Travaini Pumps USA TRH Series Installation and operation manual

200 NEWSOME DRIVE
YORKTOWN, VA 23692
Telephone: [phone]
Toll Free: 800.535.4243
Web Site: www.travaini.com Fax: [phone]
Continuing research of TRAVAINI PUMPS USA results in product improvements; therefore any specifications may be subject to change without notice.
PRINTED IN USA
F:/MVUOTGB4
DATE 4/02
Operating &
Maintenance
Manual
forLiquid Ring
Vacuum Pumps,
Compressors
& Systems
TRH-TRS-TRM-TRV-SA
Water Sealed & Oil Sealed (DynaSealTM)
Systems
Liquid Ring & Rotary Vane Vacuum Pumps and Systems
Liquid Ring & Rotary Vane Vacuum Pumps and Systems

OUR PRODUCTS
LIQUID RING
VACUUM PUMPS
LIQUID RING COMPRESSORS
ROTARY VANE VACUUM PUMPS
ROTARY VANE VACUUM SYSTEMS
MEDICAL SYSTEMS (NFPA99)
PACKAGE VACUUM SYSTEMS
WITH PARTIAL OR TOTAL
SERVICE RECIRCULATION
CUSTOM ENGINEERED
VACUUM SOLUTIONS
This manual applies to TRAVAINI PUMPS USA
liquid ring pumps single stage series TRM, TRS,
TRV, double stage series TRH, compressors
series SA and systems series water sealed and
oil sealed (DynaSealTM) Systems, which utilize
above pump series. (Please see section 18 or 19
for details pertaining to systems).
NOTE: Unless otherwise specified, the term
pump used throughout this manual means also
pump/motor assembly or system type water
sealed or oil sealed (DynaSealTM).
MANUFACTURER:
TRAVAINI PUMPS USA
200 Newsome Drive
Yorktown, VA 23692
Telephone: [phone]
Fax: [phone]
Website: www.travaini.com
WARRANTY:
All products manufactured by TRAVAINI PUMPS
USA are guaranteed to meet the conditions
listed on the general terms & conditions of sales
and/or conditions listed on the order confirma-
tions. Failure to strictly adhere to the instructions
and recommendations listed in this manual, will
void the manufacturer’s warranty. Detailed
warranty policy can be found in Section 21.
PROPRIETY DOCUMENT:
This document and the information enclosed
herein are proprietary to Travaini Pumps USA and
must, along with any copies, be returned upon
demand. Reproduction or use of any information
disclosed herein, or the manufacture of any
assembly or part depicted herein is permissible
only to the extent expressly authorized in writing
by Travaini Pumps USA on and for which this
document is provided.
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 and/or system. Should you find
errors, misunderstandings or discrepancies please do not
hesitate to bring them to our attention.
OPERATING
MANUAL FOR
INSTALLATION,
START-UP AND
MAINTENANCE
FOR LIQUID
RING VACUUM
PUMPS,
COMPRESSORS
AND SYSTEMS
“Proven Designs”
Liquid Ring & Rotary Vane Vacuum Pumps and Systems

SECTION PAGE
9.9 Typical installation schematics for vacuum pumps ............... 18
9.10 Typical installation schematics for compressors .................. 19
9.11 Connections location.......................................................... 20
9.12 Pump engineering data....................................................... 23
10 Check list prior to start-up............................................................. 25
11 Starting, operating and stopping procedures .................................. 25
11.1 Start-up of “WATER SEALED” system .................................. 26
11.2 Operation of “WATER SEALED” system ................................ 26
11.3 Shut down of “WATER SEALED” system............................... 27
11.4 Start-up of “OIL SEALED (DynaSeal™)” systems .................. 27
11.5 Operation of “OIL SEALED (DynaSeal™)” systems................ 27
11.6 Shut down of “OILSEALED (DynaSeal™)” systems................ 28
12 Operating maintenance ................................................................. 28
12.1 “OIL SEALED (DynaSeal™)” systems ................................... 29
13 Bearings and mechanical seals maintenance ................................. 30
13.1 Bearings............................................................................ 31
13.2 Mechanical seals............................................................... 31
14 Trouble shooting: problems, causes and solutions.......................... 33
15 Repairing and removing pump from the installation......................... 34
16 Spare parts.................................................................................. 35
17 Engineering data........................................................................... 36
17.1 Influence of service liquid temperature, specific gravity ........ 36
and viscosity on pump performance
17.2 Service liquid temperature change across the pump ............ 37
17.3 Operation with partial recovery of service liquid................... 38
17.4 Units conversion table........................................................ 39
18 Engineering data for “WATER SEALED” systems.............................. 40
19 Engineering data for “OIL SEALED (DynaSeal™)” systems ............... 42
20 Product Data Information Form ...................................................... 44
21 Warranty Policies - Vacuum Pumps, Compressors and Systems ....... 45
TABLE OF CONTENTS
SECTION PAGE
1General instructions...................................................................... 1
2Safety instructions........................................................................ 1
3In case of emergency.................................................................... 2
3.1 Basic first aid .................................................................... 2
4Pump outlines .............................................................................. 3
4.1 Principle of operation ......................................................... 3
4.2 Service liquid properties .................................................... 3
4.3 Pump models and tables for material of construction........... 3
5Uncrating, lifting and moving instructions ....................................... 4
6Storage instructions...................................................................... 7
7Mounting and alignment instructions.............................................. 7
7.1 Assembly of base mounted pump unit................................. 7
7.2 Alignment procedures for monoblock and for ....................... 8
pump/motor assembly on baseplate
7.3 Alignment instructions........................................................ 8
8Electrical connections ................................................................... 11
9Installation instructions................................................................. 12
9.1 Piping connections............................................................. 13
9.2 Accessories....................................................................... 13
9.3 Installation schematics for vacuum pumps .......................... 14
9.3.1 Service liquid: Once-through system (no recovery) ............... 14
9.3.2 Service liquid: Partial recovery system................................ 14
9.3.3 Service liquid: Total recovery system .................................. 14
9.4 Installation schematics for compressors ............................. 15
9.5 Installation of “WATER SEALED” systems ............................ 15
9.6 Installation of “OIL SEALED (DynaSeal™)” systems.............. 15
9.7 Service liquid (H2O at 60° F) flow (in ACFM) for .................... 16
vacuum pumps
9.8 Service liquid flow (H2O at 60° F) and pressure for .............. 17
compressors series “SA”
General maintenance schedule......................46

When approaching the pump ALWAYS be properly dressed (avoid use of
clothing 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.
•ALWAYS stop the pump prior to touching it, regardless of the reason.
•ALWAYS disconnect the power to the motor prior to working or removing the
pump from the installation.
•NEVER work on the pump when it is hot.
•After completion of the work ALWAYS re-install the safety guards previously
removed.
•ALWAYS be careful when handling pumps that convey acids or hazardous
fluids.
•ALWAYS has a fire extinguisher in the vicinity of the pump installation.
•DO NOT operate the pump in the wrong direction of rotation.
•NEVER put hands or fingers in the pump or system openings or cavities.
•NEVER step on pump and/or piping connected to the pump.
•Pump or piping (connected to the pump) must NEVER be under pressure or
vacuum when maintenance or repair is carried out.
NOTE: There are materials in the pump that may be hazardous to people suffering
from allergies. Maintenance and operating personnel should consult Table 1 for
such materials.
TABLE 1
MATERIAL USE POSSIBLE DANGER
Oil and Grease General lubrication, ball Skin and eye irritation
or roller bearings
Plastic and elastomer O-Ring, V-Ring, Splash ring, Release of fumes and
components Oil seals vapours when overheated
Teflon & Kevlar fibers Packing rings Release of dangerous
powders, release of
fumes when overheated
Varnishes Exterior pump surface Release of powder and
fumes in case of rework,
flammable
Protective liquid Pump inside surface Skin and eye rash
Liquid compound Gasket between flat surfaces Skin, eye and breathing
organs irritation
3 - IN CASE OF EMERGENCY
Should the pump break down leak gas and/or service liquid, immediately discon-
nect the electrical power following the instructions given in section 11. Alert the
maintenance personnel, at least two people should intervene using precautions,
as it is required for the specific installation: pump may be handling dangerous
and/or hazardous fluids.
After correction of all the problems that created the emergency situation, it is
necessary to carry out all the recommended starting procedures (see section 10).
3.1 - BASIC FIRST AID
In the event dangerous substances have been inhaled and/or have come in
contact with the human body, immediately contact the medical staff and follow the
instructions given by the company’s internal medical safety procedures.
– 2 –– 1 –
1 – GENERAL INSTRUCTIONS
This manual is intended to provide reference to:
-application and operating safety
-installation and maintenance for pump or system
-starting, operating and stopping procedures for pump or system
NOTE: All references made to pumps are also applicable to systems that employ
these pumps, unless otherwise specified.
Upon receipt of this manual, the operator should complete the Product Data sheet
with the requested data. The manual should then be read CAREFULLY and kept in
a safe file for future reference. It should always be available to the qualified oper-
ating and maintenance personnel responsible for the safe operation of the pump
or system. (Qualified personnel should be experienced and knowledgeable of
Safety Standards, should be recognized by the safety department manager as
being capable to effectively act on safety issues, should the need arise and knowl-
edge of first aid should also be required).
The pump is to be used only for the applications specified on the
confirming order for which TRAVAINI PUMPS USA has selected the
design, materials of construction and tested the pump to meet the
order specifications. Therefore, the pump or system CANNOT be
used for applications other than those specified on the order
confirmation.
In the event the pump is to be used for different applications, please consult
TRAVAINI PUMPS USA or a representative of the manufacturer. TRAVAINI PUMPS
USA declines to assume any responsibility if the pump is used for different
applications without prior written consent. The user is responsible for the verifi-
cation of the ambient conditions where the pump will be stored or installed.
Extreme low or high temperatures may severely damage the pump or system
unless proper precautions are taken. TRAVAINI PUMPS USA does not guarantee
repairs or alterations done by user or other unauthorized personnel. Special
designs and constructions may vary from the information given in this manual.
Please contact TRAVAINI PUMPS USA should you have any difficulty or doubt.
NOTE: Drawings appearing in this manual are only schematics. These drawings are
not for construction.
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.
•Electrical connections on the motor or accessories must ALWAYS be carried
out by authorized personnel and in accordance to the local codes.
•Any work on the pump should be carried out by at least 2 people.

4.3 - PUMP MODELS AND TABLES FOR MATERIAL OF CONSTRUCTION
On the pump nameplate are printed the pump serial number, the year of manu-
facture and the pump model. Refer to the following example for understanding the
coding of the pump model. Every letter or number in the pump model designation
has a specific meaning relating to the pump design.
Example of pump model number:
T R H C 80 - 750 / C - M / GH
STANDARD materials of construction
VDMA Description GH F RZ RA A3
106 Suction casing
107 Discharge casing Cast iron 1561
137 Intermediate plate
110 Center body Carbon Steel
210 Shaft Stainless steel AISI 420 Stainless steel
AISI 316
147 Manifold Carbon steel
357 Bearings & M.S. Hous. Cast iron 1561
230 Impeller Ductile
Bronze iron Stainless steel AISI 316
For additional details regarding standard or special materials contact TRAVAINI
PUMPS USA.
5 - UNCRATING, LIFTING AND
MOVING INSTRUCTIONS
Upon receipt, verify that the material received is in exact compliance with that
listed on the packing slip.
When uncrating, follow the instructions listed below:
•check for visible damages on the crate that could have occurred during
transport
•carefully remove the packaging material
•check the pump/or accessories such as tanks, piping, valves, etc. to
ensure that it is free of visible markings such as dents and damage which
may have occurred during transportation
•in the event of damage, report this immediately to the transport company
and to TRAVAINI PUMPS USA Customer Service department.
Discard through controlled disposals all packaging materials that may constitute
personal injury (sharp objects, nails, etc.).
– 4 –
4 - PUMP OUTLINES
The instructions given in this manual are for liquid ring vacuum pumps and com-
pressors and for systems type WATER SEALED or OIL SEALED (DynaSealTM) which
utilize said pumps.
NOTE: Capacities, vacuum and pressures are nominal and are the maximum
attainable values under standard operating conditions. Please contact TRAVAINI
PUMPS USA for data on liquid ring compressors series TR…
TRM Single stage liquid ring vacuum pumps
Capacity to 210 ACFM, max vacuum 33 mbar (25 Torr)
TRS Single stage liquid ring vacuum pumps
Capacity to 2100 ACFM, max vacuum 150 mbar
(100 Torr)
TRV Single stage vacuum pumps
Capacity to 300 ACFM, max vacuum 33 mbar (25 Torr)
TRH Two stage liquid ring vacuum pumps
Capacity to 2100 ACFM, max vacuum 33 mbar
(25 Torr)
SA Double acting liquid ring compressors
Capacity to 110 ACFM, pressures to 10 bar–(145 psig)
4.1 - PRINCIPLE OF OPERATION
(See figure at side)
The aspirated gas enters the pump chamber A-B
via the pump suction flange. The gas is trapped
between two (2) impeller vanes. The impeller
rotates eccentrically in relation to the centerline of
the liquid ring that, by centrifugal force, assumes
the shape of the impeller casing. The progressive
change of volume between the two (2) vanes, the
impeller hub and the liquid ring first creates a
vacuum and then a compression of the gas in the
B-C area till the gas is discharged, together with a
portion of the liquid, through the discharge port
C-D. The lost liquid must then be replenished.
4.2 - SERVICE LIQUID PROPERTIES
For good operation, the liquid ring pumps must be supplied with a service liquid,
which is clean, non-abrasive and free of any solids. The ser vice liquid tempera-
ture should not exceed 80 °C and the gas handled should be maximum 100 °C;
the liquid density should be between 0.8 and 1.2 g/cm3 and the viscosity should
be less than 40 °C (the pump performance will change if the service liquid has
properties different than those of water at 15°C (60°F). All engineering data is
based on the use of 15°C (60°F) as service liquid, see section 17 for additional
information. Contact TRAVAINI PUMPS USA before using liquids with properties
outside the ranges listed above.
– 3 –
T–Manufacturer POMPETRAVAINI
R–Liquid ring pump
H–Mand V = Single stage pump
with high vacuum
S = Single stage pump with
medium vacuum
H = Two stage pump with high
vacuum
C–Revision of hydraulic design
80 –ØFlange size (mm)
750 –Nominal capacity in m3/h
C–C=Shaft sealing by mechanical
seal
B = Shaft sealing by stuffing box
M–Monoblock design with motor
flange (upon request)
GH –Material of construction
GH - F - RZ - RA - A3
(see following table)

– 6 –
The pump or assembly must ALWAYS be moved and transported in the horizontal
position. Prior to moving the unit find the following:
•total weight
•center of gravity
•maximum outside dimensions
•lifting points location.
For safe lifting to prevent material damages and/or personal injuries
is recommended to use ropes, or belts properly positioned on the
pump and/or lifting eyebolts and make correct movements.
NOTE: Lifting eyebolts fitted on single components of the assembly
(pump or motor) should not be used to lift the total assembly.
Avoid lifts whereby the ropes or straps, form a triangle with the top angle over 90°
(see fig. 3). The fig. 4 shows several additional examples of lifting to be avoided.
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.
For instructions to remove the unit from installation see section 15.
– 5 –
OK
NO

Flexible couplings must be properly aligned. Bad alignments will result in coupling
failures and damage to pump and motor bearings.
Assembly instructions for MONOBLOCK design are listed on paragraph 7.3 steps
1, 2, 4, 5, 6.
Assembly instructions for PUMP-MOTOR ON BASEPLATE are listed on paragraph
7.3 steps 7, 1, 8, 5, 9, 10, 11.
For pump driven with V-Belt, please consult TRAVAINI PUMPS USA for further
information.
7.2 - ALIGNMENT PROCEDURES FOR MONOBLOCK AND FOR PUMP/MOTOR
ASSEMBLY ON BASEPLATE.
TRAVAINI PUMPS USA prior to shipment properly aligns the pump/motor assembly.
It is however required to verify the alignment prior to the start-up. Misalignment
can occur during handling, transportation, grouting of assembly, etc.
For alignment procedures of MONOBLOCK design see paragraph 7.3 steps 3, 4,
5, 6.
For alignment procedure of BASEPLATE design see paragraph 7.3 steps 7, 5, 9,
10, 11.
NOTE: Coupling sizes and permissible coupling tolerances listed in this manual
are applicable to the particular coupling brand installed by TRAVAINI PUMPS USA
as a standard. For sizes and tolerances of other type of couplings, follow the
instructions given by their respective manufacturer.
7.3 - ALIGNMENT INSTRUCTIONS
NOTE: Alignment should be done at ambient temperature, with power to the
motor disconnected and following the safety procedures to avoid accidental start-
ing (see section 2).
Should the pump operate at high temperatures that could upset the coupling align-
ment, it is necessary to check the alignment to secure proper working operation
at such operating temperatures. It is recommended the use of proper hand pro-
tections such as gloves, when carrying out the operations listed below (schemat-
ics for various assemblies are shown).
NOTE: The following points must be followed with the sequence stated above and
depending upon the type of operation: alignment assembly or alignment verifica-
tion.
1- Thoroughly clean motor/pump shaft ends and shaft keys, place the shaft keys
in the proper key way slots and fit the coupling halves in line with the shaft ends.
The use of rubber hammers and even pre-heating of the metal half couplings may
be required (see fig. 5). Lightly tighten the set screws. Verify that both pump and
motor shafts rotate freely.
– 8 –
6 - STORAGE INSTRUCTIONS
After receipt and inspection, if not immediately installed, the unit must be repack-
aged and stored. For a proper storage proceed as follows:
•store the pump in a location that is closed, clean, dry and free of vibrations
•do not store in areas with less than 5 °C (41 °F) temperature (for lower
temperature it is necessary to completely drain the pump of any liquids that
are subject to freezing)
FREEZING DANGER!
Where the ambient temperature is less than 5 °C (41°F) it is
recommended to drain the pump, piping, separator, heat exchanger,
etc. or add an anti-freeze solution to prevent damage to the
equipment.
•fill the pump halfway with an anti-rust liquid but compatible with gaskets and
elastomers materials, rotate the pump shaft by hand so that all internal parts
get wet and then drain the pump of the excessive anti-rust liquid
•plug all openings that connect the pump internals to the atmosphere
•protect all machined 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
which may result in seizing of the pump.
•pump accessories should be subjected to similar procedure.
7 - MOUNTING AND ALIGNMENT INSTRUCTIONS
7.1 - ASSEMBLY OF BASE MOUNTED PUMP UNIT
In some cases such as bare pump orders, pumps are shipped with
anti-rust and anti-freeze agents. Ensure pump is thoroughly flushed
and these agents are removed prior to installation.
If the pump has been purchased with a free shaft end, a proper baseplate is
required to mount the pump/motor assembly. The baseplate must be properly
designed for maximum rigidity to prevent vibrations and distortions. It is recom-
mended the use of a fabricated baseplate manufactured with rigid “U” shaped
channel (fig. 16 illustrates an example).
When the pump has been purchased without the electric motor, it is then required
to select the proper motor before proceeding to the installation of the unit. When
selecting a motor the following must be considered:
•maximum power absorbed by the pump over the total operating range
•pump operating speed (RPM)
•available power (Hertz, voltage, etc.)
•motor enclosure type (ODP, TEFC, EX.PR., etc.)
•motor mount (B3, B5, horizontal, vertical, C-flange, D-flange, etc.).
When selecting Flexible couplings the following must be considered:
•nominal motor horsepower
•motor operating speed
•coupling guard must meet safety standards as dictated by OSHA, etc.
– 7 –

8- Place the electric motor on the baseplate and bring the two coupling halves
together with approx. 2mm gap between them keeping the motor axially aligned
with the pump shaft. In the event the two shaft heights do not align, proper shim-
ming under the pump or motor feet will be required. Mark the motor and/or pump
anchoring bolt holes. Remove motor and/or pump, drill and tap the holes, clean
and mount pump and/or motor in place and lightly tighten the bolts (see fig. 11).
9-With a straight edge ruler check the parallelism of the two coupling halves at
several points, 90° from each other (see fig. 13).
NOTE: Easier and more accurate readings can be attained with instruments such
as Dial Indicators (if readily available).
If the maximum
value of “X” is
higher than that
listed in the table
2 (for the given
coupling size) it
will be required to
correct the align-
ment by using shims under the pump or motor feet. When the measured values
fall within the tolerances (tolerances only given for “S”), the pump and motor
mounting bolts can be tightened.
– 10 –
2- Insert the perforated metal sheet coupling
guard inside the lantern so that the coupling
is accessible from one of the lateral open-
ings. Couple the electric motor to the pump
lantern engaging the two coupling halves,
hands may reach the coupling halves through
the lateral opening (see fig. 7) tighten the
assembly with bolts supplied with the unit
and install the supporting foot, when applica-
ble (see fig. 6).
3- Applying slight hand pressure to the cou-
pling guard, rotate it so that one opening of
the lantern is accessible (see fig. 8).
4- Rotate by hand the coupling through the lateral opening of the lantern to make
sure the pump is free.
5- With a feeler gauge, check the distance between the two coupling halves. The
gap value “S” should be as listed on table 2 or as given by the coupling manu-
facturer. In the event, an adjustment is necessary, loosen the set screws on the
coupling half and with a screw driver move the coupling half to attain the gap “S”
(see fig. 12). Then tighten the set screw and rotate the rotor by hand to make
sure, once more, that there is no obstruction.
6- Rotate back the coupling guard by hand through the two openings of the lantern
so that both openings are completely covered. This will complete the alignment
verification of the MONOBLOCK design.
7- Remove the coupling guard and its extension (if there is one) attached to the
pump, by removing the two locking screws (see fig. 9 and 10).
– 9 –

start, to avoid electrical overloads to the motor and mechanical overloads to the
pump. Be sure to replace all safety guards before switching on the electrical
power. If possible check the direction of rotation before the motor is coupled to
the pump but protect the motor shaft to prevent any accidents. When this is not
possible briefly jog the pump to check its direction of rotation (see arrow on pump
for correct rotation). If the direction must be changed two of the three electrical
wire leads must be alternated with each other (at the terminal box or at the motor
starter). Be aware that rotation in the wrong direction and/or pump running dry
may cause severe pump damage. Electrical instrumentation such as solenoid
valves, level switches, temperature switches, etc. which are supplied with the
pump or systems must be connected and handled in accordance with the instruc-
tions supplied by their respective manufacturers. Contact TRAVAINI PUMPS USA
for specific details.
9 - INSTALLATION INSTRUCTIONS
Information to determine the piping sizes and floor space requirements can be
obtained from dimensional drawings and other engineering data. The information
required is:
•size and location of suction and discharge flanges
•size and location of service liquid connection and connections for cooling,
heating, flushing, 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 sections 9.2 to 9.8. Proper lifting
devices should be available for installation and repair operations. Pump assem-
bly 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 and air-cooled radiator, if applicable. Avoid installing the unit in hidden loca-
tions, dusty and lacking of ventilation. Select a mounting pad that will minimize
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 foun-
dations (see fig. 16).
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.
– 12 –
10 - Angular misalignment can be measured with a
Caliper. Measure the outside coupling dimension at sev-
eral points (see fig. 14). Find the minimum and maxi-
mum width of the coupling, the difference between
these two readings “Y” (Y1-Y2) should not exceed the
value listed in table 2 for the given coupling size.
Should this value be greater it will be necessary to cor-
rect the alignment by shimming the pump and/or motor.
Following this operation it is recommended to check
once more the value “X” to make sure that both values
are within the allowed tolerance (see point 9). Make
sure that both set screws on the coupling halves are properly secured.
Table 2
COUPLING GAP PARALLEL ANGULAR
“Ø A” mm “S” mm “X” mm “Y” mm
60 2 to 2.50 0.10 0.20
80 2 to 2.50 0.10 0.20
100 2 to 2.50 0.15 0.25
130 2 to 2.50 0.15 0.25
150 3 to 3.75 0.15 0.30
180 3 to 3.75 0.15 0.30
200 3 to 3.75 0.15 0.30
11 -Install the coupling
guard and its extension (if
applicable) on the pump,
secure the two locking
bolts. The gap between
motor frame and the guard
should not be greater than 2
to 3mm (see fig. 15).
8 - ELECTRICAL CONNECTIONS
Electrical connections must be made exclusively by qualified
personnel in accordance with the instructions from the manufacturer
of the motor or other electrical components and must adhere to the
local National Electrical Code.
FOLLOW ALL SAFETY PRECAUTIONS AS LISTED IN SECTION 2.
BEFORE DOING ANY WORK TO THE INSTALLATION, DISCONNECT
ALL POWER SUPPLIES.
It is recommended that electric motors be protected against overloading by means
of circuit breakers and/or fuses. Circuit breakers and fuses must be sized in
accordance with the full load amperage appearing on the motor nameplate. It is
advisable to have an electrical switch near the pump for emergency situations.
Prior to connecting the electrical wiring, turn the pump shaft by hand to make sure
that it rotates freely. Connect the electrical wiring in accordance with local electri-
cal codes and be sure to ground the motor. Motor connection should be as indi-
cated on the motor tag (frequency and voltage) and as discussed in the motor
instruction manual. It is recommended that motors over 75Hp be wired for soft
– 11 –

Heat exchanger
It cools the service liquid for those systems with total liquid recovery: it can be
plate and frame, shell and tube or radiator type, depending upon the application.
Filter
Required to stop solids from entering the pump suction. Sizing of the filter is very
important as it could create excessive pressure drops, which would affect the
pump performance.
9.3 - INSTALLATION SCHEMATICS FOR LIQUID RING VACUUM PUMPS
The working principle of the vacuum pump requires a continuous flow of fresh and
clean liquid that enters the pump at the service liquid connection identified by the
letter Z(see section 9.11). The liquid is discharged together with the handled gas
through the pump discharge flange. The quantity of said liquid will vary with pump
size and degree of working vacuum (see performance curves and/or table 3). The
service liquid absorbs the compression heat generated by the pump compression,
which results in a temperature rise of the service liquid (for additional information,
see chapter 17). There are three basic installation schematics listed below that
may be considered, depending upon the quantity of service liquid that is desired
and possible to be recycled.
9.3.1 - Service liquid: Once-through system (no recovery)
All the service liquid is supplied from an external source. The liquid is separated
from the incoming gas in the discharge separator and is completely drained. This
is a popular installation and is used where there is an abundant supply of fresh
liquid and/or there is no contamination of the same. The service liquid should be
supplied at the pump connection with a pressure of 5.8psig maximum to avoid
flooding the pump with too much liquid. If this is not possible it is recommended
to install a reservoir fitted with a float valve, this tank is supplied with the liquid
that is then pulled by the pump as required by the operating conditions. The liq-
uid level in the reservoir should be approximately at the pump shaft centerline.
Schematic fig. 17 illustrates the once-through system.
9.3.2 - Service liquid: Partial recovery system
This type of installation is used where it is desired to minimize the use of fresh
service liquid (for calculations see section 17). The service liquid enters and
leaves the pump same as the once through system, however part of the liquid is
recycled from the discharge separator and the balance is continuously supplied
from an external source. The excessive liquid is drained through the separator
overflow connection. The temperature of the mixed liquid supplied to the pump
will be higher than the temperature of the make-up liquid. Its final temperature will
depend upon the amount of the recycled liquid. It is important to remember that
with higher service liquid temperature the pump performance will decrease (see
section 17) with the possibility of operating the pump in the cavitation area. When
the separator/reservoir is installed along side of the pump, its liquid level should
not be above the pump shaft centerline. When flanged separators are mounted on
the pump discharge flange, the liquid level is automatically maintained by the loca-
tion of the connections. Schematic fig. 18 illustrates the system with partial recov-
ery of the service liquid.
9.3.3 - Service liquid: Total recovery system
This system has total recycle of the service liquid without fresh liquid make-up
from an outside source. A heat exchanger is required to lower and control the tem-
perature of the recycled service liquid: for sizing and calculations of heat loads
– 14 –
9.1 - PIPING CONNECTIONS
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 and discharge flanges, the service liquid line and all other service
connections (see fig. 17 to 26).
BE SURE TO PIPE THE CORRECT CONNECTION FROM THE
INSTALLATION TO THE RESPECTIVE PUMP CONNECTION!
To prevent foreign matters from entering the pump during installation, do not
remove protection cap from flanges or cover from openings until the piping is
ready for hook-up. Verify that all foreign objects such as welding bits, bolts, nuts,
rags and dirt are removed from piping, separators, etc. before these are connect-
ed to the pump. Flanges should be connected parallel with each other, without
stress and with bolt holes lined up. The flange gaskets should not interfere with
the inside diameter of piping and/or flange. All piping must be independently sup-
ported, easily located and must not transmit forces or torque to the pump due to
the weight or to thermal expansions. Piping size must never be less than the
respective connection on the pump. Suction and discharge flanges are vertical
and identified with arrows. To minimize friction losses and back-pressures, the
discharge piping should be one size larger than the pump connection size. To
avoid back-pressure and possibility of flooding the pump when it stops, it is rec-
ommended to limit the rise of the discharge piping to approximately 2 feet above
the pump discharge flange. Upon completion, piping and connections should be
tested for leakage under vacuum.
9.2 - ACCESSORIES
Listed below are common accessories that may be supplied with the pump or
added at a later date. See fig. 17 to 26 for locations and connection sizes on the
pumps.
Non return valve, (check valve)
Prevent back-flow of gas and liquid in the suction piping and/or discharge piping
when the pump stops. Is installed on the pump suction flange in the case of vac-
uum service or on the pump discharge flange in the case of compressor service.
Vacuum relief valve
It is used to protect the pump from cavitation or to regulate the suction minimum
pressure (or max vacuum).
When the pump capacity exceeds the system load at a given vacuum, the relief
valve opens letting in atmospheric air or gas (if connected to the discharge sepa-
rator) keeping constant the pre-set vacuum.
Automatic draining valve
It is used to drain the pump to the shaft centerline when the pump stops so to
prevent that the pump has excessive liquid for the next start-up. Starting the pump
full or with too much liquid could severely damage the pump and may cause exces-
sive Amp draw from the motor.
Vacuum gauge
It usually installed under the pump suction flange and will provide an indication of
the pump operating vacuum (pressure).
Discharge reservoir separator
It separates the service liquid from the gases at the pump discharge. It can be
mounted on the pump discharge flange or on the pump baseplate. It is required
when the system is with partial or total recovery of the service liquid.
– 13 –

ATTENTION:
HOT SURFACES, DO NOT TOUCH TO AVOID POSSIBLE BURNS!
During operation, the temperature of pump, frame, separator and piping can reach
values over 60 °C. Therefore, take all precautions necessary to comply with the
safety regulations.
9.7 - SERVICE LIQUID (H2O at 60 °F) FLOW (in GPM) FOR VACUUM PUMPS
The listed values are referred to the system with “Once-through” service liquid,
handling dry air at 20 °C (68 °F) (for more specific data see the pumps perform-
ance curve). To reduce the amount of service liquid flow read the information
given in section 17. If the pump is handling saturated or condensable gases at
relatively high temperatures, there will be condensation inside the pump. In those
cases the service liquid flow listed below can be increased up to 25% to reduce
the discharge temperature and minimize the danger of pump cavitation at high
vacuum.
Table 3
PUMP SUCTION PRESSURE (in Torr) PUMP SUCTION PRESSURE (in mbar)
MODEL 25-150 >150-450 >450 MODEL 150 - 450 > 450
TRH 32-4 0.9 0.9 0.7 TRS 32-20 1.5 1.0
TRH 32-20 1.5 1.3 1.2 TRS 32-50
TRH 32-45 TRS 40-55 3.4 1.9
TRH 32-60 TRS 40-80
TRH 40-110 4.0 3.0 2.6 TRS 40-100 4.2 2.5
TRH 40-140 TRS 40-150 5.1 3.2
TRH 40-190 4.4 3.7 3.0 TRS 50-220 10.6 5.7
TRH 50-280 10.5 7.5 4.0 TRS 100-550 12.8 7.7
TRH 50-340 13.0 9.8 5.3 TRS 100-700 14.5 9.2
TRH 50-420 15.8 12.0 7.0 TRS 100-980 40 24
TRH 80-600 11.0 8.7 5.7 TRS 125-1250 38 18
TRH 80-750 13.0 10.6 7.0 TRS 125-1550 44 20
TRH 100-870 TRS 200-1950 80 50
TRH 100-1260 32.5 25.0 16.7 TRS 200-2500 88 51
TRH 100-1600 TRS 200-3100 114 77
TRH 150-2000 53 42 26
TRH 150-2600 58 49 29
TRH 150-3100 16.20 14.10 8.70
PUMP SUCTION PRESSURE (in Torr)
MODEL 25-150 >150-450 >450
TRM 32-25 1.8 0.9 0.6
TRM 32-50 2.0 1.0 0.7
TRM 32-75 3.0 1.8 1.5
TRM/V 40-110 5.3 3.5 2.2
TRM/V 40-150 2.4
TRM/V 40-200 5.7 4.0 2.6
TRM/V 50-300 7.0 5.3 3.5
TRV 65-300
TRV 65-450 10.5 7.4 4.0
see section 17. A circulating pump will be required for those applications where
the vacuum pump operates for extended periods of times in the pressure ranges
above 20”Hg vacuum or when there are high pressure drops in the closed loop
including the heat exchanger (over approximately 30psi.). The liquid level in the
separator/reservoir should not be above the pump shaft centerline. Losses of liq-
uid from the closed loop must be compensated with an equal amount from an out-
side source. Schematic fig. 19 illustrates the system with total recovery of the
service liquid.
9.4 - INSTALLATION SCHEMATICS FOR LIQUID RING COMPRESSORS
The liquid ring vacuum pump can also operate as a compressor up to a maximum
differential pressure, depending upon the models, of about 30 psig. The com-
pressor series SA are specifically engineered to perform with differential pres-
sures of up to 150 psig, depending on models. The principle of operation is same
as given in previous paragraph (9.3 for vacuum pumps) and there are three pos-
sible types of installation: once-through service liquid, partial recover y ser vice liq-
uid and total recovery service liquid. The service liquid entering the compressor
connection should have a pressure of minimum 5psig. above the compressor
operating inlet pressure. A booster pump will be required if the service liquid is
available at lower pressures. Separator/reservoir is considered a pressure ves-
sel and as such it must be engineered and built to the applicable codes (ASME,
etc.). Accessories such as a pressure relief valve, check valve (non-return valve),
automatic float type drain valve (water trap), etc. are required in a compressor sys-
tem. Fig. 20, 21 and 22 illustrate the three possible types of installations.
9.5 - INSTALLATION OF “WATER SEALED” SYSTEMS
WATER SEALED systems are factory assembled and piped including discharge
separator/reservoir, heat exchanger (air/liquid or air/air), circulating pump, and
all required accessories mounted on a common compact baseplate/frame. See
section 18 for additional details. Installation of WATER SEALED system is similar
to that of a vacuum pump or a compressor with partial recover y or total recovery
of service liquid depending upon the application (see section 9.3 or 9.4). It is
important to properly engineer the connecting piping to the system suction and
discharge, cooling lines, flushing lines, and draining lines. The used heat
exchanger is designed with service liquid being cooled approximately 4 to 6°C (39
to 43 °F) over the available cooling media temperature. The cooling liquid flow is
approximately the same as the service liquid flow needed by the pump at the
operating conditions (see section 9.7 or 9.8). Schematics for once-through, par-
tial and total service liquid recovery are shown in fig. 18 - 19 - 21 - 22.
9.6 - INSTALLATION OF “OIL SEALED (DynaSeal™)” SYSTEMS
OIL SEALED (DynaSeal™) are factory packaged systems including liquid ring vacu-
um pump using oil for service liquid. For additional details see section 19.
Installation is simple and does not require additional details other than those
already discussed in the previous chapter. Suction and discharge piping should
be connected to the respective pump flanges. When locating the discharge pip-
ing it should be noted that although the system is fitted with oil demister, there
may still be traces of oil fumes carried by the vented gas. Make sure therefore,
that the selected area for vacuum pump discharge is suitable for such purpose.
All other connections, (heat exchanger, draining, etc.) must be properly done. See
fig. 37 for location of connections.
– 15 –
For the above pumps running as compressors without the specific performance
curves, please contact TRAVAINI PUMPS USA.
– 16 –

9.9 - TYPICAL INSTALLATION SCHEMATICS FOR VACUUM PUMPS
1Separator/
reservoir
2Non-return valve
3Shut-off valve
(check valve)
4Liquid ring
vacuum pump
5Solenoid valve
6Electric motor
7Level gauge
glass
8Float valve
9Heat exchanger
10 Make-up
solenoid valve
11 Drain valve
13 Flow control
valve
13A By-pass valve
14 Pressure
gauge
15 Level switch
16 Filter (y-strainer)
18 Automatic drain
valve
(check valve)
– 18 –
9.8 - SERVICE LIQUID FLOW (H2O at 60°F) AND PRESSURE FOR
COMPRESSORS SERIES “SA”
Values are applicable when the compressor suction is barometric pressure (1013
mbar) and the gas is air at 20°C (68 °F). The indicated flow and pressure require-
ments are valid for the compressor total performance curve.
SA0E3U = 4 GPM at minimum pressure of 20 to 40psi.
SA0G2D = 4 GPM at minimum pressure of 20 to 40psi.
SA0G2G = 6 GPM at minimum pressure of 20 to 40psi.
– 17 –

9.11 - CONNECTIONS LOCATION
– 20 –
9.10 - TYPICAL INSTALLATION SCHEMATICS FOR COMPRESSORS
19 Valve for
spare vacuum
connection
20 Vacuum gauge
21 Anti-cavitation
valve
22 Circulating
pump
23 Pressure relief
valve
24 Overflow valve
25 Draining
solenoid valve
26 Solenoid valve
for heat
exchanger
cooling liquid
27 Temperature
gauge
28 Fill connection
32 By-pass piping
38 Orifice flow
48 Automatic drain
valve or water
trap
Air or Gas
Liquid-Gas
mixture
Liquid
– 19 –

Table 6 - Pump series TRS
PUMP MODEL D Z Qty.
Location Connection Size Location Connection Size Manifolds
TRSE 32 8 3/8” GAS
TRSC 32 - - 4 -
TRSE 40-55 to 150 3/4” GAS
TRSC 40-55 to 100 491/2” GAS
TRSC 40-150 1/2” GAS 1
TRSE 50-220 3 3/4” GAS
TRSC 50-220 1/2” GAS
TRSB & TRSC 100 4 9 - 10 1 1/4” GAS 2
TRSE 125 1” GAS 1 1/2” GAS
TRSA 200 4 - 5 2 1/2” GAS
Table 7 - Pump series SA
COMPRESSOR MODEL Connection Size
SZ
SA0E3U 3/8” GAS
SA0G2D 1/4” GAS 1/2” GAS
SA0G2G
GAS = Straight pipe thread
A=Connection anti-cavitation
D=Auxiliar y connection for automatic draining valve,
connection valve for spare vacuum pick-up, vacuum relief valve
S=Connection for drain plugs or valves
V=Connection for vacuum gauge 1/4” GAS (series 32 excluded)
Z=Connection for service liquid
All drawings are general and schematics (for additional details see the specific
pump catalogue).
– 22 –
Table 4 – Pump series TRH
PUMP MODEL
ADZQty.
ManifoldsLocation Connection Location Connection Location Connection
Size Size Size
TRHE 32-4 - - - - 7 1/4” GAS
TRHE 32-20 & 45 8 3/8” GAS -
TRHC 32-20 & 45 1 4
TRHE & TRHC 32-60 1/2” GAS 1
TRHE 40-110 1/4” GAS 3/4” GAS -
TRHC 40-110 241/2” GAS
TRHE 40-140 & 190 3 1/2” GAS 3/4” GAS
TRHC 40-140 & 190 4 91/2” GAS
TRHB 50 7 3 1” GAS 1
TRHC 80 6 3/8” GAS 41 1/4” GAS
TRHE 100 1/2” GAS 1” GAS 1 1/2” GAS
TRHA 150 7 3/4” GAS 4 - 5 2 1/2” GAS
Table 5 - Pump series TRM – TRV
PUMP MODEL Connection Size Qty.
ADSZManifolds
TRMA 32-25 & TRMB 32-50 -1/8” GAS 1/4” GAS
TRMB 32-75 3/8” GAS -
TRMB & TRVB 40 1/8” GAS 1/2” GAS 1/2” GAS
TRMB & TRVB 50 3/4” GAS 1/4” GAS 3/4” GAS
TRVA 65 1/2” GAS 1/2” GAS 2
– 21 –

Table 8 (continued)
dB(A) lbs. lbs. 50 Hz 60 Hz 50 Hz 60 Hz
TRMA 32-25 69 37 40 2900 3500 0.75 1.1
TRMB 32-50 69 53 57 2900 3500 1.5 2.2
TRMB 32-75 70 81 91 2900 3500 3 4
TRMB 40-110 68 145 156 1450 1750 3 4
TRMB 40-150 69 167 233 1450 1750 4 5.5
TRMB 40-200 72 227 244 1450 1750 5.5 7.5
TRMB 50-300 72 277 —- 1450 —- 7.5 —-
dB(A) lbs. lbs. lbs. 50 Hz 60 Hz 50 Hz 60 Hz
TRVB 40-110 68 —- 136 —- 1450 1750 3 4
TRVB 40-150 69 —- 141 —- 1450 1750 4 5.5
TRVB 40-200 72 —- 172 —- 1450 1750 5.5 7.5
TRVB 50-300 72 —- 194 —- 1450 1750 7.5 10
TRVA 65-300 70 293 341 354 1450 1750 7.5 10
TRVA 65-450 70 321 387 442 1450 1750 11 15
dB(A) lbs. lbs. 50 Hz 60 Hz 50 Hz 60 Hz
SA0E3U 67 123 242 2900 3500 11 15
15 20
SA0G2D 69 183 297 2900 3500 11 18,5
15 25
SA0G2G 69 191 139 2900 3500 15 20
157 22 30
NOTES:
•Noise level (measured at 3 feet distance, without motor, with pump installed in
the system) for pump series TRH, TRM, TRV when operating at 60 Torr and
pump series TRS when operating at 175 Torr. Noise level test to ISO 3746
standards and with pumps at 50 Hz operating speeds.
•Weights are for pumps fitted with Mechanical Seals and in Cast Iron materials
(tolerance ± 10%).
•The assemblies, Monoblock and with Baseplate, are suitable for 50 Hz motors,
except where otherwise noted. Indicated total weights for the assemblies are
without motors.
•The installed motor size will cover the whole performance curve when operating
as vacuum pump.
– 24 –
9.12 - PUMP ENGINEERING DATA
Table 8
dB(A) lbs. lbs. lbs. 50 Hz 60 Hz 50 Hz 60 Hz
TRHE 32-4 67 30 42 70 1450 1750 0.55 0.75
TRHC 32-20 66 55 68 90 2900 3500 1.1 1.5
TRHE 32-20 66 40 50 75 2900 3500 1.1 1.5
TRHC 32-45 66 62 75 97 2900 3500 1.5 2.0
TRHE 32-45 66 46 56 81 2900 3500 1.5 2.0
TRHC 32-60 66 66 79 103 2900 3500 2.2 3
TRHE 32-60 66 57 68 95 2900 3500 2.2 3
TRHC 40-110 65 147 174 202 1450 1750 4 5
TRHE 40-110 65 108 134 160 1450 1750 4 5
TRHC 40-140 65 174 194 262 1450 1750 4 5
TRHE 40-140 65 147 167 220 1450 1750 4 5
TRHC 40-190 65 191 231 301 1450 1750 5.5 7.5
TRHE 40-190 65 165 205 260 1450 1750 5.5 7.5
TRHB 50-280 70 286 321 429 1450 1750 9 15
TRHB 50-340 70 308 374 466 1450 1750 11 15
TRHB 50-420 71 319 392 484 1450 1750 15 20
TRHC 80-600 76 484 539 792 1450 1750 22 30
TRHC 80-750 76 528 616 829 1450 1750 30 40
TRHE 100-870 79 906 —- 1263 960 1150 30 40
TRHE 100-1260 79 1067 —- 1434 960 1150 37 50
TRHE 100-1600 79 1140 —- 1518 960 1150 45 60
TRHA 150-2000 83 2926 —- 3971 730 880 75 100
TRHA 150-2600 84 3256 —- 4609 730 880 90 125
TRHA 150-3100 84 3586 —- 4939 730 880 110 150
TRSC 32-20 69 42 55 85 2900 3500 1.1 1.5
TRSE 32-20 69 32 45 68 2900 3500 1.1 1.5
TRSC 32-50 69 44 58 89 2900 3500 1.5 2.0
TRSE 32-50 69 38 47 73 2900 3500 1.5 2.0
TRSC 40-55 66 119 147 73 1450 1750 2.2 3
TRSE 40-55 66 75 103 130 1450 1750 2.2 3
TRSC 40-80 66 125 154 180 1450 1750 3 5.0
TRSE 40-80 66 81 110 136 1450 1750 3 5.0
TRSC 40-100 67 132 158 187 1450 1750 3 5.0
TRSE 40-100 67 86 114 141 1450 1750 3 5.0
TRSC 40-150 67 156 194 211 1450 1750 4 5.0
TRSE 40-150 67 97 125 152 1450 1750 4 5.0
TRSC 50-220 67 191 229 268 1450 1750 5.5 7.5
TRSE 50-220 67 162 202 240 1450 1750 5.5 7.5
TRSC 100-550 76 440 495 719 1450 1750 15 20
TRSC 100-700 76 506 561 836 1450 1750 18.5 30
TRSB 100-980 78 550 638 847 1450 1750 30 40
TRSE 125-1250 174 959 —- 596 960 1150 37 50
TRSE 125-1550 174 1016 —- 634 960 1150 45 60
TRSA 200-1950 183 2475 —- 1600 730 880 75 100
TRSA 200-2500 184 2695 —- 1700 730 880 75 100
TRSA 200-3100 184 2915 —- 1800 730 880 110 160
– 23 –
Noise
Level
Weight
Bare
Pump
Weight
assembly
Monoblock
(B5 design)
Weight
assembly
with
baseplate
Operating
Speed
RPM
Installed
Motor Size
kW
PUMP
MODEL
Noise
Level
Weight
assembly
Monoblock
50 Hz motor
Weight
assembly
Monoblock
60 Hz motor
Operating
Speed
RPM
Installed
Motor Size
kW
PUMP
MODEL
Noise
Level
Weight
Bare
Pump
Weight
assembly
Monoblock
(B5 design)
Weight
assembly
with
baseplate
Operating
Speed
RPM
Installed
Motor Size
kW
PUMP
MODEL
Noise
Level
Weight
assembly
Monoblock
50 Hz motor
Weight
assembly
Monoblock
60 Hz motor
Operating
Speed
RPM
Installed
Motor Size
kW
PUMP
MODEL

NOTE: See section 11.4 to 11.6 for OIL SEALED (DynaSeal™) systems start-up,
operation and shut-down.
11.1 - START-UP of WATER SEALED Systems
(In the following, reference is made to certain ITEM numbers, which appear on fig.
17 to 22 of section 9 and 18).
Open valve at gas discharge if installed and partially open the valve at the suction
side. When operating the pump as a compressor, there must be a check valve
ITEM 2, fitted at the discharge side. When pump ITEM 4, is fitted in a partial
recovery or total recovery or WATER SEALED systems, as built by TRAVAINI PUMPS
USA, it is required to have drain valve ITEM 11, at separator ITEM 1, in the closed
position, flow regulating valve ITEM 13, in the open positions. Before start-up fill
the pump to the shaft centerline, separator and piping of system with service liq-
uid through pump inlet flange or fill connection ITEM 28. Check all components for
leakage. Start all accessories (temperature switches, level switches, pressure
switches, etc.) open cooling and flushing lines. Start the pump and open the serv-
ice liquid valve, ITEM 3 if applicable, soon after, star t the circulating pump, ITEM
22 (if applicable) and adjust the service liquid flow (see table 3). Gradually open
the valve at gas suction side till the required vacuum level is reached. Check the
system for abnormal conditions (see section 12 and 14). If the system is fitted
with a circulating pump and/or the service liquid has an excessive pressure the
by-pass valve ITEM 13A, (if available) or valve, ITEM 13 can be adjusted to reduce
the service liquid flow to the vacuum pump and/or optimize the thermodynamic
efficiency of the heat exchanger ITEM 9.
NOTE: WATER SEALED systems engineered with multiple pumps are fitted with iso-
lating valves at suction, discharge, and service liquid lines of each pump. When
one or more pumps are not operating it is required to isolate the idle pump(s) by
closing these valves. When the pumps are put back into service the said valves
(at suction and discharge) must be opened.
11.2 - OPERATION
After starting the vacuum pump check the following:
•the vacuum level is as desired or adjust the flow-regulating valve to the required
vacuum
•flow and temperature of service liquid and/or cooling liquid are as expected
(within 25% tolerance)
•motor does not draw more amperage than shown on its nameplate
•the pump-motor assembly does not have abnormal vibrations and noises such
as cavitation
•the operating temperature at full load does not exceed approximately 85°C
•there are no leaks from mechanical seals, joints and flushing or cooling liquid
lines
•liquid level in separator is between the minimum and the maximum.
NEVER OPERATE THE PUMP DRY!
If the gas discharge is not open to the immediate atmosphere but it is piped to
other locations, the pump discharge should be checked for back-pressures that
could cause higher power consumption and loss of pump capacity.
– 26 –
10 - CHECK LIST PRIOR TO START-UP
All questions listed below must have POSITIVE answers prior to
proceeding to the pump start-up. Please note that the following is a
partial list. Special installations may require further precautions
therefore; additional safety steps must be taken as the case
dictates.
•This manual has been completely read, including the following chapters, and
is understood in its entirety?
•The piping system has been flushed of any foreign particles, welding
impurities, etc.?
•Have all piping and pump obstruction been removed?
•All connections and piping are leak proof and there are no external forces or
moments applied to the piping or pump flanges?
•Pump and motor are properly lubricated, per instructions?
•Pump/motor alignment has been checked?
•Mechanical seal flushing line has been connected, where required?
•All valves in the installation are in the correct position?
•All safety guards are in place?
•Pump direction of rotation has been checked by jogging the motor?
•The pump Stop switch is clear and visible?
•Pump as well as installation are ready for start-up?
11 - STARTING, OPERATING AND
STOPPING PROCEDURES
Upon receipt and/or completion of installation, before turning on the power to the
electric motor, rotate the pump shaft by hand to make sure that the pump rotor is
free. In the event the shaft does not turn, tr y to free the rotor by applying a torque
to the pump coupling with a pipe wrench. To free the rotor of a monoblock style
pump (without coupling) introduce a bolt (or similar tool) at the motor shaft end
that has a threaded connection and apply the torque by hand. In the event the
pump does not become free with the above procedures, fill up the pump with a
suitable solvent or lubricating liquid, let it rest for several hours to allow softening
of the rust build-up inside the pump, drain the pump and apply torque to the pump
shaft as described above to finally free the rotor.
NOTE: The selected solvent or lubricating fluid must be compatible with the pump,
seals and gasketing materials.
CHECK PUMP-MOTOR COUPLING ALIGNMENT!
This must be done prior to the first start-up and before every start-
up if pump or motor has been removed from the installation for
maintenance or other reasons. See section 7.2.
Prior to starting the pump verify that all auxiliary components are available, ready
for use and, where required, they are in the open position (i.e.: double mechani-
cal seals are pressurized with buffer liquid, cooling liquid to heat exchanger is
open, etc.) and the pump bearings are lubricated. If the gas and/or service liquid
temperatures are in the dangerous levels, it is recommended to insulate the
pump, piping and separator to avoid direct contact with their surface, avoid
freezing, thermal shock or loosing heat energy.
– 25 –

•the pressure gauge of the oil demister separator does not read more than 4 psi.
When this value is exceeded, it will be required to change the filter element.
If the gas discharge is not open to the immediate atmosphere but it is piped to
other locations, the pump discharge should be checked for back-pressures that
could cause higher power consumption and loss of pump capacity.
11.6 - SHUT DOWN OF “OIL SEALED (DynaSealTM)” SYSTEMS
Close, if applicable, the cooling water to the water/oil heat exchanger ITEM 9, then
turn off the power to the circulating pump ITEM 22. Where possible, gradually
decrease the vacuum level to 300-625 Torr in about 10 seconds max. The dis-
charged service liquid from pump ITEM 4 helps producing a slow deceleration
rather than sudden stop.
Turn off motor ITEM 6, radiator ITEM 9 and any accessories and flushing circuitry.
Make sure the non-return valves ITEM 2, or similar, at suction and discharge lines
are leak tight. Should the system be idle for an extended period of time it is rec-
ommended to disconnect the electricity to the motor panel, drain all liquids from
pump, separator and piping. Refer to chapter 6 for storage procedures.
12 - OPERATING MAINTENANCE
Periodically check the working conditions of the system by means of the instru-
mentation on the installation (pressure gauges, vacuum gauges, temperature
gauges, ampmeters, etc.) and that the pump is consistently handling the applica-
tion for which it was selected. The operation of the pump should be without abnor-
mal vibrations or noises, if any of these problems is noticed, the pump should be
stopped immediately, search for the cause and make the necessary corrections.
It is good practice to check the pump/motor alignment, the running conditions of
the bearings and of the mechanical seals (see section 13) at least once a year,
even if no abnormalities have been noticed. If there is a deterioration of the pump
performance, which is not attributable to changes in system demands, the pump
must be stopped and proceed with necessary repairs or replacement. If the
mechanical seals are fitted with external flushing and/or quenching lines their
pressures, temperatures and flows must be checked constantly.
NEVER ALLOW THE PUMP TO OPERATE IN THE CAVITATION AREA!
Cavitation has the characteristic metallic sound, like if gravel was rotating inside
the pump, and it causes also high pump vibrations. This happens when the pump
is running at absolute pressures close to the vapor pressure of the service liquid
at the running conditions. This is a damaging condition for the impellers, por t
plates and casings. The cavitation causes erosion taking away metal particles and
attacking the surface of the pump components. This is particularly damaging if the
pump is handling corrosive gases, see chapter 14 for suggestions to correct the
problem.
Pump series TRH, TRM and TRV are fitted with an anti-cavitation valve that should
be left open (if required) see fig. 23 and 24 for the location. This valve should be
connected toward the upper part of the discharge separator so that, depending
upon the operating vacuum, the pump can either take air or discharge excessive
liquid. For OIL SEALED (DynaSeal™) systems the anti-cavitation valve ITEM 13H
is piped from pump ITEM 4 to the frame separator ITEM 1B.
– 28 –
11.3 - SHUT DOWN of “WATER SEALED” SYSTEMS
First close the service liquid flow and cooling liquid flow (if applicable) then shut
down the circulating pump, ITEM 22, (if applicable). Where possible, gradually
decrease the vacuum level to 300-675 Torr in about 10 seconds max or, if com-
pressor, decrease the discharge pressure. The discharged service liquid from
pump, ITEM 4, helps produce a slow deceleration rather than sudden stop. Turn
off the power to motor ITEM 6 and close any accessories and flushing lines. Make
sure the non-return valves, ITEM 2 or similar, at suction and discharge lines are
leak tight. Should the system be idle for an extended period of time it is recom-
mended to disconnect the electricity to the motor or control panel and drain all liq-
uids from pump, separator and piping. Refer to chapter 6 for storage procedures.
11.4 – START-UP OF “OIL SEALED (DynaSealTM)” SYSTEMS
(In the following, reference is made to certain ITEM numbers which are listed in
the figures and legend of section 12.1 and 19). Open the valve at the gas dis-
charge, if applicable, and partially close the valve at the suction side. Close drain-
ing valve ITEM 11, and valves for condensate recovery ITEMS 13F and 13L, which
are on the frame separator, ITEM 1B; open the valve ITEM 13D which is between
the circulating pump, ITEM 22, and the frame separator, ITEM 1B, then partially
open flow regulating valve, ITEM 13 between the discharge of circulating pump,
ITEM 22 and the heat exchanger, ITEM 9, and the by-pass valve, ITEM 13A. If the
system is fitted with a separator cyclone, ITEM 1D, and the adjacent collecting
tank, ITEM 1E, it is required to close valves, ITEM 11A and 12 and open valve
ITEM 13E. Fill frame separator with service oil through the filling plugs ITEM 28.
Proper oil level can be seen on sight glass ITEM 7. Refer to table 12 and 13 for
the required oil quantity. Start and/or open applicable accessories (temperature
switches, level switches, etc.) and circuitry for cooling and flushing. Start vacu-
um pump, ITEM 4, and soon after, star t the circulating pump, ITEM 22. Adjust the
circulating pump capacity with valve ITEM 13. Gradually open the system suction
valve till the desired vacuum is achieved. Check the systems for abnormal noises
or vibrations (see section 12 and 14). Adjust by-pass valve ITEM 13A, to regulate
the oil flow to the vacuum pump or to improve the thermodynamic efficiency of the
heat exchanger.
NOTE: OIL SEALED (DynaSealTM) systems engineered with multiple pumps are fit-
ted with isolating valves at suction, discharge, and service liquid lines of each
pump. When one or more pumps are not operating, it is required to isolate the idle
pump(s) by closing these valves. When the pumps are put back into service the
said valves (at suction and discharge) must be opened.
11.5 - OPERATION OF “OIL SEALED (DynaSealTM)” SYSTEMS
After starting the vacuum pump check the following:
•the vacuum level is as desired or adjust the flow-regulating valve to the required
vacuum
•the oil temperature is between 140 and 175°F. If required, adjust the thermo-
stat on the radiator or in case of water/oil heat exchanger adjust the cooling
water flow
•motor does not draw more amperage than shown on its nameplate
•the pump-motor assembly does not have abnormal vibrations or noises such as
cavitation
•the surface temperature at full load, does not exceed approximately 85°F
•that there are no leaks from mechanical seals, joints, flushing or cooling liquid
lines
•liquid level in separator and pump is between the minimum and the maximum
– 27 –

installed at the housing, ITEM 2, will pro-
vide an indication of the filter being
plugged; pressure reading over 4 psi.
maybe an indication that the filter needs
replacement. At higher discharge pres-
sures the discharged air quality will
decrease and the vacuum pump
absorbed power will increase.
To replace the oil demister filter, simply
disconnect the oil scavenger line,
remove the cover, ITEM 25, remove the
used filter element, apply a gasketing
material over the gasket faces of the
new filter and place the latter in the
housing, put in place the cover and the
scavenger line.
– 30 –
During operation it must be avoided to have sudden and frequent variations from
high to low vacuum. (e.g. suddenly opening the suction valve when the pump is
operating at pressures lower than 150 Torr). This would flood the pump creating
high power absorption that would put heavy stress on the motor and coupling.
Particular attention should be put on the quantity of the service liquid flow. The
flow will depend upon the type of installation (see section 9), the pump size,
and/or the desired temperature rise. The flow of ser vice water at 15 °C, for stan-
dard pumps and normal operating conditions at various vacuum levels, is listed
on the specific pump curves and/or on table 3 of section 9.7. Usually the tem-
perature rise of service water, when handling dry air at 68 °F, is approximately 10
°F. When condensable (e.g.: vapours) are present in the gas stream the heat load
to be removed by the service water will be higher, therefore the ser vice water tem-
perature rise will be higher. The service liquid flow and its temperature will affect
the pump performance. Generally the low service liquid flow will decrease the
pump capacity, while a high service liquid flow will increase the absorbed power
by flooding the pump (see section 17 for information and calculations). Hard serv-
ice water will generate lime build-up inside the pump. The severity of the deposit
will vary with the water temperature. Lime or mineral deposits on the surface of
the internal pump components will cause an increase of absorbed power, wear of
the components and eventually will seize the pump. It is recommended to moni-
tor the water hardness and, if too high, treat the water. If there are no alternatives,
there should be periodical flushing of the pump with a solution that will remove
the specific deposits, or the pump must be periodically disassembled, cleaned of
all incrustations and re-assembled. Systems with total service liquid recovery
require periodical change of the service liquid contained in the closed loop. The
heat exchanger must be kept well cleaned of all mineral deposits for an effective
thermodynamic heat exchange. During operation, a closed loop system will lose
some of the service liquid, due to evaporation and/or saturation of the discharged
gases. It will be required to periodically make-up fresh liquid into the system. This
operation is not required for those systems that are fitted with a float type auto-
matic make-up valve ITEM 8. This valve requires water at a pressure of approxi-
mately 2 bar. Systems that handle condensable will experience a rise in the level
of the service liquid in the separator. The excessive liquid will be over flowed
through the overflow valve or connection. If the specific gravity of the condensa-
ble is higher than that of the service liquid, the condensable must be discharged
through the separator drain valve ITEM 11, preferably with system not running.
12.1 - “OIL SEALED (DynaSealTM)” SYSTEMS
(For ITEM numbers refer to fig. 27 and it’s legend).
It is very important to keep the service oil temperature under control when the oil
temperature exceeds 90 °C there is the danger of seizing the pump and the gas-
keting may start leaking.
Every 100 - 200 working hours it is suggested to check the oil level in the oil reser-
voir, make-up oil if necessar y and change the oil ever y 10,000 working hours
(depending upon the use and the application).
Those installations where the handled gases are contaminated with dust or sus-
pended solids that can alter the oil characteristics will require more frequent oil
check and changes.
Condensable vapors, if present during evacuation, can be flushed right through the
discharge of the separator (if they have low boiling point) or, when the system is
idle, can be drained by opening valves, ITEM 16. During operation, the oil demis-
ter filter will be impregnated with oil particles; the pressure gauge, ITEM 2,
– 29 –
TYPICAL BILL OF MATERIALS
Fig 27 (General Schematic Drawing)

Mechanical seals MUST NOT run dry! When seals are operated with
out lubricant and/or flushing liquid their faces and the elastomers
may suffer damages beyond repair. It is suggested to check the
conditions of the seal faces every approximately 4000 working
hours.
Table 9
PUMP MODEL
BEARING MECHANICAL SEAL
Quantity Type Grease Quantity Quantity Diameter
each bearing - gr. mm
TRHE 32-4 1 6302.2RSR 1 16
TRHC and TRSC 32
TRHE 32-20/45/60–TRSE 32 2 6304.2RSR 2 22
TRHE 40-110 – TRSE 40 6305.2RSR
TRMA 32-25 16304.2RSR 28
16204.2RSR
TRMB 32-50 16305.2RSR
16205.2RSR 24
TRMB 32-75 16306.2RSR
16206.2RSR 1 28
TRMB 40-110 13208.2RSR —-
16206.2RSR
TRMB 40-150 13208.2RSR 35
16306.2RSR
TRVB 40-110/150 2 6208.2RSR
TRMB 40-200 and 50-300 13210.2RSR
16308.2RSR 45
TRVB 40-200 and 50-300 16210.2RSR
16208.2RSR
TRHC and TRSC 40
TRHE 40-140/190 2 6306.2RSR 35
TRSC and TRSE 50
TRHB 50 - TRVA 50 and 65 6308 20 43
TRHB/C 80 - TRSB/C 100 6310 35 2 55
TRHE 100 - TRSE 125 16314
1NU 314 50 75
TRHA 150 - TRSA 200 27320B.MB.UA
1
22320ES.TVPB.C3
180 110
NOTE: The supplied data are for pumps in STANDARD construction. For special
construction please contact TRAVAINI PUMPS USA.
– 32 –
13 - BEARINGS AND MECHANICAL
SEALS MAINTENANCE
WARNING: The maintenance must be carried out with the pump turned off and
the electrical power, or other driving mechanism, must be disconnected. The
power should only be turned back on by the same person doing the mainte-
nance. It is, however, recommended to have at least a team of two workers
doing the maintenance and the supervisors should be fully aware of the work in
progress.
CAREFULLY FOLLOW THE SAFETY PROCEDURES LISTED IN
CHAPTER 2.
13.1 - BEARINGS
At assembly time the pump bearings are lubricated with quality grease (sealed
bearings are greased for life). Some of the recommended greases are:
BP - ENERGREASE LS - EP 2 MOBIL - MOBILUX EP 2
EXXON - BEACON EP 2 SHELL - SHELL ALVANIA EP GREASER
Bearings for pumps working in standard conditions should be lubricated every
2000/2500 working hours with a quality grease (see “Disassembly & Assembly”
for the replacement of bearings). Bearing temperature should not exceed the 85
°C during normal working conditions and normal environments. Bearings can over-
heat for reasons such as too much grease, misalignment of flexible coupling,
wrong bearings, excessive vibrations, bearing wear. See tab. 9 for bearing num-
bers and type used for each pump.
13.2 - MECHANICAL SEALS
Mechanical seals can be with many
types of materials, design and installa-
tions (see fig. 28). TRAVAINI PUMPS USA
has evaluated their selection at the time
of pump design; it is a function of the
fluid and working conditions. The seals
are supplied with the proper flow of liquid
for their lubrication, through internal
pump passages. Upon request, the
pump can be provided with seal lubrica-
tion coming from an outside source; the
set-up must be such that the seals are
guaranteed the liquid quantity and pres-
sure as recommended by TRAVAINI
PUMPS USA or by the seal manufacturer.
For mechanical seal shaft size see table 9.
Mechanical seals normally fitted in the vacuum pumps are to DIN 24960
standards. See “Disassembly & Assembly Instructions” for major seal dimen-
sions. Normally mechanical seals do not require maintenance until there is a
visible liquid loss (leakage). See “Disassembly & Assembly Instructions” for seal
replacement.
– 31 –

CAUSES SOLUTIONS
14 Inadequate seal lubrication Check flushing liquid temperature, flow and
pressure
15 Mineral deposits from hard Clean the pump
water
16 Foreign particles in pump Disassemble the pump to remove the foreign
objects (see “Disassembly & Assembly
Instructions”)
17 Low suction pressure Open the vacuum regulating valve and/or the
anti-cavitation valve (vacuum relief valve)
18 Wrong pump rotation Reverse the rotation (see section 8)
19 Bad gaskets Replace the defective gaskets (see the
“Disassembly & Assembly Instructions”)
20 Wrong motor connections Check the electrical connections (connectors,
fuses, breakers) and the power supply line
(see section 8)
21 Pump seized Disassemble and repair the pump (see
“Disassembly & Assembly Instructions”)
22 Pump undersized Select a pump with higher capacity
23 Pump worn-out Disassemble and repair the pump (see
“Disassembly & Assembly Instructions”)
24 Excessive liquid flow Reduce the liquid flow through the pump suction;
through suction line install a centrifugal separator (cyclone)
before the pump
25 Instrumentation out of Check the working characteristics, replace
calibration if required
15 - REPAIRING AND REMOVING
PUMP FROM THE INSTALLATION
Should there be the need for pump repair a knowledge of the specific
“Disassembly and Assembly Instructions” is required.
FOLLOW THE SAFETY PRECAUTION MEASURES OUTLINED IN
CHAPTER 2.
Before working on the pump it is important to:
•procure and wear the proper safety equipment (hard hat, safety glasses, gloves,
safety shoes, etc.)
•disconnect the electrical power supply and, if required, disconnect the electrical
cable from the motor
•close the isolating valves at pump inlet, outlet and service liquid
•let the pump cool down to ambient temperature if it has been handling hot fluids
•adopt safety measures if the pump has been handling hazardous liquids
•drain the pump internals of the pumped liquid through the draining connections,
if necessary rinse with neutral liquid.
To remove the pump and the motor from the installation proceed as follows:
•remove bolts from pump suction and discharge flanges
•remove the coupling guard
•remove the spacer of the coupling, if there is one
– 34 –
14 - TROUBLE SHOOTING: PROBLEMS,
CAUSES AND SOLUTIONS
Consult the following table when problems are experienced, if solutions are not
found in this chart or should there be any doubts; do not hesitate to contact
TRAVAINI PUMPS USA or your local distributor.
Table 10 - LIST OF PROBLEMS
PROBLEM LIST OF POSSIBLE CAUSES
Pump does not create or the 1 - 2 - 3 - 4 - 9 - 11 - 18 - 19 – 22 - 23 - 24 - 25
vacuum is too low
Excessive noise 1 - 4 - 5 - 6 - 7 - 10 – 24
High power consumption 1 - 5 - 6 - 8 - 9 - 15 - 24 – 25
Vibration 5 - 6 - 7 - 8 - 10 - 12 - 13 – 24
Mechanical seal leaking 11 – 14
Pump looses liquid 11 – 19 - 23
Bearing failure 5 - 6 – 7
Pump does not start 1 - 6 – 20 - 21
Shaft partially or totally locked 6 - 10 - 15 - 16 - 21
Cavitation 3 - 4 – 8 - 9 - 17 - 24
CAUSES SOLUTIONS
1Defective motor or Check the voltage, the frequency, motor type,
wired wrong power consumption, rotation, wiring
connections, phase consistency
2Leakage in suction piping Repair piping; check valves for leakage
3Service liquid high Lower the service liquid temperature;
temperature check the level of the service liquid; adjust the
cooling liquid flow; adjust the radiator
thermostat to lower temperature setting
4Low service liquid flow Increase the service liquid flow
5Coupling misalignment Re-align the coupling and the pump/motor
assembly (see cap. 7)
6Faulty bearing Replace the bearing(see “Disassembly &
Assembly Instructions”)
7Cavitation Open the anti-cavitation valve or set the relief
valve to a lower vacuum (see table 4 to 6)
8High service liquid flow Reduce the service liquid flow; adjust the by-
pass valve
9High back pressure Check the discharge line for obstructions or high
friction losses; reduce the back-pressure to
maximum 0.1 bar
10 Wrong pump/motor Verify that the base surface is level and that all
assembly pump feet are resting on the sur face,
add spacers if required (see section 11)
11 Mechanical seal failure Change the mechanical seal (see “Disassembly
& Assembly Instructions”)
12 Wrong pump mounting Remount the pump (see section 7)
13 Piping weight resting Support the piping with hangers or other means
on pump (see section 11)
– 33 –