Shaft Seals - Grundfos NK Serie Montage- Und Betriebsanleitung

6.8 haft seals
S
Mechanical 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.
Note: We do not recommend operation at maximum temperature
and maximum pressure at the same time as the seal life will be
reduced and periodical noise will occur.
Shaft seal diameter [mm]
d5 [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
Stuffing box
Stuffing box without cooling, with internal barrier liquid
Stuffing box without cooling, without barrier liquid
Stuffing box without cooling, with external barrier liquid
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
6 6
Q Q FKM DQQV
6 6
Q Q HNBR DQQX
6 6
Q Q FFKM DQQK
6 6
Code
SNE
SNO
SNF
28, 38
24, 32
Temperature
Max. pressure [bar]
range
0-120 °C 16
0-90 °C 16
0-120 °C 16
0-90 °C 16
0-100 °C 16
-25 - +120 °C 16
-10 - +90 °C 16
-25 - +60 °C 16
-10 - +60 °C 16
0-120 °C 16
0-90 °C 16
-25 - +90 °C 16
-10 - +90 °C 16
-15 - +90 °C 16
0-90 °C 16
0-140 °C 25
-20 - +120 °C 25
-10 - +90 °C 25
-15 - +120 °C 25
0-120 °C 25
Temperature range Max. pressure [bar]
-30 - +120 °C
48 55 60
42 48 60
16 16 16
16 16 16
16 16 16
16 16 16
- - -
16 16 16
16 16 16
16 16 16
16 16 16
16 16 16
16 16 16
16 16 16
16 16 16
16 16 16
16 16 16
25 25 25
25 25 25
25 25 25
25 25 25
25 25 25
16
11