Grundfos NK Serie Instrucciones De Instalación Y Funcionamiento página 13

Example 1 - (pump design according to EN 733)
Example 2 - (pump design according to ISO 2858)
H EN-GJL-250 bronze CuSn10
K 1.4408 1.4408
L 1.4517 1.4517
M 1.4408 1.4517
N 1.4408 1.4408
P 1.4408 1.4517
R 1.4517 1.4517
S EN-GJL-250 1.4408
X Special version
Rubber parts in pump:
First letter indicates material of pump cover O-ring and seal cover O-ring (seal cover O-ring is
only for double seal arrangements)
Second letter indicates material of seal housing O-ring
E EPDM
®
F FXM (Fluoraz )
®
K FFKM (Kalrez )
M FEPS (PTFE-sheathed silicone O-ring)
X HNBR
®
V FKM (Viton )
Shaft seal arrangement:
S Single seal
O Back-to-back, double seal
P Tandem, double seal
C Cartridge seal, single
D Cartridge seal, double
Shaft seal(s) in pump:
Letter or digit code for mechanical shaft seal and shaft seal rubber parts
4 letters: Single mechanical shaft seal (ex. BQQE) or single cartridge seal (ex. HBQV).
Double seal solution (ex. 2716, where 27 = DQQV (primary seal) and 16 = BQQV (secondary seal))
4 digits:
or double cartridge seal (ex. 5150 = where 51 = HBQV (primary seal) and 50 = HQQV (secondary seal))
The relation between letters and digits of the shaft seals is described in fig. 4.
EN-GJL-250 1.4401/1.4408
1.4517 1.4401/1.4408
1.4517 1.4462
1.4517 1.4401/1.4408
Carbon-graphite filled
1.4401/1.4408
®
PTFE (Graflon )
Carbon-graphite filled
1.4401/1.4408
®
PTFE (Graflon )
Carbon-graphite filled
1.4462
®
PTFE (Graflon )
bronze/brass 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
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