Shaft Seals - Grundfos NB Serie Instrucciones De Instalación Y Funcionamiento

6.8 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
Bellow seal, type B,
unbalanced with reduced seal
faces
O-ring seal, type A,
unbalanced
O-ring seal, type D, balanced
We do not recommend that you operate
the pump at maximum temperature and
Note
maximum pressure at the same time as
the seal life will be reduced and periodic
noise will occur.
Seal
Rubber Code
faces
AQ EPDM BAQE
1
AQ FKM BAQV
1
BQ EPDM BBQE
1
BQ FKM BBQV
1
Q B EPDM BQBE
1
Q Q EPDM BQQE
7 7
Q Q FKM BQQV
7 7
Q Q EPDM GQQE
1 1
Q Q FKM GQQV
1 1
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 - +120 °C
6 6
Q Q FKM DQQV
6 6
Q Q HNBR DQQX -15 - +120 °C
6 6
Q Q FFKM DQQK
6 6
28, 38 48 55 60
Temperature Max. pressure
range [bar]
0-120 °C 16 16 16 16
0-90 °C 16 16 16 16
0-120 °C 16 16 16 16
0-90 °C 16 16 16 16
0-100 °C 16
-25 - +120 °C 16 16 16 16
-10 - +90 °C 16 16 16 16
-25 - +60 °C 16 16 16 16
-10 - +60 °C 16 16 16 16
0-120 °C 16 16 16 16
0-90 °C 16 16 16 16
-25 - +90 °C 16 16 16 16
-10 - +90 °C 16 16 16 16
-15 - +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 - +90 °C 25 25 25 25
25 25 25 25
0-120 °C 25 25 25 25
- - -
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