Grundfos NK Serie Instrucciones De Instalación Y Funcionamiento página 7

4.2 Type key
Model B
Example 1, pump design according to EN 733
Example 2, pump design according to ISO 2858
Type range
Nominal diameter of suction port (DN)
Nominal diameter of discharge port (DN)
Nominal impeller diameter [mm]
Reduced performance: .1
Actual impeller diameter [mm]
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
Pipe connection
E Table E flange
F DIN flange
G ANSI flange
J JIS flange
Flange pressure rating (PN - rated pressure)
1 10 bar
2 16 bar
3 25 bar
4 40 bar
5 Other pressure rating
Materials
Pump housing Impeller
A EN-GJL-250 EN-GJL-200
B EN-GJL-250 Bronze CuSn10 Bronze/brass
C EN-GJL-250 EN-GJL-200
D EN-GJL-250 Bronze CuSn10 Bronze/brass
E EN-GJL-250 EN-GJL-200
F EN-GJL-250 Bronze CuSn10 EN-GJL-250
G EN-GJL-250 EN-GJL-200
H EN-GJL-250 Bronze CuSn10 EN-GJL-250
I 1.4408 1.4408
J 1.4408 1.4408
K 1.4408 1.4408
L 1.4517 1.4517
M 1.4408 1.4517
N 1.4408 1.4408
Wear ring Shaft
Bronze/brass 1.4021/1.4034
1.4021/1.4034
Bronze/brass 1.4401
1.4401
EN-GJL-250 1.4021/1.4034
1.4021/1.4034
EN-GJL-250 1.4401
1.4401
1.4517 1.4462
Carbon-graphite-filled
1.4462
®
PTFE (Graflon )
1.4517 1.4401
1.4517 1.4462
1.4517 1.4401
Carbon-graphite-filled
1.4401
®
PTFE (Graflon )
NK 32 -125 .1 /142
NKG 200 -150 -200 /210-170 H2 F 3 N KE O 2926
A1 F 1 A E S BAQE
7