Grundfos NK Montage- Und Betriebsanleitung Seite 12

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
With ATEX approval, certificate or test report (in case of ATEX-approved
E
pumps, the second character of the code for pump version 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, with grease-lubricated standard bearing design, standard coupling
I2 Pump without motor, with grease-lubricated standard bearing design, spacer coupling
J1 Pump without motor, with grease-lubricated heavy-duty bearing design, standard coupling
J2 Pump without motor, with grease-lubricated heavy-duty bearing design, spacer coupling
K1 Pump without motor, with oil-lubricated heavy-duty bearing design, standard coupling
K2 Pump without motor, with oil-lubricated heavy-duty bearing design, spacer coupling
Y Bare shaft pump, with grease-lubricated standard bearing design
W Bare shaft pump, with grease-lubricated heavy-duty bearing design
Z Bare shaft pump, with oil-lubricated heavy-duty bearing design
X Special version (if further customization than already listed)
Pipework connection:
E Table E flange to AS 2129
F DIN flange to EN 1092-2
Flange pressure rating (PN - nominal 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
C EN-GJL-250 EN-GJL-200
D EN-GJL-250 bronze CuSn10
E EN-GJL-250 EN-GJL-200
F EN-GJL-250 bronze CuSn10
G EN-GJL-250 EN-GJL-200
12
Wear ring Shaft
bronze/brass 1.4021/1.4034
bronze/brass 1.4021/1.4034
bronze/brass 1.4401/1.4408
bronze/brass 1.4401/1.4408
EN-GJL-250 1.4021/1.4034
EN-GJL-250 1.4021/1.4034
EN-GJL-250 1.4401/1.4408
NK 32 -125 .1 /142
NKG 125 -100 -160 /160-142 H2 F 3 N KE O 2926
A1 F 1 A E S BAQE