Flowserve APKD User Manual

USER INSTRUCTIONS

APKD

Double-Case, Double Suction Vertical Pump

PCN=26999903 07-13 (E) "Original Instructions"

Installation

Operation

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

1 INTRODUCTION AND SAFETY ....................... 3

1.1 General ......................................................... 3

1.2 CE marking and approvals ........................... 3

1.3 Disclaimer ..................................................... 3

1.4 Copyright ...................................................... 3

1.5 Duty conditions ............................................. 3

1.6 Safety ............................................................ 4

1.7 Safety labels summary ................................. 7

1.8 Noise level .................................................... 7

1.9 Specific machine performance ..................... 8

2 TRANSPORT AND STORAGE ........................ 8

2.1 Consignment recipt and unpacking .............. 8

2.2 Handling........................................................ 9

2.3 Lifting ............................................................ 9

2.4 Storage ....................................................... 12

2.5 Recycling and end or product life ............... 12

3 DESCRIPTION ............................................... 12

3.1 Configuration .............................................. 12

3.2 Nomenclature ............................................. 13

3.3 Design of major parts ................................. 15

3.4 Performance and operation limits ............... 16

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

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

4.2 Part Assemblies .......................................... 22

4.3 Foundation .................................................. 22

4.4 Grouting ...................................................... 24

4.5 Initial Alignment .......................................... 24

4.6 Piping .......................................................... 25

4.7 Electrical Connections ................................ 27

4.8 Final shaft alignment check ........................ 27

4.9 Protection systems ..................................... 27

5 COMMISSIONING, START-UP, OPERATION

AND SHUTDOWN ................................................... 28

5.1 Pre-commissioning procedure .................... 28

5.2 Pump lubricants .......................................... 28

5.3 Impeller adjustment .................................... 28

5.4 Direction of rotation .................................... 30

5.5 Guarding ..................................................... 30

5.6 Priming and auxiliary supplies .................... 31

5.7 Starting the pump ....................................... 31

5.8 Operating the pump .................................... 33

5.9 Stopping and shutdown .............................. 34

5.10 Hydraulic mecanical and electrical duty . 34

6 MAINTENANCE .............................................. 35

6.1 General ....................................................... 35

6.2 Maintenance schedule ................................ 36

6.3 Spare parts ................................................. 37

6.4 Recommended spares and consumables .. 38

6.5 Tools required ............................................. 38

6.6 Fastener torques ........................................ 39

6.7 Setting impeller clearance .......................... 39

6.8 Disassembly ............................................... 39

6.9 Examination of parts ................................... 40

6.10 Assembly ................................................ 43

7 FAULTS, CAUSES AND REMEDIES ............. 44

8 DRAWINGS AND PARTS LISTS ................... 46

8.1 Cross section: Product lubricated APKD .... 46

8.2 Cross section: Suction barrel APKD ........... 49

8.3 General arrangement drawing .................... 52

9 CERTIFICATION ............................................. 52

10 OTHER RELEVANT DOCUMENTATION AND

MANUALS ................................................................ 52

10.1 Supplementary user instructions ............ 52

10.2 Change notes ......................................... 52

10.3 Additional sources of information ........... 52

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

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 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 certai n regions of t he world sha ll
conform with the applicable CE Marking Directive s
covering Machinery and, where ap plicable, L ow Voltag e
Equipment, Electromagnetic Compatibility (EMC),
Pressure Equipment Directive (PED) and Equipment for
Potentially Explosive Atmospheres (ATEX).

Where applicable the Directives and any additional
Approvals cover important safety aspects relating to

machinery and equipment and the satisfactory provision
of technical documents and safety instructions. Where
applicable this document incorporates information
relevant to these Directives and App rovals.
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 complete and reliable. However, in spite of
all of the efforts of Flowserve Corporation to
provide comprehensive instructions, good
engineering and safety practice should always be
used.

Flowserve manufactures products to exacting
International Quality Management System Standards
as certified and audited by external Qual ity 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 fr om other vendo rs 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 Flow serve parts an d
accessories is considered to be misuse. Damage or
failure caused by misuse is not cov ered 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,

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

temperature or duty) it is requested that the user
seeks the written agreement of Flowserve before
start up.

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:

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

This symbol indicates “hazardous and toxic fluid”
safety instructions where non-compliance would affect
personal safety and could result in loss of life.

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

This symbol indicates 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.

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

This sign is not a safety symbol but indicates

an important instructi on in t he assem bly proce ss.

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.

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.

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.

APPLYING HEAT TO REMOVE IMPELLER
There may be occasions when the impeller has either
been shrunk fit on to the pump shaft or has become
difficult to remove due to products of corrosion.

If you elect to use heat to remove the impeller , it must
be applied quickly to the impeller boss. TAKE
GREAT CARE!

Before applying heat ensure any residual hazardous
liquid trapped between the impeller and pump shaft is
thoroughly drained out through the impeller keyway
to prevent an explosion or emission of toxic vapour.
This must be carried out with the shaft in the vertical
position. On some pump sizes a cavity exists in the
impeller bore so on occasions a significant volume of
liquid may drain out.

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.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

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 80 ºC (175 ºF) or
below -5 ºC (20 ºF) in a restricted zone, or exceeds
local regulations, action as above shall be taken.

HAZARDOUS LIQUIDS
When the pump is handling hazardous liquids care
must be taken to avoi d exposure t o the liq uid by
appropriate siting 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 PARTLY 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. The pump outlet control valve 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

DO NOT RUN THE PUMP AT
ABNORMALLY HIGH OR LOW FLOW RATES
Operating at a flow rate higher than norma l or at a flo w
rate with no back pressure on the pump may overload
the motor and cause cavitation. Low flow rates may
cause a reduction in pump/beari ng life, ov erheatin g of
the pump, instability and cavitation/vibrat ion.

1.6.1 Products used in potentially explosive

atmospheres

Measures are required to:

 Avoid excess temperature
 Prevent build up of explosive mixtures
 Prevent the generation of sparks
 Prevent leakages
 Maintain the pump to avoid hazard

The following instru ctions fo r pumps a nd pum p units
when installed in potentially explosive atmospheres
must be followed to help ensure explosion protecti on.
For ATEX, both electrical and non-electrical equipment
must meet the requirements of E uropean Directiv e
94/9/EC. Always observe the reg ional le gal Ex
requirements eg Ex elect rical item s out side the E U may
be required certified to other than ATEX eg IECEx, UL.

1.6.1.1 Scope of compliance

Use equipment only in the zone for whic h it is
appropriate. Always check that the driver, drive
coupling assembly, seal and pump equipment are
suitably rated and/or certifie d for the classi fication of the
specific atmosphere in which they are to be inst alled.

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

The output from a variable frequency drive (VFD) can
cause additional heating affects in the motor and so, for
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.

INLET VA LVES TO BE FULLY OPE N
WHEN PUMP IS RUNNING
Running the pump at zero flow or below the
recommended minimum flow continuously will cause
damage to the pump and mechanical seal.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

1.6.1.2 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 EN13463-5)

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.)

1.6.1.3 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 ºC (104 ºF); 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.

Temperature class

to EN13463-1

T6
T5
T4
T3
T2
T1

* The table only takes the ATEX tem perature class int o consideration.

Pump design or material, as well as component design or m aterial,
may further limit the maximum working temperature of the liquid .

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)

Temperature limit of

liquid handled *

Consult Flowserve
Consult Flowserve

115 °C (239 °F)
180 °C (356 °F)
275 °C (527 °F)
400 °C (752 °F)

The temperature rise at the seals and bearings and
due to the minimum permitted flow rate is taken into
account in the temperatures stated.

The responsibility for compliance with the
specified maximum liquid temperature is with the
plant operator.

Temperature classification “Tx” is used when the
liquid temperature varies and the pump could be
installed in different hazarous 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.

Where there is any risk of the pump being run
against a closed valve generating high liquid and
casing external surface temperatures, fit an external
surface temperature protection device.

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

In dirty or dusty environments, make regular checks
and remove dirt from areas around close clearances,
bearing housings and motors.

1.6.1.4 Preventing the build up of explosive
mixtures

ENSURE THE PUMP IS PROPERLY FILLED
AND VENTED AND DOES NOT RUN DRY
Ensure the pump and relevant suction and discharge
pipeline system is totally filled with liquid at all times
during the pump operation, so that an explosive
atmosphere is prevented. In addition it is essential to
make sure that seal chambers, auxiliary shaft seal
systems and any heating and cooling systems are
properly filled.

If the operation of the system cannot avoid this
condition fit an appropriate dry run protection device
(for example liquid detection or a power monitor).

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

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

1.6.1.5 Preventing sparks

To prevent a potential hazard from mechanical

contact, the coupling guard must be non-sparking.
To avoid the potential hazard from random induced

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

Avoid electrostatic charge: do not rub n on-metalli c

surfaces with a dry cloth; ensure cloth is damp.
For ATEX application sthe coupling must be selected

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

Additional requirement for metallic pumps on
non-metallic baseplates

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

1.6.1.6 Preventing leakage

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

Avoid entrapment of liquid in the pump a nd associat ed
piping due to closing of suct ion an d discharg e valves,
which could cause dangerous excessiv e pressures to
occur if there is heat input t o the liqu id. This ca n 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, install a liquid detection device.

1.6.1.7 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. 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 Safety labels summary

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

Oil lubricated units only:

1.8 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.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

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 a ssumed in t he “pump and
motor” noise is that typically expected f rom sta ndard
and high efficiency motors when on load dire ctly 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 Flowserv e 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 L

at 1 m

pA

(3.3 ft) from the machine, for “free field conditions
over a reflecting plane”.

For estimating sound power level L

(re 1pW) then

WA

add 17 dBA to the sound pressure value.

1.8.1 Typical vertical motor noise data

Motor

Frame

Size.

NEMA

180

210

250

280

320

360

400

440 3600 80.0 90.0

RPM Sound

Pressure

(dBA )
(WP- I

enclosure)

3600 70.0 78.0
1800 60.0 68.0

1200 & slower 55.0 63.0

3600 70.0 78.2
1800 60.0 68.2

1200 & slower 55.0 63.2

3600 75.0 83.4
1800 70.0 78.4

1200 & slower 60.0 68.4

3600 75.0 83.8
1800 70.0 78.8

1200 & slower 60.0 68.8

3600 75.0 84.0
1800 65.0 74.0

1200 & slower 65.0 74.0

3600 75.0 84.2
1800 65.0 74.2

1200 & slower 65.0 74.2

3600 80.0 89.5
1800 70.0 79.5

1200 & slower 65.0 74.5

Sound
Power
(dBA )

(WP- I

enclosure

1800 70.0 80.0

1200 & slower 70.0 80.0

449

5000

5800

6800

8000

1800 85.0 97.8

1200 & slower 80.0 92.8

3600 90.0 102.8
1800 85.0 97.8

1200 & slower 80.0 92.8

3600 90.0 103.7
1800 90.0 103.7

1200 & slower 80.0 93.7

1800 90.0 103.9

1200 & slower 85.0 98.8

1800 90.0 104.7

1200 & slower 85.0 99.7

The noise levels shown in table 1.8.1 are
extracted from typical motor manufacturer’s
data/catalogue to provide the average expected
motor noise values at no load for reference only and
are not guaranteed. The values could vary
depending upon the test and surrounding conditions.
The combined noise level of the pump and the motor
could exceed the values shown. It is to be noted that
adding motors with similar noise levels increases the
total noise level. Therefore, the dB correction to the
values listed above is required to obtain the
combined noise levels of motor and the pump.
Actual on-site noise measurement by experts is
recommended and safety measures are to be taken
accordingly.

1.9 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.

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 crates, boxes and wrappings for any
accessories or spare parts which may be packed

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

separately with the equipment or attached to side
walls of the box or equipment.

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

2.2 Handling

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

2.3 Lifting

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

To avoid distortion, the pump unit should be
lifted by using lifting equipment certified to local
standards.

The pumps are generally very heavy therefore,
size/shape factors will have to be considered before
attempting to lift them. It is strongly recommended to
attempt lifting from a safe distance to prevent any
injury or loss of life. Consulting with experts is
recommended.

Pump heads may be shipped with the seal
housing installed. For ease of assembly and to
prevent damage, we recommend removing the
housing before putting the head on the pump.

Flowserve will not supply eyebolts neither
fixed nor separately with the pump. It is the
responsibility of the installer to arrange appropriate
hardware that can handle the weights and results in
safe and successful installation.

Before lifting the driver alone, refer to the
manufacturer’s instructions.

2.3.1 Lifting of fabricated discharge heads with

or without the pump

If the pump is supplied with a fabricated discharge
head use 2 point or 3 point method of lifting as shown
in the details provided in 2.3.1.1 & 2.3.1.2. This
method is applicable to the lifting of discharge heads
with or without the pump.

2.3.1.1 Two point lifting of fabricated discharge
head types TF, UF & HFH (with or
without pump attached)

Figure 2.1

"L"

FABRICATED WITH
2 POINT LIFTING

50 mm (2in.) HOLE

Fabricated heads with discharge size mm (in.)

100

Pin
Dia.

1070

L

(42)

“L” is approximate length

(4)
25
(1)

150

(6)
32

(1.25)

1220

(48)

200

(8)
32

(1.25)

1220

(48)

250
(10)

32

(1.25)

1370

(54)

300
(12)

38
(1.5)
1370

(54)

2.3.1.2 Three point lifting of fabricated
discharge head of type HFL (with or
without pump attached)

Figure 2.2

HFL STYLE FABRICATED
WITH 3 POINT LIFTING

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

2.3.2 Lifting of bowl assembly only

Clamp the bowl assembly and center the lifting hook
for lifting and lowering the assembly into the
sump/suction barrel.

a) Lower the bowl assembly until the clamp

extensions rest on the foundation (use
appropriate supports).

b) Build the very first section of the column piping,

and lower the entire assembly to assemble the
next column section.

c) Continue to build until it is ready for discharge

head assembly.
d) Install the discharge head.
e) Assemble the motor.

Example: Lifting of bowl assembly

Figure 2.3

2.3.3 Lifting of suction barrel

Suction barrel (also referred as ‘Can’) is always
supplied separately and has to be installed into the
sump first. Install eyebolts on the flange of the
suction barrel and attach slings and straps to bring
the suction barrel to a vertical position. Move the
barrel for installation. Provide hand support to
prevent the suction barrel from swaying during
movement.

Example: Lifting of suction barrel

Figure 2.4

SUCTION BARREL (CAN)

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

2.3.4 Lifting of fully assembled pumps

If the pump is fully assembled, it has to be adequately strapped and supported at least two places before it can
be lifted from the shipping crate and moved to the installation site. See details shown. Same rules are
applicable when the pump is pulled out from the sump and moved to another location.

Figure 2.5

Examples shown here are for illustration only. See section 2.3 1 for specific lifting instructions
based on design variations. The pumps vary in weight, length and physical appearances from the types shown
here. Therefore, before lifting is attempted, exercise caution to prevent any injuries or loss of life.

Figure 2.6

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

2.4 Storage

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 the pump at frequent intervals to
prevent brinelling of the bearings and the seal faces,
if fitted, from sticking.

2.4.1 Inspection before storage

a) Inspect the preservative coating/painted surfaces

on the various parts. Touch up the areas, If
necessary.

b) Inspect all covers over pump openings and piping

connections. If found damaged, remove the
covers and inspect interiors of the opening for any
deposits of foreign materials or water.

c) If necessary, clean and preserve the interior parts

as noted above to restore the parts to the "as
shipped" condition. Replace covers and fasten
securely.

2.4.2 Short term storage (up to 6 months)

Follow the steps given in sect ion 2.4. 1. Select a
storage space so that the unit will not be subjected to
excess moisture, extreme weather conditions,
corrosive fumes, or other harmful conditions.

Driver storage instructions: Check driver
manufacturer’s User Instructions

2.4.3 Long term or extended storage

If a situation arises for a long-term storage, ( more
than 6 months) please contact Flowserve for special
storage instructions and warranty related information.

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.

3 DESCRIPTION

Should questions arise concerning the pump,
Flowserve pump division will require the complete
serial number to be of assistance. The serial number
is stamped on a metal nameplate affixed to the
discharge head assembly. The driver will have a
separate nameplate attached to it. If you are
requesting information on the driver, please provide
both the driver serial number and the pump serial
number for Flowserve representative.

3.1 Configuration

APKD’s, are engineered pumps as:(a) Wet pit type
and (b) suction barrel (can) type pumps. The pumps
vary in size, impeller types and length, and type of
discharge head used

3.1.1 Sump and deep well VTP
Figure 3.1

Make sure that hazardous substances or
toxic fluids 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.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

3.1.2 Suction barrel (Can) VTP
Figure 3.2

3.2 Nomenclature

The pump size/ serial number will be engraved on
the nameplate typically. The nameplate is attached
to the discharge head assembly. Identify the actual
pump size and serial number from the pump
nameplate. The driver will have a separate
nameplate attached to it.

3.2.1 Discharge head nomenclature

Consists of alphanumeric code as follows.
Examples: 10HF20, 6TF16,…….

10 LF 30

Nominal driver base diameter in inches

Discharge head type (see details below)

Nominal discharge diameter in inches

HF = Fabricated head for above the ground discharge
TF & LF = Fabricated heads with base flange
HFL = Fabricated head for above ground discharge - Low H.P
HFH = Fabricated head for above the ground discharge -High H.P.

Please see section 3.2.1.1 for discharge head types
and identification.

3.1.3 Most common VTP models

The VTP configurations shown in sec 3.1.1 and 3.1.2
are typical.

Some units will not require a column
assembly. In such cases, the bowl assembly is
connected directly to the discharge head. Vertical
turbine pumps can have single or multiple stages.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

3.2.1.1 Types of discharge heads

Typical discharge head types. Details (a) thru (e).
a) HF type fabricated discharge head

(Typically with square base plate)

Figure 3.3

b) TF type fabricated discharge head

Figure 3.4

d) HFL type fabricated discharge head

Figure 3.6

e) HFH type fabricated discharge head

Figure 3.7

c) LF type fabricated discharge head

(Typically with a circular base plate- ANSI type.
Also available with suction barrel mounting)

Figure 3.5

The discharge heads shown in section

3.2.1.1 (a) thru (e) are for illustration only. The shaft
and coupling arrangements vary. For the actual
configuration of the pump that has been purchased,
please refer to the drawings supplied with the pump
or order specific sectionals from Flowserve.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

3.3 Design of major parts

3.3.1 Drivers

Solid shaft drivers: where the rotor shaft is solid and
projects below the driver-mounting base. This type
driver requires an adjustable coupling for connecting to
the pump.

3.3.2 Discharge Head Assembly

(See also section 3.2.2.1)
The discharge head supports the driver and bowl
assembly as well as supplying a discharge connection
in most cases.

A shaft sealing arrangement is located in the
discharge head to seal the shaft at its exit from the
liquid chamber.

The shaft seal will usually be either a mechanical
seal assembly or stuffing box with an open lineshaft
or a tube-packing box with an enclosed lineshaft.

3.3.3 Column assembly

The column assembly consists of column pipe, which
connects the bowl assembly to the discharge head
and carries the pumped fluid to the discharge head.
Houses and supports the shaft and may contain
bearings. T ypical column assembly shown below:

a) flanged column assembly

Figure 3.8

3.3.4 Bowl assemblies

The bowl assembly consists of impellers rigidly
mounted on the pump shaft coupled to an electric
motor. Impellers are cast wheels with multiple diffuser
vanes and are generally coated to meet the hydraulic
requirements. See section 8.0 for cross sectional and
part details.

3.3.5 Suction strainers

Ina new installation, great care should be taken to
prevent dirt, scale and welding beads from entering
the pump, as it is particularly important to protect the
numerous close running fits form abrasive matter
present in new piping.

The suction system should be thoroughly flushed
before installation the suction and making up suction
piping to the pump

The suction strainer should be installed 4 pipe
diameters away from suction.

Cone Type Strainer

Figure 3.9

The column supports shaft assemblies, that are of an
open lineshaft construction utilizing the fluid being
pumped to lubricate the lineshaft bearings. The shafts
are key coupled with clamp ring design.

See sectional drawings supplied with the pump for
exact column assembly details as per the order. The
size and configuration vary depending upon the
specific order requirements and application criteria.

3.3.6 Impellers

The double suction first stage impeller (3A) is keyed
and held in position on pump end shaft (10A) by shaft
nut. The shaft nut is secured to the shaft with set
screws. The remaining single suction intermediate
impellers are also keyed. Each impeller is held in
position on the upper shaft by use of a split lock
collar secured with cap screws. All impellers are of
the enclosed type, one piece constructions, and are
dynamically balanced.

3.3.7 Stuffing box

Some APKD’s are fitted with stuffing boxes. In such
cases, stuffing boxes are normally adequate for
working pressures up to 20.7 bar (300 psi). Refer to
stuffing box User Instructions for specifications.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

3.3.7.1 High pressure stuffing box

This type of packing box is fitted on to an open lineshaft for pressures up to 20 bar (300 psi) uses six rings of
packing with one seal cage and allows grease lubrication.

Figure 3.10

3.3.8 Mechanical shaft seal

APKD’s can also be fitted with a mechanical seal.
The requirement to fit the mechanical seal to be
provided at the time of contract.

3.3.9 Accessories

Accessories may be fitted when specified by the
customer.

3.4 Performance and operation limits

This product has been selected to meet the
specifications of the purchase order. See section 1.5.

The following data is included as additional
information to help with the installation. It is typical
and factors such as temperature, materials and seal
type may influence this data. If required, a definitive
statement for your particular application can be
obtained from Flowserve.Operating limits

Pumped liquid temperature
limits*

Maximum ambient
temperature*

Maximum pump speed refer to the nameplate

5 ºC (40 ºF) to +80 ºC (176 ºF)

Up to +40 ºC (104 ºF)

*Subject to written agreement from Flowserve.
Special designs and materials may be available for
pumps operating above and below these specified
limits. Contact Flowserve for upgrade options
available for your specific application.

Page 16 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

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.

Inspection prior to installation

Six months prior to the scheduled installation date, a
Flowserve Pump Division representative is to be
employed to conduct an inspection of the equipment
and the facility. If any deterioration of equipment is
noticed, the Flowserve Pump Division representative
may require a partial or complete dismantling of the
equipment including restoration and replacement of
some components.

4.1 Location

The pump should be located to allow room for acce ss,
ventilation, maintenance and insp ection with ampl e
headroom for lifting and should be as close as
practicable to the supply of liquid to be pumped.

Refer to the general arrangement drawing for the pump
set.

4.1.1 General installation check-list

The following checks should be made before starting
actual installation.

a) Make sure that motor nameplate ratings and the

power supply system match correctly.

b) Check the sump depth and pump length match-

up.
c) Check the liquid level in the sump.
d) Check the installation equipment to be sure that it

will safely handle the pump weight and size.
e) Check all pump connections (bolts, nuts etc) for

any shipping and handling related problems.

Always support shafting in at least
three places when lifting or installing. No installation
should be attempted without adequate equipment
necessary for a successful installation.

shaft connection. Excess lubricant should be
avoided.

4.1.2 Installation of pumps that are shipped
unassembled

4.1.2.1 Lifting

See lifting methods in section 2.3.

4.1.2.2 Equipment and tools required for

installation of unassembled pumps

The following list covers the principal tools/items
required for installation.

a) Mobile crane capable of hoisting and lowering the

pump and/or motor.
b) Two (2) steel clamps of suitable size.
c) Two (2) sets of chain tongs & cable sling for

attaching to the pump and motor lifting eyes.
d) Pipe clamp for lifting bowl assembly and the

column pipe. Approximately 4.57 m (15 ft) of 19

mm (3/4 in.) diameter rope may be required.
e) General purpose hand tools, pipe wrenches, end

wrenches, socket set, screwdrivers, Allen

wrenches, wire brush, scraper and fine emery

cloth.
f) Thread sealing compound designed for stainless

steel and light machinery oil.

Parts and accessories may be placed
inside shipping containers or attached to skids in
individual packages. Inspect all containers, crates
and skids for attached parts before discarding.

4.1.2.3 Uncrating and cleaning of unassembled

pump

a) Clean the parts of any dirt, packing material and

other foreign matter.

b) Flush the pump inside and outside with clean

water. Clean all machined surfaces.

c) Remove any rust spots found on the machined

surfaces with fine emery cloth.

d) Clean all threaded connections and any accessory

equipment.

Be sure to check the motor shaft size against the
coupling bore size

Apply thread lubricant sparingly to

male shaft threads only at the time of making up

Page 17 of 55 flowserve.com

should be left in the crate to avoid damage or loss of
straightness.

4.1.2.4 Installing the bowl and column assembly

a) Sump and piping should be thoroughly cleaned of

all loose debris before starting installation.

b) Check all bolts for tightness.

Lineshaft when shipped separately

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

c) Do not lift or handle the bowl assembly by the

pump shaft.

d) If a strainer is to be used, attach it to the bowl

assembly using clips and fasteners provided.

e) Position lifting equipment so it will center over the

foundation opening.

f) If a base plate is used, level the plate to 0.08 mm

per m (0.001 in. per ft) and then grout and anchor
in place.

g) Check for axial clearance or endplay and record

that number for future reference (while bowls are
in a horizontal position you should be able to push
or pull the pump shaft indicating axial clearance).

h) Carefully lift the suction barrel and the bowl

assembly with suitable straps or clamps (See

section 2.4 for lifting and safety rules).

i) Lower the bowl assembly into the well or sump.

Set clamp or holding device that is attached to
bowls on a flat surface. This is to stabilize bowl
assembly and reduce possibility of cross threading
the shaft.

j) Proceed to install the column assembly (refer to

specific column pipe assembly instructions
supplied with the pump).

k) Assemble the discharge head.

4.1.2.5 Installation of discharge head

Pump head may be shipped with the sealing
housing installed. For ease of assembly and to
prevent damage, we recommend removing the
housing before putting the head on the pump.

a) Lift discharge head over shaft and lower carefully

into place (See section 2.3 for recommended
lifting methods and safety instructions). Be sure
not to bend the shaft. Fasten the top column
flange and bearing retainer, if supplied to bottom
of head.

b) Use shims or wedges between the pump and

foundation to level the pump. The shaft must be
centered on the discharge head.

See section 4.1.5 for coupling installation on solid
shaft drivers and section 4.3.1~4.3.4 for pump
leveling details

4.1.3 Installation of pumps that are shipped

fully assembled

4.1.3.1 Lifting

See lifting methods in section 2.3.

4.1.3.2 Equipment and tools required for
installation of a fully assembled pump

a) Mobile crane capable of hoisting and lowering the

entire weight of the pump and motor.

b)

Cable sling for attaching to the pump and motor
lifting eyes.

c)

Ordinary hand tools: Pipe wrenches, end
wrenches, socket set, screwdrivers, Allen
wrenches, wire brush, scraper and fine emery
cloth.

d)

Thread sealing compound designed for type of
connection and light machinery oil.

The single most common cause of pump
vibration is from a bent shaft. Shafting is
straightened to stringent tolerances prior to shipping
and great care must be exercised in its handling.

Always support shafting in at least three places when
lifting or installing.

Parts and accessories may be placed
inside shipping containers, or attached to skids in
individual packages.

Inspect all containers, crates and skids for attached
parts before discarding.

Lifting heavy objects is dangerous. Use of
appropriate tools and procedures is must.

4.1.3.3 Uncrating and cleaning of a fully

assembled pump

a) Clean the parts of all dirt, packing material and

other foreign matter.

b) Flush the pump inside and outside with clean

water.

c) Clean all machined surfaces. Remove any rust

spots found on the machined surfaces with fine
emery cloth.

d) Clean all threaded connections and any

accessory equipment.

4.1.3.4 Installing the fully assembled pump

If a base plate is used, level the plate to 0.08 mm per
m (0.001 in. per ft), grout and anchor in place.

See sections 4.3.1~4.3.4 for pump leveling details.
Position lifting equipment so it will center over the

foundation opening.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Sump and piping should be
thoroughly cleaned of all loose debris before starting
installation.

Set up installation unit so that the lifting cable will be
centered directly over the well or sump. Carefully lift
the bowl assembly and suction barrel with a clamp.
Lower the bowl assembly into the well or sump. Set
the clamps or holding device that is attached to bowls
on a flat surface. This is to stabilize bowl assembly
and reduce possibility of cross threading the shaft.

a) When installing 152 mm (6 in.) or 203 mm (8 in.)

pump assembly, leave the pump securely
fastened to the wooden skid (as shipped) until the
bowl assembly is raised to a vertical position

b) Lift the pump to a vertical position. If a strainer is

used, attach it to the bowl assembly.

c) Position pump over sump or suction barrel. Align

the discharge of the pump with external piping
then lower onto the base. Level the entire pump.

d) If a mechanical seal is included, install the seal at

this point per the attached instructions.

4.1.4 Installation of pump with the suction

barrel (also referred as ‘can’)

If the pump includes a suction barrel (can), follow the
procedure as listed below. (See lifting instructions in
section 2.3)

a) Install the suction barrel first and grout the

mounting flange and bolts directly to the
foundation.

b) If soleplate is used, mount and grout the

soleplate and mount the suction barrel onto the
soleplate.

c) Level the soleplate & the suction barrel flange as

required.

d) Install the pump.

4.1.5 Installation of couplings on solid shaft

drivers.

Clean threads on pump shaft and on
adjusting nut.

Check for burrs and nicks.

All burrs, nicks and rust must be removed from all
mating parts of flanged coupling and pump before
installation. Failure to remove all burrs, nicks and
rust may result in misalignment causing pump to fail.

4.1.5.1 Installation of adjustable flanged
coupling WA.

a) The key [46A] for the driver shaft keyseat should

be a snug or tight fit in the shaft keyseat, and a
sliding fit in the keyseat of the driver half coupling
[42].

b) The key with pin [46] should be a sliding fit in

pump shaft keyseat and a snug or tight fit in pump
half coupling [44] keyseat.

c) Side clearance of keys in keyseats should be

checked with a feeler gauge. This clearance
should not exceed 0.076 mm (0.003 in.) for a
snug fit or 0.127mm (0.005 in) for a sliding fit.
These are maximum allowable clearances. Closer
fits are preferred, if possible. It may be necessary
to file-dress keys to obtain proper fit.

d) Insert the key [46] with pin into pump half of

coupling [44] putting the pin in the hole in keyseat.
The key should not extend below coupling.

e) Lubricate pump coupling half and key assembly

with light oil and slide it onto pump shaft [12A] with
flange up. Slide it past threads.

f) Lubricate adjusting nut [66A] with light oil and

thread it onto pump shaft [12A] (left hand threads)
with male register down. Thread it on until top of
shaft and top of nut are even.

g) Uncrate and lift driver to allow access to drive

shaft.

The driver must be set on supports
capable of carrying the entire weight of the driver
before proceeding to step (h). Failure of supports
could cause damage to the motor or loss of life.

h) Clean and check driver shaft. Remove any burrs.
i) Check the fit of the straight key and split thrust

rings [312A] in their respective keyseats. (Refer to
paragraph (a) regarding fit of the straight key).

j) Install straight key into keyseat. The bottom of the

key must be above the top of circular keyseat for
the split thrust rings.

k) Lubricate driver half coupling lightly and slide it

onto driver shaft. Slide bottom of coupling above
the top of the keyseat for split thrust rings.

l) Install split thrust rings into circular keyseat and

slide the coupling down over them.

m) Tighten the coupling bolts as follows.

Coupling
size

1 & 2

3, 4 & 5

Coupling bolts tightening torques

Flange diameter
mm (in.)

112 & 137
(4.4 & 5.4)

156, 188, & 213

(6.1, 7.4, & 8.4)

6

251

(9.9)

Torque Nm (In·lb)

121.5 (1075)

237.0 (2100)

424.0 (3750)

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Torque values are for standard fasteners lubricated
with a high stress lubricant (such as, graphite and oil,
moly-disulphite, white lead etc.). For stainless steel
bolts, multiply listed torques by 0.80.
n) Proceed with driver installation

Figure 4.1

MOTOR SHAFT

(42) DRIVER COUPLING

HALF

(46A) DRIVE KEY

(312A) SPLIT THRUST

RING

(66A) ADJUSTING NUT
(44) DRIVEN COUPLING

HALF

(364) CAP SCREW

4.1.5.2 Installation of adjustable flanged spacer

coupling WSA

Follow procedure from (a) thru (l) as listed in section

4.1.5.1.
m) Bolt spacer [314] to the driver half coupling [42]

using the short set of socket head cap screws
[364]. The male register should be pointing
down. Tighten all cap screws evenly to the bolt
torques as listed in 4.1.5.1 under item (m).

n) Proceed with the driver installation.

Figure 4.2

MOTOR SHAFT

(42) DRIVER COUPLING

HALF

(46A) DRIVE KEY

(46) KEY ASSEMBLY

(312A) SPLIT THRUST

RING

(314) SPACER

(12A) TOP SHAFT

(364) CAP SCREW

TYPE WA COUPLING DETAIL

(363) HEX NUT

(44) DRIVEN COUPLING

HALF

(364) CAP SCREW

(46) KEY ASSEMBLY

(12A) TOP SHAFT

TYPE- WSA COUPLING DEATILS

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

4.1.5.3 Installation of non-adjustable flanged
coupling WNA

Follow procedure from (a) thru (e) as listed in section

4.1.5.1.

f) Install one set of split thrust rings [312A] in to the

circular keyway in pump shaft. Pull up the pump
half of the coupling [44] over the split keys.

g) Slide driver half coupling [42] onto driver shaft in

the same manner as the pump half of the
coupling.

h) Set the spacer ring [314] between the two halves

of the coupling together. Tighten all cap screws
[364] evenly to the bolt torques as listed in

4.1.5.1 under item (m).

i) Proceed with the driver installation.

Figure 4.3

MOTOR SHAFT

(42) DRIVER COUPLING

HALF

(363) HEX NUT

(46A) DRIVE KEY
(312A) SPLIT THRUST

RING

(314) SPACER RING
(312A) SPLIT THRUST

RING

(44) DRIVEN COUPLING

HALF

(364) CAP SCREW
(46) KEY ASSEMBLY
(12A) TOP SHAFT

TYPE-WNA COUPLING DETAILS

4.1.6 Installation of drivers

Drivers will come with solid shaft as
specified on the order/contract.
Choose the correct installation procedure from the
following paragraphs.

Reverse rotation with the pump shaft
connected can cause extensive damage to the pump.
Always check rotation before connecting driver to
pump.

4.1.6.1 Installation of solid shaft driver

When lowering the motor and driver
half of coupling onto pump, do not let pump half of
the coupling touch the driver half of the coupling.

Before bumping motor make sure coupling halves are
not touching and that the driver can rotate freely,
without rotating the pump

Driver half coupling must be in proper position so the
circular key will not come out.

a) Clean driver mounting flange on discharge head

and check for burrs or nicks on the register and
mounting face. Oil lightly.

b) Center motor over pump and rotate to align

mounting holes. Rotate junction box into desired
position.

c) Lower driver carefully into place making certain

that the female register on the driver mates over

the male register on the pump.
d) Bolt driver to discharge head.
e) Check driver manufacturer's instructions for

special instructions including lubrication

instructions and follow all "startup" instructions.
f) Drivers should be checked for rotation at this time.

Make electrical connections "bump" motor

(momentarily start, then stop) to check rotation.

DRIVER MUST ROTATE

COUNTERCLOCKWISE when looking down at

top end of motor. To change the direction of

rotation on a three-phase motor, interchange any

two line leads. To change direction of rotation on

a two-phase motor, interchange the leads of either

phase.
g) See impeller adjustment instructions (section 5.3)

before bolting the pump and driver half of the

coupling together.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

4.1.6.2 Installation of solid shaft driver with
jacking screws

a) Clean driver mounting flange on discharge head

and check for burrs or nicks on the register and
mounting face. Oil lightly.

b) Center motor over pump and rotate to align

mounting holes. Rotate junction box into desired
position.

c) Lower driver carefully into place. Mount the dial

indicator base on the O.D. of the motor half
coupling. Set the indicator on the pump shaft,
position the dial to zero being careful that the
indicator is in direct line with one of the
jackscrews. Record this reading then rotate the
motor shaft and indicator 180 degrees. Record
this reading being careful to note plus or minus
values. Take the difference of the two readings
and using the jackscrews move the motor one­half of the difference. Repeat this step until the
T.I.R. reading is a maximum of 0.051mm
(0.002in.). Then repeat this step for the set of
jack screws located 90 degrees to the first set.
Once all readings are within 0.051mm (0.002in.),
tighten motor bolts and check for any movement
in readings.

d) Check driver manufacturer's instructions for

special instructions including lubrication
instructions and follow all "startup" instructions.

e) Drivers should be checked for rotation at this

time. Make electrical connections and "bump"
motor (momentarily start, then stop) to check
rotation. DRIVER MUST ROTATE COUNTER­CLOCKWISE when looking down at top end of
motor. To change the direction of rotation on a
three-phase motor, interchange any two line
leads. To change direction of rotation on a two­phase motor, interchange the leads of either
phase.

f) See impeller adjustment instructions (section 5.3

before bolting the pump and driver half of the
coupling together.

4.2 Part Assemblies

Motors may be supplied separately from the pumps.
It is the responsibility of the installer to ensure that
the motor is assembled to the pump and aligned as
detailed in section 4.5. Discharge head column
piping and the pump assembly are supplied either
separately or as fully assembled depending upon the
pump size and weight. If the parts are shipped
separately, it is the customer’s responsibility to install
and align the pump with driver to the satisfaction of
Flowserve’s installation instructions.

4.3 Foundation

There are many methods of installing
pump units to their foundations. The correct method
depends on the size of the pump unit, its location and
noise vibration limitations. Non-compliance with the
provision of correct foundation and installation may
lead to failure of the pump and, as such, would be
outside the terms of the warranty.

The foundation may consist of material that will afford
permanent, rigid support to the discharge head and will
absorb expected stresses that may be encountered in
service.

Concrete foundations should have anchor bolts
installed in sleeves that are twice the diameter of the
bolt to allow alignment and has holes in the mounting
plate as illustrated in the detail below.

When a suction barrel is supplied as in the case of the
type "TF" discharge head, the suction vessel must
provide permanent, rigid support for the pump and
motor. It should be mounted on a firm foundation.

Detail of a typical foundation bolt, grouted.

Figure 4.4

MOUNTING PLATE

25mm (1in.)

2x "D" DIA PIPE

4X "D" SQUARE

PLATE

6 mm(0.25 in.)

ANCHOR BOLT

NUT

GROUT

10 X ''D"

38 mm(1.5 in.) min.

Page 22 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

4.3.1 Leveling of pumps mounted on the
discharge head flange

Example of a typical discharge head with the

mounting flange

Figure 4.5

DISCHARGE

HEAD FLANGE

372

373

CONCRETE

101

Some wet pit pumps are installed directly by using
the flange that comes as an integral part of the
discharge head. The pump is lowered into the pit and
aligned with the anchor bolts [372].

The mounting flange is shimmed to achieve required
level by using a precision machinist’s level. The

pump is to be leveled to within 0.08 mm/m (0.001
in./ft). The data to be recorded for future reference.

Anchor bolt nuts [373] are tightened sufficient enough
to hold down the pump in place.

Grout is poured and allowed to set for at least 72~80
hours (cure as required) before any further work is
done on the pump.

If leveling nuts are used to level the
base, they must be backed off as far as possible prior
to grouting.

Always shim near foundation bolts and then back off
the leveling nuts. Now tighten the foundation bolts. If
done otherwise there is a risk of significantly lowering
the structural natural frequency that could result in
separation of the base from the grout.

Directly mounted pumps are not user
friendly for service. Re-installation of these pumps
requires re-leveling and re-grouting.

4.3.2 Leveling of pumps mounted on a

soleplate and the soleplate is grouted

Some pumps are mounted on a separate plate known
as soleplate [23]. In such cases, the level shall be
set with a master level or a precision machinist’s

level. The mounting surface needs to be leveled to
within 0.08 mm per m (0.001 in. per one ft).

The level should not exceed 0.125 mm (0.005 in.)
elevation difference taken on any two points on the
individual soleplate. Accurate shimming and grouting
of the soleplate is very important. Record the leveling
data for future reference. Grout the soleplate and
allow to set at least 72~80 hours (cure as required)
before the pump is lowered into the pit. Align the
discharge head boltholes with the anchor bolts [372].

Check and adjust the pump level to within 0.08
mm per m (0.001 in./ft) with respect to the soleplate

and torque the nuts [373] to the required level.

Example of pump mounted on a soleplate

Figure 4.6

304

372

373

CONCRETE

FOUNDATION

DISCHARGE

HEAD FLANGE

23

SOLE
PLATE

101

4.3.3 Leveling of pumps with the suction barrel
(also referred as “Can” VTPs)

The suction barrel [315] is first lowered into the pit and
aligned with the anchor bolts [372]. The suction barrel
flange is leveled by using a master level or a precision
machinist’s level. Levels should be taken on the
equipment mounting surfaces. The suction barrel
flange mounting surface needs to be leveled to within

0.08 mm per m (0.001 in./ft) using shims and

grouted. Allow the grout to set for at least 72~80

hours before the pump is installed. Check the barrel
mounting surface level after the grout is set and then
proceed with the pump installation. Lower the pump
assembly into the pit and align the discharge head
flange bolt holes to the anchor bolts [372].

Check and adjust the pump level with respect to the
barrel flange to within 0.08 mm per m (0.001 in./ft)
and final torque the nuts [373]. The leveling data to be
recorded for future reference.

Page 23 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Example of a pump installed with a suction barrel.

Figure 4.7

304

DISCHARGE

HEAD FLANGE

372

373

374

CONCRETE

FOUNDATION

315

101

4.3.4 Leveling of pumps with suction barrel
mounted on a soleplate

Bolt the soleplate [23] to the bottom of the suction
barrel plate. Then proceed to level the barrel mounting
surface per paragraph 4.3.3.

Example of pump with a suction barrel mounted on a

soleplate

Figure 4.8

372

373

374

304

DISCHARGE

HEAD FLANGE

23

SOLE

PLATE

Grouting provides solid contact between the pump
unit and foundation that prevents lateral movement of
running equipment and dampens resonant vibrations.

Foundation bolts should only be fully

tightened after the grout has been cured.

4.5 Initial Alignment

4.5.1 Thermal expansion

The pump and motor will normally
have to be aligned at ambient temperature and
should be corrected to allow for thermal expansion at
operating temperature. In pump installations
involving high liquid temperatures, the unit should be
run at the actual operating temperature, shut down
and the alignment checked immediately.

4.5.2 Preparation before alignment

To ensure proper alignment the following items are
very important.

a) All machined mating surfaces (such as the

mating flanges of pump and motor) must be
clean and free of burrs and nicks.

b) Exterior strain must not be transmitted to the

pump. The most common cause of trouble is
forcing the piping to mate with the pump. It is
recommended that flexible connectors be installed
in the piping adjacent to the pump.

c) All threads should be checked for damage and

repaired if necessary. Lubricate all threaded
connections with a suitable thread lubricant (an
anti-galling compound).

4.5.3 Alignment methods

Ensure pump and driver are isolated

electrically and the half couplings are disconnected.

The alignment MUST be checked.
Although the pump will have been aligned at the

CONCRETE

FOUNDATION

315

101

4.4 Grouting

Where applicable, grout in the foundation bolts.
After adding pipe work connections and re-checking
the coupling alignment, the mounting plate/soleplate
should then be grouted in accordance with good
engineering practice. If in any doubt, please contact
Flowserve service center for advice.

factory it is most likely that this alignment will have
been disturbed during transportation or handling.
If necessary, align the motor to the pump, not the
pump to the motor.

The motor assembly may also have to be
adjusted in the horizontal direction to line up the
driver and shaft centers. Alignment screws are
provided to lock the motor assembly in its final
aligned position.

Page 24 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

A

See section 5.3.2.1 for final coupling alignment for
solid shaft.

Before bumping motor make sure that the
coupling halves are not touching and that the driver
can rotate freely without rotating the pump. Driver
half coupling must be in proper position so the
circular key will not come out.

4.5.4 Angular and parallel misalignment

Check the direction of pump rotation
before the coupling is fully connected. The power
supply to the driver to be connected only after the
final alignment is complete.

Figure 4.9

a)

Angular offset

Axial offs e t

b)

Figure 4.10

Parallel

ngular

a) Pumps with thick flanged non-spacer couplings

can be aligned by using a straight-edge across
the outside diameters of the coupling hubs and
measuring the gap between the machined faces
using feeler gauges, measuring wedge or
calipers.

b) When the electric motor has sleeve bearings, it is

necessary to ensure that the motor is aligned to
run on its magnetic centerline.

Refer to the motor User Instructions for details.

A button (screwed into one of the shaft ends) is
normally fitted between the motor and pump shaft
ends to fix the axial position.

c)

Paralle l o ffse t

a) Angular Offset: The median lines of shaft

intersect halfway between the ends of the two
shafts.

b) Axial Offset: Another offset is the displacement

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

c) Parallel Offset: The median lines run parallel.

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

For couplings with narrow flanges use a dial indicator
as shown in the detail to check both parallel and
angular alignment.

If the motor does not run in its
magnetic center the resultant additional axial force
may overload the pump thrust bearing.

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

4.6 Piping

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

4.6.1 Pipe work velocities

In order to minimize friction losses and hydraulic
noise in the pipe work it is good practice to choose
pipe work that is one or two sizes larger than the
pump suction and discharge.
Typically, main pipe velocities should not exceed 2
m/s (6 ft/sec) on the suction and 3 m/s (9 ft/sec) on
discharge.

Page 25 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Take into account the available NPSH that must be
higher than the required NPSH of the pump.

Never use the pump as a support for

piping.

4.6.2 Maximum forces and moments allowed on
APKD pump flanges (See table 4.6.2.1)

Maximum forces and moments allowed on the pump
flanges vary with the pump size and type. To
minimize these forces and moments that may, if
excessive, cause misalignment, hot bearings, worn
couplings, vibration and possible failure of the pump
casing. The following points should be strictly
followed.

Figure 4.11

a) Prevent excessive external pipe load.
b) Never draw piping into place by applying force to

pump flange connections.

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

due to internal pressure, acts on the pump flange.

Ensure piping and fittings are flushed

before use.

Ensure that the piping arrangement has been
provided to flush the pump before removal in cases of
hazardous liquid pumps.

DISCHARGE

SUCTION

4.6.2.1 Table of maximum forces and moments allowed on APKD pump flanges

Discharge Head Size mm(in.)

Head
Type

HF
LF

&

TF

Forces &
Moments

Fx

Fy

Fz

Mx

My

Mz

100

(4)

1.05

(240)

1.35

(300)

0.90

(200)

1.00

(740)

0.50

(380)

0.75

(550)

150

(6)

1.60

(360)

2.00

(450)

1.35

(300)

1.50

(1 100)

0.75

(570)

1.15

(850)

200

(8)

2.25

(510)

2.95

(660)

1.85

(420)

2.10

(1 560)

1.05

(780)

1.55

(1 140)

255

(10)

2.95

(660)

3.65

(820)

2.45

(550)

2.75

(2 030)

1.35

(990)

2.10

(1 540)

305
(12)

3.35

(750)

4.00

(900)

2.65

(600)

3.05

(2 250)

1.50

(1 100)

2.30

(1 700)

355
(14)

3.55

(800)

4.45

(1 000)

2.90

(650)

3.20

(2 350)

1.55

(1 150)

2.35

(1 750)

400
(16)

4.20

(950)

5.10

(1 150)

3.35

(750)

3.65

(2 700)

1.85

(1 350)

2.70

(2 000)

460
(18)

4.90

(1 100)

5.80

(1 300)

4.00

(900)

4.05

(3 000)

2.00

(1 500)

3.05

(2 250)

508
(20)

5.34

(1 200)

6.25

(1 400)

4.45

(1 000)

4.45

(3 300)

2.50

(1 850)

3.40

(2 500)

610
(24)

6.00

(1 350)

7.10

(1 600)

4.90

(1 100)

5.40

(4 000)

2.70

(2 000)

4.05

(3 000)

760
(30)

7.10

(1 600)

8.45

(1 900)

5.55

(1 250)

6.50

(4 800)

3.25

(2 400)

4.90

(3 600)

Units: Force (F) in kN (lbf); Moments (M) in kNm (lbf·ft)

 Forces and moments shown for TF head are for the discharge flange. For the suction flange, use the

values for the next large size head.

 Loads shown are maximum allowable for standard construction. Contact Flowserve if higher values are

required or temperatures are higher than ambient

915
(36)

8.45

(1 900)

9.80

(2 200)

6.25

(1 400)

7.60

(5 600)

3.80

(2 800)

5.70

(4 200)

Page 26 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

4.6.3 Auxiliary piping

4.6.3.1 Drains

Normal pump leaks and gland leakage to be
drained through a separate piping arrangement or
back into the suction/sump.

4.6.3.2 Pumps fitted with gland packing

The pumped liquid is allowed to flow through the
gland packing at discharge pressure and drained
out of the pump or re-circulated back into the
suction.

4.6.3.3 Pumps fitted with mechanical seals

Auxiliary piping to circulate the flushing liquid back
into the suction is required. In case of external
clean source requirements for pump applications
such as high temperature service, contaminated
fluids, oxidizing fluids, a special piping plan to carry
the clean liquid into the seal chamber with
adequate pressure is required and several piping
plans are available to suit the specific pump
application.

4.6.3.4 Seal Injection

Seal injection into the condenser pump stuffing box
is required for both the packed box and mechanical
seal designs the injection is necessary to:

A) Lubricate either the packing or seal face
during operation: and,

B) Provide a positive liquid seal at the stuffing
box when the pump is idle and the condenser is
under vacuum to prevent air leakage into the
system

The piping plans and flush supply are to
be selected based on the application and operating
parameters.

4.6.4 Final checks

After connecting the piping to the pump, rotate the
shaft several times by hand to ensure no pipe
strain. If pipe strain exists, correct piping.

4.7 Electrical Connections

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

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.

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

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

A device to provide emergency stopping must

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

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

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

See section 5.4, Direction of
rotation before connecting the motor to the
electrical supply.

4.8 Final shaft alignment check

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

4.9 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.

Page 27 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

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 the
bearings, it is recommended that temperature
and/or vibration monitoring is done on a regular
basis.

5 COMMISSIONING, START-UP,

OPERATION AND SHUTDOWN

These operations must be carried
out by fully qualified personnel. Turn off power
supply for safety while pump commissioning is in
progress.

5.1 Pre-commissioning procedure

The gland is to be filled with grease and flush
supply to be in place. Flush piping to be checked
for leaks. Mechanical seals to be checked for leaks,
flush flow and pressure.

a) For can pumps check all vent connections for

complete filling of th e p ump. T he v entin g
procedure can take from 10 minutes up to 2
hours, depending on the kind of fluid.

b) Check the direction of rotation of the pump

(Coupling spacer dismantled). Should be
counter clockwise when viewed from the driver
end.

c) The pump rotor and the shaft seal must be in

correct axial position.

d) Check the readiness of all auxiliary systems

(seal sys., lubrication system etc.,) for startup.

e) All pipe work, including the internal and the

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

f) Turn the pump by hand, if required with the help

of a lever, to check the free rotation of the rotor.
The rotor must turn uniformly and noiselessly.

Some resistance may be felt due to the friction in
the bearings and seals.

g) Check the readiness of the driver for startup.

Refer to the manual for the driver to be sure that
all precautions are in place to energize the
motor.

5.2 Pump lubricants

Other than the stuffing box lubrication, mechanical
seal and/or lineshaft lubrication, the pump will not
require further periodic lubrication. On water
pumps, the suction bearing on the bowl assembly
should be repacked when required. If the pump will
be started after a longer storage period, the
bearings should be first flushed and cleaned by
using a suitable cleaning agent. It is not necessary
to remove the oil sprayed for short or long-term
storage as this will mix up thoroughly with the
lubrication oil.

Re-checking the motor lubrication should
be in accordance with the motor manufacturer’s
user instructions supplied separately with the
pump.

5.2.1 Open lineshaft lubrication

Open lineshaft bearings are lubricated by the
pumped fluid on short-coupled units less than 15 m
(50 ft) long and will usually not require pre or post­lubrication. Care is to be taken to ensure that the
gland or seal is supplied with the required flush flow.

All open lineshaft pumps where the static water level
is more than 15 m (50 ft) below the discharge head
should be adequately pre-lubricated before starting
the pump.

5.3 Impeller adjustment

Proper impeller adjustment positions the impeller
inside the bowl assembly for maximum
performance. The impellers must be raised slightly
to prevent them from dragging on the bowls, but not
raised too high so as to adversely affect hydraulic
performance.

The impeller must be down against the bowl seat
when starting impeller adjustment. When pumps are
subjected to suction pressure, the pressure acting
against the shaft tends to raise it. Make sure the
shaft is down when starting to adjust the impellers.

5.3.1 Impeller axial clearance setting

a) Install indicator bracket on pump stuffing box

extension [348] and arrange indicator so that
tip is located against lower hub face of the
pump half coupling [44]. Determine that the

Page 28 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

pump rotor is in the full down position and set
the dial indicator at "ZERO".

b) Determine that the adjusting nut [66A] is in its

full down position. With the pump rotor in the
full down position, raise the shaft (by jacking) to
the upper limit of its travel. Measure the total
vertical rotor travel by use of the dial indicator.
Divide the total vertical measurement in half
and record this number.

c) With the pump rotor in the full down position

again, reset the dial Indicator at "ZERO". Turn
the adjusting nut [66A] until its upper face
contacts the face of the coupling spacer [314].

d) Place a scale against the side face of the

adjusting nut [66A] to measure the distance
that the adjusting nut moves downward as it is
backed-off from the coupling spacer [314]. Turn
the adjusting nut [66A] until the distance it has
moved away from the coupling spacer [314]
equals one half of the total vertical rotor travel,
computed and recorded in Step 2 above.

If the coupling bolt holes do not line up
when the adjusting nut [66A] has been backed-off
the desired distance from coupling spacer [314],
continue turning the adjusting nut counter­clockwise to reach the nearest bolt hole.

5.3.2 Impeller adjustment for a solid shaft

driver

Impeller adjustment when using solid shaft drivers is
accomplished in the adjustable flanged coupling
located below the driver.

5.3.2.1 Adjusting adjustable flanged coupling

a) Assemble coupling on pump shaft and driver

shaft (if not installed earlier).
b) Check motor direction of rotation.
c) Check and write down Flowserve

recommended impeller setting for final

adjustment.
d) Pump to motor alignment and final coupling

 Mount two magnetic indicator bases on the

discharge head at 90 degrees to each other

 Set the indicator tips on the shaft just above

the seal and at 90 degrees to each other.
(Usually parallel and perpendicular to the
discharge nozzle) push the shaft (parallel to
discharge) back and forth (without bending
shaft)

 Note and record the minimum and maximum

indicator readings. Do the same procedure
at 90 degrees to the discharge

 Set the shaft in the center of the maximum

and minimum indicator readings both

directions. If the shaft will not stay in this
position, use small wooden wedges between
the shaft and seal bolts to hold the shaft.
The indicators can now be removed

Figure 5.1

DIAL
INDICATOR #2

DIAL
INDICATOR #1

IF NEEDED
INSERT
PACKING
PIECES/WEDGES

MECHANICAL
SEAL

ALL AROUND
TO CENTER
THE SHAFT

 Alternate method for pump with packing:

Using an inside micrometer, measure the
space between the shaft and the packing box
bore. Do this both parallel and perpendicular
to the discharge nozzle

 Using the wedges center the shaft so the

measurements taken at 180 degrees to each
other are within 0.10 mm (0.004 in.) of being
equal

(For pumps using jackscrews for motor go to
step f).

e) Mount the magnetic base on the drive half

coupling (a band clamp may be necessary to
hold base due to limited space). Position the tip
of the indicator on the pump shaft just above the
seal. Slowly rotate the driver shaft.

Figure 5.2

MOTOR HALF
COUPLING

STUFFING BOX
EXTENSION

SECURE WITH TWO BO LTS

RIGID BRACKET

DIAL INDICATOR

CENTER SHAFT IN STUFFING
BO X U SING F O UR W OOD OR
METAL WEDGES

Page 29 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Note and record the T.I.R. reading. If this

reading is more than 0.25 mm (0.010 in.) for WA

and WSA couplings or 0.15 mm (0.006 in.) for

PA and PSA couplings, unbolt the drive and

reposition the driver in the direction required to

reduce the T.I.R. to within the allowable limits.

If a register fit is used for alignment,
driver will be able to be moved only a few
thousandths of an inch. If enough movement is
not obtainable then the male register can be
filed to obtain acceptable T.I.R. readings (Go to
step g).

f) On pumps using jackscrews for motor

alignment, mount the dial indicator base on the
O.D. of the motor half coupling. Set the
indicator on the shaft, position the dial to zero
being careful that the indicator is in direct line
with one of the jackscrews. Record this reading
then rotate the motor shaft and indicator 180
degrees.

Record this reading being careful to note plus or
minus values. Take the difference of the two
readings and using the jackscrews move the
motor one half of the difference. Repeat this
step until the T.I.R. reading is a maximum of

0.05 mm (0.002 in.).
Then repeat this step for the set of jackscrews

located 90 degrees to the first set. Once all
readings are within 0.05 mm (0.002 in.) tighten
motor bolts and check for any movement in
readings.

g) Set the impeller setting gap between the

adjusting nut and the driver portion of the
coupling. See impeller setting data supplied
along with the pump. If this information is not
found, contact Flowserve. Align the match
marks on the pump half coupling with the driver
half coupling. On pumps with enclosed
impellers the match marks can be lined up by
increasing the impeller gap until the marks are
in line with the driver half coupling marks.

h) Using 2 bolts of the coupling, at 180 degrees to

each other, slowly raise pump half coupling until
impellers are just lifted off the seat (This can be
gauged by trying to turn shaft by hand. At the
point the impellers are lifted the pump will turn).
Be sure to lift both sides evenly.

i) Measure the resultant gap between the motor

half coupling and the adjusting nut.

j) Find the difference between the original gap and

the new gap. Add this difference to the original
gap and reset the adjusting nut.

k) Bolt the coupling together and tighten bolts by

tightening opposite sides.

l) Remove wooden wedges, if used. Mount

magnetic base on pump and set the tip of
indicator on the shaft just above the seal.
Slowly rotate the shaft and note the T.I.R.
reading.

Unless otherwise specified, the allowable T.I.R.
readings are:

 WA and WSA couplings 0.10 mm (0.004 in.)
 PA and PSA couplings 0.05 mm (0.002 in.)

If the reading is larger than the allowable values
specified above, unbolt the pump and rotate the
driver portion of the coupling to different hole and
repeat steps (h) and (i) until acceptable readings are
obtained.

m) If a mechanical seal is used, adjust the

mechanical seal at this time.

5.4 Direction of rotation

Ensure the pump is given the same
rotation as specified or as marked on the
pump/driver. Please contact Flowserve
representative, if you have any questions before
the startup.

To avoid dry running the pump must either be filled
with liquid or have the flexible coupling
disconnected before the driver is switched on.

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.

5.5 Guarding

Guarding is supplied fitted to the pump set.
Fasteners for guards must remain captive in the
guard to comply with the Machinery Directive
2006/42/EC. When releasing guards, the fasteners
must be unscrewed in an appropriate way to ensure
that the fasteners remain captive. Whenever
guarding is removed or disturbed ensur e that all the
protective guards are securely refitted prior to start-up

Page 30 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Machinery to be protected at all times by Flowserve
provided safety guards or per applicable local or
national standard. Compliance is mandatory for
some regions of the world and in explosive
environments.

5.6 Priming and auxiliary supplies

Ensure 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.

5.7 Starting the pump

Ensure flushing and/or cooling/

heating liquid supplies are turned ON before
starting the pump.

a) CLOSE the outlet valve (or partially open in

some cases).
b) OPEN all inlet valve.
c) Prime the pump & check lubrication system in

operation (check the liquid level).

d)
e) Check the motor connections.

f)

5.7.1 Pre-starting checks

Before starting the pump the following checks
should be made.
a) Rotate the pump shaft by hand to make sure

b) Has the electric motor been properly lubricated

c) Has the electric motor been checked for proper

d) Check all connections to the driver and control.

Ensure all vent connections are closed

before starting.

Do not run the pump with the
outlet valve closed for a period longer than 30
seconds.

the pump rotates freely and the impellers are
correctly positioned.

in accordance with the instructions furnished
with the driver?

rotation? If not, the pump must be
disconnected from the driver at the coupling
before checking. The electric motor must rotate
counter-clockwise when looking down on the
top of the driver.

Do not overfill the grease cavity. Over greasing
can lead to failure of the thrust bearing.

e) Check that all piping connections are tight.
f) Check all foundation bolts for tightness.
g) Check all bolting connections for tightness

(coupling bolts, mechanical seal gland bolts,
driver bolts etc).

h) Make sure the mechanical seal is properly

adjusted and locked into place. Ensure that all
seal spacers are in the running position prior to
operation.

i) All guards must be secured in position prior to

pump startup to prevent possible contact with
rotating parts.
To ensure proper alignment three items are
very important during installation and they are:

 All machined mating surfaces (such as the

mating faces of the pump and motor) must
be clean and free from burrs and nicks.These
surfaces should be cleaned thoroughly with a
scraper, wire brush and emery cloth if
necessary and all nicks or burrs removed
with a fine file

 Exterior strain must not be transmitted to the

pump. The most common cause of trouble in
this respect is forcing the piping to mate with
the pump. It is recommended that flexible
connectors be installed in the piping adjacent
to the pump.

 All threads should be checked for damage

and repaired if necessary. If filing is
necessary, remove the part from the pump if
possible, or arrange to catch all the filings so
they do not fall onto other parts of the pump.
Clean all threads with a wire brush and
approved cleaning solvent, ends of shafts
must be cleaned and any burrs removed
since alignment depends on the shaft ends
butting squarely. Lubricate all threaded
connections with a suitable approved thread
lubricant (an approved anti-galling compound
should be used on stainless mating threads)

j) On pumps equipped with mechanical seals,

clean fluid should be put into the seal chamber.
With pumps under suction pressure, this can be
accomplished by bleeding all air and vapor out
of the seal chamber and allowing the fluid to
enter. With pumps not under suction pressure,
the seal chamber should be flushed liberally with
clean fluid to provide initial lubrication. Make
sure the mechanical seal is properly adjusted
and locked into place. Insure that all seal
spacers are removed prior to operation.

5.7.1.1 Typical safety guards

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Figure 5.3

GUARDS

INS T A L L E D

After initial startup, pre-lubrication
of the mechanical seal will usually not be required
as enough liquid will remain in the seal chamber for
subsequent startup lubrication.

tightened about one half turn at a time at 20 to 30
minute intervals to allow the packing to "run-in".
Under proper operation, a packing set will last a long
time. Occasionally a new ring of packing will need
to be added to keep the box full.

After adding two or three rings of packing, or when
proper adjustment cannot be achieved, the stuffing
box should be cleaned completely of all old packing
and re-packed.

5.7.3 Open shaft lubrication before startup

Open lineshaft bearings are lubricated by the
pumped fluid on short-coupled units less than 15 m
(50 ft) long and usually do not require pre- or post­lubrication.

5.7.4 Initial Starting

a) If the discharge line has a valve in it, it should

be partially open for initial starting. The
discharge valve is intended to add sufficient
system resistance to the pump. Failure to
maintain pump flow rates within the limits of the
pump and motor could result in severe
damage.

b) Start the pump and observe the operation. If

there is any difficulty, excess noise or vibration,
stop the pump immediately and refer to the
Trouble Shooting Chart (section 7.0) to
determine the probable cause.

A screen guard is furnished with all
pumps having a two-piece headshaft or an
adjustable flanged coupling. This screen must be
secured in place prior to pump startup to prevent
possible contact with rotating parts. Typical
arrangement is shown in section 5.7.1.1.

5.7.2 Stuffing box adjustment

On the initial starting it is very important that the
packing not be tightened excessively. New packing
must be run in properly to prevent damage to the
shaft and shortening of the packing life.

The stuffing box must be allowed to leak for proper
operation. The proper amount of leakage can be
determined by checking the temperature of the
leakage, this should be cool or just lukewarm - NOT
HOT - usually 40 to 60 drops per minute will be
adequate.

When adjusting the packing gland, bring both nuts
down evenly and in small steps until the leakage is
reduced as required. The nuts should only be

Observe extreme caution
when venting and or draining hazardous liquids.
Wear protective clothing in the presence of caustic,
corrosive, volatile, flammable or hot liquids. Do not
breath toxic vapors. Do not allow sparking, flames
or hot surfaces in the vicinity of the equipment.

 Ensure that the unit is vented of all trapped

vapor

 Open the discharge valve as desired to operate

the unit at its design conditions

 Check complete pump and driver for leaks,

loose connections, or improper operation

If possible, the pump should be left running for
approximately one half hour on the initial startup,
this will allow the bearings, packing or seals, and
other parts to "run-in" and reduce the possibility of
trouble on future starts.

If abrasives or debris are present,
upon startup, the pump should be allowed to run

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

until the pumpage is clean. Stopping the pump
when handling large amounts of abrasives (as is
sometimes present on initial starting) may lock the
pump and cause more damage than the pump is
allowed to continue operation.

Every effort should be made to keep abrasives out
of lines, sump, etc. so that abrasives will not enter
the pump.

5.7.5 Frequency of lubrication
The characteristics of the installation and severity
of service will determine the frequency of
lubrication. Lubricant and pump/motor bearing
temperature analysis is useful in optimizing

Motor rating kW (hp) velocity-

0.75-to 7.5 (1-10) N 5.1 (0.20)

7.5 to 75 (10-100) N 5.1 (0.20)
75 to 750 (100-1000) N 5.1 (0.20)-6.1(0.24)
750 to 2238 (1000-3000) N 6.1 (0.24)-7.1(0.28)

N = Normal; Alarm = N X 1.25; TRIP = N X 2.0.

5.7.7 Motor start/stop frequency

Even though motors are normally suitable for at
least two consecutive starts, it is recommended to
restart only after coasting to rest between starts
(minimum of 15 minutes gap), with the motor
initially at ambient temperature. If more frequent
starting is necessary, refer to driver manufacturer’s
instructions or contact Flowserve with details.

lubricant change intervals.
The motor bearing temperature limitations should be

considered for its lubrication requirements. Refer to

stops in any given time affects motor life.

the driver manufacturer’s user instructions supplied
with the pump. If documents are not found contact
Flowserve.

Never mix greases containing

different bases, thickeners or additives.

5.7.6 Normal vibration levels, alarm and trip

Pumps generally fall under classification of rigid

 If the motor is expected to experience multi

starts in any given time, please refer to the driver’s
user instructions before the pump is put into
operation.

5.8 Operating the pump

5.8.1 Venting the pump

support machines within the International Rotating
Machinery standard and maximum vibration levels
are based on those standards

enable all trapped air to escape, taking due care
with the hazardous or hot liquids. Under normal
conditions after the pump is fully vented and

Alarm and trip values for installed
pumps should be based on the actual
measurements (N) taken on the pump in a fully
commissioned (new) condition. Measuring

primed, it should be unnecessary to re-vent the
pump.

Figure 5.4

vibration at regular intervals and recording will help
to track any deterioration in pump or operating
conditions.

5.7.6.1 Typical allowable field vibration values

for vertical turbines- sump or wet pit
types

Motor rating kW (hp)

0.75-to 7.5 (1-10) N 6.1 (0.24)

7.5 to 75 (10 -100) N 6.1 (0.24)
75 to 750 (100 -1000) N 6.1 (0.24)-7.1 (0.28)

N = Normal; Alarm = N X1.25; TRIP = N X 2.0.

Vibration
velocity­unfiltered

Vibration
mm/sec (in./sec) rms

SUCTION
SOURCE

5.7.6.2 Typical allowable field vibration values

for vertical turbines with suction barrel

Vibration Vibration

unfiltered

mm/sec (in./sec)
rms

The number of motor start and

Make sure that the pump is vented to

DISCHARGE VENT LINE

SUCTION VENT LINE

SEALING LIQUID

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

5.8.2 Pumps fitted with packed glands

If the pump has a packed gland, there must be
some leakage from the gland. Gland nuts should
initially be finger-tight only. Leakage should take
place soon after the stuffing box is pressurized.

The gland must be adjusted evenly to give
visible leakage and concentric alignment of the
gland ring to avoid excess temperature. If no
leakage takes place, the packing will begin to
overheat.

If overheating takes place, the pump should be
stopped and allowed to cool before being re­started. When the pump is re-started, check to
ensure leakage is taking place at the packing
gland.

If hot liquids are being pumped it may be necessary
to loosen the gland nuts to achieve leakage.

The pump should be run for 30 minutes with steady
leakage and the gland nuts tightened by 10
degrees at a time until leakage is reduced to an
acceptable level, normally a minimum of 40-60
drops per minute is required.

Care must be taken when adjusting the gland
on an operating pump. Safety gloves are essential.
Loose clothing must not be worn to avoid being
caught by the pump shaft. Shaft guards must be
replaced after the gland adjustment is complete.

Never run gland packing dry, even

for a short time.

5.8.3 Pumps fitted with mechanical seal

Mechanical seals require no adjustment. Any slight
initial leakage will stop when the seal is run in.

Before pumping dirty liquids, it is advisable, if
possible, to run in the pump mechanical seal using
clean liquid to safeguard the seal face.

External flush or quench should be
started before the pump is run and allowed to flow
for a period after the pump has stopped.

Never run a mechanical seal dry,
even for a short time.

5.8.4 Pump and motor bearing temperature

If the pumps are working in a potentially
explosive atmosphere, temperature or vibration
monitoring at the bearings is recommended.

If pump bearing temperatures (such as thrust
bearings) 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 close watch on the bearing temperatures.
After startup 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.

5.9 Stopping and shutdown

a) Close the outlet valve, but ensure that the

pump runs in this condition for no more than a

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

supplies at a time appropriate to the process.

For prolonged shutdowns and
especially when ambient temperatures are likely to
drop below freezing point, the pump and any
cooling and flushing arrangements must be drai ned
or otherwise protected.

5.10 Hydraulic mechanical and electrical

duty

This product has been supplied to meet the
performance specifications of your purchase order,
however it is understood that du ring the l ife of the
product these may change. The following notes may
help the user decide how to evaluate th e impli cations
of any change. If in doubt contact your nearest
Flowserve office.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

5.10.1 Specific gravity (SG)

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

5.10.2 Viscosity

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

5.10.3 Pump speed

Changing pump speed effects flow, total head, power
absorbed, NPSH

, noise and vibration. Flow varies in

R

direct proportion to pump speed, head vari es as
speed ratio squared and power varies as speed ratio
cubed. The new duty, however, will also be
dependent on the system curve. If increasin g the
speed, it is important therefore to e nsure the
maximum pump working pressure is not exceede d,
the driver is not overloaded, NPSH

> NPSHR, and

A

that noise and vibration are within local requirements
and regulations.

5.10.4 Net positive suction head (NPSH

NPSH available (NPSH

) is a measure of the head

A

)

A

available in the pumped liquid, above its vapour
pressure, at the pump suction branch.

NPSH required (NPSH

) is a measure of the head

R

required in the pumped liquid, above its vapour
pressure, to prevent the pump from cavitating. It is
important that NPSH
between NPSH

A > NPSH

> NPSHR should be as large as

A

possible. If any change in NPSH

. The margin

R

is proposed,

A

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.

5.10.5 Pumped flow

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

6 MAINTENANCE

6.1 General

It is the plant operator's responsibility to
ensure that all maintenance, inspection and
assembly work is carried out by authorized and
qualified personnel who have adequately
familiarized themselves with the subject matter by
studying this manual in detail.
(See also section 1.6.)

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

Guard fasteners must remain captive during
dismantling of guards as described in section 5.4

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

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

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

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

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

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

clothes.
Before working on the pump, take measures to

prevent an uncontrolled start. Put a warning board

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

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, to include the following:

a) Any auxiliary systems installed must be

monitored, if necessary, to ensure they function
correctly.

b) 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.

c) Check for any leaks from gaskets and seals.

The correct functioning of the shaft seal must
be checked regularly.

d) Check bearing lubricant level, and if the hours

run show a lubricant change is required.

e) Check that the duty condition is in the safe

operating range for the pump.

f) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

g) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

h) Check coupling alignment and re-align if

necessary.

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

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

remedies, for fault diagnosis.

b) Ensure equipment complies with the

recommendations in this manual.

c) Contact Flowserve if the problem persists.

6.2.1 Routine Inspection (daily/weekly)

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

vibration and bearing temperatures are normal.

b) Check that there are no abnormal fluid or

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

c) Check that shaft seal leaks are within

acceptable limits.

d) Check the level and condition of lubrication oil.

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

e) Check any auxiliary supplies eg.

heating/cooling (if fitted) are operating
correctly.

f) Refer to the manuals of any associated

equipment if routine checks needed.

6.2.2 Periodic Inspection (every 6 Month)

a)

security of attachment and corrosion.

b) Check pump operation hours to determine if

bearing lubricant shall be changed.

c) The coupling should be checked for correct

alignment and worn driving elements.

Check foundation bolts for

 Refer to the manuals of any associated

equipment for periodic checks needed.

6.2.3 Re-lubrication

6.2.3.1 Pump lubrication

In general, VTPs that are product lubricated will not
require further periodic lubrication. Stuffing box
and mechanical seal needs flow of flush. Enclosed
line shaft pumps have to be provided with the
required oil quantity for an oil lubed system and the
injection lube flow at the required pressure for
injection lubed systems.

6.2.3.2 Driver lubrication

Refer to driver manufacturer’s User

Instructions supplied with the pump.

6.2.4 Impeller re-adjustment

Ordinarily, impellers will not require re-adjustment if
properly set at initial installation.

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

All adjustments of the impellers will
change the seal setting, therefore, the seal must be
loosened from the shaft until the adjustment is
completed and then reset.

6.2.5 Maintenance of the stuffing box

6.2.5.1 General

Maintenance of the stuffing box will consist of
greasing the box when required, tightening the
packing gland occasionally as the leakage becomes
excessive, and installing new packing rings or sets
as required.

6.2.5.2 Greasing the stuffing box

Under ordinary operation, once-a-month greasing of
the stuffing box will be adequate. A high quality
industrial grade # 2 grease is recommended; see the
table below for typical brands and types.

Manufacturer Grease types

Exxon Unirex N2
BP Energrease LS2
Mobil Mobilux 2
Shell Alvania No.2
Texaco Multitak 20
Esso Beacon 2

6.2.5.3 Replacing packing

Remove gland and all old packing. If the box
contains a lantern ring, remove this and all packing
below it using two long threaded machine screws.

Inspect shaft or sleeve for score marks or rough
spots. Be sure by-pass holes (if supplied) are not
plugged. Repair or replace badly worn shaft or
sleeve.

If wear is minor dress down until smooth and
concentric. Clean box bore.

Oil inside and outside of replacement rings lightly
and install in box, staggering joints 90 degrees. Be
sure to replace lantern ring in proper position when
used.

Replace gland and tighten nuts finger tight. The
packing gland must never be tightened to the point
where leakage from the packing is stopped.

A small amount of leakage is required for packing
lubrication.

Packing ring sizes vary with the shaft diameter.
Packing ring size information are as follows.

PACKING RING SIZES

Packing Dimensions

Shaft size Packing ring size Outside diameter of

packing

mm (in.) mm (in.) mm (in.)

25 (1.00) 9.65 (0.38) 44.4 (1.75)
32 (1.25) 9.65 (0.38) 50.8 (2.00)
38 (1.50) 11.17 (0.44) 60.4 (2.38)
43 (1.69) 12.70 (0.50) 68.3 (2.68)
49 (1.93) 12.70 (0.50) 74.6 (2.93)
56 (2.20) 12.70 (0.50) 81.0 (3.19)
62 (2.44) 12.70 (0.50) 87.3 (3.43)
68 (2.68) 12.70 (0.50) 93.7 (3.69)
75 (2.95) 12.70 (0.50) 100.0 (3.93)
82 (3.22) 12.70 (0.50) 107.9 (4.24)
89 (3.50) 15.74 (0.62) 120.6 (4.74)

95 (3.75) 15.74 (0.62) 127.0 (5.00)
102 (4.00) 15.74 (0.62) 133.3 (5.24)
114 (4.50) 15.74 (0.62) 146.0 (5.74)

6.2.5.4 Startup with new packing

Check to see that the by-pass line (if used) is
connected and the packing gland is loose. Start
pump and allow it to run for 20 to 30 minutes. Do
not tighten the gland during this "run-in" period
even if leakage is excessive. Should the new
packing cause excessive heating during "run-in",
flush the shaft and packing box area with cold
water or shut the pump down and allow to cool.

For all repair instructions please call
Flowserve representative or customer service with
the order no. and unit details for specific repair
instruction literature.

All repair work to be carried out by trained and
authorized personnel only. Flowserve’s written
permission may be required for any
disassembly/repair of the pump that is still under
warranty.

6.3 Spare parts

6.3.1 Ordering of spares

Flowserve keep records of all pumps that have
been supplied. When ordering spare parts we
need the following information:

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

1. pump type and pump size

2. serial number of the pump

3. number of the required spare parts

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

The pump size and serial number are as 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.

Please fill out a spare parts request form and send
it to the Flowserve customer service. Contact
Flowserve for a copy of the request form or
assistance to order spare parts (see back page for

contact information).

6.3.2 How to select recommended spares

Generally a list of spare parts supplied along with
the pump that shows the parts that are included in
each of the following two classes of recommended
spares. If you do not find such documentation
please contact Flowserve for the list.

6.3.2.1 Class I minimum

Suggested for Domestic Service when pump is
handling clean non-corrosive liquids and where
interruptions in service are not important.

A list of spares and consumables are generally
included along with this User Instructions and other
documents that you have received along with the
pump and is made specifically to your order. In the
event that the list is not found, please contact
Flowserve with pump type and order no.

6.5 Tools required

Standard tools needed to maintain this pump
are follows.

 Open ended spanners / wrenches (standard

size range)

 Socket spanners / wrenches (standard size

range)

 Allen keys/wrenches
 Standard range of screw drivers
 Soft mallet

Other tools may be required depending
on the accessories/ special parts used per contract.
Flowserve in general is not obligated to ship the
tools with any pump shipped.

6.3.2.2 6.2.2.2 Class II average

Suggested for Domestic Service when pump is
handling abrasive or corrosive liquids and where
some interruptions in continuity of service are not
objectionable.

Please contact Flowserve Sales Representative in
your area to review the spares best suited to meet
your requirements.

6.3.3 Storage of spare parts

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-month intervals.

6.4 Recommended spares and consumables

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APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

6.6 Fastener torques

Torque values shown are for standard
fasteners lubricated with high stress lubricant such
as graphite-oil, moly-disulphite, white lead, etc.

6.6.1 Fastener torques for bowl assembly

Fastener size Torque

mm (in.) Nm (lb·ft)

6 (0.25) 7 (5)

8 (0.31) 14 (10)
10 (0.37) 23 (17)
11 (0.43) 37 (27)

12 (0.5) 54 (40)
15 (0.56) 81 (60)
16 (0.62) 114 (84)
19 (0.74) 183 (135)
22 (0.87) 346 (255)
25 (1.00) 502 (370)
28 (1.12) 678 (500)
32 (1.25) 902 (665)
38 (1.50) 1322 (975)

6.6.2 Torques for couplings screws

Coupling

size #

1 & 2

3-5

6

Flange diameter

mm (in.)

111 or 137

(4.4 or 5.4)

156, 187 213

(6.0, 7.4, 8.4)

250

(10.0)

Nm

(lb·ft)

122
(90)
237

(175)

424

(313)

6.7 Setting impeller clearance

Please see section 5.3 for specific instructions on
impeller adjustment.

6.8 Disassembly

Refer to section 1.6, Safety, before

dismantling the pump.

 Before dismantling the pump make sure that

the power supply is turned off. Pump controls
are in off position, locked and tagged

 Ensure genuine Flowserve replacement part s

are available on hand

 Refer to sectional drawings for part numbers

and identification. See section 8 in this manual

 Contact Flowserve for repair/disassembly/

rework instructions as each order is different
and are made specific to the requirements

Please take precaution during
disassembly that there is no risk of explosion due
to the nature of the
materials/tools/equipments/method used.
Wherever chemical and hazardous materials are
involved, proper safety rules have to be followed to
prevent any dangers to human lives or livestock.
Contact Flowserve for guidance, or local regulatory
agency for specific safety information.

6.7.1 Pump disassembly instructions

See section 8.0 for sectional drawings.
a) Disconnect all cables/wires and cooling water

pipe connections to the driver (if provided).

b) Carefully remove the flush or lubricant

connections and remove any associated piping
that would interfere with the dismantling.

c) Make sure that all the valves are shut

completely to avoid any leaks or spills.

d) Disconnect the coupling halves [471] (the

driver & pump).

e) Disconnect the suction (if used) and discharge

pipe connections to the discharge head.

f) Rig the motor to a suitable hoist and keep the

lifting mechanism in ready state.

g) Remove the motor to discharge head [304]

bolting and remove the motor from the
discharge head and place it on a safe and
appropriate location.

h) If the pump is of shorter length (with or without

can) rig the discharge head along with the
entire pump assembly (see section 2.3 for
lifting) using a suitable hoist (check the building
height clearance before the lifting is attempted)

i) Use eye bolts and hooks as necessary and get

the lifting mechanism in ready state.

j) Lifting of short set pumps

 Remove the fasteners at the discharge

head/foundation/soleplate

 Lift the entire pump assembly by clamping

at the discharge head [304] (See section

2.3)

k) Lifting of deep set pumps

 Remove the fasteners at the foundation

plate or soleplate

 Remove stuffing box/Mechanical seal [349]

completely. Protect the shaft against
damage while lifting the discharge head
[304]

 Lift the pump just enough to access the

first column pipe flange connection

 Support the entire pump just below the first

column pipe joint [101]

Page 39 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

 Disconnect the discharge head [304] and

lift

 Now lift the pump again by using column

pipe flange and disconnect the first section
of column piping

 Remove the bearing retainers [307] and

shaft couplings [70] and repeat the process
until all column piping is disassembled

 Last step is to lift and remove the bowl

assembly

See section 2.3, 4.1.2 and 4.1.3 for related
information.

6.9 Examination of parts

Used parts must be inspected
before assembly to ensure the pump will
subsequently run properly. In particular, fault
diagnosis is essential to enhance pump and plant
reliability.

Before proceeding with assembly, thoroughly clean
all bolts, nuts, threaded connections and mating
faces. Clean up any burrs with a file or emery
cloth.
Before dismantling the pump for overhaul, ensure
genuine Flowserve replacement parts are
available.
Refer to sectional drawings for part numbers and
identification.

Cleanliness and proper lubrication
are required to guarantee ease of re-assembly and
proper pump operation.

6.9.1 Examination of shaft/s

Check the shafts for straightness, pitting and wear.
Remove all burrs or nicks. Shaft damage is usually
best corrected by replacing the shaft.

The shaft must be straight to within 0.127 mm (0.005
in.) total indicator reading. The detail below shows
the recommended method for checking shaft
straightness. If the shaft is not straight, it must be
straightened or replaced. If the deflection is gradual
over a considerable len gth, the shaft can usually
be straightened by supporting on two blocks
straddling the crooked section and applying
pressure to the high side to deflect the shaft in the
opposite direction. If the shaft has a sharp crook
(dog-leg), it is recommended that the shaft be
replaced since the shaft will not always remain
straight, even if satisfactorily straightened.

Figure 6.1

DIAL INDICATOR

ROLLERS

SHAFT

Even if the shaft is new or has been
previously straightened, it is recommended that the
shaft be re-checked at this point to ensure damage
has not occurred in transit or handling.

6.9.2 Examination of bearings

Check all bearings for total clearance over the shaft.
It is recommended that all bearings indicating visual
wear be replaced. In addition, any bearings whose
running clearance exceeds "As New" tolerances by
more than 50% should be replaced (see table

6.8.2.1).

Rubber bearings should always be

replaced when servicing a pump.

Page 40 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

6.9.2.1 Shaft/bearing clearance

Shaft

Size
mm
(in.)

25.40

(1.000)

31.75

(1.250)

38.10

(1.500)

42.86

(1.690)

49.21

(1.940)

55.56

(2.190)

61.91

(2.440)

68.26

(2.690)

74.61

(2.940)

82.55

(3.250)

88.90

(3.500)

95.25

(3.750)

101.60
(4.000)

114.30
(4.500)

127.00
(5.000)

Shaft

Diameter/Tolerance

Min Dia- Max Dia

mm
(in.)

25.35

(0.998)

31.70

(1.248)

38.05

(1.498)

42.81

(1.685)

49.16

(1.935)

55.51

(2.185)

61.86

(2.435)

68.21

(2.685)

74.56

(2.935)

82.47

(3.247)

88.82

(3.497)

95.17

(3.747)

101.58

(3.997)

114.22

(4.497)

126.92

(4.997)

25.40

(1.000)

31.75

(1.250)

38.10

(1.500)

42.86

(1.687)

49.21

(1.937)

55.56

(2.187)

61.91

(2.437)

68.26

(2.687)

74.61

(2.937)

82.55

(3.250)

88.90

(3.500)

95.25

(3.750)

101.60
(4.000)

114.30
(4.500)

127.00
(5.000)

Bearing
Clearance
(Max/Min)

mm
(in.)

0.28/0.13

(0.011/0.005)

0.35/0.15

(0.012/0.006)

0.33/0.18

(0.013/0.007)

0.36/0.18

(0.014/0.007)

0.38/0.23

(0.015/0.008)

0.41/0.23

(0.016/0.009)

0.41/0.23

(0.016/0.009)

0.43/0.23

(0.017/0.009)

0.43/0.23

(0.017/0.009)

0.46/0.25

(0.018/0.010)

0.48/0.28

(0.019/0.011)

0.53/0.35

(0.021/0.012)

0.56/0.33

(0.022/0.013)

0.58/0.35

(0.023/0.014)

0.61/0.38

(0.024/0.015)

Bronze, epoxy, carbon and hard-backed rubber
bearings are pressed into their respective bores.
They can either be pressed out or machined on the
inside diameter until the wall is thin enough to
collapse.

Some rubber bearings are the snap-in or glue-in
type. These can be removed by prying inward on the
outside of the bearing to collapse it.

If the bearing bore of the housing is heavily scarred
or corroded, the part should be replaced or reworked
to provide a true bore for the bearing.

Replacement bearings are designed to be pressed
into housings so bores will shrink to "as new"
tolerances. Measure the bore of bearings after
pressing and ream as necessary to assure "as new"
tolerances.

6.9.3 Inspection of bowl assembly

condition or strength of all parts such as cap
screws, bowls and bowl threads must be carefully
checked.

When attempting to rework any
part, extreme care must be taken to maintain
alignment of mating parts and ensure “as new”
tolerances.

The inspection, disassembly of bowl assembly
requires expertise and tools to perform the job
correctly. It is recommended to seek the services
of Flowserve trained technicians to inspect and
repair bowl assemblies.

6.9.3.1 Inspection of enclosed impellers

a) Clear all passageways and check for signs of

damage from abrasion or corrosion. Replace
an impeller that shows signs of excessive
wear.

b) Check impeller running clearances against “as

new” tolerances listed in the section 6.8.4. If
the clearances exceed the maximum
tolerances shown by more than 50%, the new
wear rings should be installed to obtain correct
tolerances.

c) If the original unit was furnished with bowl and

impeller wear rings, they may be pressed or
machined off.

Please note that certain repairs may require special
skills and it is recommended to contact Flowserve
authorized service center before attempting any
such repairs.

See wear ring tolerance chart in section 6.8.4.
If the impeller has a balance ring on the topside

(side opposite pumping vanes) running clearances
must be checked.

Please see section 6.9.4 for wearing ring tolerance
chart for enclosed impellers.

When repairing a bowl assembly that has

been in service for several years, the physical

Page 41 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

6.9.4 Wearing ring tolerance chart for enclosed impellers

Bowl ring

internal

diameter.

Nominal

mm
(in.)

50-75

(2-3)

75-100

(3-4)

100-125

(4-5)

125-150

(5-6)

150-180

(6-7)

180-200

(7-8)

200-230

(8-9)

230-255

(9-10)

255-280

(10-11)

280-305

(11-12)

305-330

(12-13)

330-355

(13-14)

355-380

(14-15)

380-405

(15-16)

405-430

(16-17)

430-455

(17-18)

455-485

(18-19)

485-510

(19-20)

510-535

(20-21)

535-560

(21-22)

560-585

(22-23)

585-610

(23-24)

610-635

(24-25)

635-660

(25-26)

660-685

(26-27)

Clearance between bowl and impeller wear

rings

Standard

Galled

mm (in.)

0.330/0.229

(0.013/0.009)

0.356/0.229

(0.014/0.009)

0.381/0.279

(0.015/0.011)

0.533/0.432

(0.021/0.017)

0.635/0.483

(0.025/0.019)

0.635/0.533

(0.025/0.021)

0.660/0.559

0.406/0.305

(0.016/0.012)

(0.026/0.022)

0.686/0.584

(0.027/0.023)

0.432/0.330

(0.017/0.013)

0.711/0.610

(0.028/0.024)

0.737/0.635

(0.029/0.025)

0.762/0.660

0.457/0.356

(0.018/0.014)

(0.030/0.026)

0.788/0.686

(0.031/0.027)

0.813/0.711

(0.032/0.028)

0.890/0.737

(0.035/0.029)

0.508/0.356

(0.020/0.014)

0.914/0.762

(0.036/0.030)

0.940/0.788

(0.037/0.031)

0.965/0.813

0.559/0.406

(0.022/0.016)

(0.038/0.032)

0.990/0.838

(0.039/0.033)

1.010/0.864

(0.040/0.034)

0.610/0.457

(0.024/0.018)

1.041/0.889

(0.041/0.035)

1.070/0.914

(0.042/0.036)

1.092/0.934

(0.043/0.037)

1.118/0.965

(0.044/0.038)

1.143/0.990

(0.045/0.039)

0.660/0.508

(0.026/0.020)

1.168/1.020

(0.046/0.040)

1.194/1.041

(0.047/0.041)

1.220/1.066

(0.048/0.042)

1.244/1.092

(0.049/0.043)

Bowl ring

interference fit

0.101/0.050

(0.004/0.002)

0.127/0.050

(0.005/0.002)

0.152/0.076

(0.006/0.003)

0.178/0.076

(0.007/0.003)

0.203/0.076

(0.008/0.003)

0.254/0.102

(0.010/0.004)

0.280/0.102

(0.011/0.004)

0.305/0.102

(0.012/0.004)

0.305/0.127

(0.012/0.005)

0.330/0.406

(0.013/0.016)

0.356/0.152

(0.014/0.006)

0.381/0.179

(0.015/0.007)

0.406/0.179

(0.016/0.007)

0.406/0.203

(0.016/0.008)

Impeller ring

interference fit

0.076/0.025

(0.003/0.001)

0.101/0.025

(0.004/0.001)

0.127/0.038

(0.005/0.002)

0.152/0.051

(0.006/0.002)

0.178/0.051

(0.007/0.002)

0.229/0.051

(0.009/0.002)

0.229/0.076

(0.009/0.003)

0.254/0.102

(0.010/0.004)

0.279/0.127

(0.011/0.005)

0.305/0.127

(0.012/0.005)

0.330/0.152

(0.013/0.006)

0.356/0.179

(0.014/0.007)

Page 42 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

6.10 Assembly

To assemble the pump, consult the sectional
drawings provided in section 8.0 and some specific
assembly drawings may be necessary .

Refer to seal manufacturer’s instructions for

disassembly and re-assembly of mechanical seals.

The pump that has been purchased may
have order specific assembly and parts
configurations. Specific cross sectional drawings
that reflect the exact pump/parts details can be
purchased from Flowserve. Contact Flowserve for
drawings purchase and cost information.

It is recommended to call for trained Flowserve
technicians for all your assembly needs.

Please take precaution during
assembly process such that there is no risk of
explosion due to the nature of the
materials/tools/equipments/methods used.
Wherever chemicals and hazardous materials are
involved, proper safety rules must be followed to
prevent any dangers to human lives or livestock.
Refer to applicable local regulatory agency
requirements for specific safety information.
To assemble the pump consult the sectional
drawings.

Page 43 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

7 FAULTS, CAUSES AND REMEDIES

FAULT SYMPTOM

Pump overheats and seizes

Pump will not run





Pump vibrates or is noisy





Mechanical seal has short life





Mechanical seal leaks excessively





Pump requires excessive power





Motor Overloaded





Insufficient pressure developed





Insufficient capacity delivered





Pump runs but does not deliver liquid







POSSIBLE CAUSES POSSIBLE REMEDIES



A. SYSTEM PROBLEMS

   Pump not submerged. Check requirements/liquid level. Vent and/or prime.
   

   Suction lift too high or level too low.

   

 Unit running backwards. See start up instruction. Check motor phase/wiring
   Air or vapor pocket in suction line. Check suction line design for vapor pockets.
  Air leaks into suction line. Check suction pipe is airtight.

   

  

  Speed too high.



 

     



    

     Rotating part rubbing on stationary part. Check. Consult Flowserve, if necessary.
     Bearings worn. Replace bearings.


  

 

B. MECHANICAL PROBLEMS

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

   Speed too low.

  

 

   

 

  Wearing ring surfaces worn. Replace worn wear ring/surfaces.

Impeller not adjusted or loose on shaft. Check impeller adjustment. See Section 5.3 for details.

Insufficient margin between suction
pressure and vapor pressure.

 Line check valve backward/stuck. Reverse chuck valve /free the valve.

Intake strainer or impeller plugged or
pump in mud or sand.

Inlet of suction pipe insufficiently
submerged.

Total head of system higher than
differential head of pump.

Total system head is lower than pump
design head.

Specific gravity of liquid different from
design.

Viscosity of liquid differs from the
designed.

Operation at very low capacity.

Operation at high capacity.

Misalignment due to pipe strain.
Improperly designed foundation./Loose

fasteners.
Shaft bent. Check shaft run outs. Consult Flowserve.

Impeller damaged or eroded. Replace. or consult Flowserve for an upgrade.

Check NPSHa>NPSHr, proper submergence, losses at
strainers/fittings.

Start and stop several times or use line pressure if
available to back flush or pull pump to clean.

Check out system design.

Consult Flowserve.

Check system losses or consult Flowserve.

Check the pump design for the type of liquid to be
handled. Consult Flowserve.

Measure. Check minimum permitted. Consult
Flowserve.

Measure value and check maximum permitted. Consult
Flowserve.

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

Check setting of base plate. Tighten, adjust, grout base
as required. Check fasteners and torque.

Page 44 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

FAULT SYMPTOM

Pump overheats and seizes

Pump will not run





Pump vibrates or is noisy





Mechanical seal has short life





Mechanical seal leaks excessively





Pump requires excessive power





Motor Overloaded





Insufficient pressure developed





Insufficient capacity delivered





Pump runs but does not deliver liquid







POSSIBLE CAUSES POSSIBLE REMEDIES





   

   

 

 

  
  Excessive grease in ball bearings. Check method of re-greasing.

 

 

 

     Wrong direction of rotation. Reverse 2 phases at motor terminal box.
 Motor Protector open.



  Motor running on 2 phases only. Check supply and fuses.
   Motor running too slow. Check motor terminal box connections and voltage.

 
  

  

   

  



Leakage under sleeve due to joint
failure.

Shaft sleeve worn, scored, or running
off center.

Mechanical seal improperly installed. Check alignment of faces/damaged parts/assembly
Incorrect type of mechanical seal. Consult Flowserve.

Shaft running off center because of
worn bearings or misalignment.

Impeller out of balance resulting in
vibration.

Solids/Abrasive particles in liquid
pumped.

Internal misalignment of parts
preventing seal ring and seat from
mating properly.

Mechanical seal was run dry. Check mechanical seal/flush supply/pump and repair.
Internal misalignment due to improper

repairs causing impeller to rub.
Excessive thrust caused by a

mechanical failure inside the pump.

Lack of lubrication for bearings.
Improper installation of bearings

(damage during assembly, incorrect
assembly, wrong type of bearing etc).

Damaged bearings due to
contamination.

C. MOTOR/ELECTRICAL
PROBLEMS

Line voltage not correct/faulty control
box/wiring/low voltage.

Blown fuse/breaker open/dead
motor/short or loose connection.

Replace joint and check for damage.

Check and renew defective parts.

Check misalignment and correct if necessary. If
alignment satisfactory check bearings for excessive
wear.

Check. Consult Flowserve for problem resolution
ideas.

Check method of assembly, possible damage or state
of cleanliness during assembly. Check and consult
Flowserve, if necessary.

Check wear condition of impeller, its clearances and
liquid passages.

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

Check method of assembly, possible damage or state
of cleanliness during assembly and type of bearing
used. Remedy and consult Flowserve, if necessary.

Check contamination source and replace bearings.

Check nameplate for voltage and current rating.
Replace faulty motor protectors.

Check wiring diagram.

Check/repair or replace fuses/breakers.

Page 45 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

8 DRAWINGS AND PARTS LISTS

8.1 Cross section: Product lubricated APKD

Typical wet pit pump

See sections 8.1.1 and 8.1.2 for parts details

All the sectional drawings provided in this

section are typical representations of the most
common pump types and are provided for the
purposes of basic understanding of the equipment.
The details shown may not reflect the specifics of
the pump that has been purchased. Order-specific
cross sectional drawings and parts list can be
purchased from Flowserve separately. Contact
Flowserve for ordering and pricing information on
such drawings and documentation

.

Page 46 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

8.1.1 Parts identification: Discharge head and

column assembly

Typical wet pit/sump type design-product lubricated
APKD

8.1.1.1 Parts list-Disch. head and column
Assy.

Ref no. Description

6 PUMP SHAFT
12 TOP SHAFT
14 SLEEVE-TOPSHAFT
39 BEARING SLEEVE
70 KEYED SHAFT SLEEVED

101 COLUMN PIPE
117 BEARING SLEEVE

117A BEARING SLEEVE

131 COUPLING GUARD
304 DISCHARGE HEAD
307 BEARING RETAINER

312B CLAMP RING

326 STUD

326A STUD

327 NUT-HEX

327A NUT-HEX

347 O-RING
348 STUFFING BOX
349 MECHANICAL SEAL
354 STUD
355 NUT-HEX
366 SET SCREW
370 STUFFING BOX-SLEEVE

370A KEY-SLEEVE

414 PLUG
424 FLOWSERVE DISPLAY NAMEPLATE
424 FLOWSERVE SERIAL PLATE
425 DRIVE SCREW
425 DRIVE SCREW

431A O-RING

433 KEY-COUPLING
434 RETAINING RING
471 FLANGED COUPLING ASSEMBLY
490 RETAINING RING

Page 47 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

t

ST

t

t

8.1.2 Parts identification: Bowl assembly

Typical wet pit/sump type design-product lubricated
APKD

8.1.2.1 Parts list-Bowl assembly

Ref no. Description

2 1

2A INTERMEDIATE IMPELLER

8 WRG RING – INT. IMPELLER
8A WRG RING – 1
26 SCREW CAP-SOCKET

26A SCREW CAP-SOCKET

32 KEY-INT. IMPELLER

32A KEY-1
32B KEY-JOURNAL SLEEVE-BOWLS
32C KEY-JOURNALSLEEVE-SUCTION HEAD

55 SUCTION HEAD

126 SHAFT NUT

135C JOURNAL SLEEVE-SUCTION HEAD

310 APKD BOWL

310A APKD BOWL 1

312 IMP. SPLIT RING
319 BOWL WRG RING

319A BOWL WRG RING

322 JOURNAL SLEEVE-BOWLS
322A BEARING SLEEVE – SUCTION HEAD
323A BEARING SLEEVE – BOWLS
326A STUD

327 NUT-HEX
327A NUT-HEX

358 STUD

377 GASKET

426 SCREW CAP-HEX

431 O-RING

434 RETAINING RING
434A RETAINING RING

s

STAGE IMPELLER

STAGE IMPELLER

s

STAGE IMPELLER

s

STAGE

Page 48 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

8.2 Cross section: Suction barrel APKD

Typical

See sections 8.2.1 and 8.2.2 for parts details

All the sectional drawings provided in this

section are typical representations of the most
common pump types and are provided for the
purposes of basic understanding of the equipment.
The details shown may not reflect the specifics of the
pump that has been purchased. Order-specific cross
sectional drawings and parts list can be purchased
from Flowserve separately. Contact Flowserve for
ordering and pricing information on such drawings
and documentation

.

Page 49 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

8.2.1 Parts identification: Discharge
head/column/suction barrel

Typical product lubricated APKD with a suction barrel

8.2.1.1 Parts list-Disch. head and column Assy.

Ref no. Description

6 PUMP SHAFT
12 TOP SHAFT
14 SLEEVE-TOPSHAFT
39 BEARING SLEEVE
70 KEYED SHAFT SLEEVED

101 COLUMN PIPE
117 BEARING SLEEVE

117A BEARING SLEEVE

131 COUPLING GUARD
304 DISCHARGE HEAD
307 BEARING RETAINER

312B CLAMP RING

326 STUD

326B STUD

327 NUT-HEX

327A NUT-HEX

347 O-RING
348 STUFFING BOX
349 MECHANICAL SEAL
354 STUD
355 NUT-HEX
366 SET SCREW
370 STUFFING BOX-SLEEVE

370A KEY-SLEEVE

372 STUD
373 NUT-HEX
374 O-RING BARREL
414 PLUG
416 PLUG
424 FLOWSERVE DISPLAY NAMEPLATE
424 FLOWSERVE SERIAL PLATE
425 DRIVE SCREW
425 DRIVE SCREW

431A O-RING

433 KEY-COUPLING
434 RETAINING RING
471 FLANGED COUPLING ASSEMBLY
490 RETAINING RING

Page 50 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

t

ST

t

t

8.2.2 Parts identification: Column and bowl
assembly

Typical product lubricated APKD with the suction
barrel

8.2.2.1 Parts list- Column and bowl assembly

Ref
no.

26A SCREW CAP-SOCKET
32A KEY-1

32B KEY-JOURNAL SLEEVE-BOWLS
32C KEY-JOURNALSLEEVE-SUCTION HEAD

126 SHAFT NUT

135C JOURNAL SLEEVE-SUCTION HEAD

310 APKD BOWL

310A APKD BOWL 1

312 IMP. SPLIT RING
315 SUCTION CAN
319 BOWL WRG RING

319A BOWL WRG RING

322 JOURNAL SLEEVE-BOWLS
322A BEARING SLEEVE – SUCTION HEAD
323A BEARING SLEEVE – BOWLS
326A STUD

327 NUT-HEX
327A NUT-HEX

358 STUD

377 GASKET

426 SCREW CAP-HEX

431 O-RING

434 RETAINING RING
434A RETAINING RING

Description

s

2 1

2A INTERMEDIATE IMPELLER

8 WRG RING – INT. IMPELLER
8A WRG RING – 1
26 SCREW CAP-SOCKET

32 KEY-INT. IMPELLER

55 SUCTION HEAD

STAGE IMPELLER

STAGE IMPELLER

s

STAGE IMPELLER

s

STAGE

Page 51 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

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 these drawings are supplied
separately, the purchaser should retain those with the
User Instructions.

9 CERTIFICATION

Certificates determined from the Contract
requirements are provided with these instructions
where applicable. Examples are certificates for CE
marking and ATEX markings etc. If required, copies
of other certificates sent separately to the Purchaser
to be retained along with these User instructions.

10 OTHER RELEVANT

DOCUMENTATION AND MANUALS

10.1 Supplementary user instructions

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

component etc are included in the Data Book. If
further copies of these are required they should be
obtained from the supplier for retention with these
user instructions.

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

10.2 Change notes

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

10.3 Additional sources of information

Reference 1:

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

Reference 2:
Pump Handbook, 2
McGraw-Hill Inc., New York, 1993.

Reference 3:

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

Reference 4:

ANSI B31.3 - Process Piping.

nd

edition, Igor J. Karassik et al,

Page 52 of 55 flowserve.com

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FLOWSERVE

NOTES:

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.

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Page 53 of 55 flowserve.com

,......,.

FLOWSERVE

NOTES:

............,

.

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Page 54 of 55 flowserve.com

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13

Your Flowserve factory contacts:

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]

Your local Flowserve representative:

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

Europe, Middle East, Africa

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

Latin America and Caribbean

Flowserve Corporation
Pump
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]

Page 55 of 55 flowserve.com