Grundfos CRN 95 - Operating Range of the Shaft Seal

Operating and inlet pressures
CR, CRN 95-155
3
12
Operating range of the shaft seal
All pumps will be delivered with a HQQE/V cartridge
shaft seal as standard.
The operating range of the shaft seal depends on
operating pressure, pump type, type of shaft seal and
liquid temperature. The range shown in figs 5 and 6
applies to clean water and water with anti-freeze
liquids. For selection of the right shaft seal, see List of
pumped liquids, page 31. If the operating range is
exceeded, the life of the shaft seal may be reduced.
CR, CRN 95-155
Shaft seals for ∅22 mm shafts (15 to 75 Hp (55 kW))
Fig. 5 Operating range of standard shaft seals for CR,
CRN 95-155
Shaft seals for ∅28 mm (100-150 Hp (75-110 kW))
and ∅36 mm (200-300 Hp (132-200 kW)) shaft ends
Fig. 6 Operating range of standard shaft seals for ∅28
mm shaft ends (100-150 Hp (75-110 kW)) and ∅36
mm shaft ends (200-300 Hp) 132-200 kW))
TM07 0324 4917
Standard
shaft seal
Motor size
[Hp (kW)]
Description
Liquid
temperature
[°F (°C)]
HQQE
15-75
(11-55)
O-ring (cartridge) (balanced
seal), Silicon carbide/Silicon
carbide, EPDM
-40 - +248
(-40 - +120)
HQQV
O-ring (cartridge) (balanced
seal), Silicon carbide/Silicon
carbide, FKM
-4 - +194
(-20 - +90)
HQBE
O-ring (cartridge) (balanced
seal), Silicon
carbide/carbon, EPDM
32 - +248
(0 - +120)
HQBV
O-ring (cartridge) (balanced
seal), Silicon
carbide/carbon, FKM
32 - +194
(0 - +90)
-40 -4 32 68 248 284104 140 176 212
0
145
290
435
580
725
HQQE/V
HQBE/V
HQQE/V
HQQE
HQBE
HQQE
(50)
(40)
(30)
(10)
(20)
(-40)(-20) (0) (20) (40) (60) (80) (100)(120)(140)
p [psi (bar)]
t
[°F (°C)]
TM07 0325 4917
Standard
shaft seal
Motor
size
[Hp (kW)]
Description
Liquid
temperature
[°F (°C)]
HQQE
100-300
(75-200)
O-ring (cartridge) (balanced
seal), Silicon carbide/Silicon
carbide, EPDM
-40 - +248
(-40 - +120)
HQQV
O-ring (cartridge) (balanced
seal), Silicon carbide/Silicon
carbide, FKM
-4 - +194
(-20 - +90)
HQBE
O-ring (cartridge) (balanced
seal), Silicon carbide/carbon,
EPDM
32 - +248
(0 - +120)
HQBV
O-ring (cartridge) (balanced
seal), Silicon carbide/carbon,
FKM
32 - +194
(0 - +90)
0
HQQE/V
HQBE/V
HQQE/V
HQQE
HQBE
HQQE
145
290
435
580
725 (50)
(40)
(30)
(10)
(20)
-40 -4 32 68 248 284104 140 176 212
(-40)(-20) (0) (20) (40) (60) (80) (100)(120)(140)
p [psi (bar)]
t
[°F (°C)]