Flowserve ERPN-M User Manual

USER INSTRUCTIONS

ERPN-M centrifugal pumps

Installation

Operation

Horizontal, End Suction Magnetic Driven

PCN=71569270, 71569272, 71569273 02-08 (E)
Original Instructions

Maintenance

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Type: ERPN-M
Size:
Serial No: G208xxx
Customer:
Customer Order No.:
Equipment/ Item No.:
Pumped Liquid:
Capacity: m³/h
Minimum Capacity: m³/h
Head: mFs
Speed: U/min

-1

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

CONTENTS

PAGE

1.0 INTRODUCTION AND SAFETY............................4

1.1 GENERAL.................................................................4

1.2 CE MARKING AND APPROVALS................................4

1.3 DISCLAIMER.............................................................4

1.4 COPYRIGHT .............................................................4

1.5 DUTY CONDITIONS...................................................4

1.6 SAFETY....................................................................5

1.7 WARNING LABEL......................................................9

1.8 SPECIFIC MACHINE PERFORMANCE.......................10

1.9 NOISE LEVEL.......................................................... 10

2.0 TRANSPORT AND STORAGE............................12

2.1 CONSIGNMENT RECEIPT AND UNPACKING............. 12

2.2 HANDLING..............................................................12

2.3 LIFTING .................................................................. 12

2.4 STORAGE...............................................................13

2.5 RECYCLING AND END OF PRODUCT LIFE ...............13

3.0 DESCRIPTION........................................................13

3.1 CONFIGURATION....................................................13

3.2 NOMENCLATURE.................................................... 13

3.3 DESIGN OF MAJOR PARTS ..................................... 13

3.4 PERFORMANCE AND OPERATING LIMITS ...............14

7.0 AUXILIARIES.......................................................... 30

8.0 FAULTS; CAUSES AND REMEDIES .................32

9.0 CERTIFICATION.................................................... 33

10.0 OTHER RELEVANT DOCUMENTATION AND

MANUALS...................................................................... 33

7.1 SECONDARY SEAL................................................. 30

7.2 CHANGING OF SECONDARY SEAL.......................... 30

7.3 SEAL AND SEAL SYSTEMS .....................................30

10.1 SUPPLEMENTARY USER INSTRUCTIONS.............. 33

10.2 CHANGE NOTES................................................... 33

10.3 ADDITIONAL SOURCES OF INFORMATION............ 34

10.4 ABBREVIATIONS ..................................................35

4.0 INSTALLATION ......................................................14

4.1 LOCATION .............................................................. 14

4.2 PART ASSEMBLIES ................................................14

4.3 FOUNDATION .........................................................14

4.4 INITIAL ALIGNMENT ................................................15

4.5 PIPING....................................................................16

4.6 ELECTRICAL CONNECTIONS ..................................16

4.7 FINAL SHAFT ALIGNMENT CHECK...........................16

5.0 COMMISSIONING START-UP, OPERATION

AND SHUTDOWN........................................................ 16

5.1 PRECOMMISSIONING PROCEDURE ........................ 17

5.2 PUMP LUBRICANTS................................................17

5.3 IMPELLER CLEARANCE........................................... 22

5.4 DIRECTION OF ROTATION ......................................22

5.5 GUARDING.............................................................22

5.6 PRIMING AND AUXILIARY SUPPLIES ....................... 22

5.7 STARTING THE PUMP............................................. 22

5.8 OPERATION............................................................22

5.9 STOPPING AND SHUTDOWN .................................. 22

5.10 HYDRAULIC, MECHANICAL AND ELECTRICAL DUTY

.....................................................................................23

6.0 MAINTENANCE...................................................... 23

6.1 GENERAL...............................................................23

6.2 MAINTENANCE SCHEDULE..................................... 24

6.3 SPARE PARTS........................................................24

6.4 RECOMMENDED SPARES....................................... 26

6.5 FASTENER TORQUES.............................................26

6.6 SETTING IMPELLER CLEARANCE............................27

6.7 DISASSEMBLY........................................................27

6.8 EXAMINATION OF PARTS........................................ 28

6.9 ASSEMBLY ............................................................. 29

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ERPN-M USER INSTRUCTIONS ENGLISH 02-08

1.3 Disclaimer

1.0 INTRODUCTION AND SAFETY

1.1 General

These Instructions must always be kept

close to product's operating location or directly
with the product.

Flowserve's products are designed, developed and
manufactured with state-of-the-art technologies in
modern facilities. The unit is produced with great care
and commitment to continuous quality control,
utilising sophisticated quality techniques, and safety
requirements.
Flowserve is committed to continuous quality
improvement and being at service for any further
information about the product in its installation and
operation or about its support products, repair and
diagnostic services.
These instructions are intended to facilitate
familiarization with the product and its permitted use.
Operating the product in compliance with these
instructions is important to help ensure reliability in
service and avoid risks. The instructions may not take
into account local regulations; ensure such
regulations are observed by all, including those
installing the product. Always coordinate repair
activity with operations personnel, and follow all plant
safety requirements and applicable safety and health
laws/regulations.

Information in these User Instructions is believed
to be reliable. In spite of all the efforts of
Flowserve Pump Division to provide sound and
all necessary information the content of this
manual may appear insufficient and is not
guaranteed by Flowserve as to its completeness
or accuracy.

Flowserve manufactures products to exacting
International Quality Management System Standards
as certified and audited by external Quality
Assurance organisations. Genuine parts and
accessories have been designed, tested and
incorporated into the products to help ensure their
continued product quality and performance in use. As
Flowserve cannot test parts and accessories sourced
from other vendors the incorrect incorporation of such
parts and accessories may adversely affect the
performance and safety features of the products. The
failure to properly select, install or use authorised
Flowserve parts and accessories is considered to be
misuse. Damage or failure caused by misuse is not
covered by Flowserve's warranty. In addition, any
modification of Flowserve products or removal of
original components may impair the safety of these
products in their use.

1.4 Copyright

All rights reserved. No part of these instructions may
be reproduced, stored in a retrieval system or
transmitted in any form or by any means without prior
permission of Flowserve Pump Division.

These instructions should be read

prior to installing, operating, using and
maintaining the equipment in any region
worldwide. The equipment must not be put into
service until all the conditions relating to safety
noted in the instructions have been met.

1.2 CE marking and approvals

It is a legal requirement that machinery and
equipment put into service within certain regions of
the world shall conform with the applicable CE
Marking Directives covering Machinery and, where
applicable, Low Voltage Equipment, Electromagnetic
Compatibility (EMC), Pressure Equipment Directive
(PED) and Equipment for Potentially Explosive
Atmospheres (ATEX).
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
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
Certification.

1.5 Duty conditions

This product has been selected to meet the
specifications of your purchaser order. The
acknowledgement of these conditions has been sent
separately to the Purchaser. A copy should be kept
with these instructions.

The product must not be operated beyond
the parameters specified for the application. If
there is any doubt as to the suitability of the
product for the application intended, contact
Flowserve for advice, quoting the serial number.

If the conditions of service on your purchase order
are going to be changed (for example liquid pumped,
temperature or duty) it is requested that the user
seeks Flowserve´s written agreement before start up.

Page 4 von 37

1.6 Safety

1.6.1 Summary of safety markings

These user instructions contain specific safety
markings where non-observance of an instruction
would cause hazards. The specific safety markin gs
are:

This symbol indicates electrical safety instructions
where non-compliance will involve a high risk to
personal safety or the loss of life.

This symbol indicates safety instructions

where non-compliance would affect personal safety
and could result in loss of life.

This symbol indicates "hazardous and toxic

fluid" safety instructions where non-compliance would
affect personal safety and could result in loss of life.

This symbol indicates safety
instructions where non-compliance will involve some
risk to safe operation and personal safety and would
damage the equipment or property.

This symbol indicates "strong magnetic
field" safety instructions where non-compliance would
affect personal safety, pacemakers, instruments or
stored data sensitive to magnetic fields.

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

1.6.2 Personnel qualification and training

All personnel involved in the operation, installation,
inspection and maintenance of the unit must be
qualified to carry out the work involved. If the
personnel in question do not already possess the
necessary knowledge and skill, appropriate training
and instruction must be provided. If required the
operator may commission the manufacturer / supplier
to provide applicable training.
Always co-ordinate repair activity with operations and
health and safety personnel, and follow all plant
safety requirements and applicable safety and health
laws/regulations.

1.6.3 Safety action

This is a summary of conditions and actions to
help prevent injury to personnel and damage to
the environment and to equipment. For products
used in potentially explosive atmospheres
section 1.6.4 also applies.

PREVENT EXCESSIVE
EXTERNAL PIPE LOAD
Do not use pump as a support for piping. Do not
mount expansion joints so that their force, due to
internal pressure, acts on the pump flange.

ONLY CHECK DIRECTION OF
MOTOR ROTATION WITH COUPLING ELEMENT/
PINS REMOVED
Starting in reverse direction of rotation will damage
the pump.

This symbol indicates explosive atmosphere

marking according to ATEX. It is used in safety
instructions where non-compliance in the hazardous
area would cause the risk of an explosion.

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
instructions where non-compliance in the hazardous
area would cause the risk of an explosion.

The sign is not a safety symbol but
indicates an important instruction in the assembly
process.

This symbol indicates potential risks

connected with extremely high temperatures.

This symbol indicates potential risks

connected with extremely low temperatures.

ENSURE CORRECT
LUBRICATION
(See section 5 Commissioning, startup, operation and
shutdown.)

START THE PUMP WITH
OUTLET VALVE PART OPENED
(Unless otherwise instructed at a specific point in the
user instructions.)
This is recommended to avoid the risk of overloading
and damaging the pump motor at full or zero flow.
Pumps may be started with the valve further open
only on installations where this situation cannot
occur. Pump outlet valve shall be adjusted to comply
with the duty following the run-up process (See
section 5 Commissioning, startup, operation and
shutdown).

START THE PUMP WITH
OUTLET VALVE FULLY OPEN
This is recommended to avoid the risk of overloading
and damaging the pump motor where greater power
is taken at low or shut off flow. Pump outlet valve
shall be adjusted to comply with the duty following the

Page 5 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

run-up process (See section 5 Commissioning,
startup, operation and shutdown).

NEVER RUN THE PUMP DRY

INLET VALVES TO BE FULLY
OPEN WHEN PUMP IS RUNNING
Running the pump at zero flow or below the
recommended minimum flow continuously will cause
damage to the magnets and/or bearings.

INLET VALVES TO BE FULLY
OPEN WHEN PUMP IS RUNNING
Running the pump at zero flow or below the
recommended minimum flow continuously will cause
damage to the seal.

DO NOT RUN THE PUMP AT
ABNORMALLY HIGH OR LOW FLOW RATES
Operating at a flow rate higher than normal or at a
flow rate with no back pressure on the pump may
overload the motor and cause cavitation. Low flow
rates may cause a reduction in
overheating of the pump, instability and
cavitation/vibration.

When ambient temperatures are
likely to drop below freezing point, the pump and any
cooling and flushing arrangements must be drained
or otherwise protected.

pump/bearing life,

NEVER DO MAINTENANCE WORK WHILST THE
UNIT IS CONNECTED TO POWER

HAZARDOUS LIQUIDS

When the pump is handling hazardous liquids care
must be taken to avoid exposure to the liquid by
appropriate sitting of the pump, limiting personnel
access and by operator training. If the liquid is
flammable and/or explosive strict safety procedures
must be applied.

Gland Packing must not be used when pumping
hazardous liquids.

DRAIN PUMP AND ISOLATE PIPEWORK

BEFORE DISMANTLING THE PUMP
The appropriate safety precautions should be taken
where the pumped liquids are hazardous.

FLUORO-ELASTOMERS (When fitted)

When a pump has experienced temperatures over
250 °C (482 ºF), partial decomposition of fluoro­elastomers (example: Viton) will occur . In this
condition these are extremely dangerous and skin
contact must be avoided.

GUARDS MUST NOT BE REMOVED WHILE

PUMP IS OPERATIONAL

THERMAL SHOCK

Rapid changes in the temperature of the liquid within
the pump can cause thermal shock, which can result
in damage or breakage of components and should b e
avoided.

HIGH MAGNETIC FIELDS
Persons working with permanent parts must be made
aware that there is a potential danger from magnetic
fields e.g. influence on heart pacemakers, credit
cards, computers, computer tapes/discs and
watches.
Great care must be taken when working with or
assembling/ dismantling magnetic rotors because of
the very high forces which can be created by the
magnets.
When shipping raw or bare magnet assemblies,
especially by air, special precautions may be
necessary.

HANDLING COMPONENTS

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
corresponding to the mass and in accordance with
current local regulations.

NEVER APPL Y HEAT TO REMOVE

IMPELLER
Trapped lubricant or vapour could cause an
explosion.

HOT AND COLD PARTS

If hot or freezing components or auxiliary heating
supplies can present a danger to operators, they
must

be shielded to avoid accidental contact. If

complete protection is not possible, the machine
access must be limited to maintenance staff only.
Note: bearing housings must not be insulated and
drive motors and bearings may be hot.

If the temperature is greater than 68 °C (175 °F) or
below 5 °C (20 °F) in a restricted zone, or exceeds
local regulations, action as above shall be taken.

1.6.4 Products used in potentially explosive
atmospheres

Measures are required to:

• Avoid excess temperature

Page 6 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

• Prevent build up of explosive mixtures

• Prevent the generation of sparks

• Prevent leakages

• Maintain the pump to avoid hazard

The following instructions for pumps and pump units
when installed in potentially explosive atmospheres
must be followed to help ensure explosion protection.
Both electrical and non-electrical equipment must
meet the requirements of European Directive
94/9/EC.

1.6.4.1 Scope of compliance

Use equipment only in the zone for which it is
appropriate. Always check that the driver, drive
coupling assembly, seal and pump equipment are
suitably rated and/or certified for the classification of
the specific atmosphere in which they are to be
installed.

Where Flowserve has supplied only the bare shaft
pump, the Ex rating applies only to the pump. The
party responsible for assembling the pump set shall
select the coupling, driver and any additional
equipment, with the necessary CE Certificate/
Declaration of Conformity establishing it is suitable for
the area in which it is to be installed.

The output from a variable frequency drive (VFD) can
cause additional heating affects in the motor and so,
for pump sets with a VFD, the ATEX Certification for
the motor must state that it covers the situation where
electrical supply is from the VFD. This is particular
requirement still applies even if the VFD is in a safe
area.

1.6.4.2 Marking

An example of ATEX equipment marking is shown
below. The actual classification of the pump will be
engraved on the nameplate.

II 2 GD c IIC135ºC (T4)

Equipment Group
I = Mining
II = Non-mining

Category
2 or M2 = High level protection
3 = normal level of protection

Gas and/or Dust
G = Gas; D= Dust

c = Constructional safety
(in accordance with En13463-5)

Gas Group (Equipment Category 2 only)

IIA – Propane (Typical)
IIB – Ethylene (Typical)
IIC – Hydrogen (T y pical)

Maximum surface temperature (Tempe rature Class)
(see section 1.6.4.3)

1.6.4.3 Avoiding excessive surface temperatures

ENSURE THE EQUIPMENT TEMPERATURE

CLASS IS SUITABLE FOR THE HAZARD ZONE
Pumps have a temperature class as stated in the

ATEX Ex rating on the nameplate. These are based
on a maximum ambient of 40 °C (104 °F); refer to
Flowserve for higher ambient temperatures.

The surface temperature on the pump is influenced
by the temperature of the liquid handled. The
maximum permissible liquid temperature depends on
the temperature class and must not exceed the
values in the table that follows. The temperature rise
at the seals and bearings and due to the minimum
permitted flow rate is taken into account in the
temperatures stated.

Temperature limit of liquid

handled (* depending on

material and construction

variant - check which is

lower)

Consult Flowserve
Consult Flowserve

110 °C (230 °F) *
175 °C (347 °F) *
270 °C (518 °F) *
350 °C (662 °F) *

Temperature

class to

EN 13463-1

T6
T5
T4
T3
T2
T1

Maximum

surface

temperature

permitted

85 °C (185 °F)

100 °C(212 °F)
135 °C (275 °F)
200 °C (392 °F)
300 °C (572 °F)
450 °C (842 °F)

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 when the pump is
required to be used in differently classified potentially
explosive atmospheres. In this case the user is
responsible for ensuring that the pump surface
temperature does not exceed that permitted in its
actual installed location.

Do not attempt to check the direction of rotation with
the coupling element/pins fitted due to the risk of
severe 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 it is recommended that
users fit an external surface temperature protection
device.

Page 7 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Avoid mechanical, hydraulic or electrical overload by
using motor overload trips or a Power Monitor and
make routine vibration monitoring.
In dirty or dusty environments, regular checks must
be made and dirt removed from areas around close
clearances, bearing housings and motors.

1.6.4.4 Additional requirements for pumps with
magnetic drive

It is recommended for users to fit a temperature
monitor in the magnetic drive bearing/shell area when
pumping liquids with solids content or liquids that can
polymerize or freeze.

In unmanned locations where a magnetic drive is
used it is advisable to fit a vibration monitor.

1.6.4.5 Preventing the build up of explosive
mixtures

ENSURE THE PUMP IS PROPERLY FILLED

AND VENTED AND DOES NOT RUN DRY
Ensure the pump and relevant suction and discharge

pipeline system is totally filled with liquid at all times
during the pump operation, so that an explosive
atmosphere is prevented. In addition it is essential to
make sure that seal chambers, auxiliary shaft seal
systems and any heating and cooling systems are
properly filled.

If the operation of the system cannot avoid this
condition the fitting of an appropriate Dry Run
protection device is recommended (eg liquid
detection or a Power Monitor).

To avoid potential hazards from fugitive emissions of
vapour or gas to atmosphere the surrounding area
must be well ventilated.

1.6.4.6 Preventing sparks

To prevent a potential hazard from mechanical
contact the coupling guard must be non-sparking and
anti-static.

To avoid the potential hazard from random induced
current generating a spark the earth contact on the
baseplate must be used.

Avoid electrostatic charge: do not rub non­metallic surfaces with a dry cloth; ensure cloth is
damp.

The coupling must be selected to comply with
94/9/EC and correct alignment must be maintained.

1.6.4.7 Preventing leakage

The pump must only be used to handle liquids
for which it has been approved to have the correct
corrosion resistance.

Avoid entrapment of liquid in the pump and
associated piping due to closing of suction and
discharge valves, which could cause dangerous
excessive pressures to occur if there is heat input to
the liquid. This can occur if the pump is stationary or
running.

Bursting of liquid containing parts due to freezing
must be avoided by draining or protecting the pump
and ancillary systems.

If leakage of liquid to atmosphere can result in a
hazard, the installation of a liquid detection device is
recommended.

1.6.4.8 Additional requirements for pumps with
magnetic drive

If protection greater than Categories 2 and M2 is
required, then liquid detection should be provided in
the bearing housing/support head.

1.6.4.9 Maintenance to the centrifugal pump 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
adversely affect the ambient conditions. Where there
is a risk from such tools or materials, maintenance
must be conducted in a safe area.
It is recommended that a maintenance plan and
schedule is adopted (see section 6, Maintenance).to
include the following.

a) Any auxiliary systems installed must be

monitored, if necessary, to ensure they function
correctly.

b) Check for any leaks from gaskets and seals. The

correct functioning of the magnetic coupling must
be checked regularly

c) Check bearing lubricant level, and if the hours run

show a lubricant change is required.

d) Check that the duty condition is in the safe

operating range for the pump.

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ERPN-M USER INSTRUCTIONS ENGLISH 02-08

e) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

f) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

g) Check coupling alignment and re-align if

necessary.

1.7 Warning label

Page 9 of 37

1.8 Specific machine performance

For performance parameters see section 1.5, Duty
conditions. When the Contract requirement specifies

these to be incorporated into user instructions these
are included here. Where performance data has been
supplied separately to the purchaser these should be
obtained and retained with these user instructions if
required.

1.9 Noise level

When pump noise level exceeds 85 dBA attention
must be given to prevailing Health and Safety
Legislation, to limit the exposure of plant operating
personnel to the noise. The usual approach is to
control exposure time to the noise or to enclose the
machine to reduce emitted sound. You may have
already specified a limiting noise level when the
equipment was ordered, however if no noise
requirements were defined then machines above a
certain power level will exceed 85 dBA.
In such situations consideration must be given to the
fitting of an acoustic enclosure.
Pump noise level is dependent on a number of
factors - the type of motor fitted, the operating
capacity, pipework design and acoustic
characteristics of the building. The levels specified in
the table below are based on measurement s
according to EN ISO 3744 for pumps only and not
guaranteed.
The dBA values are ba sed on the pump only. To
consider the noise of the driver, follow the guidelines
on the attached data sheet. For driver noise levels
refer to driver manufactures instruction. They are
Sound Pressure levels at 1 m (3.3 ft) from the directly
driven pump, for "free field over a reflecting plane".
If a pump only has been purchased, for fitting with
your own driver, then the "pump only" noise levels
from the table should be combined with the level for
the driver obtained from the supplier. Consult a Noise
Specialist for this calculation.

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

For units driven by equipment other than

electric motors or units contained within enclosures,
see the accompanying information sheets and
manuals.

Page 10 of 37

A

t

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Octave MID_BAND Frequency, HZ

Power BHP Power Kw. dB(A) Value 63 125 250 500 1K 2K 4K 8K

3 2.2 67 54 58 58 56 56 56 54 59

3.7 2.7 68 58 62 62 60 60 60 58 53

4.7 3.5 69 59 63 63 61 61 61 59 54
6 4.4 70 64 64 62 62 60 55 50 50

7.6 5.6 71 61 65 65 63 63 63 61 56

9.4 6.9 72 62 66 66 64 64 64 62 57

12 8.8 73 67 67 65 65 63 58 53 53
15 11.0 74 68 68 66 66 64 59 54 54
19 14.0 75 69 69 67 67 65 60 55 55
24 17.6 76 70 70 68 68 66 61 56 56
31 22.8 77 67 71 71 69 69 69 67 62
39 28.7 78 68 72 72 70 70 70 68 63
49 36.0 79 69 73 73 71 71 71 69 64
62 45.6 80 70 74 74 72 72 72 70 65
77 56.6 81 71 75 75 73 73 73 71 66

95 69.9 82 75 75 73 73 71 66 61 61
115 84.6 83 77 77 75 75 73 68 63 63
145 106.6 84 78 78 76 76 74 69 64 64
190 139.7 85 79 79 77 77 75 70 65 65
250 183.8 86 80 80 78 78 76 71 66 66
350 257.4 87 81 81 79 79 77 72 67 67
500 367.6 88 78 82 82 80 80 80 78 73
700 514.7 89 79 83 83 81 81 81 79 74
940 691.2 90 80 84 84 82 82 82 80 75

1100 808.8 91 81 85 85 83 83 83 81 76

Sound pressure readings are for information only and are not subject to guarantee by Flowserve.
Decibel readings do not include driver or system noise.
Pump tested at 100% of the best efficiency point at max.impeller diameter with water.

dB correc t ion for combining nois es (pum p+motor)

Difference betw een t wo
levels to be combined, dB

dd to the hig her lev el to obtain

No te :

1) The v alues showed are measure d at a distanc e of 1 mt. (horiz ont ally ) from m ajor pum p
surfa ces and 1. 5 mt . abo ve the floor.

2) The values sh own are expressed in dB.

3) For N ois e Tes t Proce dur e ref er to Work s St andard L -109-0

4) The v alues shown have b een derive d from ac tua l noise-test data and are based on the foll owin g con dit ion s :

the combi ned nois e l eve l,dB

- Equipment is located in a fre e field above a refl ec tin g plane in whic h t he reduc t io nin nois e lev el

in all direc t ions is 6db in eac h octave band fo r each dou bling of distanc e.

-

Background noise is 10dB minimum below all noise levels in each octave band.

-

T he val ues show n are at a dis

1,5 mete rs abov e the floor, usi ng a standar d pressure ref erenc e of 0,00002 new ton per squa re meter.

- Ov erall noise level, dB(A) is determ ined a t point s of max im um nois e l evel and the values o f all

mid-band frequences are basis A scale readings.

a nce of 1 meter (horiz ontally ) from the ma j or pum p surfac e and

0 1 2

3 2.5 2 1.5

6 9 10
1 0.5 0

When the requi red condit ion flow is outside the range of 75 to 1 25% BEP, a part load corre ction (PLC ) m ust be
ad ded to the nois e lev el as fo llow s:

Percent of BEP @ required

impeller diamet er

74 to 62 or 126 to 136

61 to 50 or 137 to 150 +2
49 to 38

+1

PL C in

dB

+3
+4 37 to 25

Page 1 1 of 3 7

2.0 TRANSPORT AND STORAGE

2.1 Consignment receipt and unpacking

Immediately after receipt of the equipment it must be
checked against the delivery/ shipping documents for
its completeness and that there has been no damage
in transportation. Any shortage and or damage must
be reported immediately to the Flowserve Pump
Division and received in writing within one month of
receipt of the equipment. Latter claims cannot be
accepted.
Check any create/boxes/wrappings for any
accessories or spare parts, which 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.

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

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

Four lifting lugs are provided on the baseplate to lift
the complete unit.

Take care by applying slings or ropes about

auxiliary piping and seal systems.

Bare pumps shall be lifted as shown below.

Page 12 of 37

A crane must be used for all pump sets in
excess of 25kg (55lb). Fully trained personnel must
carry out lifting, in accordance with local regulations.
The driver and pump weights are recorded on their
respective nameplates.

2.4 Storage

If the unit will not be put immediately into service, it
should be stored in a dry room. To avoid any damage
during the storage period, the influence of any low or
high frequency vibration must be totally inhibited. If
the pump is delivered sealed in a plastic-wrapper, it is
of max. importance to avoid any damage of that
wrapper, because this will protect the pump against
humidity. Therefore it must be checked if this wrapper
has become cracked and if so, the wrapper must be
renewed.

2.4.1 Long period storage

If the pump is delivered in a plastic bag, the
preservations stands up for one year. If the storage
period exceeds this time, the preservation must be
checked and renewed. Also the air tight plastic bag
must be changed. Moreover we recommend to order
a Flowserve Service Engineer for checking the pump
before the first start up.

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 regulations. If the
product contains substances, which 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 in the
"seal system" or other utilities.

Make sure that hazardous substances are

disposed of safety and that the correct personal
protective equipment is used. The safety
specifications must be in accordance with the current
regulations at all times.

3.0 DESCRIPTION

3.1 Configuration

The model ERPN-M belongs to Flowserves family of
API 685 magnetic driven end suction pumps.
The pump line is based on a modular system, thus
providing maximum design and operating flexibility.
The pump is available with several impeller designs.

• closed impeller with front and back wear rings.

Above a certain size the axial thrust is balanced
by balancing holes.

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

• semi open impeller with back vanes for abrasive
fluids

• free flow (recessed) impeller for fluids containing
fibre

All three impeller versions can be combined with an
inducer for low NPSHA applications.
For high suction pressure applications the balance
holes are seized individually to ensure a trouble-free
operation.

The sense of rotation of the pump is

clockwise (CW), looking from the coupling to the shaft
end of the pump.

3.2 Nomenclature

Example:
ERPN-M 150-200 – X-Ind.

150 Discharge nozzle in mm
200 max. impeller size in mm
Ind Inducer
X: S high suction pressure

O semi open impeller
F free flow impeller

3.3 Design of major parts

3.3.1 Bearing housing

Made of carbon steel. It is flanged to the pump casing
and provides enough space for mechanical seals
according to API 682.

3.3.2 Pump casing

The pump casing is of volute type. For larger sizes
double volute design is used to minimize radial
forces. Back pull out design for easy maintenance, so
the casing remains on its foundation in case of repair.

3.3.3 Hydraulics

3.3.3.1 Closed impeller

This is the standard version. Both, the impeller and
pump casing have renewable front and back wear
rings. Above a certain impeller size, the axial thrust is
balanced by balancing holes.

3.3.3.2 Free flow impeller

The impeller has straight radial vanes and is mounted
recessed in the pump casing. The axial thrust is
balanced by back vanes.

Page 13 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

3.3.3.3 Semi open impeller

The pump casing is equipped with a renewable wear
plate.The axial thrust is balanced by back vanes.

3.3.3.4 Inducer

All different impellers can be optionally equipped with
an inducer for low NPSHA applications.

3.3.4 Magnetic Coupling

The magnetic coupling consists of:
a) The Can:

This is the actual sealing element of the magnetic
coupling. The driving torque is transmitted via the
can due to the magnetic field between the inner
and outer rotors.

b) Outer Rotor:

The outer rotor driven by the pump shaft and
holds the set of magnets needed to meet the
torque requirement.

c) Inner Rotor:

The inner rotor drives the impeller. Fluid
lubricated Silicon Carbide bearings take all the
hydraulic forces.

d) Secondary Seal:

As required by API 685 a secondary seal is used
to avoid leakage to the atmosphere in case of
magnetic coupling failure.

e) Temperature Sensor:

It observes the temperature at the Can surface to
ensure that the Silicon Carbide bearings are
flushed properly.

3.4 Performance and operating limits

In the interest of operator safety
the unit must not be operated above the nameplate
conditions. Such operation could result in unit failure
causing injury to operating personnel. Consult
instruction book for correct operation and
maintenance of the pump and its supporting
components.

4.0 INSTALLATION

Equipment operated in hazardous locations
must comply with the relevant explosion protection
regulations, see section 1.6.4, Products used in

potentially explosive atmospheres.

4.1 Location

The pump should be located to allow room for
access, ventilation, maintenance and inspection with
ample headroom for lifting and should be as close as
practicable to the supply of liquid to be pumped.

Refer to the general arrangement drawing for the
pump set.

4.2 Part Assemblies

The pumps are delivered completely mounted and
prealigned with the motor. Also the shaft seal is in the
correct position. Final alignment after complete
installation is necessary. If drivers and/or seal systems
are delivered separately, follow the assembly
procedure in section 6.8.

4.3 Foundation

The foundation shall be located on a place that allows
a minimum of pipe work and that is easily accessible
for inspection during operation. According to the
environment the foundation may consist of concrete
or of steel. It must be rigid and heavy enough to
absorb normal vibrations and shocks.

4.3.1 Horizontal alignment of the baseplate

Horizontal alignment is done with levelling screws.
Use a spirit level for correct horizontal alignment of
the baseplate.

The max. misalignment is 0.5 mm/m

baseplate length.

4.3.2 Steel foundation

When the pump unit is mounted directly on structural
steel frame, it shall be well supported by constructural
beams. It is recommended to check the natural
frequency of the steel frame, because it shall not
coincide with the pump speed. The exact horizontal
alignment is very important!

Ensure that the base plate is
leveled horizontally to 0.5 mm/m. To avoid any
distortion of put shims under the base plate before
bolting it down to the steel frame. Welding of the base
plate to the steel frame is not recommended because
of possible distortion of the same.

4.3.3 Concrete foundation

A concrete foundation must have an exact horizontal
alignment and must be placed on solid ground. First a
basic foundation shall be built with square shaped
holes for embedding the foundation bolts. After
putting the base plate into the foundation the proper
alignment can be obtained by adjusting it with shims
under the base plate. Now insert the foundation bolts
and grout the space between the basic foundation
and the base plate with grouting cement (refer to
illustration)

It is very helpful to use a properly made and stable
wooden frame around the base plate. So the grouting
cement will not flow side. When the grouting is totally
set and hardened the foundation bolts shall be
tightened in a firm and symmetrical way.

Page 14 of 37

4.4 Initial alignment

The adjustment of motor and pump must be checked
(if necessary, make a new adjustment) before first
start up of the unit.

Parallel

Angular

Ensure pump and driver are isolated electrically and
the half couplings are disconnected.
Align the motor to the pump, not the pump to the
motor. Alignment of the motor is achieved by using
the adjustment screws.

4.4.1 Permissible misalignment limits at working
temperature

When checking parallel alignment, the total indicator
read-out (TIR) shown is twice the value of the actual
shaft displacement.

The pump is only pre-aligned! Carefully check
or read just alignment before start of the unit.
Take out the spacer of the coupling and check the
alignment of shafts end of pump and driver. The
maximum allowable angular offset should not exceed
0,05 degree, this means the alignment of the shaft
ends should be 0,1 mm (0.004 in.). The maximum
parallel offset should not exceed 0,05 mm
(0.002 in) and the axially offset can be ± 1 mm
(0.04 in.).

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

For more details refer to the manufacturer’s

instruction manual of coupling.

a)

b)

c)

a) Angular Offset: The median lines of shafts

intersect half-way between the ends of the two
shafts.

a) Parallel Offset: The median lines run parallel. The

maximum allowable parallel offset depends on
the size of coupling and is indicated in the
instruction manual of manufacturer of coupling

b) Axially Offset: Another offset is the displacement

of one or both of the shafts. A typical example is
thermal expansion.

How the alignment of the coupling should be done
you can see on the sketches and explanations below!

a) b) c)
a) Fix the dial gauge on the driven shaft and check

the concentricity by turning of both hubs; correct it if
necessary.

b) Fix the dial gauge on one of the hubs and check

the uniformity of the distance by t urning of bot h
hubs.; correct it if necessary.

c) Fix the dial gauge on the driving shaft and check

the concentricity by turning of both hubs; correct it if

necessary.
If the pump is handling hot liquid, the alignment must
be rechecked in warm condition of the unit.
The alignment of the unit shall be checked again after
200 service hours.

Page 15 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

4.5 Piping

4.5.1 General

Protective covers are fitted to the pipe connections to
prevent foreign particles entering during
transportation and installation. Ensure that these
covers are removed from the pump before connecting
any pipes.
Maximum forces and moments allowed on the pump
flanges vary with the pump size and type. To
minimize these forces and moments which may
cause misalignment, hot bearings, worn couplings,
vibration and a possible failure of the pump, the
following points shall be strictly followed:

a) Prevent excessive external pipe load.
b) Do not connect piping by applying external force

(use of wrenches, crane,...). Piping shall be
aligned without residual stress.

c) Do not mount expansion joints so that their force,

due to internal pressure, acts on the pump flange.

Fitting an isolator and non-return valves can allow
easier maintenance. Never throttle pump on suction
side and never place a valve directly on the pump
inlet nozzle.
A non-return valve shall be located in the discharge
pipework to protect the pump from excessive back
pressure and hence reverse rotation when the unit is
stopped.
Piping and fittings shall be flushed before use. To
avoid damages of the pump install a Y-strainer or a
strainer of 40 mesh.
Piping for corrosive liquids shall be arranged to allow
pump flushing before removal of a unit.

4.5.2 Vent

All ERPN-M pump casings provides self venting
through top discharge nozzle arrangement. A small
bore at the top of the seal chamber ensures venting
of the same.

4.5.3 Drain

This connection is used for total drainage of the pump
casing. A flanged drain is standard and can be
optionally equipped with various kinds of valves.
Refer to GA drawing for details of the drain
connection.

By pumping toxic or explosive
media, provide the necessary security actions, e.g.
flushing with nitrogen.

4.6 Electrical connections

Electrical connections must be made by a qualified
Electrician in accordance with the relevant local
national and international regulations.

It is important to be aware of the EUROPEAN
DIRECTIVE on hazardous areas where compliance
with IEC60079-14 is an additional requirement for
making electrical connections.

It is important to be aware of the EUROPEAN
DIRECTIVE on electromagnetic compatibility when
wiring up and installing equipment on site. Attention
must be paid to ensure that the techniques used
during wiring/installation do not increase
electromagnetic emissions or decrease the
electromagnetic immunity of the equipment, wiring or
any connected devices. If in any doubt contact
Flowserve for advice.

The motor must be wired up in accordance with the
motor manufacturer's instructions (normally supplied
within the terminal box) including any temperature,
earth leakage, current and other protective devices
as appropriate. The identification nameplate should
be checked to ensure the power supply is
appropriate.

A device to provide emergency stopping must

be fitted.
If not supplied pre-wired to the pump unit the

controller/starter electrical details will also be supplied
within the controller/starter.

For electrical details on pump sets with controllers
see the separate wiring diagram.

See section 5.5, Direction of
rotation before connecting the motor to the electrical
supply.

4.7 Final shaft alignment check

After connecting piping to the pump, rotate the shaft
several times by hand to ensure there is no seizure
and all parts are free.
Recheck the coupling alignment, as previously
described, to ensure no pipe strain. If pipe strain
exists, correct piping.

5.0 COMMISSIONING START-UP,
OPERATION AND SHUTDOWN

Page 16 of 37

carried out by fully qualified personnel.

These operations must be

5.1 Precommissioning procedure

a) The bearing housing must be filled with the

indicated oil. Check also the oil level.

b) The pump must be completely filled with liquid to

avoid running dry and to guarantee a correct
performance of the pump.

c) During filling the pump shall reach the sp ecified

temperature, so pumps for hot liquids (T > 100 °C
(212 °F)) shall be warmed up by preflushing.

d) Check the sense of rotation of the pump (Coupling

spacer dismantled).
Sense of rotation is clockwise viewed to the drive
end of the pump.

e) Check the readiness of all auxiliary systems

(flushing sys., lubrication sys.,...) for start up.

f) All pipe work, including the internal and the

auxiliary pipe work, must be connected correctly
and must be absolutely tight. Check the tightness
of all connections of the auxiliary pipe work. The
suction valve must be open, the discharge valve
shall be closed.

g) Turn the pump by hand, if required with the help of

a lever, to check the free rotation of the rotor. The
rotor must turn uniformly and noiselessly. Some
resistance may be felt due to friction in bearings
and seals.

h) Check the readiness of the driver for start up. Refer

to the manual of the driver (preheating for
explosion proof E-motor).

5.2 Pump Lubricants

5.2.1 Lubrication

The bearing housing shall be filled with proper
lubricating oil prior to start up. If the pump will be
started after a longer storage period, the bearing
housing should be first flushed and cleaned with
gasoline. It is not necessary to remove the
preservation oil as this will mix up thoroughly with the
lubrication oil.
Lubrication is provided by the pumping effect of the
rotating ball bearings. Maintaining the correct oil level
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil.
As option a
lubrication is provided (refer to General Arrangement
Drawing).
For recommended lubricating oils refer to the
lubrication table 5.2.6

5.2.2 Purge oil mist lubrication

For preventing, that dirt or humidity get into the bearing
housing, this pump is equipped with a
connection for air or nitrogen supply.
Also at standstill the air or nitrogen supply shall be
maintained.

1

/2” NPT connection for a purge oil mist

1

/2” NPT

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

The pressure shall be between

0.01 bar (0.14 psi) and 0.02 bar (0.29 psi), otherwise
you have to consider an oil leckage and as a result a
bearing damage .
The supplied air or nitrogen shall be clean and dry.

5.2.3 Oil change

After first start up, the oil shall be changed after 200
service hours.
Every further oil change shall take place after about
2000 service hours or at least every 6 month.
To change the oil use the following procedure:
a) Remove the reservoir (for some type of oilers you

must loose a fixing screw or lock nut, refer to
section 5.2.4 Oil level).

b) Open the oil drain on the bearing housing to

remove the oil.

c) Close the oil drain and fill in Oil through the oiler

until the oil level reaches the bottom of the sight
glass.

d) Fill the reservoir and put it quickly to the body of the

oiler. Observe the lev el in the r eserv oir. It will
decrease until the required oil level is reached
(middle of the sight glass). Ensure that enough oil
remains in the reservoir.

e) If necessary, the oil level can be adjusted by

referring to section 5.2.4 Oil level.

5.2.4 Oil level

The correct oil level is in the middle of the oi l sight gla ss
and shall be checked when pump is not in operation.
Periodically check if the lubricating oil is mixed with any
condensed water. Careful opening of the oil drain
during a stop of the pump will show any water.

Use a spirit level to check the horizontal

alignment of the bearing housing.

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

5.2.4.1 Adjusting of ADAMS Constant Level Oiler

This design of Constant Oiler prevents the flooding of
the bearing by means of the positive setting in the
Oiler, thus maintaining the correct oil level at all
times. When these Oilers are used on Ball or Roller
bearings, the installation is the same as described
below, excepting that the oil level in the bearing
should never cover more than maximum above inside
diameter of the outer race at its lowest point.

Page 17 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

a) The oil level may be „fine tuned“ by turning the

adjusting sleeve (3) and finally locked into
position by tightening the lock nut (2). To
replenish, the reservoir and adaptor (1) may be
removed by sliding it out of the body, removing
the adaptor and fill the reservoir. Fully reinserting
the adaptor / reservoir into the body ensures the
previously adjusted oil level is maintained. The
oiler is equipped with an overflow tube to avoid a
rise of the oil level. This is necessary to maintain
a constant level in an oil bath lubrication system,
where an oil mist is used as primary lubrication.

If the pump is fitted with a Constant Level
Oiler type "ADAMS", no adjustment of the oil level is
possible.

5.2.4.2 Adjusting of DENCO Constant Level Oiler

If the pump is fitted with a Constant Level Oiler type
„DENCO“, the correct oil level has to be checked after
fitting the pump! Dimension a is the distance from the
centerline of the pump to the minimum oil level (marks
at the bearing housing).

1 Denco Oiler 2 lock nut 3 adjusting sleeve
4 oil sight glass 5 oil drain 6 distance sleeve

The oiler is preadjusted with the distance
sleeve [6], therefore no adjustment is required
anymore.

b) Additionally you can check the correct oiler

adjustment by an oil sight glass (correct oil level
is the middle of the oil sight glass).

Size of

Bearing

Frame

1 NU 207 7306 BECB (J),(M) 28 (1.1)
2 NU 309 7309 BECB (J),(M) 40 (1.58)
3 NU 311 7311 BECB (J),(M) 49 (1.93)
4 NU 313 7313 BECB (J),(M) 57 (2.24)
5 NU 315 7315 BECB (J),(M) 65 (2.56)

6

Cylindrical roller

bearing [476]

NU 317 7317 BECB (J),(M) 72 (2.84)

Angular contact ball

bearing [477]

Refer to nameplate or part list, to reading
the correct frame size.

Dimension

„a“ mm (in)

Page 18 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

5.2.4.3 Adjusting of TRICO Constant Level Oiler

If the pump is fitted with a Constant Level Oiler type
„TRICO“, the correct oil level has to be checked after
fitting the pump! Dimension a is the distance from the
centerline of the pump to the minimum oil level (marks
at the bearing housing).

1 Trico-Oiler 2 fixing screw 3 levelling screw
4 oil sight glass 5 oil drain 6 counternut

a) To check quickly the correct oiler adjustment,

measure the dimension x from the oiler-rim to the
minimum oil level (lower mark at the bearing
housing). After that check the dimension from the
oiler rim to the adjusting screw and compare it
with the dimension x, if required turn the adjusting
nut with tolerances of plus 0 mm and minus 2 mm
(see figure), and fix it.

b) Additionally you can check the correct oiler

adjustment by an oil sight glass (minimum oil
level is the middle of the oil sight glass).

Size of

Bearing

Frame

1 NU 207 6306 - C3 28 (1.1)
2 NU 207 6306 - C3 28 (1.1)
3 NU 309 6309 - C3 40 (1.58)
4 NU 309 6309 - C3 40 (1.58)

Cylindrical roller

bearing [476]

Angular contact ball

bearing [477]

Dimension

„a“ mm (in)

Refer to nameplate or part list, to reading
the correct frame size.

5.2.5 Oil quality

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
be in accordance with the lowest expected
temperature of the bearing housing during a stop of
the pump. For recommended lubricating oils refer to
the lubrication table.
Having selected the corresponding oil quality the
actual oil temperature at the bearing housing must be
checked after two service hours of the pump.
Considering this measured oil temperature the actual
viscosity must be determined by using the data sheet
of the oil, to verify the minimum required viscosity of
10 cSt. Do not forget, the oil temperature in the
bearing itself is about 10 °C (50 °F) higher than the oil
temperature at the bearing housing. On the following
table the oil viscosity is given at 40 °C (104 °F).
Determining the correct lubricating oil one must take
into consideration that all bearings will have higher
temperatures during the first 20 service hours. In
constant operation the bearing temperature will
decrease about 10 °C (50 °F). The oil temperature
shall be lower than 85 °C (185 °F) after this running­in time. If the temperature is higher, the reason may
be a wrong oil quality, wrong oil level or overload of
the pump because of excessive wear.
If the humidity at the site is high, the roller bearings
become easily rusty during stand still periods. To
avoid that, we recommend to mix the lubricating oil
with a corrosion inhibitor contact your lubrication oil
supplier for propper additives inhibitors.

5.2.6 Oil quantity – Frame I

Bearing size is shown on the name plate of the pump,
and with this the correct thrust bearing frame can be
selected according to the following table.

Oil quantity

0,42 l (14.2 Fl.oz.)

Bearing housing [470]

with Oiler [357]

without Oiler [357]

0,3 l (10.1 Fl.oz.)

Page 19 of 37

5.2.7 Oil quantity – Frame II

Bearing size is shown on the name plate of the pump,
and with this the correct thrust bearing frame can be
selected according to the following table.

Oil quantity

Bearing housing [470]

with Oiler [357]

0,62 l (21 Fl.oz.)

without Oiler [357]

0,5 l (16.9 Fl.oz.)

5.2.8 Oil quantity – Frame III

Bearing size is shown on the name plate of the pump,
and with this the correct thrust bearing frame can be
selected according to the following table.

Oil quantity

0,82 l (27.7 Fl.oz.)

Bearing housing [470]

with Oiler [357]

without Oiler [357]

0,7 l (23.7 Fl.oz.)

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

5.2.9 Oil quantity – Frame IV

Bearing size is shown on the name plate of the pump,
and with this the correct thrust bearing frame can be
selected according to the following table.

Oil quantity

Bearing housing [470]

with Oiler [357]

1,42 l (48 Fl.oz.)

without Oiler [357]

1,3 l (43.9 Fl.oz.)

Page 20 of 37

5.2.10 Lubrication Table

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Oil lubrication / Recommendation

Bearing temp.

Ambient temp.

Mobil

BP

MOBIL SHC 624(synthetic)
MOBIL DTE 24

Energol HLP-HM 32
Energol HLP-HM 46

+40 °C - +70 °C

(+104 °F - +158 °F)

-5 °C - +40 °C

(-23 °F - +104 °F)

+70 °C - +100 °C

(+158 °F - +212 °F)

-5 °C - +40 °C

(-23 °F - +104 °F)

1

32,4

Mobil DTE 27 951Mobil SHC 629 ( synthetic) 143

1

31

1

32

Energol HLP-HM 100 941

1

46

+100 °C - +120 °C

(+212 °F - +248 °F)

-5 °C - +40 °C

(-23 °F - +104 °F)

Shell Shell Turbo T 46 491Shell Turbo T 100 1001Shell Morlina 220 220

1

Esso

TERESSO 32
TERESSO 46

30
43

1

NUTO 100
NUTO 150

Castrol Hyspin AWS 32 321Alpha SP 100 100

1

100

NUTO 220 220

1

150

Alpha SP 220

1

Alphasyn T 150 ( synthetic)

OMV OMV turb HTU 46 461OMV turb HTU 100 1001OMV turb HTU 460 460

Aral

Aral Degol BG 46
Aral Vitam GF 46

1

46

Aral Degol BG 100 100

1

46

1

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

Seal System / Pumped Liquid Quench-Oil General Features

Barrier/Buffer Fluid for
Mech. Seal

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 51562

Tandem Seal to -40 °C (-40 °F)
Back to back Seal with gascoffer-dam
Conventional back to back Seal

- Raffinated Hydraulic Oil

- Synthetic Oil

- Mixture of water / glykol
ATTENTION:

Do not use Methanol

appr. 10-15 cST at 40°C
(104 °F)

below -40°C (-40 °F)
Pourpoint vaporization
above 80°C (176 °F)

220
150

1

1

1

1
1

1

Page 21 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

5.3 Impeller clearance

No axial adjustment of the rotor is necessary.

5.4 Direction of rotation

The sense of rotation of the
pump is clockwise (CW); looking from the coupling to
the shaft end of the pump.

The rotation of the driver shall be checked.

5.5 Guarding

Be sure that the coupling guard is mounted correctly
at the baseplate prior to start up.

5.6 Priming and auxiliary supplies

The pump must be completely primed prior to start
up.
a) The pump casing is considered as self venting,

so no vent connections are provided.

b) Auxiliary systems, e.g. barrier /buffer fluid

systems, cooling circuits, shall be filled according
to the user instructions.

To prevent the pump from reverse rotation
after shut down, the installation of a check valve
is recommended.
Check the discharge and suction pressure gauge
to verify the pumps delivered head.
The pump must operate smoothly, and the
vibration must be below 3 mm/s (0.2 in./sec) (API
610 vibration limits).
If a minimum flow valve is installed, take pressure
gauge readings to verify the correct operation.

c) Check the pipe system against any leakage.
d) Check the magnetic coupling against any leakage.

Check temperature of the can to

avoid damage of the Silicon Carbide bearings.

5.8 Operation

a) Verify that the pump is operating within the

specified limits, min/max flow, pressure,
temperature, vibration, power

b) The bearing housing temperature shall not exceed

80 °C (176 °F). If higher bearing temperature are
observed, check the viscosity grade of the used
lubrication oil.

5.7 Starting the pump

a) Start the driver according to the specification.

(Refer to driver IOM).

Pumps are usually started against

closed discharge valve.

b) Check the discharge and suction pressure gauge

to verify the pumps delivered head. Open the
discharge valve slowly, until the pump reaches the
specified operation point. The pump must operate
smoothly, and the vibration must be below 3 mm/s
(0.2 in./sec) (API 610 vibration limits).

The discharge valve must be opened
within 10 sec. after start up. Longer operation
against closed discharge valve will damage the
pump. If a minimum flow valve is installed, take
pressure gauge readings to verify the correct
operation.

If the backpressure of the discharge
pipe is sufficient, pumps can be started against
open valve.

Ensure that your driver is capable deliver

the higher torque required by starting against
open valve.

The minimum viscosity is 10
cSt at the expected oil temperature.
(Oil temperature = bearing gland temperature
+ 10 °C (+50 °F))

c) Check if the temperature monitoring system is

working correctly. It is essential that any abnormal
temperature increase is detected immediately.
(The max. temperature shall not exceed the fluid
temperature +20 °C (+68 °F)). Therefore we strictly
recommend to include the temperature monitoring
system into your process control.

d) Observe the power consumption of the pump to

detect excessive wear.

5.9 Stopping and Shutdown

a) Close the outlet valve, but ensure that the pump

runs in this condition for no more than a few
seconds.

b) Stop the pump.
c) Switch off flushing and/or cooling/ heating liquid

supplies at a time appropriate to the process.

d) For prolonged shut-downs and especially when

ambient temperatures are likely to drop below
freezing point, the pump and any cooling and
flushing arrangements must be drained or
otherwise protected.

For automatic start/stop operation of the

pump, ensure that all steps described in chapter 5.6,

5.7, 5.8 and 5.9 are implemented in the control logic.

Page 22 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

5.10 Hydraulic, mechanical and electrical
duty

This product has been supplied to meet the
performance specifications of your purchase order,
however it is understood that during the life of the
product these may change. The following notes will
help the user to decide how to evaluate the
implications of any change. If in doubt contact your
nearest Flowserve office.

5.10.1 Specific gravity (SG)

Pump capacity and total head in meters (feet) do not
change with SG, however pressure displayed on a
pressure gauge is directly proportional to SG. Power
absorbed is also directly proportional to SG.
It is therefore important to check that any change in
SG will not overload the pump driver or over­pressurize the pump.

5.10.2 Viscosity

For a given flow rate the total head reduces with
increased viscosity and increases with reduced
viscosity. Also for a given flow rate the power
absorbed increases with increased viscosity, and
reduces with reduced viscosity. It is important that
checks are made with your nearest Flowserve office if
changes in viscosity are planned.

5.10.3 Pump speed

Changing pump speed effects flow, total head, power
absorbed, NPSHR, noise and vibration. Flow varies
in direct proportion to pump speed. Head varies as
speed ratio squared. Power varies as speed ratio
cubed. If increasing speed it is important therefore to
ensure the maximum pump working pressure is not
exceeded, the driver is not overloaded,
NPSHA>NPSHR, and that noise and vibration are
within local requirements and regulations.

5.10.4 Net positive suction head (NPSH

NPSH available (NPSHA.) is a measure of the
energy available in the pumped liquid, above its
vapour pressure, at the pump suction branch.
NPSH required (NPSHR.) - is a measure of the
energy required in the pumped liquid, above its
vapour pressure, to prevent the pump from cavitating.
It is important that NPSHA >NPSHR. The margin
between NPSHA >NPSHR should be as large as
possible. If any change in NPSHA is proposed,
ensure these margins are not significantly eroded.
Refer to the pump performance curve to determine
exact requirements particularly if flow has changed. If
in doubt please consult your nearest Flowserve
for advise and details of the minimum allowable
margin for your application.

A)

office

5.10.5 Pumped flow

Flow must not fall outside the minimum and
maximum continuous safe flow shown on the pump
performance curve and/or data sheet.

6.0 MAINTENANCE

6.1 General

It is the plant operator's responsibility to
ensure that all maintenance, inspection and assembly
work is carried out by authorized and qualified
personnel who have adequately familiarized
themselves with the subject matter by studying this
manual in detail.
(See also section 1.6.2.)

Any work on the machine must be performed when it
is at a standstill. It is imperative that the procedure
for shutting down the machine is followed, as
described in section 5.9.

On completion of work all guards and safety devices
must be re-installed and made operative again.

Before restarting the machine, the relevant
instructions listed in section 5, Commissioning, start
up, operation and shut down must be observed.

Oil and grease leaks may make the ground
slippery. Machine maintenance must always
begin and finish by cleaning the ground and the
exterior of the machine.

If platforms, stairs and guard rails are required for
maintenance, they must be placed for easy access to
areas where maintenance and inspection are to be
carried out. The positioning of these accessories
must not limit access or hinder the lifting of the part to
be serviced.

When air or compressed inert gas is used in the
maintenance process, the operator and anyone in the
vicinity must be careful and have the appropriate
protection.

Do not spray air or compressed inert gas on skin.
Do not direct an air or gas jet towards other people.
Never use air or compressed inert gas to clean

clothes.
Before working on the pump, take measures to

prevent an uncontrolled start. Put a warning board
on the starting device with the words:
"Machine under repair: do not start".

Page 23 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

With electric drive equipment, lock the main switch
open and withdraw any fuses. Put a warning board
on the fuse box or main switch with the words:
"Machine under repair: do not connect".

Never clean equipment with inflammable solvents or
carbon tetrachloride. Protect yourself against toxic
fumes when using cleaning agents.

6.2 Maintenance schedule

It is recommended that a maintenance plan
and schedule is adopted, in line with these User
Instructions, to include the following:

a) Any auxiliary systems installed must be monitored,

if necessary , to ensure they

b) Check for any leaks from gaskets and seals. The

correct functioning of the magnetic coupling must
be checked regularly.

c) Check bearing lubricant level, and if the hours run

show a lubricant change is required.

d) Check that the duty condition is in the safe

operating range for the pump.

e) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

f) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

h) Check coupling alignment and re-align if

necessary.

Our specialist service personnel can help with
preventative maintenance records and provide
condition monitoring for temperature and vibration to
identify the onset of potential problems.

If any problems are found the following sequence of
actions should take place:
a) Refer to section 8, Faults; causes and remedies,

for fault diagnosis.

b) Ensure equipment complies with the

recommendations in this manual.

c) Contact Flowserve if the problem persists.

6.2.1 Routine Inspection (daily/weekly)

The following checks should be
made and the appropriate action taken to remedy any
deviations.
a) Check operating behavior; ensure noise, vibration

and bearing temperatures are normal.

b) Check that there are no abnormal fluid or

lubricant leaks (static and dynamic seals) and
that any sealant systems (if fitted) are full and
operating normally.

c) Check that shaft seal leaks are within acceptable

limits.

function correctly.

d) Check the level and condition of lubrication oil.

On grease lubricated pumps, check running
hours since last recharge of grease or complete
grease change.

e) Check any auxiliary supplies eg. heating/cooling

(if fitted) are operating correctly.

f) Refer to the manuals of any associated

equipment if routine checks needed.

6.2.2 Periodic Inspection (every 6 Month)

a)

security of attachment and corrosion.

b) Check pump operation hours to determine if

bearing lubricant shall be changed.

c) The coupling should be checked for correct

alignment and worn driving elements.

Check foundation bolts for

 Refer to the manuals of any associated

equipment for periodic checks needed.

6.3 Spare parts

6.3.1 Ordering of spares

When ordering spare parts we need the following
information:

1. pump type and pump size

2. serial number of the pump

3. number of the required spare parts

4. reference number and name of the part as listed
in the part list or in the sectional drawing

Example: for ERPN-M pump:
ERPN-M 150-200, serial number G202222/01

1 piece impeller Pos. 425
The serial number of each pump is indicated on the

name plate. If the material should be changed from
the original delivered one, additionally indicate the
exact material specification. If ordered impellers shall
have smaller or larger outer diameter, indicate also
with your order. Without a special remark the spare
impellers will be delivered with the diameter of the
original impellers.

If you need the wear rings oversized or undersized,
please indicate, otherwise the wear rings will be
delivered with standard size.

To ensure continuous satisfactory operation,
replacement parts to the original design specification
should be obtained from Flowserve.
Any change to the original design specification
(modification or use of a non-standard parts) will
invalidate the pump’s safety certification.

Page 24 of 37

6.3.2 Storage of spares

Spares should be stored in a clean dry area away from
vibration. Inspection and retreatment of metallic
surfaces (if necessary) with preservative is
recommended at a 6 monthly interval.

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Page 25 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

6.4 Recommended spares

Spares Recommended
Part Start up Normal Maintenance

No.of identical pumps 1 - 3 4 - 6 7+ 1 - 3 4 - 6 7 - 9 10+

Case 1
Head (case cover and stuffing box) 1
Bearing housing 1
Shaft (w/key) 1 1 2 1
Impeller 1 1 2 3
Wear rings (set) 1 1 1 1 1 2 3
Bearings complete (antifriction,radial) 1 2 3 1 2 3 3
Bearings complete (antifriction,thrust) 1 2 3 1 2 3 3
Magnetic Coupling 1 2 3 1 2 3 3
Secondary seal 1 2 3 1 2 3 3
Gaskets, O-rings (set) 1 2 3 1 2 3 3

6.5 Fastener torques

Tightening torque MA Nm (lbf.ft)

Size of

screw

M 4 2 (1,5) 2,4 (1,8) 2,8 (2,1) 0,9 (0,7) 2 (1,5)
M 5 3,9 (2,9) 4,8 (3,6) 5,6 (4,1) 1,8 (1,4) 3,9 (2,9)
M 6 6,8 (5) 8,3 (6,1) 9,7 (7,1) 3,2 (2,3) 6,8 (5)

M 8 16,2 (12) 19,8 (14,6) 23,1 (17) 7,6 (5,6) 16,2 (12)
M 10 31,9 (23,6) 39 (28,8) 45,4 (33,5) 14,9 (11) 31,9 (23,6)
M 12 55,4 (40,9) 67,8 (50) 78,8 (58,2) 25,9 (19,1) 55,4 (40,9)
M 14 87,9 (64,9) 107,5 (79,3) 125,1 (92,3) 41 (30,3) 87,9 (64,9)
M 16 134,6 (99,3) 164,5 (121,4) 191,4 (141,3) 62,8 (46,4) 134,6 (99,3)
M 18 188 (139) 230 (170) 267 (197) 88 (65) 188 (139)
M 20 263 (194) 321 (237) 373 (276) 123 (90) 263 (194)
M 22 353 (260) 431 (318) 502 (370) 165 (121) 196 (145)
M 24 453 (334) 553 (408) 644 (475) 211 (156) 251 (186)
M 27 654 (483) 799 (590) 930 (686) 305 (225) 363 (268)
M 30 892 (658) 1090 (805) 1269 (936) 416 (307) 496 (366)
M 33 1200 (886) 1467 (1082) 1707 (1260) 560 (413) 667 (492)
M 36 1550 (1144) 1895 (1398) 2205 (1627) 723 (534) 861 (636)
M 39 1988 (1467) 2430 (1793) 2827 (2086) 928 (685) 1104 (815)
M 42 2472 (1824) 3021 (2229) 3515 (2594) 1153 (851) 1373 (1013)
M 45 3061 (2259) 3741 (2761) 4354 (3213) 1429 (1054) 1701 (1255)

M48 3703 (2732) 4526 (3340) 5266 (3886) 1728 (1275) 2057 (1518)
M64 8862 (6539) 10831 (7993) 12604 (9301) 4136 (3052) 4923 (3633)

Duplex SS

(S32760, S31803,

1.4462)

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

Carbon Steel (NACE)

(A 193 Gr.B7M,
A 320 Gr. L7M)

Carbon Steel

(A 193 Gr. B7,

A 320 Gr. L7, 8.8)

Austenitic SS

(A 193Gr. B8MA)

(NACE)

Austenitic SS

(A 193 Gr. B8/B8M,

A4-70,A2-70)

Page 26 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

6.6 Setting impeller clearance

No axial adjustment of the rotor is necessary.

6.7 Disassembly

Refer to section 1.6, Safety, before

dismantling the pump.

Before dismantling the pump for
overhaul, ensure genuine Flowserve replacement
parts are available.
Refer to sectional drawings for part numbers and
identification.

6.7.1 Dismantling of pump

1) Completely drain the pump by using the drain

connection. By pumping explosive or toxic media,
flush your system with Nitrogen.

2) Remove coupling guard and uncouple the pump

from the motor. Pull off the coupling hub from the
pump shaft [415] and take out the key [422].

Ensure that the motor is

locked against start up.

If applied pull off the vane.

3) Drain the oil from the bearing housing, using the

drain connection [206]. If required disconnect all
auxiliary pipings and auxiliary devices like
vibration probes, temperature probes, ect.

4) Loose hex nuts [0291] at the pump casing and the

hex nuts of the wobble plate [488] for the
baseplate. Now you can pull out the complete
pump assembly from its casing.

Larger pumps are equipped with

jack screws [306] to pull out the pump assembly.

Be sure that the two pins
[044] are screwed in the casing for guiding the
outer rotor assembly during pulling off.

6.7.2 Dismantling of the outer rotor

1) Take out the casing gasket [398] located between
the secondary containment [471] and the pump
casing cover [470].

The casing gasket [398] shall be
renewed after each disassembly. Now the outer
rotor can be dismantled.

2) Remove retaining ring for shaft [4651] and pull
outer rotor of magnetic coupling [M02] inclusive
driving flange [465] from driving shaft [415].

Pay attention that the magnets
of outer rotor [M02] will not be damaged.
Afterwards remove keys [423].

3) Loose socket screws [021] to separate mechanical
seal unit from barrel [471] and pull it of the driving
shaft [415].

4) Now disassemble carefully seal end plate [506]
inclusive gasket [495], cylindrical pin [524] and
stationary seal ring [G01] together with stationary
seal ring packing [G03] and throttle ring [G02] from
barrel [471].

5) Furthermore pull off shaft sleeve [509] with O-ring
[450] and whole rotating unit of me chanical seal
[G04, G05, G06, G07] from driving shaft [415].

6) Next loose the hex nuts [035] of studs [034] and
separate bearing housing [470] from barrel [471].

Pay attention to O-ring [494]
which has to be renewed after every dismantling to
assure security of pump.

7) Now line bearing cover [478] together with shaft
seal [4781] can be separated from barrel [471] by
loosening the socket screws [021]. Check whether
the guard ring is worn and has to be changed.

8) Loose hex screw [031] from thrust bearing cover
[479] and pull it together with O-ring [493] and
labyrinth-type seal [4791] from bearing housing
[4791] respectively from driving shaft [415].

9) Now you can carefully pull driving shaft [415]
inclusive cylindrical roller bearing [476], deep
groove ball bearing [477], locking plate [464] and
locking nut [463] towards coupling hub out of
bearing housing [470].

10) Bend locking plate [464] and loose locking nut
[463] from shaft.

11) Pull off deep groove ball bearing [477] from driving
shaft [415] with the aid of a puller and check
whether the inner ring of cylindrical roller bearing
has to be renewed, too. There are two possibilities
to remove it from driving shaft [415].
Heat up inner ring uniformly by welding torch or
blowtorch until it slips from shaft. Take care that the
shaft stays as cold as possible because otherwise
it will get distorted.
Transport the shaft to a work bench and turn the
inner ring from shaft if there is no other possibility to
remove it.

12) Squeeze roller bearing [476] without inner ring out
of bearing housing [470].

13) Check retaining ring for bore [4761] against any
damage.

Frame Thrust bearing Line bearing

1 6306 – C3 NU 207
2 6306 – C3 NU 207
3 6309 – C3 NU 209
4 6309 – C3 NU 209

Page 27 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

6.7.3 Dismantling of the inner rotor

1) Loose both socket screws [042] and pull out casing
cover inclusive inner rotor [M01] of magnet
coupling, impeller shaft [417] and impeller [425] out
of pump casing [360].

2) Remove casing gasket [398] from pump casing
[360].

The casing gasket [398] shall be
renewed after each disassembly. Now the inner
rotor can be dismantled.

3) Place inner rotor assembly vertically on impeller
[425] and unscrew socket screw [043] and pull off
can [M03] upwards and then remove O-ring [507]
from casing cover [370].

4) Unscrew socket screw [M08] and pull carefully the
inner rotor [M01] from axial bearing [M06].

5) Now detach the non-positive connections of locking
plate [4174], screw hex screw out of shaft [417] and
remove locking plate [4174] and washer [4172].

Take care of inner rotor [M01]
of magnetic coupling so that the magnets will not
be damaged.

6) Loosen socket screw [041] to pull radial bearing
[M04], axial bearings [M05] and [M06], shaft sleeve
[M07] from shaft [417] respectively casing cover
[370].

7) As next step pull casing cover [370] inclusive
casing wear ring [367] from impeller [425] and turn
the impeller shaft [417] inclusive impeller [425] by
180°.

8) Unsecure locking plate [454] and loose impeller nut
[456] (right hand thread).

Pumps having a screwed inducer
have no impeller nut. Therefore loose the inducer.
Pumps having a slipped on inducer, the socket
screw [456] must be loosed.

9) Pull off the impeller [425] from its shaft [415].
Remove key [416].

By pumps having a slipped on

inducer, the inducer must be pulled off first.

6.8 Examination of parts

1) Check the casing wear ring and the impeller wear

ring against any wear. The diametrical clearance
between the rings must not exceed twice the
value in new condition. Pumps with semi open
impeller have no wear rings. Check the wear
plate and the impeller [425] against any wear.
Semi open and free flow impellers have back
vanes, which shall be checked against any wear.

2) Check all parts against corrosion and erosion.

3) Carefully check the coupling against any wear.

4) Rotate the angular contact bearing by hand, to

check against abnormal sound. Check the

bearing cages against any wear and the outer
and inner race against running marks. Check the
runout of the shafts. TIR (Total Indicated Runout)
shall not exceed 0.04 mm/m (0.0005 in./ft) of
length. TIR shall not exceed 0.08 mm (0.003 in.)
over total shaft length.

5) Check the clearance between guard ring [4711]
and outer rotor [M02]. Max. allowable diametrical
clearance is 2 mm (0.08 in.), 1 mm (0.04 in.) in
new condition.

6.8.1 Gap at closed impeller – ERPN-M

The diametrical gap between wear rings [367]
and [433] in assembled condition is:

Pump size

25-125 78 (3.1) 0.3 (0.012)
25-160 78 (3.1) 0.3 (0.012)
25-200 78 (3.1) 0.3 (0.012)
32-125 78 (3.1) 0.3 (0.012)
32-160 78 (3.1) 0.3 (0.012)
32-200 78 (3.1) 0.3 (0.012)
40-125 90 (3.5) 0.3 (0.012)
40-160 90 (3.5) 0.3 (0.012)

FRAME 1

40-200 105 (4.1) 0.3 (0.012)
50-125 95 (3.7) 0.3 (0.012)
50-160 105 (4.1) 0.3 (0.012)
50-200 105 (4.1) 0.3 (0.012)
65-125 114 (4.5) 0.3 (0.012)
32-250 90 (3.5) 0.3 (0.012)
40-250 105 (4.1) 0.3 (0.012)
50-250 105 (4.1) 0.3 (0.012)
65-160 138 (5.4) 0.35 (0.014)
65-200 138 (5.4) 0.35 (0.014)
65-250 138 (5.4) 0.35 (0.014)

FRAME 2

80-160 138 (5.4) 0.35 (0.014)

80-200 169 (6.7) 0.35 (0.014)
100-200 169 (6.7) 0.35 (0.014)
125-204 176 (6.9) 0.25 (0.010)

40-315 105 (4.1) 0.3 (0.012)

50-315 124 (4.9) 0.35 (0.014)

65-315 138 (5.4) 0.35 (0.014)

80-250 138 (5.4) 0.35 (0.014)

80-315 169 (6.7) 0.35 (0.014)

80-404 169 (6.7) 0.35 (0.014)
100-250 169 (6.7) 0.35 (0.014)
100-404 169 (6.7) 0.35 (0.014)
125-254 179 (7.1) 0.35 (0.014)

FRAME 3

125-319 184 (7.2) 0.35 (0.014)
125-404 184 (7.2) 0.35 (0.014)
150-250 225 (8.9) 0.4 (0.016)
150-254 225 (8.9) 0.4 (0.016)
150-319 225 (8.9) 0.4 (0.016)
200-254 242 (9.5) 0.4 (0.016)

50-380 124 (4.9) 0.35 (0.014)

65-400 138 (5.4) 0.35 (0.014)

80-400 169 (6.7) 0.35 (0.014)
100-315 169 (6.7) 0.35 (0.014)
150-315 225 (8.9) 0.4 (0.016)
150-404 225 (8.9) 0.4 (0.016)

FRAME 4

200-250 235 (9.3) 0.4 (0.016)
200-319 256 (10.1) 0.4 (0.016)
200-404 256 (10.1) 0.4 (0.016)
250-319 300 (11.8) 0.4 (0.016)

Wear ring

diameter mm (in.)

Diametrical

clearances mm (in.)

Page 28 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

100-400 184 (7.2) 0.35 (0.014)
150-400 225 (8.9) 0.4 (0.016)
150-504 225 (8.9) 0.4 (0.016)
200-315 235 (9.3) 0.4 (0.016)
200-400 235 (9.3) 0.4 (0.016)

FRAME 5

200-504 256 (10.1) 0.4 (0.016)
250-404 265 (10.4) 0.4 (0.016)
250-504 300 (11.8) 0.4 (0.016)
150-604 225 (8.9) 0.4 (0.016)
200-604 256 (10.1) 0.4 (0.016)

FR. 6

250-604 300 (11.8) 0.4 (0.016)

Gaps apply approximately for wear rings

in all materials and in assembled condition.

6.8.2 Gap at free flow impeller – ERPN-M – F

Diametrical gap between vane on the back of impeller
[425] and casing cover [370] in assembled condition:
1 mm [0.04 in.].
Diametrical gap between vane on the front of impeller
[425] and pump casing [360] depends on the width of
pump casing spiral as impeller is located outside and
a quarter of width of impeller outlet extend into spiral
at most.

6.8.3 Gap at open impeller – ERPN-M – O

Diametrical gap between vane on the back of impeller
[425] and casing cover [370] in assembled condition:
1 mm [0.04 in.].
Diametrical gap between vane on the front of impeller
and pump casing [360] in assembled condition: 1mm
[0.04 in.].

6.9 Assembly

To assemble the pump consult the sectional
drawings, see section 8, Parts list and drawings.

Ensure threads, gasket and O-ring mating faces are
clean. Apply thread sealant to non-face sealing pipe
thread fittings.

6.9.1 Assembly of the inner rotor

1) Slip on the casing cover [370] and insert key
[416] into the keyway. Slip on impeller [425] and
locking plate [4549 to the shaft [415]. Fasten the
impeller with the impeller nut [456] and secure it
with the locking plate [454].

Pumps having a screwed inducer,
have no impeller nut. Therefore fasten the
impeller with the inducer. Pumps having a slipped
on inducer are fastened by using the socket
screw [456].

2) Put the axial bearing [M05] on impeller shaft [417]
so that it touches the shaft shoulder. The cylindrical
pin [4173] previously fixed on impeller shaft [417]
must fit into the corresponding hub.

3) Now fix radial bearing [M04] on casing cover [370]
by socket screws [041] so that longitudinal groove
of inner diameter lies approximately in horizontal
line (vertically to resulting radial forces).
Arrangement of screws allow that the bearing can
only be mounted in this position.

4) Put shaft sleeve [M07] on impeller shaft [417].
Alignment of the axial bearing [M05] happens
simultaneously.

5) Put the key [418] into shaft groove and push axial
bearing [M06] on impeller shaft [417] where it is
fixed and secured by a washer [4172] and a hex
screw [4171].

Prestress bearing parts always
in a vertical shaft position. Turn torque constantly
and uninterruptedly. Beats are prohibited. The
impeller shaft should turn easily when supported at
casing cover [370].

6) Now push inner rotor [M01] of magnetic coupling
on axial bearing [M06]. The two cylindrical pins
[M09] have to gear into the corresponding bores for
guidance.

7) Fix the inner rotor [M01] by socket screws
[M08].Secure these screws by Loctite.

8) Put new gasket [507] into casing cover [370].
Push can [M03] over the inner rotor [M01] and
screw it on casing cover [370] by socket screws
[043].

Pay attention to circulation
bores which ensure an automatically vent and
outflow by a free flow.
After all above mentioned steps lift complete
driver unit into pump casing [360] and fix it by
socket screws [042]. Pay attention that there is a
new O-ring [398] in pump casing. Pay attention to
correct position of casing cover [370] to pump
casing [360] for assembling, too.

9) Put gasket [398] into the foreseen groove of
pump casing [360]. Now lift the complete "back­pull out" assembly by crane and push it into the
pump casing [360].

The casing gasket [398] shall be

renewed after each disassembly.

10) Fasten crosswise the socket screws [042].

Take care that the pump
casing cover can [370] is connected to the pump
casing [360] in correct position.

6.9.2 Assembly of the outer rotor

1) Heat up the angular contact bearings [477] and
push it on the shaft [415] as shown in the section
drawing. Put on locking plate [464] and fix the
thrust bearing with the shaft nut [463] and secure
it by the locking plate.

Page 29 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

2) Heat up the inner race of the roller bearing [476]
and push it on the shaft [415].

3) Install both retaining rings [4771] into bearing
housing. Push line bearing [476] without inner
race into the bearing housing [470]. Mount radial
bearing cover [478] including O-ring [493] by
using hex screws [031].

4) Insert shaft [415] with already mounted bearings
into prepared bearing housing [470]. Mount thrust
bearing cover [479] including O-ring [493] by
using hex screws [031].

5) Put in the labyrinth type seal [4791] into thrust
bearing cover [479].

Take care that the oil return slot of
the bearing cover is at the bottom and one slot of
the labyrinth ring meets the oil return slot.

6) Check if the rotor can be turned by hand.

7) Turn complete unit by 180°, so that shaft end
shows downwards and bearing housing [470] with
thrust bearing cover [479] lies on the workbench.

8) Put gasket [495] into barrel [471] and mount line
bearing cover [478] by socket screws [021].

Do not forget to put shaft seal into line

bearing cover [478].

9) Put new O-ring [494] into groove of bearing
housing [470] and pull the pre-mounted barrel [471]
through the impeller shaft [415] over the bearing
housing [470] and bolt the two casings together by
studs [034] and hex nuts [035].

10) Now put key [423] into the keyway and driving
flange [465] inclusive outer rotor [M02] secured by
socket screws [045] on driving shaft [415] and fix it
with retaining ring for shaft [4651].

Pay attention that guard ring
[4711] is pressed in barrel [471] and the gasket
[398] is assembled.

11) Now lift complete pre-mounted outer rotor slowly
by crane on the pre-mounted inner rotor of pump
with the aid of cylindrical pins [044] whi ch are
screwed into the pump casing [360].

The outer rotor [M02] of
magnetic coupling must not touch can, [M03]
otherwise the magnets will be destroyed.

Pay attention to hex screw [036] so
that they do not block assembly of pump. F or
torques refer to section 6.5 Fastener torques.

12) Check whether you can turn rotor by hand. Fit the
„Constant Level“ oiler and fill oil into bearing
housing.

For correct oil level and adjustment

refer to section 5.2.1, Lubrication.

Frame Thrust bearing Line bearing

1 6306 – C3 NU 207
2 6306 – C3 NU 207
3 6309 – C3 NU 209
4 6309 – C3 NU 209

7.0 AUXILIARIES

7.1 Secondary Seal

The pump is equipped with a secondary containment
seal. This can be a non-contacting lip seal or a non­contacting dry gas seal (refer to sectional drawing).
The purpose of this seal is to avoid leakage to
atmosphere in case of a failure of the magnetic
coupling.
During normal operation the barrel [471] is exposed
to atmospheric pressure, in case of failure of the
magnetic coupling the barrel will be pressurized and
non-contacting seal will close.

We strictly recommend to install a
pressure switch, which shut down the pump in case a
pressure is build up in the barrel. This avoids further
damage of the pump and the secondary seal seals
against static pressure only.

7.2 Changing of secondary seal

Refer to section 6.7.2, Dismantling of the outer rotor,
and section 6.9.2, Assembly of the outer rotor.

7.3 Seal and seal systems

7.3.1 Flushing plan no. 1S according to API 685

Flushing of magnetic coupling is performed according
to API 685 flushing plan no.1S. Thereby the pumped
medium is led to the magnetic coupling internally
from higher pressure side through a small hole in
casing cover [370].
Flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses.

7.3.2 Flushing plan no. 11S according to API 685

Flushing of magnetic coupling is performed according
to API 685 flushing plan no.11S. Thereby the pumped
medium is led to magnetic coupling (connection „F“)
from pump discharge through an orifice.
Flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses.

Page 30 of 37

7.3.3 Flushing plan no. 21S according to API 685

Flushing of magnetic coupling is performed according
to API 685 flushing plan no.21S. Thereby the pumped
medium is led to magnetic coupling (connection „F“)
from pump discharge through an orifice and a cooler.
Flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses

7.3.4 Flushing plan no. 31S according to API 685

Flushing of magnetic coupling is performed according
to API 685 flushing plan no.31S. Thereby the pumped
medium is led to magnetic coupling (connection „F“)
from pump discharge through a cyclone separator.
The cyclone separator separates the solids content
from the pumped medium and returns them to
suction.
Clean flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses

7.3.5 Flushing plan no. 31SE according to API 685

Flushing of magnetic coupling is performed according
to API 685 flushing plan no.31SE. Thereby the
pumped medium is led to magnetic coupling
(connection „F“) from pump discharge through a
cyclone separator and a magnetic separator. The
cyclone separator separates the solids content from
pumped medium and returns them to suction. The
cleaned flushing medium runs afterwards through the
magnetic separator, which separates even the
smallest metallic parts from the medium. Cleaning of
magnetic separator should be done regularly
independently from contamination of medium.
Clean flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses.

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Page 31 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

8.0 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM
Pump overheats and seizes

Bearings have short life

⇓

⇓

Pump vibrates or is noisy

⇓

⇓

Magnetic coupling has short life

⇓

⇓

Magnetic coupling leaks excessively

⇓

z

z z

z z

z
z
z

z z Foot valve too small. Investigate replacing the foot valve
z z Foot valve partially clogged. Clean foot valve
z z

z Total head of system lower than pump design

z Specific gravity of liquid different from design. Consult Flowserve
z

z z

B. MECHANICAL TROUBLES

z z z z z z

z

z z z

z z z z z

z
z
z Leakage under sleeve due to joint failure. Replace joint and check for damage

⇓

Pump requires excessive power

⇓

⇓

Pump loses prime after starting

⇓

⇓

Insufficient pressure developed

⇓

⇓

Insufficient capacity delivered

⇓

⇓

Pump does not deliver liquid

⇓

⇓

PROBABLE CAUSES POSSIBLE REMEDIES

⇓

⇓

A. SYSTEM TROUBLES

z Pump not primed. Check complete filling

z z

Pump or suction pipe not completely filled with

liquid.

z

Operation at very low capacity. Measure value and check minimum permitted

z z

z

z z z z z

z Rotating part rubbing on stationary part

Bearings worn Replace bearings

z z z

z z

Suction lift too high or level too low.

z z z

Shaft bent. Check shaft runouts within acceptable values

Excessive amount of air or gas in liquid. Check and purge from pipes

z z

Air or vapour pocket in suction line. Check suction line design for pockets

z

Air leaks into suction line. Check airtight pipe then joints and gaskets

z

Air leaks into pump through mechanical seal,

sleeve joints, casing joint or pipe lugs.

z z

Inlet of suction pipe insufficiently submerged. Check cut out system design

z z z

z z

z z
z z

Total head of system higher than differential
head of pump.

head.

Viscosity of liquid differs from that for which

designed.

Operation at high capacity.

Misalignment due to pipe strain.

Improperly designed foundation.

internally.

Wearing ring surfaces worn. Replace worn wear ring/ surfaces
Impeller damaged or eroded. Replace impeller and check reason

Magnetic coupling improperly installed.

Check and complete filling
Check NPSHa>NPSHr, proper submergence,

losses at strainers / fittings

Check airtight assembly then joints and
gaskets

Check discharge head and head losses in
discharge pipe at the valve settings. Check
back pressure is not too high

Throttle at discharge valve or ask Flowserve if
the impeller can be trimmed

Consult Flowserve

Measure value and check maximum
permitted

Check the flange connections and eliminate
strains using elastic couplings or a method
permitted

Check setting of baseplate: tighten, adjust,
grout base as required

Check for signs of this and consult Flowserve
if necessary

Check alignment of faces or damaged parts
and assembly method used

Page 32 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

FAULT SYMPTOM
Pump overheats and seizes

Bearings have short life

⇓

⇓

Pump vibrates or is noisy

⇓

⇓

Magnetic coupling has short life

⇓

⇓

Magnetic coupling leaks excessively

⇓

z z z z z

z z z z z

z z z

C. ELECTRICAL TROUBLES
z z

⇓

Pump requires excessive power

⇓

⇓

Pump loses prime after starting

⇓

⇓

Insufficient pressure developed

⇓

⇓

Insufficient capacity delivered

⇓

⇓

Pump does not deliver liquid

⇓

⇓

PROBABLE CAUSES POSSIBLE REMEDIES

⇓

⇓

z z z

z z z
z z

z z

Excessive thrust caused by a mechanical

z z

Excessive grease in ball bearings. Check method of regreasing

z z

z z

z z

z z

z Motor running too slow, Check motor terminal box connections

Incorrect type of magnetic coupling for

Impeller out of balance resulting in vibration. Check and consult Flowserve

Abrasive solids in liquid pumped. Check and consult Flowserve

Internal misalignment due to improper repairs

z z

operating conditions.
Shaft running off centre because of worn

bearings or misalignment.

Magnetic coupling was run dry.

causing impeller to rub.

failure inside the pump.

Lack of lubrication for bearings.

Improper installation of bearings

Damaged bearings due to contamination.

Wrong direction of rotation. Reverse 2 phases on motor terminal box

Consult Flowserve
Check misalignment and correct if necessary.

If alignment satisfactotry check bearings for
excessive wear

Check mechanical seal condition and source
of dry running and repair

Check method of assembly, possible damage
or state of cleanliness during assembly

Check wear condition of Impeller, its
clearances and liquid passages

Check hours run since last change of
lubricant, the schedule and its basis

Check method of assembly, possible damage
or state of cleanliness during assembly and
type of bearing used

Check contamination source and replace
damaged bearings

component etc are included in the Data Book. If

9.0 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.

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.

10.0 OTHER RELEVANT
DOCUMENTATION AND MANUALS

10.1 Supplementary user instructions

Supplementary instructions determined from the
contract requirements for inclusion into user
Instructions such as for a driver, instrumentation,
controller, sub-d river, seals, sealant system, mounting

Page 33 of 37

10.2 Change notes

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

10.3 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:
Pump Handbook, 2
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.

nd

edition, Igor J. Karassik et al,

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Page 34 of 37

10.4 Abbreviations

Quantity ISO unit

ISO unit

abbreviation

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Multiplication

Factor

1

US unit

US unit

Abbreviation

Area

Capacity or
Flow rate

Force Newton N 0.2248 Pound force lbf

Head meter m 3.28084 feet ft

Heat Energy kilo joule kJ 0.9478

Length

Mass

Moment of
Inertia

Noise 4 decibel dBA

Power kilowatt kW 1.34102 horsepower hp

Pressure 2 bar bar 14.5 pounds/in.² psi

Rotational
Speed

Stress

Temperature

square meter

square centimeter

Cubic

meter/hour

meter

millimeter

micrometer

kilogram

gram

kilogram

square meter

revs per minute r/min

Newton/square

millimetre

degrees

Celsius

m²

cm²

m³/h 4.4033

m

mm

µm

kg

g

kg.m² 23.73

N/mm² 145.0 pounds/in.² psi

°C (1.8 x °C) + 32

10.764

0.155

3.28084

0.03937

0.00003937

2.20462

0.035274

square feet
square inch

US Gallons/

minute

British

thermal unit

feet
inch
inch

pounds
ounces

pounds

square feet

degrees

Fahrenheit

ft²

in.²

US gpm

Btu

ft
in.
in.

lb.

oz.

lb.ft²

°F

Torque Newton meter Nm 0.7376 pound.feet lbf.ft

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

Velocity

Vibration 3

Viscosity

Volume

meter/second

millimeter/second

millimetre/

second

square millimetre/

second or centiStoke

cubic meter

liter

m/s

mm/s

mm/s

cSt

m³

l

3.28084

0.03937

0.03937

264.2

33.81

feet/second

inches/second

inches/
second

US Gallons

fluid ounce

ft/sec

in./sec

in./sec

US gal.

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

Page 35 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

AFTERMARKET DIRECTORY

Flowserve (Austria) GmbH

Industriestraße B/6 Fax: +43 / 2236 / 31940
A-2345 Brunn/Geb., AUSTRIA Mail: [e-mail]

IF YOU NEED ANY INFORMATIONS ON PRICES, QUOTATIONS FOR PARTS, FIELD

SERVICE, REPAIRS... PLEASE CONTACT DIRECTLY OUR SPECIALISTS BY DIALING

OUR PHONE NUMBER AND HIS EXTENSION

MANAGER
PARTS QUOTATIONS
PARTS ORDER HANDLING
FIELD SERVICE / REPAIRS
SECRETARY
EXPORT / INVOICING

MESSAGES CAN BE LEFT ALSO ON OUR ANSWERING MACHINE

IMPORTANT NOTES:

OUR ADDRESS

Tel: +43 / 2236 / 31530

EXT. 297
EXT. 236
EXT. 237
EXT. 205
EXT. 232
EXT. 238

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:

- STARTUP AND COMMISSION SERVICE DIAL: EXT 205

-PLEASE ASK FOR OUR SPECIAL RATES

- PLEASE ASK ALSO AFTER THE WARRANTY PERIOD FOR OUR SERVICE
PERSONAL FOR REPAIRING AND SERVICING YOUR PUMPS

Please quote your service:

Name of Company: ………………………… Pumpdata:
Contact person:.……………………….. Type: ………………….

Telephone: …………….…………........... Serialno.: …….......…….....

Fax: ...…………………………………....

e-mail: ………………………………………
Country: ………………………………………

Customer Service Fax: [phone]

Page 36 of 37

ERPN-M USER INSTRUCTIONS ENGLISH 02-08

Your Flowserve factory contacts:

Flowserve (Austria) GmbH
Industriestraße B6
2345 Brunn am Gebirge
Austria

Telefon: [phone]
Fax: [phone]
Service & Repair Fax: [phone]
E.mail: [e-mail]

FLOWSERVE REGIONAL
SALES OFFICES:

USA and Canada

Flowserve Corporation
5215 North O’Connor Blvd.,
Suite 2300
Irving, Texas 75039-5421 USA
Telephone [phone]
Fax [phone]

Europe, Middle East, Africa

Worthing S.P.A.
Flowserve Corporation
Via Rossini 90/92
20033 Desio (Milan) Italy
Telephone [phone]
Fax [phone]

Latin America and Caribbean

Flowserve Corporation
6840 Wynnwood Lane
Houston, Texas 77008 USA
Telephone [phone]
Fax [phone]

Asia Pacific

Flowserve Pte. Ltd
200 Pandan Loop #06-03/04
Pantech 21
Singapore 128388
Telephone [phone]
Fax [phone]

Page 37 of