Pompetravaini AT-TB Series User manual

(Rev. 2.5_05-2019)
OPERATING MANUAL
FOR
CENTRIFUGAL PUMPS
AT - TB...
MC... - TC...
TMA

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
2
OPERATING MANUAL
INSTALLATION, START-UP AND MAINTENANCE
FOR CENTRIFUGAL AND SELF-PRIMING PUMPS
This manual applies to the listed below centrifugal pump series and/or affiliated series:
AT - TBH - TBA - TBK - TBAK
MC - MEC - TCK
TCH / MCU-CH
TCA - TCT - TCD
TMA
All pumps are manufactured by: POMPETRAVAINIS.p.A.
Via per Turbigo, 44 - Zona Industriale - 20022 CASTANO PRIMO - (Milano) - ITALIA
Tel. [phone] - Fax. [phone] - www.pompetravaini.it
Distributor:
WARRANTY: All products manufactured by POMPETRAVAINI are guaranteed to meet the conditions listed on the
general terms and conditions of sale and/or conditions listed on the Order Confirmations.
Failure to strictly adhere to the instructions and recommendations listed in this manual will void the
manufacturer’s warranty. Guarantee will be preserved only if the pump maintenance is carried out by
Pompetravaini or an authorized service. Any modification introduced to the pump without the
authorization of Pompetravaini will lead to the loss of the guarantee.
If it is strictly necessary to dismantle the pump, please consult Disassembling Instructions on our website
"www.pompetravaini.it".
This manual is valid only for the listed pump series. This manual IS NOT for the total installation. Instruction and
maintenance manual for the installation must be obtained from the engineer that designed the installation.
Furthermore the installation manual will take precedence over the pump manual.
The liquids handled by the pumps and also their parts could be potentially dangerous for persons and
environment: provide their possible disposal in conformity with the laws into force and a proper environment
management.
The present manual is not assigned for pumps subjected to the ATEX 2014/34/EU directive. In case the pump
is assigned in environments subjected to the application ATEX 99/92/CE directive or in case the pump is
provided with a nameplate indicating the ATEX stamp, it strictly forbidden proceed to start up the pumps but
necessary to consult POMPETRAVAINI for clarifications.
For pumps subjected to the ATEX 2014/34/EU directive it is available a dedicated integrative manual.
According to what expected from 2012/19/UE Directive on Waste Electric and Electronic Equipment the
electrical pump assembly from us supplied must not be disposed with common waste because it is
composed of different materials that can be recycled at the appropriate facilities. Inquire with your disposal
company or by municipal ecological office to operate in compliance with the applicable laws.
The electrical pump assembly at the time of disposal must be previously reclaimed from the pumped product.
After reclamation the electrical pump assembly is not potentially dangerous for human health and
environment, not containing harmful substances according to 2011/65/UE (RoHs) Directive, but if
abandoned in the environment will have a negative impact on the ecosystem.
The abandonment in the environment of the apparatus or the illegal disposal of the same are
punished by law.
In preparing this manual, every possible effort has been made to help the customer and operator with the proper installation and operation of the pump.
Should you find errors, misunderstandings or discrepancies please do not hesitate to bring them to our attention.
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Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 3
INDEX
1 - General instructions
2 - Safety instructions
3 - In case of emergency
3.1 - Basic first aid
4 - Pump outlines
4.1 - Pump model numbers and materials of construction tables
5 - Unpacking, lifting and moving instructions
6 - Storage instructions
7 - Installation instructions
7.1 - Installation of pump/motor assembly
7.2 - Suction and discharge piping
7.2.1 - Suction piping
7.2.2 - Discharge piping
7.2.3 - Piping cleaning
7.2.4 - Pressure testing
7.3 - Accessories and auxiliary connections
8 - Mounting and alignment instructions
8.1 - Monoblock pump/motor and pump/motor assembly mounted on a baseplate
8.2 - Alignment procedure for monoblock and for pump/motor assembly on baseplate
8.3 - Alignment instructions
8.4 - Coupling pump series “TCHM” and “TCTM”
9 - Electrical connections
10 - Check list prior to start-up
11 - Starting, operating and stopping procedures
11.1 - Start-up
11.1.1 - Submersed pump (vertical design)
11.1.2 - Pump with flooded suction
11.1.3 - Pump with suction lift (from well)
11.1.4 - Start-up a pump without back pressure at discharge side
11.1.5 - Start-up a pump with back pressure at discharge side
11.2 - Operation
11.3 - Shut down
12 - Operating check list
13 - Lubrication instructions
13.1 - Grease lubricated ball bearings
13.2 - Oil lubricated ball bearings
14 - Packed stuffing boxes
14.1 - Adjusting the packing
15 - Mechanical seals
16 - Trouble shooting chart - problems, causes and solutions
17 - Pump repair, disassembly and disposal from installation
18 - Spare parts
19 - Engineering data
19.1 - Starting torque
19.2 - Typical performance curves
19.3 - Units conversion table
19.4 - Noise level and vibrations
KEY TO SYMBOLS
Indications for the pump preservation
Signals for the operator’s safety.
DANGER: indicates imminent conditions o
f
danger of serious harm or death.
CAUTION: indicates a possible danger of mino
r
harm.
Warnings for the environment safeguard
Magnetic dangers for the operator’s safety.
Warnings for the ATEX Directive 2014/34/EU Electric dangers for the operator’s safety.
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Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
4
1 - GENERAL INSTRUCTIONS
This manual is intended to provide reference to:
- pump safe application and operation
- pump installation and maintenance instructions
- pump start-up, operation and stopping procedures.
The pump user must complete the section at the end of this manual where the design conditions for the pump are
recorded. The manual must be filed in a safe place and be accessible to the operator and to the maintenance personnel.
The qualified personnel responsible for the operation or maintenance of the pump should read CAREFULLY the whole
manual before operating or working on the pump. Qualified personnel are those with experience, knowledge and have a
good familiarity with the working safety regulations. They usually have knowledge of basic first aid.
The pump is to be used only for the applications specified on the confirming order for which POMPETRAVAINI
has selected the design, materials of construction and tested the pump to meet the order specifications.
Therefore the pump CANNOT be used for applications other than those specified on the order.
In the event the pump is to be used for different applications, please contact the sales office or representative
of the manufacturer. POMPETRAVAINI declines to assume any responsibility if the pump is used for differen
t
applications without prior written consent confirmation.
Pumps are for industrial and continual use in installations fit for the purpose by authorized and trained personnel.
The use in unfit or unprotected installations, without proper precautions preventing the contact with untrained
personnel or children, is strictly forbidden
If the constructive details functioning data of the pump in use aren’t available they could
be requested to POMPETRAVAINI specifying the pump type and serial number that
are printed on the pump nameplate. Always refer to this for further requests of
information or replacement components.
The user is responsible for the verification of the ambient conditions where the pump
will be stored or installed.
Extreme low or high temperatures may severely damage the pump unless proper
precautions are taken.
POMPETRAVAINI does not guarantee repairs or alterations done by user or other unauthorised personnel.
Special designs and constructions may vary from the information given in this manual. Please contact POMPETRAVAINI
should you have any difficulty.
NOTE: Drawings appearing in this manual are only schematics and not to be used for construction.
For more specific information contact the Engineering Department of POMPETRAVAINI or the authorised
local representative.
2 - SAFETY INSTRUCTIONS
CAUTION: CAREFULLY READ FOLLOWING INSTRUCTIONS.
Strictly adhere to the instructions listed below to prevent personal injuries and/or equipment damage.
- ALWAYS apply the pump for the conditions outlined on the confirming order.
- Be ALWAYS informed on locations of first aid sites inside the company and carefully read safety and medical first aid
prescriptions in force.
- ALWAYS have a fire extinguisher in the vicinity of the pump installation.
- Any work on the pump must ALWAYS be carried out by at least 2 qualified people and expressly authorized.
- Electrical connections on the motor or accessories must ALWAYS be carried out by authorised personnel and in
accordance to the local codes.
- When approaching the pump ALWAYS be properly dressed (avoid use of clothes with wide sleeves, neckties,
necklaces, etc.) and/or wear safety equipment (hard hat, safety glasses, safety shoes, etc.) adequate for the work to
be done. Also refrain from wearing long and loose hair.
- DO NOT attempt to remove the safety guards when the pump is operating.
- After completion of the work ALWAYS re-install the safety guards previously removed.
- DO NOT operate the pump in the wrong direction of rotation.
- NEVER put hands or fingers in the pump openings or holes.
- ALWAYS disconnect the power to the motor prior to working or removing the pump from the installation.
- Make sure you have taken the necessary steps to prevent a possible inadvertent return of tension.
- Ensure the proper isolation of the components and ground connection before inserting the tension.
i
H
QKW
mbar
3
PUMP TYPE
SERIAL NO.
ITEM
YEAR
ISO 9001 Certified
20022 CASTANO PRIMO (MILANO) - ITALY
abs.m /h
m.c.l.
S.p.A.

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 5
- ALWAYS stop the pump prior to touching it for whatever the reason. Wait for the complete pump stopping and make
sure that all the installation control devices are properly set in order to avoid any return flow.
- Pump and piping connected to the pump must NEVER be under pressure when maintenance or repair is carried out.
- NEVER work on the pump when it is hot.
- NEVER touch pump or piping having temperatures higher than 70°C or lower than -10°C.
- ALWAYS be careful when handling pumps that convey acids or hazardous fluids.
- NEVER step on pump and/or piping connected to the pump.
- ALWAYS make sure that the pump is permanently fixed and steady to the installation (i.e. during removal, handling,
installation, etc.)
CAUTION!
Pumps type TCK, TBK and TBAK create a high magnetic field. Personnel should take proper precautions if they
are wearing pace-makers or if they are using instrumentation sensitive to magnetic fields.
The listed below minimum distances must be kept:
- When the magnetic rotor parts are disassembled:
users of pace-maker = 2 meters floppy disk; magnetic cards, etc. = 1 meter
- When the magnetic rotor is mounted in the pump:
users of pace-maker = 1 meter floppy disk; magnetic cards, etc. = 0,5 meter
DANGER!
Possible contact with hazardous media and hazardous substances There are certain components in the pump
which may be dangerous to people coming in their contact even during normal operation procedures and/o
r
maintenance, see table 1.
Take care of their possible disposal according to the laws into force and to a safe local environment
management.
CAUTION!
Danger due to smokes or vapours. In case smokes or vapours are released by the pump do not inhale and
immediately stop the pump for inspection.
Tab. 1
MATERIAL USE MAJOR RISKS
Oil and grease General lubrication, ball bearings Skin and eye rash
Plastic & elastomer
components
O-Ring, V-Ring, splash ring, coupling
dowels Smoke & vapours in case of overheating
Teflon & Kevlar fibbers Packing rings Release of dangerous powder, release of smoke if
overheated
Paints & varnishes Pump outside surface Release of powder and smoke if working the painted
areas. Flammable
Protective liquid Pump inside surface Skin and eye rash
3 - IN CASE OF EMERGENCY
In the event of pump break-down and/or loss of pumped fluid, immediately disconnect the electrical power to the motor
(see chapter 11) and contact the responsible personnel in charge of the installation, which should intervene with at least
two people paying particular attention to the fact that the pump may be handling dangerous fluids, hazardous to the health
and environmentally unsafe.
After the causes for the emergency have been addressed and resolved, it will be necessary to follow the starting
procedures (see chapter 10) for the start-up of the pump/motor assembly.
3.1 - BASIC FIRST AID
In the event dangerous substances have been inhaled and/or come in contact with the human body, immediately follow
the instructions given in the company’s internal medical safety procedures.

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
6
4 - PUMP OUTLINES
The machines are designed for a service life of 20 years, excluding wear parts (such as wear rings, mechanical seals,
shaft sleeves, gasket, O-rings) and bearings. After this period, the machine should be dismantled. The expected service
life depends on the working conditions: service or duty load. Misoperation or improper maintenance can result in a
machine failing to meet these criteria. Maintenance indications are specified in the specific paragraphs for each
component.
The instructions given in this manual refer to the listed below single stage and multistage centrifugal pumps, horizontal
or vertical mounted.
NOTE: Capacities and pressures are approximated and refer to the maximum attainable values for pumps applied in
standard conditions at room temperature.
TCH / MCU-CH
Single stage centrifugal pumps for clean liquids designed to DIN 24256/ISO 2858 and 5199
standards - Design with closed impeller - Capacity to 2000 m3/h, Max. pressure 16 bar - Flanges PN
16
TCA
Single stage centrifugal pumps for abrasive liquids to DIN 24256/ISO 2858 and 5199 standards -
Design with fully open impeller - Capacity to 100 m3/h, Max. pressure 10 bar - Flanges PN 16
TCT
Single stage centrifugal pumps for very dirty liquids derived from DIN 24256/ISO 2858 standards -
Design with open vortex impeller - Capacity to 250 m3/h, Max. pressure 7 bar - Flanges PN 16
TCD
Single stage centrifugal pumps for Thermal fluids (Oils) to DIN 24256/ISO 2858 standards - Design
with closed impeller - Capacity to 350 m3/h, Max. pressure 10 bar - Flanges PN 16
TCS
Single stage centrifugal pumps with inspection opening for clean and dirty liquids - Design with
closed and open impeller - Capacity to 550 m3/h, Max. pressure 4 bar - Flanges PN 10
MEC
Semi-axial centrifugal pumps for large flows of clean and dirty liquids - Design with open impeller -
Capacity to 2100 m3/h, Max. pressure 4 bar - Flanges PN 10
TCN
Single stage centrifugal pumps for clean and dirty liquids - Design with closed impeller - Capacity to
2000 m3/h, Max. pressure 6 bar - Flanges PN 10
TCK
Magnetic drive single stage centrifugal pumps for toxic and contaminated liquids - Designed to DIN
24256/ISO 2858 standards - Design with closed impeller - Capacity to 300 m3/h, Max. pressure 16
bar - Flanges PN 16
MILLS
Pumps derived from the series TCH with special mixing impeller
AT
Self-priming multistage centrifugal pumps with dual lateral channel. Low NPSH requirements. Capacity
to 31 m3/h, Max. pressure 7 bar - Flanges PN 40
TBH
Self-priming multistage centrifugal pumps with single lateral channel - Capacity to 70 m3/h, Max.
pressure 35 bar - Flanges PN 40
TBK
Magnetic drive self-priming multistage centrifugal pumps with single lateral channel - Capacity to 70
m3/h, Max. pressure 35 bar - Flanges PN 40
TBA
Self-priming multistage centrifugal pumps with centrifugal pre-stage with very low NPSH
requirements. Capacity to 35 m3/h, Max. pressure 35 bar - Flanges PN 40
TBAK
Magnetic drive self-priming multistage centrifugal pumps with centrifugal pre-stage with very low
NPSH requirements. Capacity to 35 m3/h, Max. pressure 35 bar - Flanges PN 40
TMA
Multistage centrifugal pumps for clean liquids, medium and high pressures - Capacity to 45 m3/h,
Max. pressure 40 bar - Flange inlet PN 16, flange outlet PN 40
The flanges standard (NP 16 or NP 40) does not refer to the maximum pump performance but it indicates the maximum
pressure the pump can be subjected to.
For information regarding temperature and pressure LIMITATIONS applicable to the varying designs, types and materials
of construction please contact POMPETRAVAINI or your closest authorised representative.
The maximum operating pressure is normally the maximum discharge pressure developed by the pump at the discharge
connection.
4.1 - PUMP MODEL NUMBERS AND MATERIALS OF CONSTRUCTION TABLES
Pump nameplate affixed to each pump contains model number, serial number and year of manufacture. Interpretation of
pump model number may be attained with the aid of the following table. The pump model is such that it gives information
pertaining to the pump type and design.
Listed below are some examples of pump nomenclatures:
Pumps series MC... - TC... =
TCH V 50 - 200 A / 1 - C / A3 - M / T
TCH Pump type
1Constructive project number
VVertical mounting
C Shaft seal type
50 Diameter discharge flange
A3 Materials of construction (see table)
200 Impeller nominal diameter
MMonoblock design with flanged motor
AHydraulic project modification
TSpecial design

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 7
Pumps series AT – TB… = TBH 315 A / 1 - C / A3 - M / T - V - Z
TBH Pump type A3 Materials of construction (see table)
31xPump size MMonoblock design with flanged motor
xx5Number of stages TSeal chamber cooling design
AHydraulic project modification VVertical mounting
1Constructive project number ZSpecial design
C Shaft seal type
Pumps series TMA = TMA 32 - 7 A / 1 - C / A3 - M / T - V - Z
TMA Pump type A3 Materials of construction (see table)
32 Pump size MMonoblock design with flanged motor
7Number of stages TSeal chamber cooling design
AHydraulic project modification VVertical mounting
1Constructive project number ZSpecial design
CShaft seal type
Generic materials for STANDARD CONSTRUCTION: pumps MC... - TC...
Description GS RA A3 HC DU
Casing Ductile iron
Hastelloy C ASTM-CN7M
Cover casing
Impeller Cast iron
Stainless steel AISI 316
ASTM-CF8M
Shaft Incoloy 825
Bearing frame Cast iron
Generic materials for STANDARD CONSTRUCTION: pumps AT - TB…
Description GH RA A3 B2 GP
Casing Ductile iron Bronze Ductile iron
Element Cast iron Cast iron
Impeller Brass
Stainless steel AISI 316
ASTM-CF8M
Brass
Shaft Stain. steel AISI 420 Stain. steel AISI 420
Bearing frame Cast iron
Generic materials for STANDARD CONSTRUCTION: pumps TMA
Description F RA A3
Casing Ductile iron
Stage casing Cast iron
Impeller Stainless steel AISI 316 - ASTM-CF8M
Shaft Stainless steel AISI 420
Bearing frame Cast iron
For detailed information on materials of construction, (standard or special) for pumps TCD, TCK, MEC, TBK and TBAK
please contact POMPETRAVAINI or your local representative.
In case the metallic pump wetted parts come into contact with aggressive liquids it is recommended to stick to the following
limitations:
- pH limit for Cast Iron and Ductile Iron ≥6
- pH limit for Stainless Steel ≥2,5
The above values are approximate and refer to ambient temperature. It is recommended to contact POMPETRAVAINI
for doubts, particular conditions or in case different materials are used.
5 – UNPACKING, LIFTING AND MOVING INSTRUCTIONS
Upon receipt verify that the material received is in exact compliance with that listed on the packing slip.
When unpacking follow the instructions listed below:
- Check that no visible damage exists on the crate that could have occurred during transport
- Carefully remove the packaging material
- Check that pump/or accessories such as tanks, piping, valves, etc. are free from visible markings such as dents,
scratches and damage which may have occurred during transportation
- In the event of damage, report this immediately to the transport company and to POMPETRAVAINI’s customer service
department.

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
8
DANGER!
Danger due to cut, prick or abrasion Take immediate actions to dispose of possible packaging parts that may
generate injuries or risks (for example edges, nails, splinters, etc.)
We remind that the single stage centrifugal pumps supports contain lubricating oil.
Organize the right management of materials subjected to controlled and differentiate disposal (for example
plastic, cartoon, polystyrene materials, etc.) according to the laws into force and to a safe local environment
management. according to the laws into force and to a safe local environment management.
If the pump will be stored, as foreseen in our Operating Manuals, we recommend a proper care to avoid oil
dropping on the ground.
The pump must ALWAYS be moved and transported in the horizontal position.
Before transportation check on the nameplate, in the transportation and technical documents for:
- total weight
- centre of gravity
- maximum outside dimensions
- lifting points location.
DANGER!
Danger due to overturning or crushing For a safe lifting it is recommended to use ropes, or belts properly
positioned on the pump and/or lifting eyebolts with correct movements, to prevent material damages and/o
r
personal injuries.
The fig. 1 shows several additional examples of lifting.
Avoid lifts whereby the ropes or straps, form a triangle with the top angle over 90° (see fig. 2).
Lifting eyebolts fitted on single components of the assembly (pump or motor) should not be used to lift the total assembly.
Prior to moving the unit from an installation, always drain any pumped fluid from the pump, piping and accessories, rinse
and plug all openings to prevent spillage.
The fig. 3 shows several additional examples of lifting to be avoided.
CAUTION!
Possible contact with fluids or harmful substances. Before removal after a period of operation, the pump,
together with auxiliary piping and jacketing, must be drained and decontaminated from the handled media.
Every hole and opening communicating with the inside of the pump must be properly plugged.
For removing the pump from the installation see chapter 17. Operate provided with apposite protective devices.
6 - STORAGE INSTRUCTIONS
After receipt and inspection the unit, if not immediately installed, the unit must be repackaged and stored in the best way.
For a proper storage proceed as follows:
- store the pump in a location which is closed, clean, dry and free of vibrations
- do not store in areas with less than 5°C temperature (for lower temperature it is necessary to completely drain the
pump of any liquids which are subject to freezing)
POSSIBILITY OF FREEZING!
Where the ambient temperature is less than 5°C it is recommended to drain the pump, piping, separator, heat
exchanger, etc. or add an anti-freeze solution to prevent damage to the equipment.
It is possible to use as antifreeze a mixture of surface-active glycol or other suitable products making sure they
are compatible with both pump gaskets and elastomer.
- fill the pump with a rust-preventative liquid that is compatible with the pump gaskets and elastomer. Rotate the shaft
by hand to impregnate all internal surfaces. Drain the excessive liquid from the pump and associated piping (see
chapter 11).
Please note that the pumps with cast iron internal parts have been treated at the factory, prior to shipment, with a rust-
preventative liquid: this liquid is capable of protecting the pump against rust for a period of 3 to 6 months.
A further solution, for long term storage, is to fill the pump with the rust inhibitor, rotate the pump shaft by hand to
eliminate any air pockets (the liquid must be suitable with gasket, elastomer and pump materials).
- plug all openings that connect the pump internals to the atmosphere
- protect all machined external surfaces with an anti-rust material (grease, oils, etc.)
- cover the unit with plastic sheet or similar protective material
- rotate pump shaft at least every three months to avoid possible rust build-up or seizing
- keep the pump in a dry and clean place not subjected to vibrations caused by other sources
- any pump accessories should be subjected to similar procedure.
LONG TERM STORAGE INSPECTION
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i

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 9
Even if the machine is properly stored, as described in the instructions above, in case of long term storage the
following instructions must be taken into account.
After a storage period of 6 months the lubricant should be replaced completely.
In case of a storage period longer than 12 months, the machine shall be carefully checked and inspected
before installation. Following actions should be considered particularly:
- complete replacement of lubricants
- inspection of the bearings, they should be cleaned if necessary
- inspection of O-rings and gaskets (it is recommended to replace them)
- inspection of mechanical seal integrity (replace if necessary).
Fig. 1
Fig. 2 Fig. 3
OK
NO

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
10
7 - INSTALLATION INSTRUCTIONS
CAUTION!
Avoid installing the unit in narrow areas and lacking of ventilation where unfavourable conditions for the personnel
may take place. Allow the personnel a good visibility of the pump assembly by providing a proper lighting.
A proper pump installation must not transmit vibrations to ambient in the permanent presence of personnel.
Information to determine the piping sizes and floor space requirements can be obtained from dimension drawings and
other engineering data. The information required is:
- size and location of suction and discharge flanges
- size and location of all connections for flushing, cooling, heating, draining, etc.
- location and size for mounting bolts for monoblock pump and/or baseplate and/or frame.
In the event additional accessories are required to complete the installation such as separators, piping, valves, etc. refer
to following chapters 7.1 - 7.2 - 7.3.
Proper lifting devices should be available for installation and repair operations.
Pump assembly should be installed in an accessible location with adequate clear and clean space all around for
maintenance, so that an efficient and proper installation can be made.
It is important to have proper room around the unit for ventilation of motor. Avoid installing the unit in hidden locations,
dusty and lacking of ventilation.
Pump/motor assembly should not be installed in narrow areas, dusty, toxic and explosive ambient. In the event this is not
possible it is recommended to ventilate the areas to help cooling the motor (minimum 0,6 metres of empty room around).
All components used in the installation should comply with the safety codes. The installation must not transmit vibrations
to the pump.
Select a mounting pad that will minimise vibrations or torsion of the pump baseplate or frame. It is generally preferred to
have a concrete base or sturdy steel beams.
It is important to provide adequate anchor bolting for the pump frame or baseplate to be firmly attached to the foundations
(see fig. 4).
A
NCHOR BOLT
CONCRETE
SPACER
BASEPLATE
Fig. 4
Concrete pads and other concrete works must be aged, dry and clean before the pump assembly can be positioned in
place. Complete all the work relating to the foundations and grouting of the pump assembly, before proceeding with the
mechanical and electrical portion of the installation.
7.1 - INSTALLATION OF PUMP/MOTOR ASSEMBLY
Place the pump assembly on the foundation pad aligning the anchoring bolts.
If necessary use metal spacers to level the unit and check the flange connection for good horizontal and vertical planes.
Tighten the foundation bolts.
Check again the level of the assembly and proceed with the pump/motor alignment verification as discussed in paragraph
8.2.
In cases where the pump is installed on a baseplate separated from that of the motor (due to expected piping forces,
moments or as it often is in cases of large units) it is recommended to first install the pump and then proceed with the
motor installation and alignment.
7.2 - SUCTION AND DISCHARGE PIPING
Identify first locations and dimensions of all connections required to interconnect the pump with the installation, then
proceed with the actual piping: connect the pump suction (see fig. 5) and discharge flanges, the service liquid line and all
other service connections.
CAUTION!
Possible contact with hazardous media and hazardous substances, cold or warm. Pay maximum attention to
the proper connection of the system pipelines to the respective pump’s connections.
Operate only provided with apposite protective devices.
To prevent the introduction of any limb in the pump during installation, do not remove protection cap from flanges
or cover from openings until the piping is ready for hook-up.

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 11
Inlet and discharge piping should be of same size as the pump flanges, where possible increase the pipe size but NEVER
decrease the size.
In general the liquid velocity in the suction piping should not exceed 2 m/s and in the discharge piping should be less than
3 m/s. Higher liquid velocities will result in higher pressure drops which could create cavitation in the suction piping and
excessive pressure losses in the discharge piping, which would negatively affect the system performance and the pump.
Where possible, avoid using piping turns and especially short radius elbows.
When using larger pipe sizes than the nominal, the reduction from a larger diameter to a small diameter should be gradual
and with conical configuration, the length of the conical area should be 5 to 7 times the difference in size of the two
diameters.
Piping should always be supported to neutralise any forces, moments, piping weights, thermal expansions, etc.
which could create pump/motor misalignment, deflections and overloading to foundation bolts.
Pipe joints should be by means of flanges with flange gaskets of proper size and material.
Flange gaskets should be properly centred between the flange bolts so that there is no interference with the flow of the
liquid.
There should not be any tensions, deformations or misalignment of the piping when loosening the bolts holding the flanges
together.
Any thermal shocks and/or excessive vibrations should be controlled by means of expansion joints, flexibles, etc. having
same size as the piping.
PIPING SUPPORT
JOINT
2%
PUMP
SUCTION
2%
PUMP
SUCTION
PIPING SUPPORT
JOINT
PIPING FROM BELOW
PUMP
PUMP
PIPING FROM ABOVE
Fig. 5
7.2.1 - Suction piping (see fig. 5 and 6)
To prevent loosing pump priming absolutely avoid formation of air pockets in the suction piping. This piping therefore
should have a slope toward the reservoir in the case of suction lift installation, and toward the pump in the case of the
flooded suction installation.
Isolating valve should only be on the fully open or fully closed positions and NEVER as a flow regulator. The valve should
be installed with the stem in the horizontal position relative to the flow in the piping and at a distance from the pump
suction flange of at least 10 times the pipe size.
Depending upon the application, a non return valve or a foot valve should be fitted in the suction piping, a strainer or filter
will prevent solids from entering the pump and a pressure or vacuum gauge will enable reading the pump inlet pressure.
All components listed above will create pressure drops which must be taken into consideration in the design stage.
Where more than one pump is installed, every pump should have its own separate suction piping; if a stand-by pump is
installed the two inlets can be connected to a common manifold with a single suction piping.
For pumps series TBA, in case of negative suction (from well) and only if NOT provided with check valve or foot
valve, contrary to what above indicated it should be necessary that the suction piping will have a slope toward
the pump.
i
i

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
12
7.2.2 - Discharge piping (see fig. 6)
Right after the pump discharge flange install a non return valve will stop dangerous water hammer which could seriously
damage the pump discharge casing, a flow regulating valve (Globe or Needle valve), a pressure gauge can be connected
to the threaded connection under the pump discharge flange, a vent valve should be fitted in this piping to fill pump and
piping for initial start-up.
7.2.3 - Piping cleaning
CAUTION!
Possible contact with hazardous media and hazardous substances, cold or warm. Operate only provided with
apposite protective devices.
Before installation start-up clean piping and any reservoirs removing loose materials and foreign particles.
Particular attention for cleaning should be for installations where welding of piping and components has taken place.
7.2.4 - Pressure testing
DANGER!
Danger due to fluids in pressure. Carry out sealing tests provided with apposite protective devices.
When the installation has been completed it is necessary to test the piping for both static pressure and vacuum.
Testing should be carried out in accordance to the applicable standards for the piping function and the operating
pressures.
NON RETURN VALVE
(FOOT VALVE)
FILTER
PRESSURE GAUGE
VALVE
ISOLATING
SUCTION
FLOODED
p
om
p
etravai ni
FLOW CONTROL VALVE
STRAINER
SUCTION
LIFT
Pump series MC... - TC...- MILLS
MINIMUM FLOW ORIFICE
BY-PASS LINE
(FOR INSTALLATIONS
W
HERE LINE SHUT-OFF
IS POSSIBLE)
FLOODED
SUCTION
SUCTION
LIFT
STRAINER
ISOLATING VALVE
(FOOT VALVE)
FILTER
ISOLATING VALVE
PRESSURE GAUGE
FLOW CONTROL VALVE
NON RETURN VALVE
MINIMUM FLOW ORIFICE
BY-PASS LINE
(FOR INSTALLATIONS
W
HERE LINE SHUT-OFF
IS POSSIBLE)
Pumps series TMA
ISOLATING VALVE
(FOOT VALVE)
FILTER
PRESSURE GAUGE
LIFT
SUCTION
ISOLATING VALVE
NON RETURN VALVE
FLOW CONTROL VALVE
STRAINER
SUCTION
FLOODED
Pump series AT - TBH - TBK
PRESSURE GAUGE
NON RETURN VALVE
ISOLATING
VALVE
FILTER
(FOOT VALVE)
SUCTION
FLOODED
FLOW CONTROL
VALVE
STRAINER
SUCTION
LIFT
Pump series TBA - TBAK
Fig. 6A

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 13
Pump series TCK
NON RETURN VALVE
FLOW CONTROL VALVE
PRESSURE GAUGE
FILTER
Pump series MC... - TC... - VERTICAL construction
Fig. 6B
7.3 - ACCESSORIES AND AUXILIARY CONNECTIONS
Depending on the application accessories may be installed to test the pump performance (instrumentation to measure
pressure, temperature, capacity, etc.) and/or for necessary operations (cooling, heating, flushing of seals, etc.).
When accessories are required the following should be considered:
a) Pressure and vacuum gauges must be properly anchored and connected at the measuring points located at pump
flanges or near the flanges, using approx. 8 mm. diameter tubing with “pig tail” configuration to alleviate pressure
fluctuations.
For safety purposes, isolating and vent valves should be fitted before these instruments (see fig. 7).
b) Temperature gauges should be installed with thermowells selected for the
specific purpose and fitted in strategic locations where the reading is required
(see fig. 8).
c) Every pump is fitted with draining connections at the pump casing.
If required, pump drain and mechanical seals leakages can be piped to a
container located nearby on the floor or (if available) to the drain catch basin
for the total installation.
The pump draining piping should be fitted with an isolating valve and both
should be suitable for the pumps maximum operating pressure.
d) Cooling, heating, flushing of mechanical seals and other piping must be
connected only to the designated connections located on the pump (see fig.
9-10-11-12 and chapter 15 for more details).
Only for pumps TCD/2-SP series is necessary to arrange an external flushing for
the mechanical seals (Quench-like). Directly or with a seal tank by means of a
vegetable or mineral oil compatible with the pumped oil (see fig. 10A and 12).
This is required to guarantee a proper lubrication and cooling of the mechanical
seal and Viton radial seal rings, to avoid the possible leakage towards outside and the intake of air into the process. Also
to prevent the formation of air bubbles, preventing a proper lubrication, which can lead to the damaging the sealing, in
case of high temperature, could even lead to dangerous combustion.
All tubing and connections must be a minimum of same size as the connection on the pump.
Insulation, if required, must be limited to the pump body, leaving all other components such as bearing frame and
motor uncovered for heat dissipation.
e) Controlling the minimum capacity.
When the pump operates near the shut-off with almost no flow, almost all the motor power is transformed into thermal
energy which is absorbed by the pumped liquid.
If the capacity is less than the minimum recommended (10-15% of pump capacity at its best efficiency point) not only
will there be excessive load on the pump support and bearings but the liquid could evaporate resulting in damage to
the impellers and wear rings with possibility of the pump seizing.
To prevent these problems it is recommended the installation of a minimum flow valve in the discharge piping, right
after the pump but before the flow regulating valve.
Fig. 7
°C
Fig. 8
FLOODED
SUCTION
SUCTION
LIFT
FILTER
POWER SUPPLYISOLATING
VALVE
HEAT SENSOR(FOOT VALVE)
RECORDER
STRAINER
NON RETURN VALVE
FLOW METER OR FLOW SWITCH
A
CCELOROMETER SENSOR
PRESSURE GAUGE
FLOW CONTROL VALVE

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
14
In the event the flow regulating valve being excessively throttled or even completely closed, there will always be the
required minimum liquid flow recirculated from the pump discharge to the suction piping of the pump.
The other device which may be fitted in this by-pass line (from pump discharge, before flow regulating valve, to pump
suction) is a calibrated orifice sized for the minimum liquid flow required by the pump.
f) Pumps with magnetic drives (series TBK, TBAK, TCK), should be fitted with a temperature sensor to monitor and
register the temperature in the area of the magnetic coupling. Pumps are fitted with a threaded connection for this
purpose.
g) To prevent pumps running dry it is recommended to install, in the pump discharge line, a flow meter to check that there
is a constant liquid circulation in the piping.
h) Fitting of a power meter will help analyzing the operation of the pumps. Knowing the minimum and maximum power
absorbed by the operating pumps will help identifying problems that may be caused by dry running, siphoning, etc.
i) Accelerometers fitted on the bearing housing near the bearings, will help with the reading of the vibrations. An analysis
of the vibration diagram, direct or indirect, would provide a diagnostic to prevent mechanical breakdowns, such as
hydraulic cavitation.
l) It is recommended to start the magnetic pumps and all other pumps with more than 4 KW motor drive, with Soft-
Starters or Delta-Star connections. Further information may be found in chapter 9 and in paragraph 19.1 of chapter
19.
LEGEND for figures 9-10-11-12
d1.1 Threaded connection - “double tandem” mechanical seal flushing inlet from outside
d1.2 Threaded connection - “double tandem” mechanical seal flushing outlet
d2.1 Threaded connection - mechanical seal chamber cooling/heating liquid inlet
d2.2 Threaded connection - mechanical seal chamber cooling/heating liquid outlet
d3.1 Threaded connection - flushing liquid inlet from outside for “double back to back” mechanical seal or for single
mechanical seal construction
d3.2 Threaded connection - “double back to back” mechanical seal flushing liquid outlet
d4.1 Threaded connection - casing cooling/heating chamber liquid inlet
d4.2 Threaded connection - casing cooling/heating chamber liquid outlet
d5 Plugged connection - for manometer
d6 Plugged connection - for pump casing drain
d7.1 Threaded connection - packing seal flushing liquid inlet from outside
d7.2 Threaded connection - packing seal flushing liquid outlet from outside
d8 Threaded connection - for seal leakages recovery
d9 Plugged connection - bearings oil drain from housing (on request only)
d10 Plug with dipstick for bearings oil filling into housing
d11 Constant level oil filler (on request only) or Oil level gauge (standard)
d12 Threaded connection - mechanical seal flushing liquid inlet from outside (on request only)
d13 Grease nipple
d14 Plugged connection - air-hole mechanical seal chamber
d15 Plugged connection - sludge discharge from mechanical seal chamber (only for TCD/2-SP)
d16 Threaded connection - inlet oil flushing from the tank (only for TCD/2-SP)
d17 Threaded connection - outlet oil flushing to the tank (only for TCD/2-SP)
d18 Threaded connection - to check oil leaks from bearing (only for TCD/2-SP)
d19 Threaded connection - thermometric probe
d20 Plugged connection - filling
d21.1 Threaded connection – “Quench” liquid inlet
d21.2 Threaded connection – “Quench” liquid outlet
Plugged connection = Plug to be removed in case of use
Threaded connection = Before connecting remove the plastic protection plug
For each pump specific connections dimension please consult our website "www.pompetravaini.it".

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 15
Fig. 9 - CONNECTIONS AND HOOK-UPS FOR FLUSHING
Pumps series MC... - TC...
Standard connections and hook-ups
Pumps series MC... - TC...
Connections for designs /C - /R - /RR - /R2 - /B
Pumps series MC... - TC...
Connections for designs /T - /U2
(* = Where provided only)
d2.2
d2.1
d4.1
d4.2
d4.1
d6 *

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
16
Fig. 10A - CONNECTIONS AND HOOK-UPS FOR FLUSHING
Pumps series TCD
Standard hook-ups and connections - (* Only for TCD/2-SP)
Pumps series MCU-CH n.s. group 3 and 4
Standard hook-ups and connections
Pumps series TCH and TCN group 5
Standard hook-ups and connections for Double back to back mechanical Seals

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 17
Fig. 10B - CONNECTIONS AND HOOK-UPS FOR FLUSHING
Pump series TCK
Standard connections and hook-ups
NOTE: d19 = on both side for gr. 2
Pump series MCM
Standard connections and hook-ups
Pumps series TBH/C - TBH/KC - AT/KC - TBA/C
Standard hook-ups and connections
Pumps series TBH/CT - AT/CT
Connections for cooling or heating

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
18
Fig. 11A - CONNECTIONS AND HOOK-UPS FOR FLUSHING
Pumps series TBH/KC-2T - AT/KC-2T
Connections for mechanical seals flushing, cooling or heating
Pumps series TBA/C-2T
Connections for mechanical seals flushing, cooling or heating
Pump series TBK
Standard connections and hook-ups
Pump series TBAK
Standard connections and hook-ups

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA 19
Fig. 11B - CONNECTIONS AND HOOK-UPS FOR FLUSHING
Pumps series TMA 31 and 32/C and /R
Standard hook-ups and connections
Pumps series TMA 31 and 32/T
Connections for cooling or heating
Pumps series TMA 40 and 50/B - /R - /R2
Connections for mechanical seals flushing, cooling or heating

Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
20
Fig. 12 - CONNECTIONS AND HOOK-UPS FOR FLUSHING
Pumps series MC… - TC…
(API Plan 11) Recycle directly from pump casing or via
cooling
Pumps series MC… - TC…
Single or Double mechanical seal flushing with Seal Tank
Pumps series TCD/SP
Mechanical seal flushing with Seal Tank