USER INSTRUCTIONS

Worthington® N-Series of Thrust Pot Installation

for Vertical, Multistage Pumps
Operation
Maintenance
Original Instructions
PCN= 26999948 07-14 (E)
 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

CONTENTS
PAGE
1.0 INTRODUCTION AND SAFETY ............................ 3
1.1 GENERAL ................................................................. 3
1.2 CE MARKING AND APPROVALS ................................ 3
1.3 DISCLAIMER ............................................................. 3
1.4 COPYRIGHT ............................................................. 3
1.5 DUTY CONDITIONS ................................................... 3
1.6 SAFETY .................................................................... 4
2.0 TRANSPORT AND STORAGE ............................. 7
2.1 CONSIGNMENT RECEIPT AND UNPACKING ............... 7
2.2 HANDLING ................................................................ 7
2.3 LIFTING .................................................................... 7
2.4 STORAGE ................................................................. 7
2.5 RECYCLING AND END OF PRODUCT LIFE ................. 7
3.0 COMMISSIONING START-UP, OPERATION
AND SHUTDOWN .......................................................... 8
3.1 PUMP LUBRICANTS .................................................. 8
3.2 OPERATION............................................................ 10
4.0 MAINTENANCE ..................................................... 10
4.1 GENERAL ............................................................... 10
4.2 MAINTENANCE SCHEDULE ..................................... 10
4.3 SPARE PARTS ........................................................ 10
4.4 RECOMMENDED SPARES ....................................... 11
4.6 DISASSEMBLY ........................................................ 12
4.7 ASSEMBLY ............................................................. 12
5.0 FAULTS; CAUSES AND REMEDIES ................ 13

6.0 PARTS LIST AND DRAWINGS ........................... 14

6.1 ASSEMBLY 0N-1N ................................................. 14
6.2 ASSEMBLY 3N-7N ................................................. 15
6.3 ASSEMBLY 8N ....................................................... 16
7.0 CERTIFICATION .................................................... 17

8.0 OTHER RELEVANT DOCUMENTATION AND

MANUALS ..................................................................... 17
8.1 SUPPLEMENTARY USER INSTRUCTIONS ................ 17
8.2 CHANGE NOTES ..................................................... 17
8.3 ADDITIONAL SOURCES OF INFORMATION .............. 17
8.4 ABBREVIATIONS ..................................................... 18

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

instructions. Where applicable this document

incorporates information relevant to these Directives.
To establish Approvals and if the product itself is CE
Marked check the serial number plate and the
1.0 INTRODUCTION AND SAFETY Certification.

1.1 General 1.3 Disclaimer

Information in these User Instructions is believed to
These Instructions must always be kept be complete and reliable. However, in spite of all of
close to product's operating location or directly the efforts of Flowserve Corporation to provide
with the product. comprehensive instructions, good engineering and
safety practice should always be used.
Flowserve's products are designed, developed and
manufactured with state-of-the-art technologies in Flowserve manufactures products to exacting
modern facilities. The unit is produced with great care International Quality Management System Standards
and commitment to continuous quality control, as certified and audited by external Quality
utilizing sophisticated quality techniques, and safety Assurance organizations. Genuine parts and
requirements. accessories have been designed, tested and
Flowserve is committed to continuous quality incorporated into the products to help ensure their
improvement and being at service for any further continued product quality and performance in use. As
information about the product in its installation and Flowserve cannot test parts and accessories sourced
operation or about its support products, repair and from other vendors the incorrect incorporation of such
diagnostic services. parts and accessories may adversely affect the
These instructions are intended to facilitate performance and safety features of the products. The
familiarization with the product and its permitted use. failure to properly select, install or use authorized
Operating the product in compliance with these Flowserve parts and accessories is considered to be
instructions is important to help ensure reliability in misuse. Damage or failure caused by misuse is not
service and avoid risks. The instructions may not take covered by Flowserve's warranty. In addition, any
into account local regulations; ensure such regulations modification of Flowserve products or removal of
are observed by all, including those installing the original components may impair the safety of these
product. Always coordinate repair activity with products in their use.
operations personnel, and follow all plant safety
requirements and applicable safety and health 1.4 Copyright
laws/regulations. All rights reserved. No part of these instructions may
be reproduced, stored in a retrieval system or
These instructions must be read prior to transmitted in any form or by any means without prior
installing, operating, using and maintaining the permission of Flowserve.
equipment in any region worldwide. The equipment
must not be put into service until all the conditions 1.5 Duty conditions
relating to safety, noted in the instructions, have This product has been selected to meet the
been met. Failure to follow and apply the present specifications of your purchaser order. The
user instructions is considered to be misuse. acknowledgement of these conditions has been sent
Personal injury, product damage, delay or failure separately to the Purchaser. A copy should be kept
caused by misuse are not covered by the Flowserve with these instructions.
warranty.
The product must not be operated beyond
1.2 CE marking and approvals the parameters specified for the application. If
It is a legal requirement that machinery and there is any doubt as to the suitability of the
equipment put into service within certain regions of product for the application intended, contact
the world shall conform with the applicable CE Flowserve for advice, quoting the serial number.
Marking Directives covering Machinery and, where
applicable, Low Voltage Equipment, Electromagnetic If the conditions of service on your purchase order
Compatibility (EMC), Pressure Equipment Directive are going to be changed (for example liquid pumped,
(PED) and Equipment for Potentially Explosive temperature or duty) it is requested that the user
Atmospheres (ATEX). seeks Flowserve´s written agreement before start up.
Where applicable the Directives, and any additional
Approvals, cover important safety aspects relating to
machinery and equipment and the satisfactory
provision of technical documents and safety

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1.6 Safety 1.6.2 Personnel qualification and training

All personnel involved in the operation, installation,
1.6.1 Summary of safety markings inspection and maintenance of the unit must be
qualified to carry out the work involved. If the
These user instructions contain specific safety
personnel in question do not already possess the
markings where non-observance of an instruction
necessary knowledge and skill, appropriate training
would cause hazards. The specific safety markings
and instruction must be provided. If required the
are:
operator may commission the manufacturer / supplier
to provide applicable training.
Always co-ordinate repair activity with operations and
This symbol indicates electrical safety instructions health and safety personnel, and follow all plant
where non-compliance will involve a high risk to safety requirements and applicable safety and health
personal safety or the loss of life. laws/regulations.

This symbol indicates safety instructions 1.6.3 Safety action

where non-compliance would affect personal safety This is a summary of conditions and actions to
and could result in loss of life. help prevent injury to personnel and damage to
the environment and to equipment. For products
used in potentially explosive atmospheres
This symbol indicates "hazardous and toxic
section 1.6.4 also applies.
fluid" safety instructions where non-compliance would
affect personal safety and could result in loss of life.

This symbol indicates safety NEVER DO MAINTENANCE WORK WHILST THE

instructions where non-compliance will involve some UNIT IS CONNECTED TO POWER
risk to safe operation and personal safety and would
damage the equipment or property.
GUARDS MUST NOT BE REMOVED WHILE
PUMP IS OPERATIONAL
This symbol indicates "strong magnetic
field" safety instructions where non-compliance would
ONLY CHECK DIRECTION OF
affect personal safety, pacemakers, instruments or MOTOR ROTATION WITH COUPLING ELEMENT/
stored data sensitive to magnetic fields. PINS REMOVED
Starting in reverse direction of rotation will damage
This symbol indicates explosive atmosphere the pump.
marking according to ATEX. It is used in safety
instructions where non-compliance in the hazardous
ENSURE CORRECT
area would cause the risk of an explosion.
LUBRICATION (See section 3.0, Commissioning,
startup, operation and shutdown.)
This symbol is used in safety instructions to
remind not to rub non-metallic surfaces with a dry
cloth; ensure the cloth is damp. It is used in safety NEVER RUN THE PUMP DRY
instructions where non-compliance in the hazardous
area would cause the risk of an explosion.
DO NOT RUN THE PUMP AT
ABNORMALLY HIGH OR LOW FLOW RATES
The sign is not a safety symbol but Operating at a flow rate higher than normal or at a flow
indicates an important instruction in the assembly rate with no back pressure on the pump may overload
process. the motor and cause cavitation. Low flow rates may
cause a reduction in pump/bearing life, overheating of
This symbol indicates potential risks the pump, instability and cavitation/vibration.
connected with extremely high temperatures.

This symbol indicates potential risks HANDLING COMPONENTS

connected with extremely low temperatures. Many precision parts have sharp corners and the
wearing of appropriate safety gloves and equipment
is required when handling these components. To lift
heavy pieces above 25 kg (55 lbs) use a crane

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corresponding to the mass and in accordance with 1.6.4.2 Marking

current local regulations. An example of ATEX equipment marking is shown
below. The actual classification of the pump will be
engraved on the nameplate.
HOT AND COLD PARTS
If hot or freezing components or auxiliary heating
supplies can present a danger to operators, they II 2 GD c IIC135ºC (T4)
must be shielded to avoid accidental contact. If
complete protection is not possible, the machine Equipment Group
access must be limited to maintenance staff only. I = Mining
II = Non-mining
Bearing housings must not be insulated Category
and drive motors and bearings may be hot. 2 or M2 = High level protection
3 = normal level of protection
If the temperature is greater than 80 °C (175 °F) o r
Gas and/or Dust
below -5 °C (20 °F) in a restricted zone, or
G = Gas; D= Dust
exceeds local regulations, action as above shall
be taken. c = Constructional safety
(in accordance with EN13463-5)

1.6.4 Products used in potentially explosive b = Control of ignition source

atmospheres (in accordance with EN13463-6)
Gas Group
Measures are required to: IIA – Propane (Typical)
• Avoid excess temperature IIB – Ethylene (Typical)
• Prevent dry running IIC – Hydrogen (Typical)
• Prevent the generation of sparks Maximum surface temperature (Temperature Class)
• Maintain the pump to avoid hazard (see section 1.6.4.3)

The following instructions for pumps and pump units 1.6.4.3 Avoiding excessive surface
when installed in potentially explosive atmospheres temperatures
must be followed to help ensure explosion protection.
For ATEX, both electrical and non-electrical equipment ENSURE THE EQUIPMENT TEMPERATURE
must meet the requirements of European Directive CLASS IS SUITABLE FOR THE HAZARD ZONE
94/9/EC. Always observe the regional legal Ex
requirements eg Ex electrical items outside the EU may Pumps have a temperature class as stated in the
be required certified to other than ATEX eg IECEx, UL. ATEX Ex rating on the nameplate. These are based
on a maximum ambient of 40 ºC (104 ºF); refer to
1.6.4.1 Scope of compliance Flowserve for higher ambient temperatures.

Use equipment only in the zone for which it is The surface temperature on the pump is influenced
appropriate. Always check that the driver, drive by the temperature of the liquid handled. The
coupling assembly, seal and pump equipment are maximum permissible liquid temperature depends on
suitably rated and/or certified for the classification of the the temperature class and must not exceed the
specific atmosphere in which they are to be installed. values in the table that follows.
Temperature class Maximum surface Temperature limit of
to EN13463-1 temperature permitted liquid handled *
T6 85 °C (185 °F) Consult Flowserve
T5 100 °C (212 °F) Consult Flowserve
* The table only takes the ATEX temperature class into consideration.
Pump design or material, as well as component design or material,
may further limit the maximum working temperature of the liquid.

The temperature rise at the seals and bearings and

due to the minimum permitted flow rate is taken into
account in the temperatures stated.
The responsibility for compliance with the
specified maximum liquid temperature is with the
plant operator.
Temperature classification “Tx” is used when the
liquid temperature varies and the pump could be

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installed in different hazarous atmospheres. In this adversely affect the ambient conditions. Where there
case the user is responsible for ensuring that the is a risk from such tools or materials, maintenance
pump surface temperature does not exceed that must be conducted in a safe area.
permitted in the particular hazardous atmosphere.
It is recommended that a maintenance plan and
If an explosive atmosphere exists during the schedule is adopted. (See section 4.0,
installation, do not attempt to check the direction of Maintenance.)
rotation by starting the pump unfilled. Even a short
run time may give a high temperature resulting from
contact between rotating and stationary components.

Where there is any risk of the pump being run against

a closed valve generating high liquid and casing
external surface temperatures, fit an external surface
temperature protection device.

Avoid mechanical, hydraulic or electrical overload by

using motor overload trips, temperature monitor or a
power monitor and make routine vibration monitoring
checks.

In dirty or dusty environments, make regular checks

and remove dirt from areas around close clearances,
bearing housings and motors.

1.6.4.4 Preventing dry running

ENSURE THAT THE THRUST POT IS

PROPERLY FILLED ANS DOES NOT RUN DRY

Ensure that the oil level is as per section 3.1.4.

The bearing temperature shall be monitored by
means of a PT 100, surface contact type.

1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical

contact, the coupling guard must be non-sparking.

To avoid the potential hazard from random induced

current generating a spark, the baseplate must be
properly grounded.

Avoid electrostatic charge: do not rub non-metallic

surfaces with a dry cloth; ensure cloth is damp.

For ATEX application sthe coupling must be selected

to comply with 94/9/EC. Correct coupling alignment
must be maintained.

1.6.4.6 Maintenance to avoid the hazard

CORRECT MAINTENANCE IS REQUIRED TO

AVOID POTENTIAL HAZARDS WHICH GIVE A
RISK OF EXPLOSION

The responsibility for compliance with maintenance

instructions is with the plant operator.
To avoid potential explosion hazards during
maintenance, the tools, cleaning and painting
materials used must not give rise to sparking or

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

2.0 TRANSPORT AND STORAGE

Make sure that hazardous substances are
2.1 Consignment receipt and unpacking disposed of safely and that the correct personal
protective equipment is used. The safety
Immediately after receipt of the equipment it must be
specifications must be in accordance with the current
checked against the delivery/shipping documents for
regulations at all times.
its completeness and that there has been no damage
in transportation. Any shortage and/or damage must
be reported immediately to Flowserve Pump Division
and must be received in writing within one month of
receipt of the equipment. Later claims cannot be
accepted.

Check any crate, boxes or wrappings for any

accessories or spare parts that may be packed
separately with the equipment or attached to side
walls of the box or equipment.

Each product has a unique serial number. Check

that this number corresponds with that advised and
always quote this number in correspondence as well
as when ordering spare parts or further accessories.

2.2 Handling
Boxes, crates, pallets or cartons may be unloaded
using fork lift vehicles or slings dependent on their
size and construction.

2.3 Lifting
A crane must be used for all pump sets in
excess of 25 kg (55 lb.). Fully trained personnel must
carry out lifting, in accordance with local regulations.

Before lifting the driver alone, refer to the

manufacturer’s instructions.

2.4 Storage
Store the unit in a clean, dry location
away from vibration. Leave protective covers and
plugs in place to keep dirt and other foreign material
out of the unit. Turn shaft at intervals to prevent false
brinelling of the bearings.

The unit may be stored as above for up to 6 months.

Consult Flowserve for preservative actions when a
longer storage period is needed.

2.5 Recycling and end of product life

At the end of the service life of the product or its
parts, the relevant materials and parts should be
recycled or disposed of using an environmentally
acceptable method and local requirements. If the
product contains substances that are harmful to the
environment, these should be removed and disposed
of in accordance with current regulations. This also
includes the liquids and/or gases that may be used in
the "seal system" or other utilities.

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3.0 COMMISSIONING START-UP, A too high oil level will result in higher bearing
OPERATION AND SHUTDOWN temperatures and therefore poorer lubrication.

3.1.5 Oil quality

These operations must be
carried out by fully qualified personnel. Oil used for lubrication should only be of high quality.
The viscosity of the oil at working temperature must
be at least 10 cSt. The pouring point of the oil must
3.1 Pump Lubricants be in accordance with the lowest expected
temperature of the bearing housing during a stop of
3.1.1 Lubrication the pump. For recommended lubricating oils refer to
The bearing housing shall be filled with proper the lubrication table.
lubricating oil prior to start up. If the pump will be Having selected the corresponding oil quality the
started after a longer storage period, the bearing actual oil temperature at the bearing housing must be
housing should be first flushed and cleaned with checked after two service hours of the pump.
gasoline. It is not necessary to remove the Considering this measured oil temperature the actual
preservation oil as this will mix up thoroughly with the viscosity must be determined by using the data sheet
lubrication oil. of the oil, to verify the minimum required viscosity of
Lubrication is provided by the pumping effect of the 10 cSt. Do not forget, the oil temperature in the
rotating ball bearings. Maintaining the correct oil level bearing itself is about 10 °C ( ∆ 18°F) higher than the
(middle of the oil sight glass) ensures that the lower oil temperature at the bearing housing. On the
ball bearing is covered with oil. following table the oil viscosity is given at 40 °C
As option a ¼” NPT connection for a purge oil mist (104 °F). Determining the correct lubricating oil o ne
lubrication is provided (refer to General Arrangement must take into consideration that all bearings will
Drawing). have higher temperatures during the first 20 service
For recommended lubricating oils refer to the hours. In constant operation the bearing temperature
lubrication table. will decrease about 10 °C (50 °F). The oil
temperature shall be lower than 85 °C (185 °F) afte r
3.1.2 Purge oil mist lubrication this running-in time. The bearing outer race
temperature should not exceed 95°C (204°F). If the
For preventing, that dirt or humidity get into the bearing
temperature is higher, the reason may be a wrong oil
housing, this pump is equipped with a ¼“ NPT
quality, wrong oil level or overload of the pump
connection for air or nitrogen supply.
because of excessive wear.
Also at standstill the air or nitrogen supply shall be
If the humidity at the site is high, the roller bearings
maintained.
become easily rusty during stand still periods. To
avoid that, we recommend mixing the lubricating oil
The pressure shall be between with a corrosion inhibitor contact your lubrication oil
0.01 bar (0.14 psi) and 0.02 bar (0.29 psi), otherwise supplier for proper additives inhibitors.
you have to consider an oil leakage and as a result a
bearing damage . 3.1.6 Oil quantity
The provided flow rate shall be 0,1 SCFM. Bearing size is shown on the name plate of the
The supplied air or nitrogen shall be clean and dry. pump, and with this the correct thrust bearing frame
can be selected according to the following table.
3.1.3 Oil change
After first start up, the oil shall be changed after 200 Thrust bearing No. Oil quantity l (Fl.oz.) Bearing size
service hours.
0N 0.5 (16.9) 7210 BECBJ
Every further oil change shall take place after about
2000 service hours or at least every 6 month. 1N 1.5 (50.7) 7313 BECBJ
3N 2 (67.6) 7315 BECBJ
3.1.4 Oil level
4N 2.5 (84.5) 7317 BECBJ
The correct oil level is in the middle of the oil sight glass
5N 3 (101.4) 7318 BECBJ
and shall be checked when pump is not in operation.
Periodically check if the lubricating oil is mixed with any 6N 5 (169) 7322 BECBM
condensed water. Careful opening of the oil drain 7N 6.5 (219.8) 7326 BCBM
during a stop of the pump will show any water.
7232 BCBM
8N 6.5 (219.8)
7330 BCBM
During operation the level will decrease
due to circulation of the oil through the bearings.

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3.1.7 Lubrication Table

Pure Oil Mist

Oil Oil Bath and Purge Oil Mist Lubrication
Lubrication
Lubrication service Ball bearing
Mineral Oil Mineral Oil
Centrifugal Pump Lubrication

Type
(Petroleum Based) (Petroleum Based)
Ambient temperature -20 to 35 35 to 60 -5 to 60
°C (°F) (-4 to 95) (95 to 140) (23 to 140)
Oil temperature range* -5 to 65 up to 85 up to 100 15 and above
°C (°F) (23 to 149) (up to 185) (up to 212) (59 and above)
Viscosity
32 46 68 100
mm²/s 40°C [cSt]
First Oil Change 200 hours 200 hours 200 hours 200 hours
2000 hours or at least every 2000 hours or at least every 2000 hours or at least every 2000 hours or at least every
Further Oil Changes
6 months 6 months 6 months 6 months
Designation according to
32 46 68 100
DIN51502 ISO VG
BP Energol HL32 BP Energol HL46 BP Energol HL68
BP -
BP Energol HLP32 BP Energol HLP46 BP Energol HLP68
Hyspin AWS 32 Hyspin AWS 46 Hyspin AWS 68
CASTROL -
Perfecto T32** Perfecto T46** Perfecto T68

OMV OMV turb HTU 32** OMV turb HTU 46** OMV turb HTU 68 -

Aral Aral Vitam GF 32 Aral Vitam GF 46 Aral Vitam GF 68 -

Oil Companies and Lubricants

Esso NUTO H32 NUTO H46 NUTO H68 -

LSC LSO 32 LSO 46 LSO 68 LSO 100

(for oil m ist) Synthetic oil Synthetic oil Synthetic oil Synthetic oil
Mobil Nuto H32 Mobil Nuto H46 Mobil Nuto H68
Mobil Mobil DTE13M Mobil DTE15M Mobil DTE16M -
Mobil DTE24 Mobil DTE25 Mobil DTE26
Shell Tellus 32 Shell Tellus 46 Shell Tellus 68
Shell -
Shell Turbo T32** Shell Turbo T46** Shell Turbo T68

Texaco Rando HD 32 Rando HD 46 Rando HD 68 -

Total Azolla ZS32 Azolla ZS46 Azolla ZS68 -

Wintershall Wiolan HN32 Wiolan HN46 Wiolan HN68

-
(BASF Group) Wiolan HS32 Wiolan HS46 Wiolan HS68

* Note that it normally takes 2 hours for bearing temperature stabilize and the final temperature w ill depend on the ambient, r/min, pumpage temperature and pump
size. Viscosity index shall be at least 95.
** For ambient temperature from -12°C (10 °F) upw ar ds

For temperatures below -5 °C (-23 °F) use lubri cation oil class SAE 5W-50 or API-SJ.

Seal System / Pumped Liquid Quench-Oil General Features

- Raffinated Hydraulic Oil

- Synthetic Oil appr. 10-15 cST at 40°C
Barrier/Buffer Fluid for Tandem Seal to -40 °C (-40 °F) - Mixture of water / glykol (104 °F)
Mech. Seal Back to back Seal with gascoffer-dam
Conventional back to back Seal ATTENTION: below -40°C (-40 °F)
Do not use Methanol Pourpoint vaporization
above 80°C (176 °F)
Tandem Seal to -60°C (-76 °F) Ethanol/Propanol

The sequence of the suppliers of the lubricants does not represent any indication of their superiority.
¹ Viscosity at 40 °C (104 °F) in cSt [mm²/s] DIN 5 1562

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Never use air or compressed inert gas to clean

3.2 Operation clothes.
a) The bearing housing temperature shall not exceed Before working on the pump, take measures to
80 °C (176 °F). If higher bearing temperature is prevent an uncontrolled start. Put a warning board
observed, check the viscosity grade of the used on the starting device with the words:
lubrication oil. "Machine under repair: do not start".

With electric drive equipment, lock the main switch

The minimum viscosity is 10 open and withdraw any fuses. Put a warning board
cSt at the expected oil temperature. on the fuse box or main switch with the words:
"Machine under repair: do not connect".
(Oil temperature = bearing gland temperature +
10°C (18°F)) Never clean equipment with inflammable solvents or
carbon tetrachloride. Protect yourself against toxic
fumes when using cleaning agents.
4.0 MAINTENANCE
4.2 Maintenance schedule
4.1 General a) Check bearing lubricant level, and if the hours
run show a lubricant change is required.
It is the plant operator's responsibility to b) Check vibration, noise level and surface
ensure that all maintenance, inspection and temperature at the bearings to confirm
assembly work is carried out by authorized and satisfactory operation.
qualified personnel who have adequately familiarized c) Check dirt and dust is removed from areas
themselves with the subject matter by studying this around close clearances, bearing housings and
manual in detail. motors.
Our specialist service personnel can help with
Any work on the machine must be performed when it preventative maintenance.
is at a standstill. If any problems are found the following sequence of
actions should take place:
On completion of work all guards and safety devices
must be re-installed and made operative again. a) Ensure equipment complies with the
recommendations in this manual.
Oil and grease leaks may make the ground b) Contact Flowserve if the problem persists.
slippery. Machine maintenance must always
begin and finish by cleaning the ground and the 4.2.1 Routine Inspection (daily/weekly)
exterior of the machine.

If platforms, stairs and guard rails are required for The following checks should be
maintenance, they must be placed for easy access to made and the appropriate action taken to remedy any
areas where maintenance and inspection are to be deviations.
carried out. The positioning of these accessories a) Check operating behavior; ensure noise,
must not limit access or hinder the lifting of the part to vibration and bearing temperatures are normal.
be serviced.
When air or compressed inert gas is used in the 4.3 Spare parts
maintenance process, the operator and anyone in the
vicinity must be careful and have the appropriate
4.3.1 Storage of spares
protection.
Spares should be stored in a clean dry area away from
Do not spray air or compressed inert gas on skin. vibration. Inspection and retreatment of metallic
surfaces (if necessary) with preservative is
Do not direct an air or gas jet towards other people.
recommended at a 6 monthly interval.

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4.4 Recommended spares

Spares Recommended
Part Normal Maintenance
Bearings complete (antifriction, radial) 1
Bearings complete (antifriction, thrust) 1
Bearing pads only (hydrodynamic, thrust) 1
Gaskets, O-rings (set) 1

4.5 Fastener torques

Tightening torque MA Nm (lbf.ft)

Carbon Steel (NACE) Carbon Steel
Size of
(A 193 Gr.B7M, (A 193 Gr. B7,
screw
A 320 Gr. L7M) A 320 Gr. L7, 8.8)
M4 2,4 (1,8) 2,8 (2,1)
M5 4,8 (3,6) 5,6 (4,1)
M6 8,3 (6,1) 9,7 (7,1)
M8 19,8 (14,6) 23,1 (17)
M 10 39 (28,8) 45,4 (33,5)
M 12 67,8 (50) 78,8 (58,2)
M 14 107,5 (79,3) 125,1 (92,3)
M 16 164,5 (121,4) 191,4 (141,3)
M 18 230 (170) 267 (197)
M 20 321 (237) 373 (276)
M 22 431 (318) 502 (370)
M 24 553 (408) 644 (475)

Above mentioned torques are for all screwed unions, which works under dynamical load. For all other
connections you can use a corresponding smaller torque.

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4.6 Disassembly 4.7 Assembly

Ensure threads, gasket and O-ring mating faces are
4.6.1 Dismantling of the thrust bearing clean.

Thrust bearing No. Bearing size

4.7.1 Assembly of the thrust bearing
0N 7210 BECBJ
Thrust bearing No. Bearing size
1N 7313 BECBJ
0N 7210 BECBJ
3N 7315 BECBJ
1N 7313 BECBJ
4N 7317 BECBJ
3N 7315 BECBJ
5N 7318 BECBJ
4N 7317 BECBJ
6N 7322 BECBM
5N 7318 BECBJ
7N 7326 BCBM
6N 7322 BECBM
7232 BCBM
8N 7N 7326 BCBM
7330 BCBM
7232 BCBM
8N
7330 BCBM
4.6.1.1 Bearing housing 3N – 8N
1) Remove the bearing assembly consisting of the
4.7.1.1 Bearing housing 3N – 8N
thrust ball bearing [3013.1], bearing adaptor
sleeve [2471], spacer ring [2510] and the bearing 1) Heat up the first angular contact bearing, and put
lock nut [3712] as a cartridge. it on the bearing adaptor sleeve [2471] as shown
2) Open the bearing lock nut [3712] and pull off the in the section drawing.
thrust ball bearing [3013.1] 2) Install the spacer ring [2510]. Warm up the other
two bearings and install it according to the
4.6.1.2 Bearing housing 0N – 1N section drawing. Put on the lockwasher [6541] for
bearing nut and the bearing lock nut [3712]. After
1) Remove the bearing assembly consisting of the
tightening secure the bearing lock nut [3712] with
thrust ball bearing [3013.1], bearing adaptor
the lockwasher [6541] for bearing nut.
sleeve [2471] and the bearing lock nut [3712] as
a cartridge.
4.7.1.2 Bearing housing 0N – 1N
Open the bearing lock nut [3712] and pull off the
thrust ball bearing [3013.1]. 1) Heat up the two bearings and install it according
to the section drawing.
2) Put on the lockwasher [6541] for bearing nut and
the bearing lock nut [3712]. After tightening
secure the bearing lock nut [3712] with the
lockwasher [6541] for bearing nut.

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5.0 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM

⇓ Bearings have short life

PROBABLE CAUSES POSSIBLE REMEDIES
MECHANICAL TROUBLES
Shaft bent. Check shaft runouts within acceptable values
Rotating part rubbing on stationary part
Check for signs of this and consult Flowserve if necessary
internally.
Bearings worn Replace bearings
Shaft running off center because of worn Check misalignment and correct if necessary. If alignment satisfactory
bearings or misalignment. check bearings for excessive wear
Excessive grease in ball bearings. Check method of regreasing
Check hours run since last change of lubricant, the schedule and its
Lack of lubrication for bearings.
basis
Check method of assembly, possible damage or state of cleanliness
Improper installation of bearings
during assembly and type of bearing used
Damaged bearings due to contamination. Check contamination source and replace damaged bearings
ELECTRICAL TROUBLES
Motor running too slow, Check motor terminal box connections

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

6.0 PARTS LIST AND DRAWINGS

6.1 Assembly 0N-1N

For 2 pole speed the bearing assembly is delivered with axial fan. No cowl is required.

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

6.2 Assembly 3N-7N

The standard design is delivered with radial fan. For that design a cowl is necessary. For special
customer requirements (e.g. temperature limits below the API 610 limits) axial fan may be installed that do not
require cowl.

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

6.3 Assembly 8N

The standard design is delivered with radial fan. For that design a cowl is necessary. For special
customer requirements (e.g. temperature limits below the API 610 limits) axial fan may be installed that do not
require cowl.

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

7.0 CERTIFICATION
Certificates determined from the contract
requirements are provided with these instructions
where applicable. Examples are certificates for CE
marking, ATEX marking etc. If required, copies of
other certificates sent separately to the Purchaser
should be obtained from the Purchaser for retention
with these User Instructions.

8.0 OTHER RELEVANT

DOCUMENTATION AND MANUALS

8.1 Supplementary user instructions

Supplementary instructions determined from the
contract requirements for inclusion into user
Instructions such as for a driver, instrumentation,
controller, sub-driver, seals, sealant system, mounting
component etc are included in the Data Book. If
further copies of these are required they should be
obtained from the supplier for retention with these
user instructions.

Where any pre-printed set of user instructions are

used, and satisfactory quality can be maintained only
by avoiding copying these, they are included at the
end of these user instructions such as within a
standard clear polymer software protection envelope.

8.2 Change notes

If any changes, agreed with Flowserve, are made to
the product after its supply, a record of the details
should be maintained with these User Instructions.

8.3 Additional sources of information

Reference 1:
NPSH for Rotordynamic Pumps: a reference guide,
Europump Guide No. 1, Europump & World Pumps,
Elsevier Science, United Kingdom, 1999.

Reference 2:
nd
Pump Handbook, 2 edition, Igor J. Karassik et al,
McGraw-Hill Inc., New York, 1993.

Reference 3:
ANSI/HI 1.1-1.5
Centrifugal Pumps - Nomenclature, Definitions,
Application and Operation.

Reference 4:
ANSI B31.3 - Process Piping.

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

8.4 Abbreviations

ISO unit Multiplication US unit

Quantity ISO unit US unit
abbreviation Factor 1 Abbreviation

square meter m² 10.764 square feet ft²

Area
square centimeter cm² 0.155 square inch in.²

Capacity or Cubic US Gallons/

m³/h 4.4033 US gpm
Flow rate meter/hour minute

Force Newton N 0.2248 Pound force lbf

Head meter m 3.28084 feet ft

British
Heat Energy kilo joule kJ 0.9478 Btu
thermal unit
meter m 3.28084 feet ft
Length millimeter mm 0.03937 inch in.
micrometer µm 0.00003937 inch in.

kilogram kg 2.20462 pounds lb.

Mass
gram g 0.035274 ounces oz.

Moment of kilogram pounds

kg.m² 23.73 lb.ft²
Inertia square meter square feet

Noise 4 decibel dBA

Power kilowatt kW 1.34102 horsepower hp

Pressure 2 bar bar 14.5 pounds/in.² psi

Rotational
revs per minute r/min
Speed
Newton/square
Stress N/mm² 145.0 pounds/in.² psi
millimetre
degrees degrees
Temperature °C (1.8 x °C) + 32 °F
Celsius Fahrenheit

Torque Newton meter Nm 0.7376 pound.feet lbf.ft

Unbalance gram millimeter g.mm 0.001389 ounce-inch oz-in.

meter/second m/s 3.28084 feet/second ft/sec

Velocity
millimeter/second mm/s 0.03937 inches/second in./sec

millimetre/ inches/
Vibration 3
second mm/s 0.03937 second in./sec

Viscosity square millimetre/

cSt
second or centiStoke

cubic meter m³ 264.2 US Gallons US gal.

Volume
liter l 33.81 fluid ounce Fl.oz.

1
multiply the ISO unit by the multiplication factor to obtain US units
2
where pressure is not stated to be absolute it is gauge
3
where not stated to be peak it is r.m.s.
4
sound pressure level LpA, re 1m - 20microPa, or sound power level LwA re 1 pW when sound power is
applicable

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 N-SERIES OF THRUST POT USER INSTRUCTIONS ENGLISH 07/14

AFTERMARKET DIRECTORY
OUR ADRESS
Flowserve (Austria) GmbH Tel: +43 / 2236 / 31530
Industriestraße B/6 Fax: +43 / 2236 / 33430
A-2345 Brunn/Geb., AUSTRIA Mail: flowserve-brunn@flowserve.com

MESSAGES CAN BE LEFT ALSO ON OUR ANSWERING MACHINE

IMPORTANT NOTES:

PLEASE NOTE, THAT WARRANTY EXPIRES:

- USE OF NON GENUINE FLOWSERVE AUSTRIA PARTS FOR MAINTENANCE AND REPAIRS
- NO USE OF OUR SERVICE PERSONAL IN CASE OF REPAIRS DURING WARRANTY PERIOD

RECOMMENDATION:
-PLEASE ASK FOR OUR SPECIAL RATES
- PLEASE ALSO ASK OUR SERVICE PERSONAL ABOUT REPAIRING AND SERVICING YOUR
PUMPS AFTER THE WARRANTY PERIOD

Please quote your service:

Name of Company: ………………………… Pumpdata:
Contact person:.……………………….. Type: ………………….
Telephone: …………….…………........... Serialno.: …….......…….....
Fax: ...…………………………………....
e-mail: ………………………………………
Country: ………………………………………

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FLOWSERVE REGIONAL
Your Flowserve factory contacts: SALES OFFICES:

Flowserve (Austria) GmbH USA and Canada

Industriestraße B6 Flowserve Corporation
2345 Brunn am Gebirge 5215 North O’Connor Blvd.
Austria
Suite 2300
Irving, Texas 75039-5421, USA
Telefon: +43 2236 31530
Telephone: +1 937 890 5839
Fax: +43 2236 33430
E.mail: flowserve-brunn@flowserve.com
Europe, Middle East, Africa
Flowserve Corporation
Parallelweg 13
4878 AH Etten-Leur
The Netherlands
Telephone: +31 76 502 8100

Latin America
Flowserve Corporation
Martín Rodriguez 4460
B1644CGN-Victoria-San
Fernando
Buenos Aires, Argentina
Telephone: +54 11 4006 8700
Telefax: +54 11 4714 1610

Asia Pacific
Flowserve Pte. Ltd.
10 Tuas Loop
Singapore 637345
Telephone: +65 6771 0600
Telefax: +65 6862 2329