Grundfos NK User manual

NK, NKG
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

NK, NKG
English (GB)
Installation and operating instructions ..................................4
中文 (CN)
安装和使用说明书 ...............................................52
日本語 (JP)
取扱説明書....................................................98
Appendix A..................................................145
3
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ............. 4
1.1 Hazard statements .............. 4
1.2 Notes ..................... 5
2. Product introduction ............ 5
2.1 Product description .............. 5
2.2 Identification.................. 6
3. Receiving the product............15
3.1 Delivery ....................15
3.2 Transporting the product ...........15
3.3 Inspecting the product ............15
3.4 Storage after delivery .............15
4. Installing the product ............16
4.1 Location ....................16
5. Mechanical installation ...........16
5.1 Lifting the product ...............16
5.2 Foundation of horizontally mounted NK,
NKG pumps ..................17
5.3 Alignment of pump and motor ........21
5.4 Pipes .....................27
5.5 Vibration damping...............27
5.6 Expansion joints................28
5.7 Stuffing box piping ..............29
5.8 Bearing bracket ................29
5.9 Bearing monitoring ..............31
5.10 Pressure gauge and mano-vacuum
gauge .....................32
5.11 Ammeter ...................32
5.12 Condensation cover..............32
6. Electrical connection ............32
6.1 Motor protection................33
6.2 Cable entry and screwed connection, MG
motor .....................33
6.3 Synchronous motors .............33
6.4 Frequency converter operation ........34
7. Starting up the product ...........34
7.1 Checking pumps with stuffing box ......34
7.2 Flushing the pipe system ...........34
7.3 Priming ....................35
7.4 Checking the direction of rotation ......36
7.5 Starting up the pump .............36
7.6 Shaft seal run-in period ............36
7.7 Number of motors starting or stopping ....37
7.8 Reference readings of monitoring
equipment ...................37
8. Storing the product .............37
9. Servicing the product ............38
9.1 Contaminated products ............38
9.2 Service kits ..................38
10. Maintaining the product...........38
10.1 Maintenance of the pump...........38
10.2 Lubrication of bearings in bearing bracket..39
10.3 Monitoring equipment.............42
10.4 Maintaining the motor.............42
10.5 Lubrication of motor bearings.........42
10.6 Applying sealant to plugs ...........42
11. Taking the product out of operation ....43
11.1 Protecting the pump during periods of
inactivity and frost...............43
12. Fault finding the product ..........44
13. Technical data ................47
13.1 Operating conditions .............47
13.2 Electrical data .................49
13.3 Sound pressure level .............50
13.4 Belt drive ...................51
13.5 Operation with combustion engine ......51
14. Disposing of the product ..........51
1. General information
Read this document before you install the
product. Installation and operation must
comply with local regulations and accepted
codes of good practice.
1.1 Hazard statements
The symbols and hazard statements below may
appear in Grundfos installation and operating
instructions, safety instructions and service
instructions.
DANGER
Indicates a hazardous situation which, if
not avoided, will result in death or serious
personal injury.
WARNING
Indicates a hazardous situation which, if
not avoided, could result in death or
serious personal injury.
CAUTION
Indicates a hazardous situation which, if
not avoided, could result in minor or
moderate personal injury.
The hazard statements are structured in the following
way:
4
English (GB)

SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
Observe these instructions for explosion-
proof products.
A blue or grey circle with a white graphical
symbol indicates that an action must be
taken.
A red or grey circle with a diagonal bar,
possibly with a black graphical symbol,
indicates that an action must not be taken
or must be stopped.
If these instructions are not observed, it
may result in malfunction or damage to the
equipment.
Tips and advice that make the work easier.
2. Product introduction
2.1 Product description
NK, NKG are non-self-priming, single stage,
centrifugal volute pumps with axial inlet port and
radial outlet port.
NK pumps comply with EN 733.
NKG pumps comply with ISO 2858.
2.1.1 Pumped liquids
NK, NKG pumps are suitable for clean, thin, non-
explosive liquids without solid particles or fibres. The
pumped liquid must not attack the pump materials
chemically.
5
English (GB)

2.2 Identification
2.2.1 Nameplate
Example of NK, NKG nameplate
4
6
H m
n min -1
%
MEI
ηp
(in.)
HzType/Model f DK-8850 Bjerringbro, Denmark
9987276 1
Ver.
Q
p/t
Imp. Dia.
0.70 50
NKGE 200-150-200/218-202AA1F2BESBQQEWW1
B96838797P420430001
16/120
8.58
Made in Hungary
30.9
83.3
2970
m3/h
bar/°CMAX
761.5
1
11
5
3
2
9
78
12 10
WRAS 23C
TM056007
Legend
Pos. Description
1 Type designation
2 Identification code
B Service model
96838797 Product number
P4 Production site code
2015 Production year and week
(YYWW)
0001 Serial number
3 Nominal flow rate
4 Nominal pump head
5 Pressure rating and maximum temperature
6 Hydraulic efficiency at best efficiency point
7 Minimum efficiency index
8 Frequency
9 Actual impeller diameter
10
Drinking water approval
or Pump Energy Index (PEI)
PEICL: constant load
PEIVL: variable load
11 Country of origin
12 Rated pump speed
6
English (GB)

2.2.2 Type key
Example 1: NKGE 125-100-160/160-140BSA1F2AESBAQERW1
Example 2: NKGE 200-150-315.2/317ACA1F3AESDAQFYW4
Example 3: NKG 100-65-200/219SAZ1F2KESBQQEXX4
Example 4: NK 32-125/97AA1F1AESBQQEHX2
Example 5: NK 80-200/222VAXEF1BESBQQEWX2
Pos. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Example 1 NKGE 125 -100 -160 /160-140 B S A1 F 2 A E S BAQE R W 1
Example 2 NKGE 200 -150 -315.2 /317 A C A1 F 3 A E S DAQF Y W 4
Example 3 NKG 100 -65 -200 /219 S A Z1 F 2 K E S BQQE X X 4
Example 4 NK 32 -125 /97 A A1 F 1 A E S BQQE H X 2
Example 5 NK 80 -200 /222 V A XE F 1 B E S BQQE W X 2
Pos. Explanation
1 Type range
2 Nominal diameter of inlet port (DN)
3 Nominal diameter of outlet port (DN)
4 Nominal impeller diameter [mm]
5 Actual impeller diameter [mm]
6
Impeller type
'blank': Closed impeller, cylindrical trim. If one dimension is shown, the impeller has a cylindrical trim,
for example 317
'blank': Closed impeller, conical trim. If two dimensions are shown, the impeller has a conical trim, for
example 160-140
S: Semi-open impeller
V: Super vortex impeller
7
Hydraulic version
A: 1st version
B: 2nd version
C: 3rd version
D: 4th version
8
Sensor version
'blank': Pump without sensor
C: Without built-in sensor, one cable and one pressure sensor are supplied with the pump.
S: Pump with built-in differential-pressure sensor, Series 2000
7
English (GB)

Pos. Explanation
9
Code for pump version; the codes may be combined
A1: Basic version, grease-lubricated standard bearing design, standard coupling
A2: Basic version, grease-lubricated standard bearing design, spacer coupling
B: Oversize motor
(+E): With ATEX approval, certificate or test report, the second character of the pump version code is
an E
G1: Grease-lubricated heavy-duty bearing design, standard coupling
G2: Grease-lubricated heavy-duty bearing design, spacer coupling
H1: Oil-lubricated heavy-duty bearing design, standard coupling
H2: Oil-lubricated heavy-duty bearing design, spacer coupling
I1: Pump without motor, grease-lubricated standard bearing design, standard coupling
I2: Pump without motor, grease-lubricated standard bearing design, spacer coupling
J1: Pump without motor, grease-lubricated heavy-duty bearing design, standard coupling
J2: Pump without motor, grease-lubricated heavy-duty bearing design, spacer coupling
K1: Pump without motor, oil-lubricated heavy-duty bearing design, standard coupling
K2: Pump without motor, oil-lubricated heavy-duty bearing design, spacer coupling
Y1: Bare shaft pump, grease-lubricated standard bearing design
W1: Bare shaft pump, grease-lubricated heavy-duty bearing design
Z1: Bare shaft pump, oil-lubricated heavy-duty bearing design
X: Special version; used in case of further customisation than already listed
10
Pipe connection
E: Table E flange
F: DIN flange
G: ANSI flange
J: JIS flange
11
Flange pressure rating (PN - rated pressure)
1: 10 bar
2: 16 bar
3: 25 bar
4: 40 bar
5: Other pressure rating
8
English (GB)

Pos. Explanation
12
Code for materials
Code Pump housing Impeller Wear ring Shaft
A EN-GJL-250 EN-GJL-200 Bronze/brass 1.4021/1.4034
B EN-GJL-250 Bronze CuSn10 Bronze/brass 1.4021/1.4034
C EN-GJL-250 EN-GJL-200 Bronze/brass 1.4401
D EN-GJL-250 Bronze CuSn10 Bronze/brass 1.4401
E EN-GJL-250 EN-GJL-200 EN-GJL-250 1.4021/1.4034
F EN-GJL-250 Bronze CuSn10 EN-GJL-250 1.4021/1.4034
G EN-GJL-250 EN-GJL-200 EN-GJL-250 1.4401
H EN-GJL-250 Bronze CuSn10 EN-GJL-250 1.4401
I 1.4408 1.4408 1.4517 1.4462
J 1.4408 1.4408 Carbon-graphite-filled
PTFE (Graflon®)1.4462
K 1.4408 1.4408 1.4517 1.4401
L 1.4517 1.4517 1.4517 1.4462
M 1.4408 1.4517 1.4517 1.4401
N 1.4408 1.4408 Carbon-graphite-filled
PTFE (Graflon®)1.4401
P 1.4408 1.4517 Carbon-graphite-filled
PTFE (Graflon®)1.4401
R 1.4517 1.4517 Carbon-graphite-filled
PTFE (Graflon®)1.4462
S EN-GJL-250 1.4408 Bronze/brass 1.4401
T EN-GJL-250 1.4517 Bronze/brass 1.4462
U 1.4408 1.4517 1.4517 1.4462
W 1.4408 1.4517 Carbon-graphite-filled
PTFE (Graflon®)1.4462
Z 1.4469 1.4469 1.4410 1.4410
X Special version
9
English (GB)

Pos. Explanation
13
Rubber parts in pump
E: EE
F: FF
G: FE
H: KE
I: KM
J: KV
K: KK
M: MN
N: ME
O: OO
V: VV
• The first letter indicates material of elastomer between pump housing and cover, and elastomer
between cover and split cover.
• The second letter indicates material of elastomer between split cover and seal housing.
See the material description in the table below.
Code Material description
E EPDM
FFXM (Fluoraz®)
KFFKM (Kalrez®)
M FEPS (PTFE-sheathed silicone O-ring)
O HNBR
VFKM (Viton®)
14
Shaft seal arrangement
B: Stuffing box
C: Cartridge seal, single
D: Cartridge seal, double
O: Back-to-back, double seal
P: Tandem, double seal
S: Single seal
15
Shaft seal(s) in pump
Letter or digit code for mechanical shaft seal and shaft seal rubber parts
• 4 letters: Single mechanical shaft seal, such as BQQE, or single cartridge seal, such as HBQV
• 4 digits:
- double seal solution; example 2716, where 27 is DQQV, primary seal, and 16 is BQQV,
secondary seal;
- double cartridge seal; example 5150, where 51 is HQQU, primary seal, and 50 is HBQV,
secondary seal
The relation between letters and digits of the shaft seals is described in Codes for shaft seals.
16 Code for rated motor power [kW]. See Codes for rated motor power.
17 Code for phase and voltage [V] or other information. See Codes for phase and voltage or other
information.
18 Code for speed variant [rpm]. See Codes for speed variant.
10
English (GB)

Example 1: NKGE
125-100-160/160-140BSA1F2AESBAQERW1 shows
an NKGE 125-100-160 pump with these
characteristics:
• 160-140 mm closed impeller, conical trim
• hydraulic version B
• with built-in differential-pressure sensor
• grease-lubricated standard bearing design
• standard coupling
• DIN flange to EN 1092-2 pipe connection
• 16 bar flange pressure rating
• cast iron pump housing, EN-GJL-250
• cast iron impeller, EN-GJL-200
• bronze/brass wear ring
• stainless steel shaft, EN 1.4021/1.4034
• EPDM O-rings for pump cover and seal cover
• EPDM O-ring for pump cover
• single shaft seal arrangement
• BAQE shaft seal
• 30 kW motor, not for sale in North America, 2-
pole, 50 Hz.
Example
2: NKGE 200-150-315.2/317ACA1F3AESDAQFYW4
shows an NKG 200-150-315.2 pump with these
characteristics:
• 317 mm closed impeller, cylindrical trim
• hydraulic version A
• without built-in sensor, one cable and one
pressure sensor are supplied with the pump.
• grease-lubricated standard bearing design
• standard coupling
• DIN flange to EN 1092-2 pipe connection
• 25 bar flange pressure rating
• cast iron pump housing, EN-GJL-250
• cast iron impeller, EN-GJL-200
• bronze/brass wear ring
• stainless steel shaft, EN 1.4021/1.4034
• EPDM O-rings for pump cover and seal cover
• EPDM O-ring for seal housing
• single shaft seal arrangement
• DAQF shaft seal
• motor size outside DOE scope, not for sale in
North America, 4-pole, 60 Hz..
Example 3: NKG
100-65-200/219SAZ1F2KESBQQEXX4 shows an
NKG 100-65-200 pump with these characteristics:
• 219 mm semi-open impeller
• hydraulic version A
• bare shaft pump, oil-lubricated heavy-duty
bearing design
• DIN flange to EN 1092-2 pipe connection
• 16 bar flange pressure rating
• stainless steel pump housing, EN 1.4408
• stainless steel impeller, EN 1.4408
• stainless steel wear ring, EN 1.4517
• stainless steel shaft, EN 1.4401
• EPDM O-rings for pump cover and seal cover
• EPDM O-ring for seal housing
• single shaft seal arrangement
• BQQE shaft seal
• bare shaft pump without motor, for 4-pole
operation, 60 Hz,.
Example 4: NK 32-125/97AA1F1AESBQQEHX2
shows an NK 32-125 pump with these characteristics:
• 97 mm closed impeller, cylindrical trim
• hydraulic version A
• grease-lubricated standard bearing design
• standard coupling
• DIN flange to EN 1092-2 pipe connection
• 10 bar flange pressure rating
• cast iron pump housing, EN-GJL-250
• cast iron impeller, EN-GJL-200
• bronze/brass wear ring
• stainless steel shaft, EN 1.4021/1.4034
• EPDM O-rings for pump cover and seal cover
• EPDM O-ring for seal housing
• single shaft seal arrangement
• BQQE shaft seal
• 1.5 kW motor, US DOE regulated motor, 2-pole,
60 Hz.
11
English (GB)

Example 5: NK 80-200/222VAXEF1BESBQQEWX2
shows an NK 80-200 pump with these characteristics:
• 222 mm super vortex impeller
• hydraulic version A
• PWIS-free certificate included
• DIN flange to EN 1092-2 pipe connection
• 10 bar flange pressure rating
• cast iron pump housing, EN-GJL-250
• bronze CuSn10 impeller
• bronze/brass wear ring
• stainless steel shaft, EN 1.4021/1.4034
• EPDM O-rings for pump cover and seal cover
• EPDM O-ring for seal housing
• single shaft seal arrangement
• BQQE shaft seal
• 90 kW motor, US DOE regulated motor, 2-pole,
60 Hz..
Codes for shaft seals
The digits are only used for double shaft seal
solutions.
Digits Letters Description
10 BAQE Single mechanical shaft seal
11 BAQV Single mechanical shaft seal
12 BBQE Single mechanical shaft seal
13 BBQV Single mechanical shaft seal
15 BQQE Single mechanical shaft seal
16 BQQV Single mechanical shaft seal
19 AQAE Single mechanical shaft seal
20 AQAV Single mechanical shaft seal
21 AQQE Single mechanical shaft seal
22 AQQV Single mechanical shaft seal
23 AQQX Single mechanical shaft seal
24 AQQK Single mechanical shaft seal
25 DAQF Single mechanical shaft seal
26 DQQE Single mechanical shaft seal
27 DQQV Single mechanical shaft seal
28 DQQX Single mechanical shaft seal
29 DQQK Single mechanical shaft seal
50 HBQV Cartridge seal
51 HQQU Cartridge seal
52 HAQK Cartridge seal
SNEA Stuffing box
SNEB Stuffing box
SNEC Stuffing box
SNED Stuffing box
SNOA Stuffing box
SNOB Stuffing box
SNOC Stuffing box
SNOD Stuffing box
SNFA Stuffing box
SNFB Stuffing box
SNFC Stuffing box
SNFD Stuffing box
12
English (GB)

Letter codes for shaft seals
Code
examp
le
Description Code explanation
B Shaft seal type
A: O-ring seal with fixed
driver
B: Rubber bellows seal
D: O-ring seal, balanced
H: Cartridge seal,
balanced
Q
Material of
rotating seal
face
A: Carbon, metal-
impregnated with
antimony which is not
approved for potable
water
B: Carbon, resin-
impregnated
Q: Silicon carbide
QMaterial of
stationary seal
A: Carbon, metal-
impregnated with
antimony which is not
approved for potable
water
Q: Silicon carbide
E
Material of
secondary seal
and other
rubber and
composite parts,
except the wear
ring
E: EPDM
V: FKM (Viton®)
F: FXM (Fluoraz®)
K: FFKM (Kalrez®)
X: HNBR
U: Dynamic O-rings in
FFKM and static O-rings
in PTFE
For a thorough description of shaft seal types and
materials, see the data booklet "NB, NBG, NK, NKG,
NBE, NBGE, NKE, NKGE - Custom-built pumps
according to EN 733 and ISO 2858".
Letter codes for stuffing boxes
Example: SNEA
Code Description Explanation
SStuffing box
type
S: Packing type stuffing
box
N Cooling method N: Uncooled stuffing box
E Barrier liquid
E: With internal barrier
liquid
F: With external barrier
liquid
O: Without barrier liquid
A Material
A: PTFE-impregnated
fibre packing rings
(Buraflon®) and EPDM
O-rings in the pump
housing
B: Graphite-PTFE
compound packing rings
(Thermoflon®) and
EPDM O-ring in the
pump housing
C: PTFE-impregnated
fibre packing rings
(Buraflon®) and FKM O-
ring in the pump housing
D: Graphite-PTFE
compound packing rings
(Thermoflon®) and FKM
O-ring in the pump
housing
For a thorough description of stuffing boxes and
materials, see the data booklet "NB, NBG, NK, NKG,
NBE, NBGE, NKE, NKGE - Custom-built pumps
according to EN 733 and ISO 2858".
13
English (GB)

Codes for rated motor power
Pos. 16 in NK, NKG type key example.
Code Description
[hp] [kW]
A 0.16 0.12
B 0.25 0.18
C 0.33 0.25
D 0.5 0.37
E 0.75 0.55
F 1 0.75
G 1.5 1.1
H 2 1.5
I 3 2.2
J 4 3
K5 (5.51) 3.7 (41)
L 7.5 5.5
M 10 7.5
N 15 11
O 20 15
P 25 18.5
Q 30 22
R 40 30
S 50 37
T 60 45
U 75 55
V 100 75
W 125 90
XBare shaft
pump
Y> 2002> 1502
1 150 110
2 175 132
3 200 150
421531603
525031853
1 Value in bracket is for the standard IEC motor size.
Value outside bracket is for the motor size according
to NEMA standards.
2 Used for pumps where the pump shaft input power
exceeds 200 hp (150 kW) and is not regulated under
the DOE pump rule.
3 Special cases with power sizes above 200 hp (150
kW) which are still regulated under the DOE pump
rule. For example: Pump has a P2 value of 198 hp
(147.6 kW) in its duty point (in DOE scope) but
customer wants the 215 hp (160 kW) motor instead of
the 200 hp (150 kW). The pump is in scope of the
DOE regulation and requires a PEI value and a motor
code.
14
English (GB)

Codes for phase and voltage or other information
Pos. 17 in NK, NKG type key example.
Code Description
AE-motor (ECM1), 1 x 200-240 V
BE-motor (ECM1), 3 x 200-240 V
CE-motor (ECM1), 3 x 440-480 V
DE-motor (ECM1), 3 x 380-500 V
VIntended for use with external VFD
only, asynchronous motor
W Not for sale in North America
XNo motor or US DOE regulated motor
(CC marked motor)
Y Out of DOE scope
Z E-motor, asynchronous motor
1ECM: Electronically Commutated Motor.
Codes for speed variant
Pos. 18 in NK, NKG type key example.
Code Description
A1450-2200 RPM, E-motor (ECM1)
B2900-4000 RPM, E-motor (ECM1)
C4000-5900 RPM, E-motor (ECM1)
1 2-pole, 50 Hz (Asynchronous motor)
2 2-pole, 60 Hz (Asynchronous motor)
3 4-pole, 50 Hz (Asynchronous motor)
4 4-pole, 60 Hz (Asynchronous motor)
5 6-pole, 50 Hz (Asynchronous motor)
6 6-pole, 60 Hz (Asynchronous motor)
7 8-pole, 50 Hz (Asynchronous motor)
8 8-pole, 60 Hz (Asynchronous motor)
1ECM: Electronically Commutated Motor.
3. Receiving the product
3.1 Delivery
The pumps are tested 100 % before leaving the
factory. The test includes a function test where the
pump performance is measured to ensure that the
pump meets the requirements of relevant standards.
Test certificates are available from Grundfos. After the
installation, the alignment of pump and motor must be
checked again. See section Alignment of pump and
motor.
3.2 Transporting the product
WARNING
Overhead load
Death or serious personal injury
‐Pay attention to the pump weight, and
take precautions to prevent personal
injury if the pump topples or falls by
accident.
• Always transport the pump in the specified
position.
• Securely fasten the pump to prevent damage to
the shaft and shaft seal caused by excessive
vibrations and knocks.
• Do not lift the pump by the shaft.
3.3 Inspecting the product
• Confirm that the product received is in accordance
with the order.
• Confirm that the voltage, phase and frequency of
the product match the voltage, phase and
frequency of the installation site. See
Identification.
• Check the product for defects or damages
immediately upon receipt. Any accessory ordered
will be packed in a separate container and
shipped with the product.
• If any equipment is damaged in transit, report it
immediately to the carrier's agent. Make complete
notations on the freight bill.
3.4 Storage after delivery
The contractor must inspect the equipment on
delivery and make sure it is stored so as to avoid
corrosion or damage. See Storing the product.
15
English (GB)

4. Installing the product
4.1 Location
CAUTION
Hot or cold surface
Minor or moderate personal injury
‐When pumping hot or cold liquids,
make sure that persons cannot
accidentally come into contact with hot
or cold surfaces.
The pump must be sited in a well-ventilated, but frost-
free location.
For inspection and repair, allow suitable clearances
for pump or motor removal.
• Pumps fitted with motors up to and including 4 kW
require a 0.3 m clearance behind the motor.
A
TM053727
Clearance behind the motor
Motor Minimum clearance, A
0.25 - 4 kW 0.3 m
• Pumps fitted with motors of 5.5 kW and up require
a 0.3 m clearance behind the motor and at least a
1 m clearance above the motor to allow the use of
lifting equipment.
B
A
TM077126
Clearance behind and above the motor
Motor Minimum clearance
A B
5.5 kW and up 0.3 m 1 m
5. Mechanical installation
5.1 Lifting the product
Motors from 4 kW and up are supplied with
lifting eyes which must not be used for
lifting the entire pump unit.
• Lift the pumps by means of nylon straps and
shackles.
TM033948
Correct lifting of pump
TM033769
Incorrect lifting of pump
16
English (GB)

5.2 Foundation of horizontally mounted NK,
NKG pumps
We recommend that you install the pump on a plane
and rigid concrete foundation which is heavy enough
to provide permanent support for the entire pump.
The foundation must be capable of absorbing any
vibration, normal strain or shock. As a rule of thumb,
the weight of the concrete foundation should at least
be 1.5 times the weight of the pump.
The foundation must be 100 mm larger than the base
frame on all four sides.
Lf
hf
X
X
Bf
X
X
Lf
TM033771
Foundation, X equal to minimum 100 mm
The minimum height of the foundation, hf, can then
be calculated:
hf=mpump × 1.5
Lf×Bf×δconcrete
hfHeight of the foundation [m]
LfLength of the foundation [m]
BfWidth of the foundation [m]
mpump Mass of the pump [kg]
δconcrete Density of the concrete [kg/m3]
The density, δ, of concrete is usually taken
as 2,200 kg/m3.
Place the pump on the foundation, and fasten it. The
base frame must be supported under its entire area.
TM033950
Correct foundation
TM034324
Incorrect foundation
17
English (GB)

5.2.1 Grouting of horizontally mounted NK, NKG
pumps
For NK, NKG pumps with 2-pole motors equal to or
bigger than 55 kW, grouting of the base frame is
mandatory in order to prevent vibration energy from
the rotating motor and liquid flow to evolve.
Grouting requirements apply to both EN/ISO and C-
channel base frames.
P2 lower than or
equal to 45 kW
P2 equal to or higher
than 55 kW
2-pole Grouting optional Grouting mandatory
4-pole Grouting optional
6-pole Grouting optional
TM034587
EN/ISO base frame with pouring holes
5.2.2 Preparing the foundation
We recommend the following procedures to ensure a
good foundation:
1. Pour the foundation without interruption to 19 to
32 mm of the final level.
Use an approved, non-shrinking concrete. Contact
your concrete supplier for advice if any doubts.
2. Use vibrators to ensure that the concrete is evenly
distributed. The top surface must be well scored
and grooved before the concrete sets. This
provides a bonding surface for the grout.
3. Embed anchor bolts in the concrete.
Allow enough bolt length to reach through grout,
shims, the lower part of the support rail, nuts and
washers.
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10
8
7
65
4
1
2
3
9
TM075514
Pos. Description
1 Bolt length above the support rail
2 Thickness of the support rail
3 19-32 mm allowance for grout
4 Washer
5 Lug
6 Pipe sleeve
7 Foundation with rough top
8 Wedges and shims left in place
9 Support rail
10 5-10 mm
4. Let the foundation cure for several days before
levelling and grouting the support rail.
18
English (GB)

5.2.3 Levelling the base frame
Follow the steps below to level the base frame:
1. Lift or jack up the base frame to the final level
19-32 mm above the concrete foundation, and
support the base frame by means of blocks and
shims both at the anchor bolts and midway
between bolts.
A
TM040488
A: 19-32 mm
2. Level the base frame by adding or removing
shims under the base frame.
TM040489
3. Tighten the anchor bolt nuts against the base
frame.
4. Make sure the piping can be aligned to the pump
flanges without putting strain on pipes or flanges.
5.2.4 Preliminary alignment
DANGER
Electric shock
Death or serious personal injury
‐Before starting work on the pump,
make sure that the power supply has
been switched off and cannot be
accidentally switched on again.
The pump and motor are pre-aligned on the base
frame from the factory. Some deformation of the base
frame may occur during transport and it is therefore
essential to check the alignment at the installation site
before the final grouting.
A flexible coupling will only compensate for minor
misalignments and must not be used to compensate
for excessive misalignment of the pump and motor
shafts. Inaccurate alignment results in vibration and
excessive wear on the bearings, shaft or wear rings.
Carry out alignment of the motor by placing shims of
different thickness under the motor. If possible,
replace several thin shims with one thick shim.
Carry out alignment of the motor only, as
pipe strain will occur if the pump is shifted.
5.2.5 Grouting
If you have questions or doubts about the
grouting, please contact an expert on
grouting.
Grouting compensates for an uneven foundation,
distributes the weight of the unit, dampens vibrations
and prevents shifting. Follow the steps below to do
the grouting:
1. Use an approved, non-shrinking grout.
2. Embed reinforcing steel bars into the foundation
by means of 2K anchor adhesive glue.
19
English (GB)

3. The number of steel bars depends on the size of
the base frame, but we recommend that you
distribute a minimum of 20 bars evenly over the
whole area of the base frame.
TM040491
Example of foundation with minimum 20 bars
4. The free end of the steel bar must be 2/3 the
height of the base frame to ensure a proper
grouting.
2/3 x h h
TM040490
5. Soak top of concrete foundation thoroughly, then
remove surface water.
6. Ensure proper shuttering at both ends of the base
frame.
A
TM034590
A: shuttering
7. If necessary, check the levelling of the base frame
again before grouting.
8. Pour non-shrinking grout through the openings of
the base frame until the space underneath the
base frame has been filled completely.
9. Fill the formwork with grout up to the base frame
top level.
10. Allow the grout to dry thoroughly before attaching
piping to the pump. 24 hours is sufficient time with
approved grouting procedure.
11. When the grout has thoroughly hardened, check
the anchor bolt nuts, and tighten, if necessary.
20
English (GB)