Electrical Data - Grundfos NB Installation And Operating Instructions Manual
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Also See for NB:
- Installation and operating instructions manual (240 pages) ,
- Instructions manual (108 pages) ,
- Safety instructions (36 pages)
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13.1.8 Shaft seals
The operating range of the seals is described for two
main applications: Pumping of water or pumping of
coolants.
Seals with a temperature range of 0 °C and up are
mainly used for pumping water, while seals for
temperatures below 0 °C are mainly intended for
coolants.
Shaft seal diameter [mm]
Shaft seal type
Bellows seal, type B,
unbalanced
O-ring seal, type A,
unbalanced
O-ring seal, type D, balanced
13.2 Electrical data
See the motor nameplate.
42
We do not recommend that you operate
the pump at maximum temperature and
maximum pressure at the same time as
the seal life will be reduced and periodic
noise will occur.
Seal
Rubber Code Temperature range
faces
AQ
EPDM BAQE
1
BQ
EPDM BBQE
1
BQ
FKM BBQV
1
Q
Q
EPDM BQQE
-25 to +120 °C
7
7
Q
Q
FKM BQQV
7
7
Q
A
EPDM AQAE
1
Q
A
FKM AQAV
1
Q
Q
EPDM AQQE
1
1
Q
Q
FKM AQQV
1
1
Q
Q
HNBR AQQX
1
1
Q
Q
FFKM AQQK
1
1
AQ
FXM DAQF
1
Q
Q
EPDM DQQE
-20 to +120 °C
6
6
Q
Q
FKM DQQV
6
6
Q
Q
HNBR DQQX
-15 to +120 °C
6
6
Q
Q
FFKM DQQK
6
6
28, 38 48 55 60
Max. pressure
[bar]
0-120 °C
16
16 16 16
0-120 °C
16
16 16 16
0-90 °C
16
16 16 16
16
16 16 16
-10 to +90 °C
16
16 16 16
0-120 °C
16
16 16 16
0-90 °C
16
16 16 16
-25 to +90 °C
16
16 16 16
-10 to +90 °C
16
16 16 16
-15 to +90 °C
16
16 16 16
0-90 °C
16
16 16 16
0-140 °C
25
25 25 25
25
25 25 25
-10 to +90 °C
25
25 25 25
25
25 25 25
0-120 °C
25
25 25 25
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