Grundfos NK Series User manual

NK, NKG
ATEX-approved pumps
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
Other languages
http://net.grundfos.com/qr/i/96528412

2

3
Table of contents
NK, NKG
English (GB)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
 (BG)
   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
eština (CZ)
Montážní a provozní návod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Deutsch (DE)
Montage- und Betriebsanleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Dansk (DK)
Monterings- og driftsinstruktion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Eesti (EE)
Paigaldus- ja kasutusjuhend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Español (ES)
Instrucciones de instalación y funcionamiento . . . . . . . . . . . . . . . . . . . . . . . . . 71
Suomi (FI)
Asennus- ja käyttöohjeet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Français (FR)
Notice d'installation et de fonctionnement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
 (GR)
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Hrvatski (HR)
Montažne i pogonske upute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Magyar (HU)
Telepítési és üzemeltetési utasítás. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Italiano (IT)
Istruzioni di installazione e funzionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Lietuviškai (LT)
rengimo ir naudojimo instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Latviešu (LV)
Uzstdšanas un ekspluatcijas instrukcija. . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Nederlands (NL)
Installatie- en bedieningsinstructies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Polski (PL)
Instrukcja montau i eksploatacji . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Português (PT)
Instruções de instalação e funcionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Table of contents
4
NK, NKG
Român(RO)
Instruciuni de instalare i utilizare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Srpski (RS)
Uputstvo za instalaciju i rad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
 (RU)
    . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Svenska (SE)
Monterings- och driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Slovensko (SI)
Navodila za montažo in obratovanje. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Slovenina (SK)
Návod na montáž a prevádzku . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Türkçe (TR)
Montaj ve kullanım kılavuzu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
 (UA)
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
 (KZ)
   . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
(AR)
   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321

English (GB)
5
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions
describe ATEX-approved Grundfos NK, NKG pumps
and NK, NKG bare-shaft pumps.
Sections 1-5 provide important information about the
product, information necessary to be able to unpack,
install and start up the product in a safe way.
Sections 6-8 provide important information on
service, fault finding and disposal of the product.
CONTENTS
Page
1. General information
These supplementary installation and operating
instructions apply to ATEX-approved Grundfos NK,
NKG pumps and NK, NKG bare-shaft pumps. The
pumps comply with ATEX Directive 2014/34/EU.
1.1 Symbols used in this document
The text accompanying the three hazard symbols
DANGER, WARNING and CAUTION is structured in
the following way:
1. General information 5
1.1 Symbols used in this document 5
1.2 Related installation and operating
instructions 6
2. Product introduction 6
2.1 NK, NKG bare-shaft pumps 6
2.2 Intended use 6
2.3 Pumped liquids 6
2.4 Explosion protection documentation 6
2.5 Identification 6
2.6 ATEX approvals 7
3. Installation requirements 8
3.1 Location 8
3.2 Bypass with pressure relief valve 8
4. Electrical connection 8
4.1 Earthing the pump housing 8
5. Starting up the product 9
5.1 Before starting an ATEX-approved pump 9
5.2 Monitoring, circulating liquid and
ventilation 10
5.3 Barrier or flushing liquid 12
5.4 Liquid connections of dead-end solutions 12
5.5 Circulating solution 12
5.6 Vacuum operation or suction lift 12
5.7 Checking the direction of rotation 13
5.8 Monitoring of bearing condition 13
6. Servicing the product 14
7. Technical data 14
7.1 Operating conditions 14
8. Disposing of the product 15
Read this document before you install the
product. Installation and operation must
comply with local regulations and accepted
codes of good practice.
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.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.
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.

English (GB)
6
1.2 Related installation and operating
instructions
In addition to these instructions, the following
installation and operating instructions must be
observed:
•NK,NKG
product number 96646512.
For special versions of the pumps, observe the
relevant installation and operating instructions:
• NKG - Double seal (back-to-back)
product number 97527932
• NKG - Double seal (tandem)
product number 97527931.
2. Product introduction
2.1 NK, NKG bare-shaft pumps
ATEX-approved NK, NKG bare-shaft pumps are
supplied with an ATEX marking similar to that of the
ATEX-approved NK, NKG pump. See section
2.5 Identification.
Installation and operating instructions mentioned in
section 1.2 also apply to ATEX-approved NK, NKG
bare-shaft pumps.
2.2 Intended use
The pumps are suitable for use in areas or zones
classified according to Directive 2014/34/EU. In case
of doubt, consult the above-mentioned directives, or
contact Grundfos.
The pumps must only be operated within the
specification given in the ´"key application data
sheet".
2.3 Pumped liquids
The pumps are suitable for thin, clean liquids, not
containing solid particles or fibres.
2.4 Explosion protection documentation
The combination of an NK, NKG pump and all
monitoring equipment must be described in the
explosion protection document according to
Directive 2014/34/EU. The responsibility rests with
the installer or owner.
2.5 Identification
2.5.1 Nameplate
The nameplate on the pump head gives the following
details:
• data for the standard pump
• data for the ATEX marking, pos. 1 and 2.
Fig. 1 Nameplate of ATEX-approved NK pump
with single seal
Fig. 2 Nameplate of ATEX-approved NKG
pump with single seal
Data for the ATEX marking only refers to the pump
part including the coupling. The motor has a
separate nameplate.
ATEX-related positions on the pump nameplate:
TM07 4906 2719TM07 4907 2719
Pos. Description
1 ATEX marking
II Equipment group
2, 3 Equipment category
G
D
Environment:
Gas or vapours
Combustible dust
Ex Explosion protection
h Type of protection
II C
IIIC
Environment group:
Gas or vapours
Combustible dust
T4...T3 Maximum surface temperature
according to 80079-36.
Temperature range or specific
temperature.
T125 °C
Gb EPL
(Equipment Protection Level)
Db
2 Technical file number
100002
38284
Number of technical file stored
at DEKRA.
X
''X'' indicates that the
equipment is subject to special
conditions for safe use. The
conditions are mentioned in
this document.
Type MEI Șp%DK-8850 Bjerringbro,Denmark
Model
Tech. file
min-1
p/t
Q
0.57 86.6
NK 125-250/220 A1-F-K-E-BQQE
98295826 P4 1902 0001
II 2G Ex h IIC T4…T3 Gb
10000238284 X
Hungary
16/120
221.8
bar/CMAXMade in
m
3
/hH13.2
mn
1475
12
Type MEI Șp%DK-8850 Bjerringbro,Denmark
Model
Tech. file
min-1
p/t
Q
0.51 73.2
NKG 100-65-250/238 H2-F-N-E-BQQE
98844481 P4 1902 0001
II 2'Ex h IIIC 7125 °C Db
10000238284 X
Hungary
16/120
134.4
bar/CMAXMade in
m
3
/hH68.6mn
2960
12

English (GB)
7
2.6 ATEX approvals
2.6.1 Scope of ATEX categories for NK, NKG pumps
The link between groups, categories and zones is
explained in Directive 2014/34/EU. Please note that
this is a minimum directive. Some EU countries
might therefore have stricter local rules. The user or
installer is always responsible for checking that the
group and category of the pump correspond to the
zone classification of the installation site.
Directive ATEX-approved NK, NKG pumps
2014/34/EU
Equipment group I II
Equipment category M 1 2 3
Environment 1 2 G D G D G D
EPL
(Equipment
Protection Level)
Ma Mb Ga Da Gb Db Gc Dc
1999/92/EC Zone 0 20 1 21 2 22
Pumps None NK, NKG
Motors None
II 2G Ex eb IIC T3 Gb II 2G Ex db IIC T4 Gb II 2G Ex db eb IIC T4 Gb II 2D Ex tb IIIC T125 °C Db II 3G Ex ec IIC T3 Gc II 3D Ex tc IIIC T125 °C Dc

English (GB)
8
3. Installation requirements
3.1 Location
3.1.1 Installation position
Fig. 3 Horizontal installation of the products
3.1.2 Pit installation
3.2 Bypass with pressure relief valve
Observe the minimum flow rate. See section
1.2 Related installation and operating instructions.
4. Electrical connection
4.1 Earthing the pump housing
Fig. 4 Earthing point of the pump housing
Torque: 80 ± 16 Nm.
TM04 0488 0708TM04 0489 0708
WARNING
Accumulation of explosive gases from
shaft seal leakage
Death or serious personal injury
- Provide adequate ventilation if the
pump is installed in a pit. A minimum air
exchange of 1.5 times per hour is
required.
CAUTION
Overheating
Minor or moderate personal injury
- The pump must not run against a closed
outlet valve or a closed shut-off element
as this may cause overheating. Install a
bypass with a pressure relief valve.
DANGER
Electric shock
Death or serious personal injury
- The pump housing must be earthed.
DANGER
Ignition of explosive environment
Death or serious personal injury
- The pump housing must be earthed.
Remove coating from the earthing point to
ensure proper grounding connection.
TM05 2026 4311

English (GB)
9
5. Starting up the product
5.1 Before starting an ATEX-approved
pump
1. Compare the order with the supplied pump and
motor. Check that the EPL (Equipment Protection
Level) of the pump and motor corresponds to
what is ordered. If the EPL of the motor and
pump differs from each other or the temperature
class of the motor differs from that of the pump,
the following applies:
– The EPL which defines the lower protection
level applies. Example: The EPL of the motor
is Gc and the pump’s is Gb. Gc applies.
– The temperature class which defines the
higher temperature applies.
Example 1: Motor temperature class is T4 (135
°C), and pump temperature class is T3 (200
°C). T3 (200 °C) applies.
Example 2: Motor temperature class is T3 (200
°C), and pump temperature class is T4...T3.
T3 (200 °C) applies.
2. Check that the pumped liquid and its operating
temperatures are in accordance with what is
stated on the "key application data sheet".
3. Check that the shaft seal and rubber parts of the
pump are as ordered. See the nameplate.
Fig. 5 Example of codes for rubber parts and
shaft seal
The key to the nameplate is shown in the installation
and operating instructions for the standard pump.
4. Check that the maximum speed on the pump
nameplate corresponds to the speed of the motor
and that the pump will not be used for operation
with a frequency higher than 60 Hz.
5. Check alignment of the pump and motor. Follow
the procedure in the standard instructions.
6. For the oil-filled bearing bracket, check that oil is
filled to the correct level. Do not use another
lubricant than specified. See section 1.2 Related
installation and operating instructions.
7. For bearing brackets with grease nipples, check
that grease can be pumped into the bearing. Do
not use another lubricant than specified. The re-
greasing nipple could be defective, or the re-
greasing channel may be blocked.
8. Check that the pump and/or auxiliary units have
been filled with liquid and vented.
9. Check that the shaft can rotate freely.
There must be no mechanical contact between
the impeller and the pump housing.
10. Check the direction of rotation. The correct
direction of rotation is shown by an arrow on the
pump housing.
11. Follow the special startup procedures for pumps
with double seal (back-to-back or tandem).
See the installation and operating instructions for
the pump in question.
12. If a pump with double seal (back-to-back) has
been chosen, check that the seal chamber is
correctly pressurised.
13. Before start and during operation, make sure that
the pump does not leak or have any
malfunctions.
14. The pump must be re-vented in these cases:
– The pump has been stopped for a period of
time.
– Air or gas has accumulated in the pump.
WARNING
Dry running
Death or serious personal injury
- Make sure that the pump is filled with
pumped liquid during operation.
Strictly observe the following check list.
TM04 7160 1710
NKG 125-100-160 /160-142 H2 F 2 A KE O 2926

English (GB)
10
5.2 Monitoring, circulating liquid and ventilation
1) Pressureless: The pumped liquid will continuously leak into the auxiliary system liquid, the maximum
leakage is 1.5 ml per hour, and may fill the auxiliary system.
2) Pressurised: The barrier liquid will continuously leak into the pumped liquid, the maximum leakage is 1.5 ml
per hour. The liquids must be compatible.
3) Circulating: circulating liquid.
A temperature increase of 7-10 K across the shaft seal chamber and a maximum outlet temperature of 70
°C must be maintained. This ensures correct function of the shaft seals.
If circulation is lost, the temperature of the barrier or flushing liquid will increase.
4) See the table below for text code descriptions.
Shaft seal
arrangement Type of unit Solution Type of pumped
liquid EPL Text
code4)
Single shaft
seal Pump unit
Non-flammable Gc/Dc 1, 10
Gb/Db 2, 10
Flammable Gc/Dc 2, 11
Gb/Db 2, 11
Double shaft
seal
Pump unit
Non-flammable Gc/Dc 1, 10
Gb/Db 2, 10
Flammable Gc/Dc 2, 11
Gb/Db 2, 11
Auxiliary unit
Dead-end
Pressureless1)
Non-flammable Gc/Dc 3, 10
Gb/Db 3, 10
Flammable Gc/Dc 3, 10
Gb/Db 4, 11
Pressurised2)
Non-flammable Gc/Dc 5, 10
Gb/Db 6, 10
Flammable Gc/Dc 5, 11
Gb/Db 6, 11
Circulating3)
Pressureless1)
Non-flammable Gc/Dc 3, 7, 10
Gb/Db 3, 7, 10
Flammable Gc/Dc 4, 8, 11
Gb/Db 4, 8, 11
Pressurised2)
Non-flammable Gc/Dc 5, 7, 10
Gb/Db 6, 8, 10
Flammable Gc/Dc 5, 7, 11
Gb/Db 6, 8, 11

English (GB)
11
Text
code Description
Monitoring
1 No additional monitoring, for example dry-running protection, is required for the pump system.
2If the operator cannot ensure that the pump is filled with pumped liquid during operation, appropriate
monitoring, for instance dry-running protection, is required to stop the pump in case of malfunction.
3 No additional monitoring, for example dry-running protection, is required for the auxiliary unit.
4
If the operator cannot ensure that the auxiliary unit is filled with barrier or flushing liquid during
operation, appropriate monitoring, for instance a level switch, is required to give an alarm in case of
malfunction.
5 In case of a drop in barrier liquid pressure, a warning must be given. Check the system and remedy.
6In case of a drop in barrier liquid pressure, an alarm must be given, and the system must shut down if
the barrier liquid pressure is not brought back to the correct pressure level.
Circulating liquid
7If circulation of the barrier or flushing liquid is lost, a warning must be given. Check the system and
remedy.
8If circulation of the barrier or flushing liquid is lost, an alarm must be given. Check the system and
remedy. The system must shut down if the circulation cannot be re-established during operation.
Ventilation
10 Ventilation around the pump is not required.
11 The leakage rate of a normally working shaft seal is less than 36 ml for each 24 hours of operation.
Ventilation around the pump is required. The minimum air exchange is 1.5 times per hour.
CAUTION
Flammable material
Minor or moderate personal injury
- The responsibility for checking the
functions of the dry-running protection,
such as flow rate, sealing pressure and
temperature of the barrier or flushing
liquid, rests with the installer or owner.

English (GB)
12
5.3 Barrier or flushing liquid
Barrier or flushing liquid must have an auto-ignition
temperature which is at least 50 K higher than the
maximum surface temperature of the pump.
5.4 Liquid connections of dead-end
solutions
Fig. 6 Examples of double seal arrangements
with dead-end solutions
Fig. 7 Pipe connections
5.5 Circulating solution
Fig. 8 Example of circulating solution
Important operating parameter for the circulating
solution:
At all times, the maximum discharge temperature
from the seal chamber must be kept below 70 °C,
and optimally maximum 60 °C.
Delta T across the seal chamber is adjusted and set
between 7 and maximum 10 K.
5.6 Vacuum operation or suction lift
Fig. 9 Pumps with double seal arrangements
connected to an elevated vessel
If vacuum operation or suction lift is a continuous or
periodic operating condition for the applications
shown in fig. 9, use appropriate level monitoring
equipment to ensure liquid in the seal chamber. The
pump must be stopped if the liquid reaches a
specified low level in the supply vessel.
TM04 4189 1209 TM04 4333 1209
For the examples in fig. 6, the liquid must
be connected to pipe connection number 2
in fig. 7. Pipe connections 1 and 3 must be
plugged. See fig. 7.
TM04 9576 4610
Pressureless
dead-end liquid
Pressurised
dead-end liquid
2
1
3
TM04 4176 1209
TM04 4176 1209 TM04 4189 1009

English (GB)
13
5.7 Checking the direction of rotation
5.8 Monitoring of bearing condition
For EPL Gb/Db and Gc/Dc, bearing condition
monitoring is basically not needed as failure of the
bearings is considered a rare malfunction. However,
local regulations may call for stricter measures with
continuous monitoring of the bearing condition.
5.8.1 SPM nipples
For bearing brackets with grease nipples or
constant-level oiler, SPM nipples are an option for
vibration measurement. Through regular shock-pulse
measurement, the development of incipient damage
can be monitored.
The measuring point is located in the load zone of
the bearing.
Fig. 10 SPM fitting in the bearing bracket
To monitor the bearing condition, the initial vibration
level, dBi (decibel initial), must be measured. It
constitutes the starting point of the condition scale
for a particular bearing.
If the vibration level develops faster than it did in the
first two to three months of operation, renew the
bearings.
If the vibration level develops fast, also observe for
other operating conditions which could cause
increased vibration levels.
5.8.2 Mounting of sensors or transmitters
Bearing brackets with grease nipples or constant-
level oiler are optionally supplied with pre-machined
tappings prepared for temperature sensors or
transmitters.
Thus, it becomes possible to continuously measure
the temperature development of the bearings.
Fig. 11 Optional tappings prepared for fitting of
temperature sensors or transmitters
The alarm level is the maximum surface temperature
detected by the bearing temperature sensor. The
temperature alarm level is set 65 K above ambient
temperature, but must be lower than the temperature
classification for the area. Logging interval must be
set to every 10th sec.
If the alarm level is reached, the system must be
stopped. The protection system must lock the pump
till it is manually restarted.
Never check the direction of rotation by
starting the pump, not even for a short
period, unless the pump and auxiliary unit
have been filled with liquid. This is to
prevent temperature rises resulting from
contact between rotating and stationary
components, and to protect the shaft seal
against dry running.
GrA8476
TM07 4995 2719
Tappings for sensors

English (GB)
14
6. Servicing the product
Service on the pump end can be made on site. The
pump end does not need to be shipped to an
approved ATEX workshop.
1. Check on a daily basis that the shaft seal and
auxiliary units function correctly.
2. Check for oil leakage around the bearing shaft
daily. If there is any oil spillage on the shaft
packings, it may be due to one of the following
reasons:
– The bearing bracket is overfilled.
– The breathing hole in the filling plug is blocked.
– The shaft packing is defective.
3. Check the lubricant and bearing noise each
week. If the bearings begin to show signs of
wear, they must be replaced. Under optimum
operating conditions, the operating life of the
bearings can reach its designed life. After that
period, we recommend replacing the bearings.
4. Check coupling rubber parts every four weeks. If
they begin to show signs of wear, they must be
replaced, and alignment of the pump must be
checked.
5. Inspect O-rings for cracks, elasticity, and
permanent change of shape when doing periodic
maintenance or servicing the pump. Replace if
necessary.
6. It is the responsibility of the customer to do the
following:
– Decide whether to use the non-sparking tools
or to shut down the system for service.
– Lay down a cleaning scheme for pump
surfaces when you install it in a combustible
dust environment.
7. When cleaning a pump located in a combustible
dust environment, remember to take the shaft
guard and coupling guard off, and clean these
cavities.
8. Any standby pump installed must be switched on
once a week to keep it operational.
9. The pressurising or flushing system must be
thoroughly cleaned once a year. Read the
manufacturer’s instructions for the auxiliary unit.
Take the pump out of operation for this purpose.
10. Torques for all fasteners can be found in the
service instructions for NK, NKG pumps.
7. Technical data
7.1 Operating conditions
7.1.1 Liquid temperature
The maximum liquid temperature depends on the
temperature class specified by the customer and the
shaft seal.
The illustration below shows the maximum surface
temperature of the pump as a result of maximum
liquid temperature and temperature rise in the shaft
seal.
Fig. 12 Calculation of maximum surface
temperature
The maximum surface temperature of the pump must
be at least 5 °C lower than the maximum surface
temperature of the temperature class specified by
the customer.
The maximum liquid temperature and the
temperature class specified by the customer are
stated on the "key application data sheet" supplied
with the pump. See the example at the end of this
document.
Strictly observe the following check list.
It may be overruled by stricter local
maintenance schedules.
Temperature class
Maximum surface
temperature
[°C]
T1 450
T2 300
T3 200
T4 135
T5 100
T6 85
TM04 0062 4907
Maximum surface
temperature of the
pump
Temperature rise in
the shaft seal
(determined by
Grundfos)
Maximum liquid
temperature
T [°C]

English (GB)
15
A copy is filed by Grundfos and can be traced by
means of the product number and serial numbers on
the pump nameplate.
Fig. 13 Model, product number, production site,
year, week, and serial number
7.1.2 Ambient temperature
The ambient temperature range in operation is
-20 to +60 °C for the pump-end.
8. Disposing of the product
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
The crossed-out wheelie bin symbol on
a product means that it must be
disposed of separately from household
waste. When a product marked with this
symbol reaches its end of life, take it to a
collection point designated by the local
waste disposal authorities. The separate collection
and recycling of such products will help protect the
environment and human health.
TM06 7167 3016
Do not exceed the maximum liquid
temperature or pump another type of liquid
than specified on the "key application data
sheet" supplied with the pump. Damage
resulting from disregarding this warning
will not be covered by the Grundfos
warranty.
If the "key application data sheet" is
missing, contact Grundfos for information
about the maximum liquid temperature.
If the pump is to be operated at a higher
liquid temperature or with another liquid
than the one stated on the data sheet,
contact Grundfos.
Model B 96689648 P2 07 02 0001

 (BG)
16
 (BG)    
    
    
    ATEX
  Grundfos  NK, NKG  NK,
NKG   .
 1-5    
,    ,
      
.
 6-8    
 ,  
   .

.
1.  
     
     
ATEX   Grundfos  NK, NKG 
NK, NKG   .   
ATEX  2014/34/E.
1.1   
,     
"", "" 
"",     
:
1.   16
1.1    16
1.2     
 17
2.    17
2.1  NK, NKG    17
2.2    17
2.3   17
2.4    17
2.5  17
2.6 ATEX  18
3.    19
3.1  19
3.2    
   19
4.   19
4.1     19
5.    20
5.1    ATEX-
  20
5.2 ,   
 21
5.3     23
5.4     
  23
5.5   23
5.6     
 23
5.7      24
5.8    24
6.     25
7.   25
7.1   25
8.    26
  , 
  .  
    
   
   
.

  , 
      
.

  , 
      
.

  , 
      
.
 
  
   
.
-   
.
      
,    
    
.
    
,   
, ,  
     
   .
    
     
 .
 ,  
.

 (BG)
17
1.2     

   ,  
       
:
•NK,NKG
   96646512.
       
    
:
•NKG-  (  )
   97527932
•NKG-  (tandem)
   97527931.
2.   
2.1  NK, NKG   
ATEX-  NK, NKG 
    ATEX ,
    ATEX-
 NK, NKG. .  2.5 Идентификация.
   ,
  1.2,    
-  NK, NKG 
 .
2.2   
      
,    2014/34/.
    -
    Grundfos.
      
,  " 
 ".
2.3  
     
 ,    
  .
2.4   
   NK, NKG 
     
   
  2014/34/.  
   .
2.5 
2.5.1  
     
   :
•   
•  ATEX , . 1 2.
. 1    -
  NK 

. 2    -
  NKG 
 
      
  , 
.     
.
     ,
    :
TM07 4906 2719TM07 4907 2719
.
1ATEX
II  
2, 3  
G
D
 :
  
 
Ex   
h 
II C
IIIC
  :
  
 
T4...T3  
  80079-36.
   
 .
T125 °C
Gb EPL
(   
)
Db
2   
1000023828
4   ,
 DEKRA.
X
"X" ,   
   
 . 
   .
Type MEI Șp%DK-8850 Bjerringbro,Denmark
Model
Tech. file
min-1
p/t
Q
0.57 86.6
NK 125-250/220 A1-F-K-E-BQQE
98295826 P4 1902 0001
II 2G Ex h IIC T4…T3 Gb
10000238284 X
Hungary
16/120
221.8
bar/CMAXMade in
m
3
/hH13.2
mn
1475
12
Type MEI Șp%DK-8850 Bjerringbro,Denmark
Model
Tech. file
min-1
p/t
Q
0.51 73.2
NKG 100-65-250/238 H2-F-N-E-BQQE
98844481 P4 1902 0001
II 2'Ex h IIIC 7125 °C Db
10000238284 X
Hungary
16/120
134.4
bar/CMAXMade in
m
3
/hH68.6mn
2960
12

 (BG)
18
2.6 ATEX 
2.6.1   ATEX    NK, NKG
  ,   
  2014/34/. , 
,     . 
       -
  .  
     
    
    
  .
 -  NK, NKG
2014/34/
  III

 M123
  1 2GDGDGD
EPL
(   
)
Ma Mb Ga Da Gb Db Gc Dc
1999/92/EC  020121222
  NK, NKG
 
II 2G Ex eb IIC T3 Gb II 2G Ex db IIC T4 Gb II 2G Ex db eb IIC T4 Gb II 2D Ex tb IIIC T125 °C Db II 3G Ex ec IIC T3 Gc II 3D Ex tc IIIC T125 °C Dc

 (BG)
19
3.   
3.1 
3.1.1  
. 3    
3.1.2  
3.2    
  
    . .
 1.2 Сродни инструкции за монтаж и
експлоатация.
4.  
4.1    
. 4     

 : 80 ± 16 Nm.
TM04 0488 0708TM04 0489 0708

   
     
   
-  ,
    .
    
 1,5   .


      

-     
    
  , 
    .
  
   
.

 
   
-    
.

  
 
   
-    
.
    
,    
  .
TM05 2026 4311

 (BG)
20
5.   
5.1    ATEX-
 
1.     
.   EPL ( 
  )   
   . 
EPL      
     
    ,  :
–  EPL,   - 
 . : EPL   Gc,
  Gb.  Gc.
–   ,  
- .
 1:   
 T4 (135 °C), 
   T3 (200 °C).  T3 (200
°C).
 2:   
 T3 (200 °C), 
   T4...T3.  T3 (200 °C).
2.     
    
 "  
".
3.      
     
.   .
. 5      
  
     
    
 .
4.     
     
  ,   
       
60 Hz.
5.     .
  
.
6.     
   
   .  
    .
.  1.2 Сродни инструкции за монтаж
иексплоатация.
7.     
       
.    
  .  
        
.
8.    
    
.
9.      .
      
   .
10.    . 
     
   .
11.      
   (  
 tandem).
    
  .
12.     
(  ),   
   .
13.        ,
     
.
14.       
 :
–      
 .
–      .

  
   
- ,    
     .
  
  .
TM04 7160 1710
NKG 125-100-160 /160-142 H2 F 2 A KE O 2926