUANTITY [Liter]
ARM
SETTINGS
[mm]*
OIL LEVEL
FROM THE
BOTTOM
OILER
[mm]*
2^ RANGE
2x1½x10
0.525
16
30
3x1½x10
3x1½x13
3x2x10
3x2x13
4x3x6
4x3x8
4x3x10
6x3x6
6x3x8
6x3x10
6x4x8
4^ RANGE
8x6x13
1.40
8x6x16
8x6x20
10x8x10
10x8x13
16
30
10x8x16
10x8x20
12x10x13
5^ RANGE
12x10x16
2.69
24
26
12x10x20
*WE CONSIDER THE STATIC CONDITION AFTER A PROPER PERIOD FOR COMPLETE OIL LEVELLING
BETWEEN OILER AND BEARING FRAME
Connection of the pump to suction and discharge pipes
For a proper assembly aimed at an optimal use of the pump, you must follow these requirements:
pipes must be supported and kept in line regardless of the pump, until its connections, so that not to
impose on it;
links must not be subjected to stresses during the job ;
the maximum permissible forces and moments on flanges shall not exceed those listed in “technical
data”;
inlet pipes should be constructed with as few restrictions as possible in order to have the highest
available NPSH;
the length of pipes , particularly that of the inlet pipe must be minimized;
the pipe must be placed so that it is not possible the formation of air; if this is not possible, it should be
calculated the possibility of bleeding the air from the highest point ;
during suction use full section valves only;

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NO
SI
-if the suction tube was larger than the suction flange, you will use an eccentric reduction, in order to prevent
formation of air and turbulence;
-if there is a possibility that the maximum working pressure can be overcome, for example due to excessive
suction pressure, you should take appropriate measures by including a safety valve in the pipe;
-Avoid using quick-closing valves, because sudden changes of pressure cause water hammer very
dangerous for the pump and the pipes;
-Before installing the pump, make sure the suction line is clean and/or provided with a filter to protect the
impeller and the stationary bearings from damages incurred by slag, or other foreign particles , especially
when you start the installation for the first time.
Electrical connections:
DANGER
The pump is provided with or without electric motor: only qualified personnel should
carry out mechanical connection of the pump to the motor (for the model without motor)
and the electrical connections of the motor to the electrical system. Please read carefully
the instructions of the manufacturer of the motor or the manual before you complete the
installation.
Make sure that the motor doesn’t start during maintenance jobs.
14.5. Checks for the proper operation
We recommend installing a pressure gauge on both inlet and outlet pipes to allow the operator to easily control
the proper pump functioning in relation to the required operating point: in case of cavitation or other malfunctions,
there will be obvious pressure fluctuations.
Check the differential pressure of the pump between the suction and discharge connections to verify that it works
in the point of work provided.
Check that the absolute pressure at suction is not so low to cause the cavitation.
CAUTION
The absolute pressure at pump suction (m) must be at least 0,5 to 1 m, the vapour
pressure of the pumped liquid, in order to avoid cavitation.
Cavitation should always be avoided as it is very dangerous for the structure of the pump.
Do not dry run the pump!
Commissioning and operator training
With regards to the proper commissioning, starting and controls to be carried out before, during and after the first
start, please refer to APPENDIX B, which must be filled and returned to M PUMPS to activate product warranty.