Related Installation And Operating Instructions; Product Introduction; Nk, Nkg Bare-Shaft Pumps; Intended Use - Grundfos NK Serie Instrucciones De Instalación Y Funcionamiento

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.
6
0.57
Type MEI
p
NK 125-250/220 A1-F-K-E-BQQE
98295826 P4 1902 0001
Model
II 2G Ex h IIC T4...T3 Gb
10000238284 X
Tech. file
16/120
p/t bar/ C Made in
MAX
221.8 /h H 13.2
Q 3
m
1
Fig. 1 Nameplate of ATEX-approved NK pump
with single seal
0.51
Type
MEI
p
NKG 100-65-250/238 H2-F-N-E-BQQE
98844481 P4 1902 0001
Model
II 2 Ex h IIIC 125 °C Db
10000238284 X
Tech. file
16/120
p/t bar/ C Made in
MAX
134.4
/h H 68.6 m n 2960
Q 3
m
1
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:
Pos. Description
1 ATEX marking
II Equipment group
2, 3 Equipment category
Environment:
G Gas or vapours
D Combustible dust
Ex Explosion protection
h Type of protection
Environment group:
II C Gas or vapours
IIIC Combustible dust
T4...T3 Maximum surface temperature
according to 80079-36.
Temperature range or specific
T125 °C
temperature.
Gb
EPL
(Equipment Protection Level)
Db
2 Technical file number
100002 Number of technical file stored
38284 at DEKRA.
''X'' indicates that the
equipment is subject to special
X conditions for safe use. The
conditions are mentioned in
this document.
86.6
%
DK-8850 Bjerringbro,Denmark
Hungary
m n 1475 -1
min
2
73.2
%
DK-8850 Bjerringbro,Denmark
Hungary
-1
min
2