Grundfos NB - Pressure Gauge and Mano-Vacuum Gauge Installation; Condensation Cover

11.1.8 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 32 °F (0 °C) and up are mainly
used for pumping water, while seals for temperatures below 32 °F
(0 °C) are mainly intended for coolants.
We do not recommend that you operate the pump at
maximum temperature and maximum pressure at the
same time, as it results in reduced seal life and the
occurrence of periodic noise.
Shaft seal diameter [mm] 20
28,
38
48 55 60
Shaft seal type Seal faces Rubber Code Temperature range Max. pressure [PSI] ([bar])
Bellows seal, type B,
unbalanced
BQ
1
EPDM BBQE
32-248 °F
(0-120 °C)
232
(16)
232
(16)
232
(16)
232
(16)
232
(16)
BQ
1
FKM BBQV
32-194 °F
(0-90 °C)
232
(16)
232
(16)
232
(16)
232
(16)
232
(16)
Q
7
Q
7
EPDM BQQE
-13 to +248 °F
(-25 to +120 °C)
232
(16)
232
(16)
232
(16)
232
(16)
232
(16)
Q
7
Q
7
FKM BQQV
14 to 194 °F
(-10 to +90 °C)
232
(16)
232
(16)
232
(16)
232
(16)
232
(16)
O-ring seal, type D,
balanced
AQ
1
FXM DAQF
32-284 °F
(0-140 °C)
363
(25)
363
(25)
363
(25)
363
(25)
363
(25)
Q
6
Q
6
EPDM DQQE
-4 to +248 °F
(-20 to +120 °C)
363
(25)
363
(25)
363
(25)
363
(25)
363
(25)
11.2 Electrical data
See the motor nameplate.
12. Disposing of the product
This product or parts of it must be disposed of in an environmentally
sound way.
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company or
service workshop.
The crossed-out wheelie bin symbol on
a product means that it must be
disposed of separately from household
waste. When a product marked with
this symbol reaches its end of life, take
it to a collection point designated by
the local waste disposal authorities.
The separate collection and recycling
of such products will help protect the
environment and human health.
See also end-of-life information at www.grundfos.com/product-
recycling.
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