Flowserve MENBLOC User Manual

USER INSTRUCTIONS

MENBLOC centrifugal pump

Close-coupled single-stage, axial suction, vertical discharge
type centrifugal motopump

PCN=71576296 – 02/13 (E) Original instructions.

Installation

Operation

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

CONTENTS

1 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

1.7 Nameplate and safety labels ........................... 8

1.8 Specific machine performance ........................ 8

1.9 Noise level ....................................................... 9

2 TRANSPORT AND STORAGE ........................... 11

2.1 Consignment receipt and unpacking ............. 11

2.2 Handling ........................................................ 11

2.3 Lifting ............................................................. 13

2.4 Storage .......................................................... 13

2.5 Recycling and end of product life .................. 13

3 PUMP DESCRIPTION ......................................... 13

3.1 Configurations ............................................... 13

3.2 Nomenclature ................................................ 15

3.3 Coverage charts ............................................ 16

4 INSTALLATION .................................................... 17

4.1 Location ......................................................... 17

4.2 Foundation..................................................... 17

4.3 Piping ............................................................. 17

4.4 Electrical connections .................................... 19

4.5 Protection systems ........................................ 20

Page

6 MAINTENANCE ................................................... 25

6.1 General .......................................................... 25

6.2 Maintenance schedule ................................... 25

6.3 Spare parts .................................................... 27

6.4 Recommended spares and consumable items27

6.5 Tools required ................................................ 28

6.6 Disassembly .................................................. 30

6.7 Assembly ....................................................... 31

7 FAULTS; CAUSES AND REMEDIES .................. 33

8 PARTS LIST AND DRAWINGS ........................... 34

8.1 Sectional drawings ........................................ 34

8.2 Sectional drawings part list ............................ 36

8.3 General arrangement drawing ....................... 36

9 CERTIFICATION ................................................. 37

10 OTHER RELEVANT DOCUMENTATION AND

MANUALS ....................................................... 37

10.1 Supplementary User Instructions ................ 37

10.2 Change notes .............................................. 37

10.3 Additional sources of information ................ 37

Page

5 COMMISSIONING, START-UP, OPERATION AND

SHUTDOWN ................................................... 21

5.1 Direction of rotation ....................................... 21

5.2 Guarding ........................................................ 21

5.3 Priming and auxiliary supplies ....................... 21

5.4 Starting the pump .......................................... 22

5.5 Running the pump ......................................... 22

5.6 Stopping and shutdown ................................. 23

5.7 Hydraulic, mechanical and electrical duty ..... 24

5.8 Pumps for Food Use or Potable Water ......... 24

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MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

INDEX

Additional sources (10.3) ....................................... 37

Assembly (6.7) ....................................................... 31

ATEX marking (1.6.4.2) ........................................... 7

CE marking and approvals (1.2) .............................. 4

Certification (9) ...................................................... 37

Change notes (10.2) .............................................. 37

Cleaning prior to operation (5.8.1) ........................ 25

Commissioning, start-up, operation (5) ................. 21

Compliance, ATEX (1.6.4.1) .................................... 6

Configurations (3.1) ............................................... 13

Copyright (1.4) ......................................................... 4

Coverage charts (3.3) ............................................ 16

Direction of rotation (5.1) ....................................... 21

Disassembly (6.6) .................................................. 30

Discharge piping (4.3.3) ....................................... 19

Disclaimer (1.3) ........................................................ 4

Dismantling (see 6.6, Disassembly) ...................... 30

Drawings (8.1) ....................................................... 34

Duty conditions (1.5) ................................................ 4

Ecodesign (1.8.1) ..................................................... 9

Electrical connections (4.4) ................................... 19

Electrical supply (4.4.2) ........................................ 20

End of product life (2.5) ......................................... 13

Fastener torques (see 6.7.1) ................................. 31

Faults; causes and remedies (7) ........................... 33

Final checks (4.3.4) .............................................. 19

First pump start up (5.4.2) .................................... 22

Foundation (4.2) .................................................... 17

Forces and moments (see 4.3.1) ........................... 17

General arrangement drawing (8.3) ...................... 36

Guarding (5.2) ........................................................ 21

Handling (2.2) ........................................................ 11

Hydraulic, mechanical and electrical duty (5.7) ..... 24

Inspection (6.2.2 and 6.2.3) ................................... 26

Installation (4) ........................................................ 17

Internal coating (6.2.5) ........................................... 27

Lifting (2.3) ............................................................. 13

Location (4.1) ......................................................... 17

Maintenance (6) ..................................................... 25

Maintenance schedule (6.2) .................................. 25

Mechanical seal (see 6.2.4 and 6.4.2) 27

Mechanical seal assembly (6.7.2) ......................... 32

Nomenclature (3.2) ................................................ 15

Nameplate (1.7.1) .................................................... 8

Operating limits (see 3.1) ...................................... 13

Ordering spare parts (6.3.1) .................................. 27

Parts lists (8.2) ....................................................... 36

Piping (4.3) ............................................................ 17

Protection systems (4.5) ........................................ 20

Pump masses (2.2.2) ............................................ 12

Reassembly (see 6.7, Assembly) .......................... 31

Receipt and unpacking (2.1) .................................. 11

Recommended spares (6.4) .................................. 27

Recycling (2.5) ....................................................... 13

Replacement parts (see 6.3 and 6.4) .................... 27

Page

Page

Running the pump (5.5) ......................................... 22

Safety action (1.6.3) ................................................. 5

Safety labels (1.7.2) ................................................. 8

Safety markings (1.6.1) ............................................ 5

Safety, protection systems (see 1.6 and 4.5)

Sectional drawings (8.1) ........................................ 34

Sound level (see 1.9, Noise level) ........................... 9

Sources, additional information (10.3) ................... 37

Spare parts (6.3) .................................................... 27

Specific machine performance (1.8) ........................ 8

Standard maintenance (6.2.1) .............................. 26

Starting the pump (5.4) .......................................... 22

Stop/start frequency (5.5.5) ................................... 23

Stopping and shutdown (5.6) ................................. 23

Storage, pump (2.4) ............................................... 13

Storage, spare parts (6.3.2) ................................... 27

Suction piping (4.3.2) ............................................ 18

Supplementary manuals or information sources ... 37

Tools required (6.5)................................................ 28

Torques for fasteners (see 6.7.1) .......................... 31

Transport and storage (2) ..................................... 11

Trouble-shooting (see 7) ........................................ 33

Vibration (5.5.4) ..................................................... 23

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MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

1 INTRODUCTION AND SAFETY

1.1 General

These instructions must always be kept

close to the 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,
utilizing 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 and regulations.

These instructions must 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. Failure to follow
and apply the present user instructions is
considered to be misuse. Personal injury,
product damage, delay or failure caused by
misuse are not covered by the Flowserve
warranty.

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) “minimum efficiency for some water pumps
(Ecodesign)” 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
and Approvals.
To confirm the Approvals applying and if the product is
CE marked, check the serial number plate markings
and the Certification. (See section 9, Certification.)

1.3 Disclaimer

Information in these User Instructions is believed
to be reliable. In spite of all the efforts of Flowserve
Corporation 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
organizations. 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 authorized Flowserve parts and
accessories is considered to be misuse. Damage or
failure caused by misuse is not covered by the
Flowserve 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.

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 the written agreement of Flowserve
before start up.

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MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

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 markings
are:

1.6.3 Safety action

This is a summary of conditions and actions to
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.

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 substances
and toxic fluid” safety instructions where non­compliance 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 explosive atmosphere
zone marking according to ATEX. It is used in safety
instructions where non-compliance in the hazardous
area would cause the risk of an explosion.

NEVER DO MAINTENANCE WORK

WHEN THE UNIT IS CONNECTED TO POWER

GUARDS MUST NOT BE REMOVED WHILE

THE PUMP IS OPERATIONAL

DRAIN THE 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 ºC (482 ºF), partial decomposition of fluoro­elastomers (example: Viton) will occur. In this
condition these are extremely dangerous and skin
contact must be avoided.

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 lb) use a crane
appropriate for the mass and in accordance with
current local regulations.

This symbol is used in safety instructions to
remind not to rub non-metallic surfaces with a dry
cloth; ensure cloth is damp. It is used where non­compliance in the hazardous area would cause the
risk of an explosion.

This sign is not a safety symbol but indicates

an important instruction in the assembly process.

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 coordinate repair activity with operations and
health and safety personnel, and follow all plant
safety requirements and applicable safety and health
laws and regulations.

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
be avoided.

NEVER APPLY HEAT TO REMOVE
IMPELLER
Trapped lubricant or vapor could cause an explosion.

HOT (and cold) PARTS
If hot or freezing components or auxiliary heating
supplies can present a danger to operators and
persons entering the immediate area action must be
taken to avoid accidental contact. If complete
protection is not possible, the machine access must
be limited to maintenance staff only, with clear visual
warnings and indicators to those entering the
immediate area. Note: bearing housings must not be
insulated and drive motors and bearings may be hot.

If the temperature is greater than 68 °C (155 °F)
or below -5 °C (23 °F) in a restricted zone, or
exceeds local regulations, action as above shall
be taken.

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MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

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.

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

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 minimize 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 may need to
be adjusted to comply with the duty following the
run-up process. (See section 5, Commissioning
start-up, 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 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 backpressure on the pump may
overload the motor and cause cavitation. Low flow
rates may cause a reduction in pump/bearing life,
overheating of the pump, instability and
cavitation/vibration.

1.6.4 Products used in potentially explosive
atmospheres

The following instructions for pumps and pump
units when installed in potentially explosive
atmospheres must be followed to help ensure
explosion protection.

The terminology and procedures ensure that the
installed pump is in compliance with the European
Directive 94/9/EC, known as the ATEX Directive, which
is mandatory in Europe and may also be specified in
other countries. Where applicable, both electrical and
non-electrical equipment must meet the requirements
94/9/EC.

Even if the installation is in a region where ATEX is not
the applicable regulation, the general measures
described shall be followed to ensure safe operation.

The measures are explained under the headings of:

• Avoiding excessive surface temperature

• Preventing build up of explosive mixtures

• Preventing the generation of sparks

• Preventing leakages

• Maintaining the pump to avoid hazard

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 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
pumps sets with a VFD, the ATEX Certification for the
motor must state that it is covers the situation where
electrical supply is from the VFD. This particular
requirement still applies even if the VFD is in a safe
area.

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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 IIC 135 ºC (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 EN 13463-5)

Gas Group (Equipment Category 2 only)
IIA – Propane (typical)
IIB – Ethylene (typical)
IIC – Hydrogen (typical)

Maximum surface temperature (Temperature 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, 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

115 °C (239 °F) *
180 °C (356 °F) *
275 °C (527 °F) *
400 °C (752 °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 the pump could be
installed in different hazardous atmospheres. In this
case the user is responsible for ensuring that the
pump surface temperature does not exceed that
permitted in the particular hazardous atmosphere.

If an explosive atmosphere exists during the
installation, do not attempt to check the direction of
rotation by starting the pump unfilled. Even a short
run time may give a high temperature resulting from
contact between rotating and stationary
components. Furthermore, confinement of liquid in
the pump and pipes must be avoided (valve closed).
If the liquid heats up this may cause excessive
pressure and lead to bursting of pump 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.

Avoid mechanical, hydraulic or electrical overload by
using motor overload trips, temperature monitor or a
power monitor and make routine vibration monitoring
checks.

In dirty or dusty environments, regular checks must
be made and dirt removed from areas around close
clearances, bearing housings and motors.

1.6.4.4 Preventing the build up of explosive
mixtures

ENSURE PUMP IS PROPERLY FILLED AND

VENTED AND DOES NOT RUN DRY.
Ensure 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 power monitor).

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

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1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical
contact, the coupling guard must be non-sparking.
To avoid the potential hazard from random induced
current generating a spark the ground contact on the
baseplate must be used.

Avoid electrostatic charge: do not rub non­metallic surfaces with a dry cloth, ensure cloth is
damp.
Where applicable the coupling must be selected to
comply with 94/9/EC and correct alignment must be
maintained.

Additional requirements for metallic pumps on
non-metallic baseplates.

When metallic components are fitted on a non­metallic baseplate they must be individually earthed
(grounded).

1.6.4.6 Preventing leakage

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.)

1.7 Nameplate and safety labels

1.7.1 Nameplate

For details of nameplate, see the Declaration of
Conformity, or separate documentation included with

these User Instructions.

1.7.2 Safety labels

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.

Where there is the potential hazard of a loss of a
seal barrier fluid or external flush, the fluid must be
monitored.

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

1.6.4.7 Maintenance to avoid the hazard

CORRECT MAINTENANCE IS REQUIRED
TO AVOID POTENTIAL HAZARDS WHICH GIVE A
RISK OF EXPLOSION

The responsibility for compliance with
maintenance instructions is with the plant
operator.

To avoid potential explosion hazards during
maintenance, the tools, cleaning and painting
materials used must not give rise to sparking or
adversely affect the ambient conditions.

Oil lubricated units only:

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.

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1.8.1 Ecodesign

EU Regulation 547/2012 of the Directive
2009/125/EC, for the minimum efficiency of defined
classes of water pumps, requires that products must
show their Minimum Efficiency Index (MEI) value.
The EU Benchmark MEI ≥ 0.70.
Also product information must be available to users.
Performance curves will have been provided with
the quotation or order or are available at
flowserve.com.
The efficiency of a pump with trimmed impeller is
usually lower than that of a pump with the full
impeller diameter. The trimming of the impeller will
adapt the pump to a fixed duty point, leading to
reduced energy consumption. The minimum
efficiency index (MEI) is based on the full impeller
diameter.
The operation of this water pump with variable duty
points may be more efficient and economic when
controlled, for example, by the use of a variable
speed drive that matches the pump duty to the
system.
Information on benchmark efficiency is available at
www.europump.org/efficiencycharts.

1.9 Noise level

Attention must be given to the exposure of
personnel to the noise, and local legislation will
define when guidance to personnel on noise
limitation is required, and when noise exposure
reduction is mandatory. This is typically 80 to 85
dBA.

The usual approach is to control the 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 attention
is drawn to the following table to give an indication of
equipment noise level so that you can take the
appropriate action in your plant.

Pump noise level is dependent on a number of
operational factors, flow rate, pipework design and
acoustic characteristics of the building, and so the
values given are subject to a 3 dBA tolerance and
cannot be guaranteed.

Similarly the motor noise assumed in the “pump and
motor” noise is that typically expected from standard
and high efficiency motors when on load directly
driving the pump. Note that a motor driven by an
inverter may show an increased noise at some
speeds.

If a pump unit only has been purchased for fitting
with your own driver then the “pump only” noise
levels in the table should be combined with the level
for the driver obtained from the supplier. Consult
Flowserve or a noise specialist if assistance is
required in combining the values.

It is recommended that where exposure approaches
the prescribed limit, then site noise measurements
should be made.

The values are in sound pressure level LpA at 1 m
(3.3 ft) from the machine, for “free field conditions
over a reflecting plane”.

For estimating sound power level LWA (re 1 pW)
then add 17 dBA to the sound pressure value.

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Motor size
and speed

kW (hp)

< 0.55 (< 0.75) 72 72 64 65 62 64 62 64

0.75 (1) 72 72 64 66 62 64 62 64

1.1 (1.5) 74 74 66 67 64 64 62 63

1.5 (2) 74 74 66 71 64 64 62 63

2.2 (3) 75 76 68 72 65 66 63 64
3 (4) 75 76 70 73 65 66 63 64
4 (5) 75 76 71 73 65 66 63 64

5.5 (7.5) 76 77 72 75 66 67 64 65

7.5 (10) 76 77 72 75 66 67 64 65
11 (15) 80 81 76 78 70 71 68 69
15 (20) 80 81 76 78 70 71 68 69

18.5 (25) 81 81 77 78 71 71 69 71
22 (30) 81 81 77 79 71 71 69 71
30 (40) 83 83 79 81 73 73 71 73
37 (50) 83 83 79 81 73 73 71 73
45 (60) 86 86 82 84 76 76 74 76
55 (75) 86 86 82 84 76 76 74 76

75 (100) 87 87 83 85 77 77 75 77

90 (120) 87 88 83 85 77 78 75 78
110 (150) 89 90 85 87 79 80 77 80
150 (200) 89 90 85 87 79 80 77 80
200 (270)
300 (400) 87 90 85 86

1 The noise level of machines in this range will most likely be of values which require noise exposure control, but typical values are
inappropriate.

Note: for 1 180 and 960 r/min reduce 1 450 r/min values by 2 dBA. For 880 and 720 r/min reduce 1 450 r/min values by 3 dBA.

3 550 r/min 2 900 r/min 1 750 r/min 1 450 r/min

Pump

only

1 1 1 1

Pump and

Typical sound pressure level LpA at 1 m reference 20 µPa, dBA

motor

Pump

only

Pump and

motor

Pump

only

85 87 83 85

Pump and

motor

Pump

only

Pump and

motor

Page 10 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

In areas where the staff has to intervene, remember
that when the level of the sound pressure is:

• below 70 dBA: it is not necessary to take special
precautions.

• above 70 dBA: people working continuously in
the machine room must be supplied with
protective devices against noise.

• below 85 dBA: no particular measures need to
be taken for casual visitors staying in the room
during a limited period.

• above 85 dBA: the room must be considered as
a dangerous area because of the noise and a
warning sign must be fixed at each entry
warning the people coming into the room, even
for a short period, that they must wear hearing
protection.

• above 105 dBA: special hearing protection
adapted to this noise level and to the spectral
noise components must be installed and a
warning sign to this effect erected at each entry.
The staff in the room must wear ear protection.

Make sure that the noise, which travels through the
walls and windows, does not generate too high
noise levels in the machine room's surroundings.

2 TRANSPORT AND STORAGE

2.1 Consignment receipt and unpacking

Immediately after receipt of the equipment it must be
checked against the delivery and shipping
documents for its completeness and that there has
been no damage in transportation.

Any shortage and or damage must be reported
immediately to Flowserve and received in writing
within one month of receipt of the equipment. Later
claims cannot be accepted.

Check any crate, boxes and wrappings for any
accessories or spare parts that may be packed
separately with the equipment or attached to
sidewalls of the box or equipment.

Each product has a unique serial number. Check
that this number corresponds with that advised and
always quote this number in correspondence as well
as when ordering spare parts or further accessories.

2.2 Handling

2.2.1 General instructions concerning handling

Boxes, crates, pallets or cartons may be unloaded
using forklift vehicles or slings dependent on their
size and construction. See 2.3.1 for positioning of
slings.

To lift heavy pieces above 25 kg (55 lb), use a winch
adapted to the mass and in accordance with the
current local regulations.

To lift machines or pieces with one or several
suspension rings, only use hooks and chains in
compliance with the local regulations concerning
safety. Never put cables, chains or ropes directly on
or in the suspension rings. Cables, chains or lifting
ropes must never present excessive bending.

Never bend the lifting hooks, suspension rings,
chains, etc., which should only be made to endure
stresses within, calculated limits. Remember that the
capacity of a lifting device decreases when the
direction of the lifting force direction makes an angle
with the device axis.

To increase the safety and the efficiency of the lifting
device, all the lifting elements must be as
perpendicular as possible. If necessary a lifting
beam can be placed between the winch and the
load.

When heavy pieces are lifted up, never stay or work
under the load or in the area, which could be in the
path of the load if it were to swing or fall away.
Never leave a load hanging from a winch. The
acceleration or the slowing-down of lifting equipment
must stay in the safety limits for the staff.

A winch must be positioned in such a way that the
load will be raised perpendicularly. Where possible
necessary precautions must be taken to avoid the
swing of the load, using for example two winches
making approximately the same angle, below 30°,
with the vertical.

Page 11 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

2.2.2 Pump unit and motor masses

Speed 1450 min-1

MENBLOC

50-32-125/0.55-4 25 55 11 24
50-32-160/0.55-4 35 77 11 24
50-32-200/1.2-4 46 101 18 40
50-32-200L/1.5-4 50 110 17 37
65-40-125/0.55-4 31 68 11 24
65-40-160/0.75-4 33 73 13 29
65-40-200L/1.5-4 49 108 17 37
65-40-250/2.2-4 63 139 23 51
65-40-250L/4-4 76 168 29 64
65-50-125/0.75-4 35 77 13 29
65-50-160/1.2-4 52 115 18 40
65-50-200L/3.3-4 63 139 25 55
65-50-250L/4-4 76 168 29 64
80-65-125/1.2-4 47 104 18 40
80-65-160/1.5-4 53 117 17 37
80-65-160/2.2-4 59 130 23 51
80-65-200L/3.3-4 70 154 25 55
80-65-200L/4-4 74 163 29 64
80-65-250L/8.2-4 128 282 65 143
80-65-315/15-4 * 268 591 163 359
100-80-160/1.5-4 56 123 17 37
100-80-160/2.2-4 62 137 23 51
100-80-200L/8.2-4 121 267 65 143
100-80-250L/8.2-4 134 295 65 143
100-80-250L/12-4 137 302 68 150
100-80-315/15-4 * 277 611 163 359
125-100-200L/8.2-4 137 302 65 143
125-100-250L/12-4 146 322 68 150
125-100-315/22-4 * 320 705 196 432
125-100-315L/30-4 * 382 842 256 564
150-125-250L/15-4 * 283 624 163 359
150-125-250L/22-4 * 317 699 196 432

Unit mass Motor mass

kg lb kg lb

* IP 55 motor (added pump shaft)

Pieces below 25 kg (55 lb) can be manually
handled but operators should wear protective gloves
and exercise caution.

Speed 2900 min-1

MENBLOC

50-32-125/1.2-2 28 62 13 29
50-32-160/2.2-2 46 101 21 46
50-32-160/3-2 49 108 24 53
50-32-200/4.6-2 57 126 29 64
50-32-200/6.5-2 79 174 41 90
50-32-200L/8.5-2 82 181 49 108
50-32-200L/13-2 100 220 67 148
65-40-125/2.2-2 44 97 21 46
65-40-125/3-2 47 104 24 53
65-40-160/4.6-2 55 121 29 64
65-40-200L/8.5-2 83 183 49 108
65-40-200L/13-2 101 223 67 148
65-40-250/13-2 108 238 67 148
65-40-250/16-2 119 262 78 172
65-40-250L/18.5-2 * 200 441 137 302
65-40-250L/22-2 * 220 485 150 331
65-40-250L/30-2 * 298 657 233 514
65-50-125/3-2 49 108 24 53
65-50-125/4.6-2 54 119 29 64
65-50-160/4.6-2 63 139 29 64
65-50-160/6.5-2 75 165 41 90
65-50-200L/18.5-2 * 189 417 137 302
65-50-200L/22-2 * 220 485 150 331
80-50-250L/30-2 * 297 655 233 514
80-65-125/3-2 53 117 24 53
80-65-125/4.6-2 58 128 29 64
80-65-125/6.5-2 70 154 41 90
80-65-160/13-2 103 227 67 148
80-65-160/16-2 114 251 78 172
80-65-200L/22-2 * 221 487 150 331
80-65-200L/30-2 * 295 650 233 514
80-65-200L/37-2 * 312 688 249 549
100-80-160/13-2 106 234 67 148
100-80-160/16-2 117 258 78 172
100-80-200L/22-2 * 244 538 150 331
100-80-200L/30-2 * 311 686 233 514
100-80-200L/37-2 * 328 723 249 549

Unit mass Motor mass

kg lb kg lb

* IP 55 motor (added pump shaft)

Pieces below 25 kg (55 lb) can be manually
handled but operators should wear protection gloves
and exercise caution.

Page 12 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

2.3 Lifting

2.3.1 Slinging of motor pumps units

Use handling means in accordance with motor
pump unit mass mentioned on the CE plate. For the
masses of the pumps bare end of shaft see table §

2.2.2 and nameplate.

To avoid distortion, the pump unit

should be lifted as shown.

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

Motor pump unit

When handling always wear gloves, safety
boots and an industrial safety helmet.

For masses above 25 kg (55 lb), manual
handling is forbidden.

2.4 Storage

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

3 PUMP DESCRIPTION

3.1 Configurations

The close-coupled centrifugal electric pump is
designed for the pumping of cold water or any clear
liquids which do not contain solids and are not
corrosive, abrasive or explosive when in contact with
the pump motor unit and its working parts
(Important: for other liquids consult FLOWSERVE for
preliminary advice).

The MENBLOC is a close-coupled single-stage
centrifugal motorpump with an axial inlet and a
vertical outlet. The dimensions of the volute pump
casing, the suction and discharge diameters, and
the casing feet correspond to the standards: DIN
24255 and NF EN 733.

MENBLOC with IP55 motor with an extended motor
shaft

Store the pump in a clean, dry
location away from vibration. Leave piping
connection covers in place to keep dirt and other
foreign material out of pump casing. Turn pump at
intervals to prevent brinelling of the bearings and the
seal faces, if fitted, from sticking.

Do not store pumps starting on the fan guard.
The pump may be stored as above for up to 6

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

The pump must be stored in a non explosive,
ventilated location, sheltered from bad weather, dust
and vibrations.

Page 13 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

MENBLOC with IP55 motor with an added pump
shaft

The reliability of the delivered machine can only be
ensured if it is used according to the conditions
given in this manual. The maximum values specified
in this manual must never be exceeded.

• Installation maximum altitude

................................................ 1000 m (3281 ft)

• Maximum working pressure at discharge

................................................... 16 bar (232 psi)

• Maximum working pressure at suction

................................................... 10 bar (145 psi)

• Maximum pumped fluid temperature

................................................... 110 °C (230 °F)

• Minimum pumped fluid temperature

...................................................... -10 °C (14 °F)

• Maximum ambient temperature

................................................... 40 °C (104 °F)

• Maximum solid suspension

...................................... 50 g/m3 (0.003 lbm/ft3)

• Density ....................................1

• Viscosity ..................................1 mm2/s (31 SSU)

• Frequency .................................................. 50 Hz

• Maximum rotation speed .................. 1450 min-1

...................................................... or 2950 min-1

The maximum speed is shown on the

pump nameplate.

Page 14 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

Group batch number

999999ZZ999

380

400

415

50

50

50

1440

1445

1450

12.00

12.00

12.00

0.86

0.84

0.80

24.30

24.20

24.2

0

IK08 cl F 40°C IP 55 S S1 kg

Group batch number

999999ZZ999

50

50

50

1380

1410

1400

1.20

1.20

1.20

0.90

0.83

0.86

5.00

4.80

2.80

IK08 cl F 40°C IP 55 S S1 kg

∆

∆

∆

220

230

240

380

400

415

50

50

50

1400

1380

1410

1.20

1.20

1.20

0.86

0.90

0.83

4.80

2.90

2.80

Pump type

Manufacture number

Head

Radial/thrust bearing

3.2 Nomenclature

Characteristics shown on the nameplate fixed on the pump are as shown below:
Each pump is supplied with the following nameplate:

Speed of rotation

Flow rate

Year of construction +

Mass
Maximum admissible

Pressure at 20°C (68 °F)
Maximum / minimum

temperature

EU Regulation 547/2012 requires the statement on a product nameplate:

• MEI ≥ 0.10 [--.-] (Between 1st January 2013 and 1st January 2015)

• MEI ≥ 0.40 [--.-] (From 1st January 2015)

Motor plate

Motor type

,

Motor type

Power ≥ 3 kW

Page 15 of 40 flowserve.com

Rated current
Power factor
Rated shaft power

Speed (RPM)
Supply frequency

Supply voltage
Connection

The above values are given for example only.

Rated current
Power factor

Rated shaft power
Speed (RPM)

Supply frequency
Supply voltage
Connection

Power < 3 kW

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

3.3 Coverage charts

3.3.1 1450 min-1 (50 Hz): coverage charts (Q, H)

3.3.2 2900 min-1 (50 Hz): coverage charts (Q, H)

Page 16 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

4 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.

pump housing.
The unit must be mounted on a plane surface. The

holes in the pump and motor feet allow the unit to
be fixed to the foundation.

Never position the motor below the

All equipment must be grounded.

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.

In certain cases a shim is
necessary under the unit for example if the motor
flange touches the supporting surface before the
feet do. It is imperative to shim both the pump and
the motor.

4.3 Piping

The user must verify that the equipment is

isolated from any external sources of vibration.

Protective covers are fitted to the
pipe connections to prevent foreign bodies
entering during transportation and installation.
Ensure that these covers are removed from the
pump before connecting any pipes.

4.3.1 Suction and discharge piping

The dimensions of the pipes do not directly
depend on discharge diameter of the pump:
a) First, choose a flow velocity < 2 m/s 7 ft/s) at

4.2 Foundation

Sound installation and fixing conditions are
imperative to ensure good running. If these

suction, and about 3 m/s (10 ft/s) at discharge.

b) Take into account the available NPSH which

must be greater than the required NPSH of the

pump.
recommendations are not applied, damage may
occur which will not be taken into account in the
contractual guarantee.

piping

Never use pump as a support for

The foundations must be made by a specialized
and competent firm. Ensure that the foundations
are not subjected to vibration from other machines.

The pump motor unit must be installed in a well
ventilated and sheltered area, particularly to avoid
problems of freezing up.

Various possible pump positions are as shown
below:

such a way that their force, due to internal
pressure, may act on the pump flange.

Maximum forces and moments allowed on the
pump flanges vary with the pump size.

Excessive external loads may cause misalignment,
heating of the bearings, vibration and the possible
failure of the pump casing.

Do not mount expansion joints in

Forces and moments applied to the pump flanges
must never exceed the values shown in the
following table.

Page 17 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

Suction

PUMP TYPE

50-32-125 50 2” 32 1”1/4 125 281 95 214 20 148
50-32-160 50 2” 32 1”1/4 125 281 95 214 17 125
50-32-200 50 2” 32 1”1/4 125 281 95 214 17 125
50-32-200L 50 2” 32 1”1/4 125 281 95 214 17 125
65-40-125 65 2”1/2 40 1”1/2 135 304 100 225 22 162
65-40-160 65 2”1/2 40 1”1/2 135 304 100 225 22 162
65-40-200L 65 2”1/2 40 1”1/2 135 304 100 225 20 148
65-40-250 65 2”1/2 40 1”1/2 135 304 100 225 25 185
65-40-250L 65 2”1/2 40 1”1/2 135 304 100 225 25 185
65-50-125 65 2”1/2 50 2” 135 304 100 225 22 162
65-50-160 65 2”1/2 50 2” 135 304 100 225 22 162
65-50-200L 65 2”1/2 50 2” 135 304 100 225 20 148
65-50-250L 65 2”1/2 50 2” 135 304 100 225 25 185
80-65-125 80 3” 65 2”1/2 145 326 105 236 27 199
80-65-160 80 3” 65 2”1/2 145 326 105 236 27 199
80-65-200L 80 3” 65 2”1/2 145 326 105 236 27 199
80-65-250L 80 3” 65 2”1/2 145 326 105 236 27 199
80-65-315 80 3” 65 2”1/2 145 326 105 236 27 199
100-80-160 100 4” 80 3” 180 405 125 281 47 347
100-80-200L 100 4” 80 3” 180 405 125 281 47 347
100-80-250L 100 4” 80 3” 180 405 125 281 47 347
100-80-315 100 4” 80 3” 180 405 125 281 47 347
125-100-200L 125 5” 100 4” 320 720 190 427 95 701
125-100-250L 125 5” 100 4” 330 742 200 450 102 753
125-100-315 125 5” 100 4” 310 697 185 416 92 679
125-100-315L 125 5” 100 4” 310 697 185 416 92 679

DN

mm in. mm in. daN lbf daN lbf m.daN lbf.ft

Fv

Discharge

DN

Fv max Fh max

Forces Moments

Valve

ΣΣΣΣ Mt max

Fh

Fv

Fh

Forces and moments values are applied to the
whole flanges and not flange-by-flange. For their
sharing out on the pump flanges, refer to standard
NFCR 13 931.

Ensure piping and fittings are

flushed before use.

Ensure piping for hazardous liquids is
arranged to allow pump flushing before removal of
the pump.

4.3.2 Suction piping

4.3.2.1 Design of a flooded suction line

The suction line must be as short and direct as
possible, never mount an elbow directly on the
inlet flange of the pump.

Non-return valve

Continuous flow valve

MENBLOC

Flooded suction configuration

a) Avoid sharp elbows or sudden changes of

diameter. Use reducers with ≤ 20° total angle.

b) Arrange the piping so that there are no air

pockets.

c) If high points cannot be avoided in suction line,

install air relief valves.

d) If a strainer is necessary, its net area should

be three or four times the area of the suction
pipe.

e) If an inlet valve is necessary, choose a model

with straight line flow.

Do not tighten flanges before the

final check (see § 4.3.4).

Page 18 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

4.3.2.2 Design of a suction lift line

The inlet pipe must be as short and as direct as
possible, never place an elbow directly on the
pump inlet nozzle.

Valve

Non-return valve

SUFFICIENT
IMMERSION : I

MENBLOC

I ≥ 3 x D

Sump suction configuration

Inlet-strainer

a) Avoid sharp elbows or sudden changes of

diameter. Use reducers with ≤ 20° total angle.

b) Arrange that the suction piping is inclined

upwards towards the pump ensuring that there
are no peaks.

c) If a foot valve is necessary, do not oversize it

because it would generate pulsations (valve
hammering).

Do not tighten flanges before the

final check (see § 4.3.4).

4.3.3 Discharge piping

4.3.3.1 Design of a discharge line

a) If discharge line is provided with a divergent,

its total angle will be between 7° and 12°.

b) Install the discharge valve after the non-return

valve downstream.

The non-return valve will be set in the discharge
pipe to protect the pump from any excessive
pressure surge and from reverse rotation.

If necessary, a pressure gauge or pressure sensor
for pump or system control can be connected on
the piping

Do not tighten flanges before the

final check (see § 4.3.4).

Never wire up the electric motor
before the pump installation has been completely
finished.

4.3.4 Final checks

a) Check the tightening of anchor bolts. Tighten

them if necessary.

b) Check that protective covers on suction and

discharge flanges are removed.

c) Check that holes of piping flanges are parallel

and correspond to those of the pump.

d) Tighten suction and discharge flanges.
e) If it is required, connect piping (hydraulic,

pneumatic, sealing system).

f) Check seal and the working of auxiliary piping.

4.4 Electrical connections

4.4.1 Safety conditions about electrical
connections

Electrical connections must be made
by a qualified Electrician in accordance with
relevant local national and international
regulations. This includes any grounding.

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

Avoid mechanical, hydraulic or electrical
overload by using motor overload trips or a power
monitor and make routine vibration monitoring.

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 doubt, contact
Flowserve for advice.

If the pump assembly has been

stored or is located in a damp atmosphere, the

Control
manometer

isolating resistance of the electric motor must be
checked by a qualified electrician before wiring up.
The resistance must be greater than 5000 ohms
per volt specified on the motor nameplate.

Carry out the ground connections according to the
current local regulations.

Installation of control manometer

Page 19 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

Delta connection

The motor must be protected from
electrical overloading by a thermal overload switch
(overload relay) and fuses, installed between the
isolating switch and motor.

The capacity of the buses and overload relay must
be selected with reference to the full load values
written on the motor nameplate.

The final adjustment of the overload relay setting
should be done following § 5.4.2.

An emergency stop must be fitted.

4.4.2 Electrical supply

Make sure that the voltage of the electrical supply
line is correct for that specified on the motor
nameplate.

Make sure that the supply wires have sufficient
load capacity for the correct running of the
installation.

4.4.3 Wiring Instructions

Motors must be wired:

• Delta connection (∆) for 220/240 V supply or

star connection ( ) for 380/415 V supply for
motors below 3 kW

• Delta connection (∆) for 380/415 V supply for

motors 3.0 kW or larger

• Supply frequency 50 Hz in all cases
Connection wiring diagram for three phase motors
For Direct on-line starting

Star connection

Wire up the motor terminals according to the
voltage supply, in accordance with the nameplate
fixed on the motor and the connection wiring
diagram displayed inside the terminal box, as
shown above.

When using a separate ∆ / Stator

Motors of 3.0 kW or larger may be wired up for
star/delta (∆ /

) starting on 380/415 V supply. All
connections strips must be removed from the
terminal box and 6 wires connected to the ∆ /
starter, as shown above.

4.5 Protection systems

The following protection systems are
recommended particularly if the pump is installed
in a potentially explosive area or is handling a
hazardous liquid. If in doubt consult Flowserve.
If there is any possibility of the system allowing the
pump to run against a closed valve or below
minimum continuous safe flow a protection device
should be installed to ensure the temperature of
the liquid does not rise to an unsafe level.

If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should be fitted to stop the pump or
prevent it from being started. This is particularly
relevant if the pump is handling a flammable liquid.

If leakage of product from the pump or its
associated sealing system can cause a hazard it is
recommended that an appropriate leakage
detection system is installed.

To prevent excessive surface temperatures at
bearings it is recommended that temperature or
vibration monitoring are carried out. See sections

5.5.3 and 5.5.4.
If a defect of cooling can lead to temperature

higher than those acceptable a system of cooling
surveillance must be installed.

Except when explicitly required by the customer in
the specifications, when a possibility of reverse
rotation exists the customer must install a reverse
rotation protection device.

The customer must install all equipment required
to avoid water hammer.

Page 20 of 40 flowserve.com

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ource

5 COMMISSIONING, START-UP,
OPERATION AND SHUTDOWN

These operations must be carried out by

fully qualified personnel.

5.1 Direction of rotation

Starting or operating pumps with
the wrong direction of rotation can be harmful to
the pumps. Ensure that the pump rotation is the
same as the arrow on the pump casing.
It is preferable to check the direction of rotation
before installing the coupling. If not, the pump
must be filled in with the liquid before start-up.

If maintenance work has been
carried out to the site's electricity supply, the
direction of rotation should be re-checked as
above in case the supply phasing has been
altered.

5.2 Guarding

Guarding is supplied fitted to the pump set.

If this has been removed or disturbed ensure
that all the protective guards around the pump
coupling and exposed parts of the shaft are
securely fixed.

5.3 Priming and auxiliary supplies

c) When the pump is totally free of air bubbles,

replace the plugs.

Air escape

Priming of a flooded pump

5.3.2 Priming of a pump on suction lift

* With foot valve:
a) Fill suction pipe and casing with liquid from an

independent source (pressure 1 to 2 bars or
15 to 30 psi).

a) Let air escape by removing the plugs located

on the pump.

b) When the pump is totally free of air bubbles,

replace the plugs.

External s

Air escape

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.

Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.

Ensure the inlet pipe and pump
casing are completely full of liquid before starting
continuous duty operation.

These operations must be carried out by personnel
with approved qualifications.

5.3.1 Priming of a pump with flood suction

a) With the discharge valve closed, fill the pump

by opening the suction valve. Let air escape
by removing the plug located on the pump
casing.

b) When the discharge pipe is full and if there is a

by-pass valve on the check valve, open
slightly the discharge valve and the by-pass of
the check valve.

Priming of sump suction pump with foot valve

*Without foot valve:

Priming may be accomplished by means of venting
system.

Foot valves are not recommended when
the pumped liquid has suspended solid particles.
They may lodge between foot valve seat and disc.

Page 21 of 40 flowserve.com

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5.4 Starting the pump

5.4.1 Bring controls and preparation before the
first starting and after each service call

Necessarily:

a) Check the tightening of the different plugs.
b) Check that the motor bearings are correctly

greased (where regreasing is possible).

c) Guarding is supplied fitted to the

pump set. If this has been removed or
disturbed ensure that all the protective guards

are securely refitted.
d) Open all inlet valves (if existing).
e) Close the outlet valve and the bypass valve
f) Ensure inlet pipe and pump casing are

completely full of liquid.
g) Make sure that the motor fan cowl is not

obstructed or too near to a wall or obstruction.

5.4.2 First pump start-up

Suction valves must be fully open
when pump is running. Never run the pump dry, it
will cause damage.

a) Check the direction of rotation is as indicated

by the arrow on the motor casing or cover,
using a brief burst of power. If it is not correct
then isolate the motor and reverse the

connection of two phases.
b) Start motor and check outlet pressure.
c) If pressure is satisfactory, slowly OPEN the

outlet valve.
d) Do not run the pump with the outlet valve

closed for a period longer than 30 seconds.
e) If NO pressure, or LOW pressure, STOP the

pump. Refer to faultfinding chart for fault

diagnosis.
The pump should run smoothly and without

vibration.
The pump must never run at a capacity of less

than 40 % of that at the best efficiency.

Never remove a plug when the pump is

running.
a) When the unit is normally running, note the

maximum intensities absorbed on each phase.
b) Adjust definitively the circuit breaker for a

slightly greater current to the maximum

noticed current, which must never be superior

to the currents, indicated on the motor

description plate.
c) Check that the voltage between phases in the

motor terminals is correct.

A well-adjusted and maintained circuit breaker
efficiently protects the pump unit.

Any disjunction means that the unit is badly
running (voltage loss, cut phase, misadjustment,
foreign matter in the pump, jamming, etc.).

5.5 Running the pump

5.5.1 Venting the pump

Vent the pump to enable all trapped air to
escape taking due care with hot or hazardous
liquids.

Under normal operating conditions, after the pump
has been fully primed and vented, it should be
unnecessary to re-vent the pump.

5.5.2 Pump fitted with a mechanical seal

A mechanical seal ensures a seal without leakage
and does not need any adjustment. Nevertheless if
a light leakage occurs during start-up, it should
disappear after the initial running in of the rubbing
faces.

NEVER RUN A MECHANICAL

SEAL DRY, EVEN FOR A SHORT WHILE.

SAFETY INSTRUCTIONS WHEN THE PUMP IS
RUNNING:

If hot or freezing components of the machine
can present a danger to operators, they must be
shielded to avoid accidental contact. If a 100 %
protection is not possible; the machine access
must be confined to the maintenance staff only.

If the temperature is greater than 80 °C (176
°F), a warning plate must be clearly placed on the
pump.

It is strictly forbidden to open switch
cupboards, switch boxes, or all other live electric
equipment. If it is necessary to open them in order
to take readings, to carry out tests or adjustments
for example, only a skilled technician may do them
with adapted tools. Make sure that physical
protection against electrical risks is used.

Page 22 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

5.5.3 Bearings

If the pumps are working in a potentially
explosive atmosphere, temperature or vibration
monitoring at the bearings is recommended. If
bearing temperatures are to be monitored it is
essential that a benchmark temperature is
recorded at the commissioning stage and after the
bearing temperature has stabilized.

• Record the bearing temperature (t) and the

ambient temperature (ta)

• Estimate the likely maximum ambient

temperature (tb)

• Set the alarm at (t+tb-ta+5) °C [(t+tb-ta+10) °F]

and the trip at 100 °C (212 °F) for oil
lubrication and 105 °C (220 °F) for grease
lubrication

It is important, particularly with grease lubrication,
to keep a check on bearing temperatures.

After start up the temperature rise should be
gradual, reaching a maximum after approximately

1.5 to 2 hours. This temperature rise should then
remain constant or marginally reduce with time.

5.5.4 Normal vibration levels, alarm and trip

For guidance, pumps generally fall under a
classification for rigid support machines within the
International rotating machinery standards and the
recommended maximum levels below are based
on those standards.

Alarm and trip values for installed
pumps should be based on the actual
measurements (N) taken on site on the bearing
housings of the pump in the fully commissioned as
new condition.

The example (N) value is given for the preferred
operating flow region (typically this may extend to
70 to 120 % of the pump best efficiency point);
outside the preferred flow region the actual
vibration experienced may be multiplied by up to 2.

These standard values can vary with the rotational
speed and the power absorbed by the pump. For
any special case, do not hesitate to consult us.

Measuring vibration at regular intervals will then
show any deterioration in pump or system
operating conditions.

Vibration Velocity - unfiltered

Normal N
Alarm N x 1.25
Shutdown Trip N x 2.0

Horizontal

Configuration

mm/s (in./s) r.m.s.

≤ 5.6 (0.22)
≤ 7.1 (0.28)

≤ 11.2 (0.44)

5.5.5 Stop/start frequency
Pump sets are normally suitable for the number of
equally spaced stop/starts per hour shown in the
table below. Check actual capability of the driver
and control/starting system before commissioning.

Motor rating kW (hp)

Up to 15 (20) 15

Between 15 (20) and 90 (120) 10

90 (120) to 150 (200) 6

Above 150 (200) Refer

Maximum stop/starts

per hour

Where duty and standby pumps are installed it is
recommended that they are run alternately every
week.

5.6 Stopping and shutdown

According to hydraulic conditions of
the installation and its automation degree, stop
and restart procedures can have different forms.
Nevertheless all of them must respect imperatively
the following rules:

5.6.1 Stopping < 1 hour

a) Isolate motor.
b) Avoid reverse rotation of the pump.
c) Make sure that the discharge line pressure

does not reach the foot valve.

5.6.2 Stopping < 1 month

a) Isolate motor.
b) Avoid reverse rotation of the pump.
c) Make sure that the discharge line pressure

does not reach the foot valve.

d) Close the outlet valve. Eventually close the

inlet valve.

e) Switch off external power supply,

flushing/quench, cooling liquid.

5.6.3 Shutdown > 1 month

a) Isolate motor.
b) Avoid reverse rotation of the pump.
c) Make sure that the discharge line pressure

does not reach the foot valve.

d) Close the outlet valve. Eventually close the

inlet valve.

e) Switch off external power supply,

flushing/quench, cooling liquid.

f) Keep the pump fully filled with water. In case

of pumped liquid other than water, drain the
pump entirely.

g) Turn once per week the pump shaft of one or

two turns.

h) Never restart the pump without carrying out

the verifications recommended before starting
(see § 5.4.1).

Page 23 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

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

5.6.4 Restarting in continuous running

a) Ensure that the pump is completely full of

liquid.

b) Ensure a continuous supply with a sufficient

available NPSH.

c) Ensure a backpressure so that the motor

power is not in excess.

d) Respect the starting frequency

imposed by the motor manufacturer.

e) Protect the pump against water hammer

when stopping or starting.

To reduce any possibility of motor thermal stress,
the number of motor starts per hour given in the
table below must not be exceeded:

IP 55 motor – An extended motor shaft

≤ 1.2 kW - 35 starts/hour

1.5 to 3.3 kW - 30 starts/hour
4 to 4.6 kW - 25 starts/hour

6.5 kW - 20 starts/hour

8.2 to 16 kW - 15 starts/hour
IP 55 motor – An added pump shaft

1450 min-1 15 kW

22 kW
30 kW 5 starts/hour

2900 min-1 18.5 kW

22 kW
30 kW
37 kW

The time periods between each start up should be
roughly equal in any one-hour period.

5.7 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
may help the user decide how to evaluate the
implications of any change. If in doubt contact your
nearest Flowserve office.

5.7.1 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.

5.7.2 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.

5.7.3 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 and power
varies as speed ratio cubed.

The new duty, however, will also be dependent on
the system curve. If increasing the 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.

5.7.4 Net positive suction head (NPSHA)

NPSH available (NPSHA) is the head available at
the impeller inlet, above the vapor pressure of the
pumped liquid.

NPSH required (NPSHR) is the minimum head
required at the impeller inlet, above the vapor
pressure of the pumped liquid, to avoid excessive
cavitation and extreme performance degradation.

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
office for advice and details of the minimum
allowable margin for your application.

5.7.5 Pumped flow

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

5.8 Pumps for Food Use or Potable
Water

If the pump has not been specifically ordered for a
food or drinking water application it must not be
used for these types of applications. If it has been
ordered for this type of application the following
recommendations are to be followed.

Page 24 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

5.8.1 Cleaning prior to operation

Pumps that are to be used for a food or drinking
water application should be cleaned before being
put into initial operation and after the installation of
spare parts that are in contact with the liquid.

Cleaning once the pump has been commissioned
will depend on the application and operating
conditions.

The user must ensure that the cleaning
procedures are suitable for the application and
operating conditions, and local regulations.

6 MAINTENANCE

6.1 General

If a belt drive is used, the assembly and
tension of the belts must be verified during regular
maintenance procedure.

In dirty or dusty environments, regular checks
must be made and dirt removed from areas around
close clearances, bearing housings and motors.

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 5.6.

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 guardrails 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".

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. It should include the following:

a) The pump must be completely vented and

drained and rendered inert before any
disassembly operation.

b) Any auxiliary systems installed must be

monitored, if necessary, to ensure they
function correctly.

c) During cleaning of the pump ensure the

compatibility between the cleaning products

and the gaskets.
d) Verify the condition of the gaskets.
e) Gland packings must be adjusted correctly to

give visible leakage and concentric alignment

of the gland follower to prevent excessive

temperature of the packing or follower.

Mechanical seals should present no leakage.
f) Check for any leaks from gaskets and seals.

The correct functioning of the shaft seal must

be checked regularly.
g) Check bearing lubricant level, and if the hours

run show a lubricant change is required.
h) Check that the duty condition is in the safe

operating range for the pump.
i) Check vibration, noise level and surface

temperature at the bearings to confirm

satisfactory operation.

Page 25 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

•

•

Gr

ease nipple

Gr

ease nipple

j) Check the tightness of the connections.
k) Check dirt and dust is removed from areas

around close clearances, bearing housings
and motors.

l) Check coupling alignment and re-align if

necessary.

m) Verify the correct operation of the system.
The equipment used for maintenance and

disassembly in an ATEX zone must be in
conformity with the requirements zone.

Our specialist service personnel can help with
preventative maintenance records and provide

Fig. 1 Evacuation of condensation water

plug

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 7, 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 Standard maintenance

Roller bearing

6.2.2 Routine inspection (daily/weekly)

Fig. 2 Bearing lubrication

The bearings fitted are prepacked with grease at
the factory. When the regreasing period is reached
it is necessary to remove as much of the old
grease as possible with a clean lint free cloth and
repack the bearings with fresh grease.

MAINTENANCE

OPERATION

Starting (example
of a stand-by
pump)

Evacuation of
condensation
water closed IP 55
motor

Lubrication of all
bearing types

If motors fitted
with grease nipple,
lubrication of
motor bearings

FREQUENCY OBSERVATIONS

Weekly

Weekly

Greased for life

Every 3750 hours

of operation

Check the running
state

Increase

frequency for
frequent
stops/starts

• See figure 1
below

Put 15 g (0.53

oz) of ESSO
UNIMEX N3 or
similar grease for
each grease
nipple with the
electro-pump set
stopped.

• See figure 2

made and the appropriate action taken to remedy
any deviations:

a) Check the behavior of the pump while running:

noise level, vibrations, bearings temperature,
flow rate and pressure.

b) Motors with sealed for life bearings require no

maintenance. If grease nipples are fitted,
check running hours since last recharge of
grease or carry out a grease change.

6.2.3 Periodic inspection (six monthly)

a) Check foundation bolts for

security of attachment and corrosion.

b) Check pump-running records for hourly usage

to determine if bearing lubricant requires
changing.

motor pump unit, the user must:

a)



The following checks should be

If a check shows a bad running of the

Refer to the "fault finding chart" chapter

7 of this leaflet to apply the recommended

Open and replace the plastic plugs located

under the casings.

solutions.

b) Ensure that your equipment corresponds to

the arrangements of this leaflet.

c) Contact FLOWSERVE after-sales Department

if the problem persists.

Page 26 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

6.2.4 Mechanical seals

The current maintenance is limited to seal control.
It is necessary to detect any small leakage which
announces the beginning of the deterioration of
friction faces or secondary seal elements (rings,
bellows, synthetic membranes).

It is advisable to stop the pump as soon as
possible. Have an approved seal vendor replace or
repair the seal.

6.2.5 Internal coating

If the pump has an internal coating, this coating
must be inspected periodically.

Any wear or cracks of the coating found must be
immediately repaired. Failure to do this may lead
to accelerated wear of the coating during operation
and corrosion of the exposed base metal,
depending on the material and pumped liquid.

Special attention must be paid to the coating
edges.

Any loss of coating material is considered to be
normal wear and tear on the pump and is not
considered as warranty.

Flowserve has applied the coatings according to
the supplier's instructions but will not be held
responsible for coating wear or cracks that may
develop over time.

6.3 Spare parts

6.3.1 Ordering of spares

Flowserve keeps records of all pumps that have
been supplied. When ordering spares the following
information should be quoted:

1) Pump serial number.

2) Pump size.

3) Part name

4) Part number

5) Number of parts required.

The pump size and serial number are shown on
the pump nameplate.

To ensure continued 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 part) will
invalidate the pump’s safety certification.

6.3.2 Storage of spares

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

6.4 Recommended spares and
consumable items

We advise you to stock the components indicated
by * on the "Parts List".

6.4.1 Gaskets

Change all the gaskets after each dismantling.

6.4.2 Mechanical seal

Change the mechanical seal when it leaks or if it is
damaged (broken, jagged friction face) after
dismantling or reassembly.

Page 27 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

6.5 Tools required

6.5.1 Set of tools for mechanical seal assembly (not supplied by FLOWSERVE)

Tube for stationary Assembly cone Tube to complete

seal ring for rotating seal ring setting of the ring

Round section joint ring ∅ 3 mm (0.12 in.)

SPEED OF ROTATION : N = 1450 min

SET OF TOOLS SET OF TOOLS DIMENSIONS PUMP TYPE

0.1

0.2

+0.5

ØA

ØB

±

ØC

0.2

±

ØD

+0.15

±

E

0.1

0.2

±

F

±

G

-1

L MENBLOC

TUBE FOR

STATION-

ARY SEAL

RING

ASSEMBLY

CONE FOR

ROTATING

SEAL RING

mm 32 29.7 21 18.5 3.3 1.25 3 60

in. 1.26 1.17 0.83 0.73 0.13 0.05 0.12 2.36

mm 36 33.7 24.1 22.5 3.3 1.25 3 60

in. 1.42 1.33 0.95 0.89 0.13 0.05 0.12 2.36

mm 55 52.7 44.1 38.5 3.3 1.25 3 60

in. 2.16 2.07 1.74 1.52 0.13 0.05 0.12 2.36

0.10

ØA

±

ØB

+0.10

ØDg6 L

mm 18 15 12 30

in. 0.71 0.59 0.47 1.18

mm 22 19 16 30

in. 0.87 0.75 0.63 1.18

mm 38 28 24 55

in. 1.50 1.10 0.94 2.16

mm 38 34 32 60

in. 1.50 1.34 1.26 2.36

ØA

0.20

±

ØB

+0.40

ØD

0.10

±

H

+0.10

L MENBLOC

50-32-125/0,55-4;50-32-160/0,55-4;65-40-125/0,55-4
65-40-160/0,75-4;65-50-125/0,75-4

50-32-200/1,2-4;50-32-200L/1,5-4;65-40-200L/1,5-4
65-40-250/2,2-4;65-40-250L/4-4;65-50-160/1,2-4
65-50-200L/3,3-4;65-50-250L/4-4;80-65-125/1,2-4
80-65-160/1,5-4;80-65-160/2,2-4;80-65-200L/3,3-4
80-65-200L/4-4;100-80-160/1,5-4;100-80-160/2,2-4

80-65-250L/8,2-4;80-65-315/15-4;100-80-200L/8,2-4
100-80-250L/8,2-4;100-80-250L/12-4;100-80-315/15-4
125-100-200L/8,2-4;125-100-250L/12-4;
125-100-315/22-4;125-100-315L/30-4;
150-125-250L/15-4;150-125-250L/22-4

0.50

±

MENBLOC

50-32-125/0,55-4;50-32-160/0,55-4;65-40-125/0,55-4
65-40-160/0,75-4;65-50-125/0,75-4

50-32-200/1,2-4;50-32-200L/1,5-4;65-40-200L/1,5-4
65-40-250/2,2-4;65-40-250L/4-4;65-50-160/1,2-4
65-50-200L/3,3-4;65-50-250L/4-4;80-65-125/1,2-4
80-65-160/1,5-4;80-65-160/2,2-4;80-65-200L/3,3-4
80-65-200L/4-4;100-80-160/1,5-4;100-80-160/2,2-4

80-65-315/15-4;100-80-315/15-4;1225-100-315/22-4

80-65-250L/8,2-4;80-65-315/15-4;100-80-200L/8,2-4
100-80-250L/8,2-4;100-80-250L/12-4;100-80-315/15-4
125-100-200L/8,2-4;125-100-250L/12-4;
125-100-315/22-4;125-100-315L/30-4;
150-125-250L/15-4;150-125-250L/22-4

TUBE FOR
ROTATING

SEAL RING

mm 30 26 18.5 5.9 60

in. 1.18 1.02 0.73 0.23 2.36

mm 33 29 22.5 6 60

in. 1.30 1.14 0.89 0.24 2.36

mm 55 46.1 38.5 7.9 60

in.

2.16 1.81 1.52 0.31 2.36

50-32-125/0,55-4;50-32-160/0,55-4;65-40-125/0,55-4
65-40-160/0,75-4;65-50-125/0,75-4

50-32-200/1,2-4;50-32-200L/1,5-4;65-40-200L/1,5-4
65-40-250/2,2-4;65-40-250L/4-4;65-50-160/1,2-4
65-50-200L/3,3-4;65-50-250L/4-4;80-65-125/1,2-4
80-65-160/1,5-4;80-65-160/2,2-4;80-65-200L/3,3-4
80-65-200L/4-4;100-80-160/1,5-4;100-80-160/2,2-4

80-65-250L/8,2-4;80-65-315/15-4;100-80-200L/8,2-4
100-80-250L/8,2-4;100-80-250L/12-4;100-80-315/15-4
125-100-200L/8,2-4;125-100-250L/12-4;
125-100-315/22-4;125-100-315L/30-4;
150-125-250L/15-4;150-125-250L/22-4

Page 28 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

80-65-125/6,5

-

2;80-65-160/13

-

2;100-80-160/13

-2

6.5.2 Set of tools for mechanical seal assembly (not supplied by FLOWSERVE)

Tube for stationary Assembly cone Tube to complete

seal ring for rotating seal ring setting of the ring

Round section joint ring ∅ 3 mm (0.12 in.)

SPEED OF ROTATION : N = 2900 min

SET OF TOOLS SET OF TOOLS DIMENSIONS PUMP TYPE

ØA

ØB

±

±

ØC

ØD

+0.15

±

E

G

±

0.1

F

0.2

±

L

+0.5

0.1

0.2

0.2

mm 32 29.7 21 18.5 3.3 1.25 3 60

in. 1.26 1.17 0.83 0.73 0.13 0.05 0.12 2.36

mm 36 33.7 24.1 22.5 3.3 1.25 3 60

TUBE FOR

STATION-

ARY SEAL

RING

in. 1.42 1.33 0.95 0.89 0.13 0.05 0.12 2.36

mm 42 39.7 30 28.5 3.3 1.25 3 60

in. 1.65 1.56 1.18 1.12 0.13 0.05 0.12 2.36

mm 55 52.7 44.1 38.5 3.3 1.25 3 60

in. 2.16 2.07 1.74 1.52 0.13 0.05 0.12 2.36

ØA

0.10

±

ØB

+0.10

ØDg6 L

0.50

±

-1

MENBLOC

50-32-125/1,2-2

50-32-160/2,2-2;50-32-160/3-2;50-32-200/4,6-2
50-32-200/6,5-2;50-32-200L/8,5-2;50-32-200L/13-2
65-40-125/2,2-2;65-40-125/3-2;65-40-160/4,6-2
65-40-200L/8,5-2;65-40-200L/13-2;65-40-250/13-2
65-50-125/3-2;65-50-125/4,6-2;65-50-160/4,6-2
65-50-160/6,5-2;80-65-125/3-2;80-65-125/4,6-2
80-65-125/6,5-2;80-65-160/13-2;100-80-160/13-2

65-40-250/16-2;65-40-250L/18,5-2;65-40-250L/22-2
65-40-250L/30-2;65-50-200L/18,5-2;65-50-200L/22-2
65-50-250L/30-2;80-65-160/16-2;80-65-200L/22-2
80-65-200L/30-2;80-65-200L/37-2;100-80-160/16-2

100-80-200L/22-2;100-80-200L/30-2;100-80-200L37-2

MENBLOC

ASSEMBLY

CONE FOR

ROTATING

SEAL RING

TUBE FOR
ROTATING

SEAL RING

mm 18 15 12 30

in. 0.71 0.59 0.47 1.18

mm 22 19 16 30

in. 0.87 0.75 0.63 1.18

mm 28 24 20 40

in. 1.10 0.94 0.79 1.57

mm 38 34 32 60

in. 1.50 1.34 1.26 2.36

ØA

0.20

±

ØB

+0.40

ØD

0.10

±

H

+0.10

L MENBLOC

mm 30 26 18.5 5.9 60

in. 1.18 1.02 0.73 0.23 2.36

mm 33 29 22.5 6 60

in. 1.30 1.14 0.89 0.24 2.36

mm 45 37 28.5 7.9 60

in. 1.77 1.46 1.12 0.31 2.36

mm 55 46.1 38.5 7.9 60

in. 2.16 1.81 1.52 0.31 2.36

50-32-125/1,2-2

50-32-160/2,2-2;50-32-160/3-2;50-32-200/4,6-2
50-32-200/6,5-2;50-32-200L/8,5-2;50-32-200L/13-2
65-40-125/2,2-2;65-40-125/3-2;65-40-160/4,6-2
65-40-200L/8,5-2;65-40-200L/13-2;65-40-250/13-2
65-50-125/3-2;65-50-125/4,6-2;65-50-160/4,6-2
65-50-160/6,5-2;80-65-125/3-2;80-65-125/4,6-2
80-65-125/6,5-2;80-65-160/13-2;100-80-160/13-2

65-40-250/16-2;65-40-250L/18,5-2;65-40-250L/22-2
65-40-250L/30-2;65-50-200L/18,5-2;65-50-200L/22-2
65-50-250L/30-2;80-65-160/16-2;80-65-200L/22-2
80-65-200L/30-2;80-65-200L/37-2;100-80-160/16-2

100-80-200L/22-2;100-80-200L/30-2;100-80-200L37-2

50-32-125/1,2-2

50-32-160/2,2-2;50-32-160/3-2;50-32-200/4,6-2
50-32-200/6,5-2;50-32-200L/8,5-2;50-32-200L/13-2
65-40-125/2,2-2;65-40-125/3-2;65-40-160/4,6-2
65-40-200L/8,5-2;65-40-200L/13-2;65-40-250/13-2
65-50-125/3-2;65-50-125/4,6-2;65-50-160/4,6-2
65-50-160/6,5-2;80-65-125/3-2;80-65-125/4,6-2

65-40-250/16-2;65-40-250L/18,5-2;65-40-250L/22-2
65-40-250L/30-2;65-50-200L/18,5-2;65-50-200L/22-2
65-50-250L/30-2;80-65-160/16-2;80-65-200L/22-2
80-65-200L/30-2;80-65-200L/37-2;100-80-160/16-2

100-80-200L/22-2;100-80-200L/30-2;100-80-200L/37-2

Page 29 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

MENBLOC

MENBLOC

6.6 Disassembly

Refer to section 1.6, Safety, and section 6

Maintenance, 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.

REPAIR OF THE PUMP

If the pump presents abnormalities or a

persistent malfunction, contact immediately:

FLOWSERVE

After-sales Service
Tel.: [phone]

(33) 2 43 40 57 57

Fax.: [phone]

be carried out by FLOWSERVE personnel or its
approved repairers whose list may be sent on
request. It is obvious that the following instructions
and recommendations cannot replace their
knowledge and experience.

a) NEVER DO MAINTENANCE

WORK WHILST THE UNIT IS CONNECTED
TO POWER.

b) DRAIN PUMP AND ISOLATE PIPING

BEFORE DISMANTLING THE PUMP.

The pump should be disassembled only if certain
signs of anomalies or malfunction are observed.
Disassemble only to the extent that the cause of
the problem may be reached.

In any case, the disassembly must be carried out
by qualified personnel who have read the
instructions of the leaflet and in particular the
safety instructions.

Disassembly must be done with great care to
avoid damage to the pumps internal parts. To
make reassembly easier, display parts in the
disassembly order. Protect all machined surfaces
from metal/metal contacts and from corrosion.

Before any disassembly it is imperative to:
a) Close the outlet and inlet valve.

b) Wait until the pump casing is at ambient

temperature.

c) Be sure that the pump casing is not under

pressure.

(33) 2 43 40 58 17

Assembly and disassembly must

6.6.1 Dismantling of the MENBLOC unit pump
end

DISMANTLING OPERATIONS

Unscrew the [6577-01] hexagon
bolts and remove the motor and
rotor unit from the pump casing
Unscrew the [2912] self-locking
nut, remove the [2905] plain
washer, the [2250] impeller, the
[6700] key and the [4200]
mechanical seal
If necessary unscrew the [6577­02] hexagon bolts to withdraw
the cover for motor casing
If necessary unscrew the [6577­02] hexagon bolts to withdraw
the casing cover of the lantern
bracket
Remove the [6570] screw and
withdraw the pump shaft

Unscrew the [6570] screw by
introducing the key into one of
the oblong holes of the lantern
Unscrew the [6577-03] hexagon
bolts and remove the motor

TO REMOVE DIRECTLY THE MOTOR FROM

THE PUMP UNIT

ADDED

WITH

PUMP

SHAFT

X X

X X

X

X

X

X

X

WITH

EXTENDED

MOTOR

SHAFT

For the MENBLOC unit with an extended
motor shaft, it is possible to directly withdraw the
motor without dismantling the impeller and the
mechanical seal.

The drawings represented in chapter 8 of this
notice locate the mentioned components by their
part number [ ].

It is possible to disassemble the motor and rotor
unit from the pump casing without disconnecting
the casing from the piping.
To achieve this unscrew the bolts part number
[6577-01].

The MENBLOC pump unit with an added pump
shaft is fitted with an IP 55 motor.

The MENBLOC pump unit with an extended motor
shaft is fitted with an IP 55 motor.

Page 30 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

MENBLOC

MENBLOC

MENBLOC

6.7 Assembly

6.7.1 Reassembly of the MENBLOC unit

MENBLOC

REASSEMBLY OPERATIONS

Fit the [2110] pump shaft on
the motor shaft end with its
[6700-01] key

Screw and tighten the [6570]
screw in the hole of the motor
shaft end

Put the motor vertically shaft
end upwards. Take
precautions not to damage the
fan cover

Put the [9331] shield grid into
the cover for motor casing

Mount the lantern bracket
[3180] on the motor. Screw
and tighten the [6577-03] bolts
and the [6581] hexagon nuts

Mount the [1221] casing cover
with stuffing box on the [3130]
cover of motor casing and
respect the orientation (the 2
casing cover ribs facing the 2
oblong holes of the cover for
motor casing)

Mount the [1221] casing cover
on the [3180] lantern bracket
and respect the orientation

For an unclamped casing
cover: screw and tighten the
[6577-02] bolts with an
appropriate wrench tightening
opposing bolts and working
around the casing

Put the fixed ring of the [4200]
mechanical seal into soapy
water and mount it in the
casing cover with the tools
defined in § 6.5

Plunge rotating ring into soapy
water

Mount the complete stationary
ring, the spring and the seat of
the [4200] mechanical seal by
using the tools defined in § 6.5

Mount the [6700] or [6700-02]
key

Mount the [2250] impeller on
the shaft end and avoid
damaging the mechanical seal
seat

Mount the [2905] plain washer.
Screw and tighten the [2912]
shaft end nut with an
appropriate key (fix the rotor in
position)

WITH AN

ADDED

PUMP SHAFT

X

X

X X

X

X

X

X

X X

X X

X X

X X

X X

X X

X X

EXTENDED

WITH AN

MOTOR

SHAFT

REASSEMBLY OPERATIONS

Mount the [4590-03] special ring
on the casing cover. Mount the
pump shaft and respect the
orientation

Screw the [6577-01] or [02] bolts.
Tighten opposing bolts working
around the cover with an
appropriate wrench (do not use a
striking-face wrench)

80-65-125, 80-65-160, 80-65-200L,
100-80-160, 100-125-250L, the
[6577-01] bolts have to be
mounted with sealing product
LOCTITE pipe sealant 577 or
similar.

Check the correct rotation of the
rotor with an appropriate key at the
shaft end

Reinstall the unit according to the
rules defined in this manual

The [6570] screw stays in the shaft
threading but does not hinder the
assembly, install the motor, mount
and block the [6577-03] bolts and
the [6581] nuts

Push on the pump shaft end
without shocks or blows until the
pump shaft presses against the
shoulders of the motor shaft.
Tighten the [6570] screw. (see the
following fig. 1)

To avoid loosening of the screw
during the running of the pump use
a nut locking compound, after
having pain carefully degreased
the screw and the threading

For MENBLOC

TO REINSTALL DIRECLY THE ELECTRIC MOTOR

WITH AN

ADDED

PUMP

SHAFT

X X

X X

X X

X X

X

X

X

WITH

EXTENDED

MOTOR

SHAFT

These recommendations correspond to a
complete assembly and to a complete dismantling.
For a partial dismantling, only certain areas will be
relevant.

The torques to be applied are:

Casing / casing Cover /
Lantern [6577] Self-locking [2912]

m.daN (lbf.ft)

M10 3 (22) M10 3 (22)
M12 5 (37) M12 6 (44)
M16 11 (81) M14 8 (59)

M18 12 (89)
M20 14 (103)

m.daN (lbf.ft)

The tightening torques have been calculated as a
function of the forces produced by the pumps.
These torques correspond to a tension of the shaft
end of 25 % to 50 % of the elastic limit.
The tolerance allowed on the tightening torques is
± 30 %.

Page 31 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

Push

Screw and lock with locking compound

Fig. 1 Direct installation of electric motor on

MENBLOC with an added pump shaft

6.7.2 Mechanical seal assembly

The mechanical seal assembly does not need any
particular adjustment. The correct setting is
ensured by a clear support of the mechanical seal
seat on the impeller hub. The stationary seal ring
is set with the help of the tube and the rotating
seal ring, is set with the help of the assembly cone
and the tube.

Page 32 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

 

 

 



 



   



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  

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











 

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   

   





   

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



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

7 FAULTS; CAUSES AND REMEDIES

Insufficient flow rate
Irregular pump running
Driver overloaded
Mechanical seal leakage
Equipment vibration
Excessive pump casing temperature
Insufficient pressure
Pump looses prime after starting

POSSIBLE CAUSES SOLUTIONS

Pump or suction pipe not completely filled - Check and complete filling
Air bubbles in pipes - Check and de-aerate the pipes
Suction level too low

Wrong rotation - Reverse 2 phases in motor terminal boxes
The motor is running on 2 phases only - Check the motor electrical power supply
Motor running too slow

Total system head higher than pump
differential head

Total system head system lower than pump
differential head

Obstructed or choked pipes or fittings
(valves filter...)

Insufficient flow rate

Worn wear-ring surfaces - Replace worn parts: CONSULT FLOWSERVE
Seizure, jamming

Excessive pipe strain on flanges

Defective mechanical seal

Defective motor bearings - CONSULT FLOWSERVE
Specific gravity or viscosity of liquid too high - Check pump selection

Mechanical defects - CONSULT FLOWSERVE
Air leak in the suction pipe - Check suction pipe is airtight
Restriction in suction pipe - Check diameter of suction pipe
Obstruction of suction pipe - Check condition of pipe
Defective gasket - CONSULT FLOWSERVE

- Check: the NPSHA > NPSHR

- Reduce suction lift

- Reduce head losses in pipes and in fittings
(diameter increase and appropriate fitting positions)

- Check valves and strainers

- Check the immersion head of the suction pipe

- Check the connection in the terminal box according to
the supply voltage

- Check the discharge head

- Check the head losses in discharge pipes (partly closed
valve, foreign particles, back pressure too high)

- Modify the installation or change the pump set

-Throttle at discharge valve or trim the impeller:
CONSULT FLOWSERVE

- Check, dismantle and clean if necessary

- Check the suction and discharge pipes (valves, back
pressure)

- Dismantle, check and repair pipe strain: CONSULT
FLOWSERVE

- Check the flange connections and eliminate strains
(pipe positioning or flexible pipe connection)

- Check and replace all the mechanical seal parts (never
run dry)

- Consult our local agent to analyze the problem

Page 33 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

9331

(motor 16kW)

(motor 16kW)

m

otor 16kW)

8 PARTS LIST AND DRAWINGS

8.1 Sectional drawings

8.1.1 Sectional drawing - MENBLOC with an extended motor shaft

Page 34 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

8.1.2 Sectional drawing - MENBLOC with an added pump shaft

Page 35 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

8.2 Sectional drawings part list

8.2.1 MENBLOC with an extended motor shaft

ITEM PARTS LIST

1110 Pump casing

1221 Casing cover

2250 Impeller

2540 Thrower

2905-01 Plain washer

2905-02 Curved spring washer

2912 Self-locking nut

3011-01 Radial ball bearing ( Drive end)

3011-02

3130 Motor end shield

4200 ∗ Mechanical seal ∗

Radial ball bearing ( Non-drive
end)

8.2.2 MENBLOC with added pump shaft

ITEM PARTS LIST

1110 Pump casing

1221 Casing cover

2110 Pump shaft

2250 Impeller

2905 Plain washer

2912 Self-locking nut

3180 Lantern bracket

4200 ∗ Mechanical seal ∗

4590-01 *

4590-02 ∗ Gasket ∗

4590-03 ∗ Casing joint ∗

Gasket ∗

4212 Spacer

4590-01 ∗ Gasket ∗

4590-02 ∗ Gasket ∗

4590-03 ∗ Casing joint ∗

6511 Priming plug

6515 Drain plug

6577-01 Hexagon bolt

6577-02 Hexagon bolt

6700 Key

8010 Motor

8125 Rotor

8140 Wound stator

8161 Fan

8162 Fan cover

8170 Terminal box

9331 Cover plate

6511 Priming plug

6515 Drain plug

6570 Screw with dog point

6577-01 Hexagon bolt

6577-02 Hexagon bolt

6577-03 Hexagon bolt

6581 Hexagon nut

6700-01 Key (motor)

6700-02 Key

8010 Motor

8.3 General arrangement drawing

The typical general arrangement drawing and any
specific drawings required by the contract will be sent
to the Purchaser separately unless the contract
specifically calls for these to be included into the
User Instructions. If required, copies of other
drawings sent separately to the Purchaser should
be obtained from the Purchaser and retained with
these User Instructions.

Page 36 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

9 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.

10 OTHER RELEVANT
DOCUMENTATION AND MANUALS

10.1 Supplementary User Instructions

Supplementary instructions such as for a driver,
instrumentation, controller, seals, sealant system
etc are provided as separate documents in their
original format. If further copies of these are
required they should be obtained from the supplier
for retention with these User Instructions.

10.2 Change notes

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

10.3 Additional sources of information

Reference 1:

NPSH for Rotor dynamic Pumps: a reference
guide, Euro pump Guide No. 1, Euro pump &
World Pumps, Elsevier Science, United Kingdom,

1999.

Reference 2:

Pumping Manual, 9th edition, T.C. Dickenson,
Elsevier Advanced Technology, United Kingdom,

1995.

Reference 3:

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

Reference 4:

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

Reference 5:

ANSI B31.3 - Process Piping.

Page 37 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

Nota :

Page 38 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

Nota :

Page 39 of 40 flowserve.com

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13

Your Flowserve factory contacts:

Flowserve Pompes SAS
13, rue Maurice Trintignant
CS 10001
72234 Arnage Cedex, France

Telephone (24 hours): [phone]
Sales & Admin: [phone]
Repair & Service Fax: [phone]

Local Flowserve factory representatives:

North America:
Flowserve Pump Division
5310 Taneytown Pike, PO Box 91
Taneytown, MD 21787-0091, USA

Telephone: [phone]
Customer Service FAX: [phone]
Parts inquiry/Order PH: [phone]

South America:
Flowserve do Brasil Ltda
Av. Don Helder Camara, 5451
20771-001 Rio de Janerio, Brasil

Telephone: [phone]
Fax: [phone]

To find your local Flowserve representative please
use the Sales Support Locator System found at
www.flowserve.com

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

Flowserve FSG -Italy
Worthing S.P.A.
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
10 Tuas Loop
Singapore 637345
Telephone [phone]
Fax [phone]