KSB MEGAFLOW 50-160 Instruction Manual

Operating Instructions Manual
NºA2370.8E/2
KSB MEGAFLOW
Pumps for Sewage, Effluents and Mixtures
1. Application
The KSB MEGAFLOW centrifugal pump is
recommended for industrial and municipal waste water,
as well as all kinds of pulps not liable to plait, sewage
water, chemical effluents.
-Municipal and industrial waste-water treatment
-Drainage
-Pulp and paper
-Food processing
-Sugar and alcohol
-Mining and manufacturing
-Civil construction
2. Design
Horizontal, single-stage, simple horizontal suction and
vertical upwards discharge. The “back-pull-out” design
allows maintenance and repair services through the back
side, without dismantling piping and alignment.
The available hydraulics and impeller types allow proper
selection for the handled liquid and required application.
3. Designation
KSB Megaflow 50 -160 K
Trade Mark
Model / Type
Discharge Nozzle Diameter (mm)
Nominal Impeller Diameter (mm)
Rotor
4. Operating Data
Sizes - DN 50 up to 350
(2 ½” to 14” )
Flow - to 11,000 gpm
(2,500 m
3
/h)
Head - to 328 ft (100m)
Temperature - to 221
º
F (105
º
C)
Max. Suction pressure - to 43 psi (3 bar)
Speed - to 3,500 rpm
LINE: Mega

KS
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Legal information/Copyright
Megaflow Operating Instructions Manual
All rights reserved. The contents provided herein must neither be distributed, copied, reproduced, edited or
processed for any other purpose, nor otherwise transmitted, published or made available to a third party without
the manufacturer's express written consent.
Subject to technical modification without prior notice.
© KSB Brasil Ltda., Várzea Paulista 04/04/2022

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Content
1. Application .......................................................................................................................................................1
2. Description .......................................................................................................................................................1
3. Designation ......................................................................................................................................................1
4. Operating Data..................................................................................................................................................1
5. Introduction ......................................................................................................................................................5
6. Technical Data .................................................................................................................................................6
6.1 Bearings ......................................................................................................................................................7
6.2 Maximum speed ..........................................................................................................................................8
7. Constructive Details ......................................................................................................................................10
7.1 Casing........................................................................................................................................................10
7.2 Nozzle Layout............................................................................................................................................10
7.3 Impeller ......................................................................................................................................................10
7.4 Shaft...........................................................................................................................................................11
7.5 Axial Thrust Balancing...............................................................................................................................11
7.6 Shaft Seal ..................................................................................................................................................11
8. Shaft Seal Selection .......................................................................................................................................12
8.1 Pressure of seal liquid / Wash for pumps with impellers K/ O/ E ..............................................................12
8.2 Sealing flow/ wash.....................................................................................................................................12
8.2.1 Pumps with Impellers K and O ...............................................................................................................12
8.2.2 Pumps with Impeller E............................................................................................................................13
9. Mechanical Seal..............................................................................................................................................13
10. Transportation ..............................................................................................................................................14
11. Service/ Storage............................................................................................................................................14
11.1 Additional procedures of Service and Storage........................................................................................15
12. Installation.....................................................................................................................................................15
12.1 Base Grouting..........................................................................................................................................15
12.2 Base Leveling ..........................................................................................................................................16
12.3 Grouting ...................................................................................................................................................16
12.4 Coupling alignment..................................................................................................................................16
12.5 Suction Pipe Line - Recommendations ...................................................................................................17
12.6 Discharge Pipe Line - Recommendations...............................................................................................19
12.7 Auxiliary pipings and connections ...........................................................................................................20
13. Accessories (Optionals) ..............................................................................................................................20
14. Operation.......................................................................................................................................................21
14.1 First start-up procedure ...........................................................................................................................21
14.2 Immediate steps after first start-up..........................................................................................................21
14.3 Operation supervision..............................................................................................................................22
14.3.1 Weekly supervision...............................................................................................................................22
14.3.2 Monthly supervision..............................................................................................................................22
14.3.3 6 month supervision..............................................................................................................................22
14.3.4 Annual supervision ...............................................................................................................................22
14.4 Shutdown procedure................................................................................................................................22
15. Maintenance ..................................................................................................................................................23
15.1 Bearing Maintenance...............................................................................................................................23

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15.2 Lubrication intervals and oil specifications ..............................................................................................23
15.3 Oil quantity...............................................................................................................................................24
15.4 Shaft Sealing Maintenance......................................................................................................................23
15.5 Wear Parts Maintenance .........................................................................................................................25
15.6 Dismantling instructions...........................................................................................................................26
15.7 Assembly instructions..............................................................................................................................27
16. Operational problems, Probable Causes e Solutions...............................................................................29
17. Cross Sectional Drawing/ Parts List / Materials ........................................................................................31
17.1 Execution with K Impeller – Bearing brackets CS40 and CS50..............................................................31
17.2 Parts List – Execution with K Impeller – Bearing brackets CS40 and CS50...........................................32
17.3 Execution with K Impeller – Bearing bracket AK.....................................................................................33
17.4 Execution with Impeller O – Bearing bracket AK.....................................................................................34
17.5 Parts List – Execution with K/O Impeller – Bearing bracket AK ..............................................................35
17.6 Execution with K/O Impeller – Bearing bracket P65/160.........................................................................36
17.7 Parts List – Execution with K/O Impeller – Bearing bracket P65/160 .....................................................37
17.8 Execution with K/O Impeller – Bearing bracket P80/200S ......................................................................38
17.9 Parts List – Execution with K/O Impeller – Bearing bracket P80/200S...................................................39
17.10 Execution with E Impeller – Bearing bracket AK...................................................................................40
17.11 Parts List – Execution with E Impeller – Bearing bracket AK................................................................41
17.12 Execution with E Impeller – Bearing bracket P65/160X........................................................................42
17.13 Parts List – Execution with E Impeller – Bearing bracket P65/160X.....................................................43
18. Parts Interchangeability...............................................................................................................................44
19. Recommended Spare Parts.........................................................................................................................45

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5. Introduction
KSB has supplied you with an equipment that has been designed and manufactured with a must advanced technology.
Due to its simple and tough construction it will not need much maintenance. With the aim of providing our clients with a
satisfactory, trouble free operation, we recommend to install and care our equipment according to the instructions
contained in this operating instructions.
This manual has been prepared to inform the user about the construction and operation of our pumps, describing the
adequate procedures for handling and maintenance. We recommend that this manual should be handled by the
maintenance supervision.
This equipment should be used in the operational conditions for which it was selected as to: rate of flow, total head, speed,
voltage, frequency, temperature of pumped liquid.
Fig. 1 - Nameplate
For requests about the product, or when ordering spare parts, please indicate the type of pump and
manufacturing order nº (serial nº). This information can be obtained from the nameplate on the actual pump. If the
nameplate is not available, the OP nº. is engraved in low relief on the suction flange, and on the discharge flange
you may find the impeller diameter.
Attention: This manual contains very important instructions and advice. Its careful reading it is an obligation
before installation, electrical connections, first starting and maintenance.
Contents
Designation Chapter Page Designation Chapter Page
Application 1 1 Installation 12 10
Design 2 1 Accessories 13 15
Designation 3 1 Operation 14 16
Operating Data 4 1 Maintenance 15 18
Introduction 5 2 Operational Problems/
Technical Data 6 3 Probable Causes and Solution 16 23
Contructive Details 7 5 Sectional Drawing
Shaft Sealing Selection 8 7 Part List 17 26
Mechanical Seal 9 8 Interchangeability of Parts 18 44
Transportation 10 9 Spare Parts
Storage 11 9 Recommended Spare Parts 19 45
Field for description or
type and size of the pump
Field for description
of manufacturer data
Field for order number
(serial number)

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6. Technical Data
Sizes
Technical Data
Unity
50-160 50-200 65-200 80-200 80-250 65-315
100-250 100-315
80-400
100-400 125-315 150-315 200-315 125-500 150-400 150-500 200-400 200-500 250-500 300-500
Bearing Bracket
CS40
CS50(K)
A40K (O)
CS50
A40K A50K A60K
P65/160X P80/200S
Impeller
K x x x - x x x x x x - x x x - x x - x x
O - x - - x x x - x x - x - - - x x - - -
E - - - x - - x - - - x - - - x - - x - -
Max. allowed
solid diameter
K
mm
34 30 30 - 50 35 54 47 40 45 - 85 80 50 - 60 80 - 75 95
O - 25 - - 35 18 44 - 22 30 - 60 - - - 85 80 - - -
E - - - 55 - - 70 - - - 90 - - - (1) - - 150 - -
GD
2
Rotating element
with water
Kgm
2
0,031 0,064 0,095 0,200 0,215 0,418
(5)
0,598 1.100 1.230 1.246 0,720 0,867 2.620 2.734 2.850 2.060 8.240 4.750 5.900
Hydrostatic test
pressure - (2) (3) (2) (4) (2) (3) (2) (3) (2) (3) (2)
Max. suction pressure
bar
3
Max. discharge pressure
10
Temperature
Minimum
º C
-30
Max.
Liquid
Abrasive
without
washing
90
Not abrasive
105
Abrasive with
washing
105
Axial Thrust Balancing
- Back vanes
Min./Max. Flow - 0,1 .Qopt. / see characteristic curve
Rotation side - Clockwise, seen from the drive side
Maximum rotation - See table 2
Lubricating - Oil, though the automatic resupply glass
Flanges
Cast iron - ANSI B16.1 125lb FF
Stainless steel - ANSI B16.5 150lb RF
Sealing
Chamber
Sleeve ∅
mm
35 45 60 70 80 100
Chamber ∅
55 65 85 95 105 132
Gasket 


10 10 12,5 12,5 12,5 16
Chamber
Comp.
60 60 73 73 87 103
Weight
Cast iron
Kg
45 68 78 95
104 150 136 159 237 243 220 231 224 370 380 385 375 400 740 840
Steel
47 72 82
100 110 159 143 168 251 257 232 245 237 392 402 407 395 423 783 890
Table 1
Notes:
(1) ∅115 for impeller ∅≤335; ∅130 for impeller ∅>335 up to ∅400
(2) According to Hydraulic Institute, max. = 15bar
(3) According to Hydraulic Institute, max. = 6 bar
(4) According to Hydraulic Institute, for impellers K/O max. = 15 bar; for impeller E max. = 6 bar
(5) Pump with impeller K/O, GD
2
= 0,270 Kg.m
2
; with impeller E, GD
2
= 0,640 Kg.m
2

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6.1 Bearings
Pump size Impeller
Max.
allowable
solid
diameter
(mm)
Bearing
bracket
Bearings Max.
allowable
p/n
(CV/rpm)
NDE DE
50-160 K 34 CS40 6208C3 6208C3 0,0180
50-200 K 30 CS50 6310C3 6310C3 0,0500
O 25 A40K NU308 6308C3 0,0458
65-200 K 30 CS50 6310C3 6310C3 0,0500
80-200 E 55 A40K NU308 6308C3 0,0458
80-250 K 50 A40K NU308 6308C3 0,0458
O 35 A40K NU308 6308C3 0,0458
65-315 K 35
A50K NU310 6310C3 0,100
O 18
100-250
K 54
O 44
E 70
100-315 K 47
80-400 K 40 A60K (1)
NU312 6312C3 0,158
O 22
100-400 K 45 A60K
(1)(2)
O 30
125-315 E 90
A60K
150-315 K 85
O 60
200-315 K 80
125-500 K 50
P65/160X NU413 2x
7313BUA 0,310
150-400 E (3)
150-500 K 60
O 85
200-400 K 80
O 80
200-500 E 150
250-500 K 75
P80/200S NU419 2x
7319BUA 0,422
O (3)
300-500 K 95
350-400 K (2)
(3) (3)
350-500 K (2)
350-630 K (2)
Table 2
Notes: (1) For size 100-400 “K” at 1450 and 1750 rpm – bearing bracket P55/140s. Please consult KSB.
(2)
(3)
For size 100-400 “O” at 1450 and 1750 rpm – bearing bracket P65/160ax. Please consult KSB.
Note: Consult KSB for pump sizes 350-400, 350-500 and 350-630.

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6.2 Maximum speed
Pump size Impeller
type
Speed
(rpm)
γ= 1,0 kgf/dm
3
γ= 1,2 kgf/dm
3
γ= 1,4 kgf/dm
3
Maximum Impeller Diameter (mm)
50-160 K/O
1750 169 169 169
2900 169 165 160
3500 160 150 145
50-200 K/O
1750 209 209 209
2900 209 209 209
3500 209 209 200
65-200 K
1750 209 209 209
2900 209 209 200
3500 200 190 - -
65-315 K/O
1450 320 320 320
1750 320 320 320
2900 260 255 245
80-200 E up to 2000 205 205 205
80-250 K/O
1450 260 260 260
1750 260 260 260
2900 230 220 210
80-400 K/O 1450 404 404 404
1750 404 380 370
100-250 K/O
1450 260 260 260
1750 260 260 260
2900 230 215 205
100-250 E
up to 1450 255 255 255
1750 255 255 235
2000 255 235 215
100-315 K/O 1450 320 320 320
1750 320 320 310
100-400 K/O 1450 404 404 404
1750 404 380 360
125-315 E
up to 1160 315 315 315
1450 315 300 270
1750 270 240 240
125-500 K/O
1160 504 504 504
1450 504 490 465
1750 450 400 - -
150-315 K/O
1160 320 320 320
1450 320 310 300
1750 300 290 275
150-400 E
725 400 400 400
875 400 400 388
960 400 388 370
1160 400 370 348
1300 400 348 --
1450 370 -- --
Table 3

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6.2 Maximum speed
Pump size Impeller
type
Speed
(rpm)
γ= 1,0 kgf/dm
3
γ= 1,2 kgf/dm
3
γ= 1,4 kgf/dm
3
Maximum Impeller Diameter (mm)
150-500 K/O
960 504 504 504
1160 504 500 --
1450 504 460 --
200-315 K/O
1160 320 320 320
1450 320 305 295
1750 300 280 270
200-400 K/O
1160 404 404 404
1450 404 404 380
1750 360 330 --
200-500 E
480 500 500 500
580 500 500 500
725 500 480 420
875 500 450 420
960 500 450 420
250-500 K/O
725 504 504 504
960 475 450 430
1160 430 400 --
300-500 K/O
725 504 500 475
960 460 430 410
1160 405 -- --
350-400 K 1160 408 408 408
350-500 K 1160 -- -- --
350-630 K 875 630 630 630
Table 3

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7. Constructive Details
7.1 Casing
Ample clearance volute, one piece casting including support feet. Radially split with discharge cover. Replaceable wear plate
on suction side.
7.2. Nozzle Layout
Axial, horizontal suction and radial vertical discharge. Optionally an intermediate suction piece with clean out and inspection
manhole can be offered.
7.3 Impeller
Three types of impellers are available: K, O e E.
a) Impeller type K :
Closed with two or three channels, they are specially recommended for pumping dirty or muddy liquids with no gases
and without the tendency to form long fiber plaits. Also adequate for paper and cellulose pulp with a mass concentration
up to 3% .
Pumps with 3 channels impellers K (200-315, 150-500, 125-500, 200-400 e 250-500).
Fig.2
b) Impeller Type O:
Multiple vane open impeller. Recommended for liquids containing air, as for example, sugar plants residues without
cane trash, cellulose and paper pulp with a mass concentration up to 6 %.
Fig.3

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c) Impeller type E:
Single vane closed impeller, recommended for liquids containing solids in suspension, as for example, sewage, long
fibers, sludge with air concentration, fruits, vegetables, fish, sugar cane, residues in the food industry, rags, wood
pieces, bones, etc.
Fig.4
The impellers are not directly interchangeable due to their different wear plates (impeller types K and O) or due to
the different casing construction (impeller type E).
7.4 Shaft
The shaft design is a dry type, completely isolated from the pumped liquid, provided with shaft protecting sleeve in the
sealing area and equipped with gasket on impeller nut (or screw) and protecting sleeve region.
7.5 Axial Thrust Balancing
The axial thrust is balancing by back vanes in the impeller, which assuagen essentially the pressure in the chamber and
prevent the deposit of solids in the back side. The remaining thrust is absorbed by the bearings.
7.6 Shaft seal
Gland packing (standard) or optionally by means of a single or double mechanical seal. The shaft seal selection depends on
the handled liquid and required application.
When the shaft seal is made with gland packing, the position of the neck ring (457), neck bush (456), lantern ring (458) and
of the gasket rings are represented in the sectional drawing. The dimensions of chamber and sizes of the gland packing are
mentioned at table 1. The circulation of the liquid, which reaches the lantern ring through holes in the pressure cover has the
function of:
a) lubricate and take off the packing
b) seal the packing against the penetration of abrasive solid particles
c) avoid the outlet of poisonous gases or bad smell
d) avoid the outlet of liquids which transform into gas in contact with the atmosphere
e) seal the gasket chamber against air inlet
If the pumped liquid have abrasive particle, the feed source should be external and by means of clean liquids that can be
mixed to the pumped one. The necessary pressures and flows in the external source are indicated in the Fig. 5 and 6.

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8. Shaft seal Selection
Code Application
0 For liquids containing solids in suspension with low abrasivity. Sealing with clean liquid of
external source with pressure of 0,5 up to 1 bar over the pressure pw (see Type series booklet)
1 Same execution as code 0, however applicable when sealing liquid should not be in contact to
the pumped liquid.
2 For liquids containing abrasive solids in suspension. Washing with clean liquid of external source
with pressure of 0,1 and 0,2 over the pressure pw (see Type series booklet).
3 For liquids free of solids in suspension and positive suction.
Seal though the pumped liquid.
9 Single or double Mechanical Seals
Table 4
Notes: The codes indicated in the Table 3, comply with the seal executions indicated in the Cross Sectional
Drawing according to chapter 17.
8.1 Pressure of seal liquid / Wash for pumps with impellers type K / O / E.
Seal code Pressure (bar) ∆P Seal
(bar) ∆P Wash (bar)
Seal Wash
0 e 1 Pw + AP - 0,1 a 1 -
2 - Pw + AP - 0,1 a 0,2
Table 5
8.2 Sealing Flow / Wash
8.2.1 Pumps with Impellers type K e O
Fig.5
Legend
1
2
3
4
5
6
50-160 50-200 65-315 80-400 125-500 250-500
65-200 100-250 100-400 150-500 300-500
80-250 100-315 150-315 200-400
200-315
Table 6
Notes: For pump size 350, please consult KSB.

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8.2.2. Pump with Impeller type E
Fig.6
Notes: To calculate pressure PW, please consult the Type series booklet.
9. Mechanical Seal
If the pumped liquid is inflammable, explosive, toxic, of high cost, or when after an accurate cost analyze the result is
benefic, we recommend the use of Mechanical Seal. The Mechanical Seal when correctly selected and installed presents
advantage in the maintenance frequency comparing it with gasket. After a short period of adaptation during the operation
there is no more liquid dropping.
The Mechanical Seal consists basically of a fixed ring and one rotating sliding over the fixed one, of which polished surface
remains jointed by means of pressure by spring. The sealing of the rotative ring over the shaft and the sealing of the fixed
ring in the gland, are of appropriate material to the pumped liquid. For a safe and of long duration operation it is important
that the liquid film between the slide surfaces is formed and the consequent heat is properly absorbed by liquid circulation.
Depending on the pumping conditions, this circulation can be expected from the pumped liquid or from external separate
source.
Mechanical Seals are built in many different materials and assemblies, attending all the different chemical and physical
characteristics of the liquids to be pumped.
In the case of supply of Shaft Seal by Mechanical Seal, we will send complementary information.

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10. Transportation
The transportation of the pump and motor assembly or only the pump should be done in accordance to the safety standards.
On lifting, the motor slug should be used to carry the motor only and never the pump-motor assembly.
Fig. 7 – Transportation of the pump through the discharge flange
Fig.8 – Transportation of the pump-motor assembly
Note: Be sure that the coupling guard and foundation bolts are not lost or damaged during transportation
11. Service / Storage
The following procedures of service and storage are performed by KSB and by DEALER NETWORK up to effective delivery
of the pump. It is the responsibility of the client to continue with this procedure after receiving the pump. When the pump is
not subjected to a performance test after is sale, the areas in contact with the pumped liquid which are not painted as:
stuffing box housing, wear rings, flange sealing areas, etc, receive an application of RUSTILO DW-301 by brush.
When the pump is equipped with packing and is subjected to a performance test, it is drained after the test without
disassembling it, and then filled with RUSTILO application, after which the pump is drained.
Shaft exposed area as: shaft end, area between the gland cover and the bearing bracket receive a brush application of
TECTYL 506.
Bearing installed on brackets of oil lubricated pumps receive an application of a sprayed layer of MOBILARMA 524.

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11.1 Additional procedures of Service and Storage
-Pumps stored for periods exceeding one year should be serviced every 12 months. They should be disassembled,
cleaned and the whole process described in the item 11 should be repeated.
-Pumps equipped with PACKING should have their packing removed before storage.
-MECHANICAL SEALS should be cleaned with dry compressed air. No other liquid or material should be applied to
them in order to prevent damage to the secondary sealing as o-rings and gaskets.
-All connections as inlets for liquids from external sources, priming, draining, flushing and cooling should be closed.
-Suction and discharge flanges should be covered to prevent the entry of strange bodies.
-Assembled pumps, waiting to be installed or to start operation should be turned manually every 15 days. If it is difficult
to move them by hand, use a box spanner, protecting the shaft surface at the point of application.
-Wash the surfaces with gasoline or kerosene before applying the protecting liquids.
-Characteristics of the protecting liquids:
Protecting
Liquid
Thickness of the applied
Layer (µm) Drying time Removal Manufacturer
TECTYL 506 From 80 to 100 1/2 up to 1 hour Gasoline, benzene,
diesel oil BRASCOLA
RUSTILO DW301 From 6 to 10 1 up to 2 hours Gasoline, benzene CASTROL
MOBILARMA 524 ≤6 Does not dry Not necessary MOBIL OIL
Table 7 – Protecting Liquids
12. Installation
Our pumps should be installed, leveled and aligned by trained personnel. When this service is done incorrectly it will
originate operational troubles, premature wear and damage beyond repair.
12.1 Base Grouting
Place the foundation bolts in the holes or slots of the foundation block according to boring design: Foundation Drawing.
Between the base and the foundation block and beside the foundation bolts, metallic chocks of the same height should be
fixed with grout together with the foundation bolts, to serve as support for the base.
In order to adhere perfectly to the grout, the chock blocks and foundation bolts should be free of any grease or oil residues.
After the grout set is completed, place the base on the foundation block. See Fig. 9.
Fig. 9 – Base grouting

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12.2 Base Leveling
Check if the base plate is equally resting on its chock blocks. If it is OK, place and tighten uniformly the nuts on the
foundation bolts. With the help of a precision level, check the leveling of the base longitudinally and transversally.
If the base is out of level, loosen the foundation bolts nuts and insert shims, as necessary, between the metallic chock block
and the base, so as to correct the leveling. See fig. 10.
Fig. 10 – Base Leveling
12.3 Grouting
For secure and fastening vibration-free, the pump base must be filled.
Grout should be composed of specific compounds available in the construction appliance market which prevent shrinkage
through grout setting as well as full base filling and do not allow blanks or gapes. See fig. 11.
Fig.11 – Filling of the base with grout
12.4 Coupling alignment
The useful lift of the turning assembly and its operation free of irregular vibrations will rely on the perfect alignment between
the pump and the driver.
The alignment performed at the factory must be remade because during transportation and handling, the motor-pump
assembly is subjected to deformations, which affect the initial alignment.
After the complete set of the grout, perform the alignment, if possible, with the suction and discharge pipe lines already
connected.
This alignment should be performed with the help of a dial indicator for the control of the radial and axial displacements.
Fix the bottom of the instrument to the periphery of one the coupling halves, adjust the position of the feeler perpendicular to
the periphery of the other half of the coupling. Move the dial to zero and move manually the coupling half in which the
instrument basis is fixed, making the dial complete a 360 degrees turn. See Fig. 12. The same procedure should be
performed to control the axial displacement.
See fig. 13.

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Fig. 12 – Radial Control Fig.13 – Axial Control
To correct the alignment, loosen the driver bolts and replace driver over the side face or insert shim to adjust height as
required. Axial and radial alignments should remain with a tolerance of 0.1 mm with the pump and driver set screws tighten
securely. If there is no dial indicator available, use a straight edge placed across the two rims of the sleeve coupling. To
control axially use a feeler gauge. See fig. 14. Observe the sleeve coupling hub clearance specified by the manufacturer.
Fig.14 – Alignment with straight edge and feeler gauge
12.5 Suction Pipe Line - Recommendations
To install the suction piping follow these instructions:
a) Connect the suction piping to the pump only after the complete hardening grout initial base.
b) The suction piping should be as straight and short as possible, saving pressure losses, and totally air tight, preventing
any air leaks.
c) In order to be free of air pockets, the horizontal section of the suction piping, when negative, should be installed with
gradual rise slope. When positive, the horizontal section of the pipeline should be installed with a gradual rise slope to
the suction tank.
d) The nominal diameter of the pump suction flange does not determine the suction pipe nominal diameter. To calculate
the ideal diameter as a reference, the liquid velocity can be defined between 1 and 2 m/s.
e) If it were necessary to use a reduction, it should be eccentric, mounted with its taper looking downwards, so that the
reduction upper generatrix stays in a horizontal position coincident with the pump’s generatrix, so as to prevent air
pockets.
f) Curves and accessories, when needed, should be designed and installed reducing pressure losses at minimum. Ex.:
always prefer long or medium radials curves.
g) The suction line flange should fit to the pump suction flange without any stress or tension without applying any kind of
force to the casing. The pump should never be an anchor point for the suction pipeline. If this condition is not observed,
a misalignment may happen, originating cracked parts or other severe damages.
h) On installations equipped with foot valve, observe that the free passage area should be 1,5 times the cross sectional
area of the suction strainer with a free passage area 3 to 4 times larger than the cross sectional area of the suction
pipeline.

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i) When the liquid being pumped has large temperature variations, expansion joints should be installed preventing the
effects of contractions and expansions of the suction pipeline on the pump.
j) With positive suction, it is advisable to install an inlet valve to close the flow to the pump when necessary. During the
pump operation it should stay totally opened. A suction with a common header for several pumps should have an inlet
valve for each pump and the connection between the header and each suction line should be made with line angle
changes less than 45 degrees. In all these applications of gate valves, the valve stems should be directed either
horizontally or vertically downwards.
k) To prevent turbulence, leakage of air, sand or mud at the pump suction, all recommendations of the HYDRAULIC
INSTITUTE referred to these types of installation should be strictly observed.
l) Even if the coupling alignment has been checked before tightening, it has to be repeated after the final tightening of the
suction pipe line.
m) To facilitate the mounting of the suction pipeline and the fitting of the parts, install, as necessary, flexible joints of the
following types: Dresser, common or special with tie bolts.
Fig.15 – Negative suction
Fig. 16 – Positive suction

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12.6 Discharge Pipeline - recommendations
To install the discharge pipeline follow these instructions:
a) if the overpressures originated in liquid returning on long lines exceed the limits specified for the line and the pump,
water hammer control devices should be installed on the discharge pipe line.
b) When the diameters of the pump and pipeline flanges are different, the connection should be done through a concentric
reduction.
c) On the points where it is necessary to bleed the air in the pipeline, vent valves should be installed.
d) Install a valve, if possible immediately after the discharge nozzle of the pump, so as to control adequately the flow rate
and pressure or prevent driver overloads.
e) When a non-return valve is installed, it should be mounted between the pump and the valve, prevailing this condition
over item d.
f) Tie band mounting joints should be installed to absorb the system reaction forces, originated on the applied loads.
g) Safety valves, pressure relief devices and other operational valves not included up to now, should be installed as
necessary for adequate operation of the pipeline.
h) The recommendations for the suction pipe line described on items a, b, f, g, i, l and m are also valid for the discharge
pipe line.

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12.7 Auxiliary piping and connections
Fig. 17 – Auxiliary piping and connections
Connections Denomination NPT Thread
1M.1 Manometer ½”
1M.2 Manometer ½”
6B Drain ¾”
6D Priming ↑1”
8B Dripping ½”
10E Inlet Ext. Sealing ¼”←
10A Outlet Ext. Sealing ¼”←
13D Lubrication -
13B Drain ½”
NOTES: ←for bearing brackets A50K e A60K = 3/8’
↑6D only for sizes 250-500 e 300-500
Table 8 – Connections
Note:
1) Inlet and outlet piping of external source liquid, should be provided with register and visor, in order to control the flow
and observe the priming.
2) For pumps with Mechanical Seals it is possible to have another connections installed in the gland. In case of supply with
Mechanical seals, additional instructions will follow.
13. Accessories (Optionals)
13.1 Coupling
KSB standard or from other manufacturers with or without spacer.
13.2 Electrical Motor, Turbine, Diesel Motor, etc.
13.3 KSB standard of structural welded steel with under drain channel.