Closed S-Tube® To Open S-Tube® Conversion; Medium-Head Hydraulics With Sand Guard Ring Conversion - Grundfos SE 9-30 kW Service Manual

Description Poles
Shaft seal cartridge
"A"
Shaft seal cartridge
1.4517 "A"
Shaft seal kits can be found on Grundfos Product Center (GPC).
For further information, contact Grundfos.
Lower bearing
All pumps in the SE/SL 9-30 kW / 12-42 Hp range use the same
type of lower bearing, and the bearing comes in three different
sizes. The latest version of the lower bearing is the doubled-sealed
(2RS) version, that was introduced to the pump range in week 43,
2019. The 2RS bearing is compatible with the previous version. All
kits containing the lower bearing have the 2RS-type bearing.
16.4 Closed S-tube® to Open S-tube® conversion
It is possible to convert Closed S-tube to Open S-tube® for most super-high head, and high head-class pumps. Conversion kits are available
on GPC.
On the same motor, pump performance curves of Open and Closed S-tube hydraulics can be different. When comparing pump curves with the
same duty point, the P2 of the pumps may be different. When converting a Closed S-tube hydraulics to Open S-tube hydraulics, the pairing of
the new hydraulics to the existing motor is always based on the motor power. For some pumps, the duty point changes slightly after the
conversion. For further information, contact Grundfos.
50 Hz
Open S-tube hydraul-
Closed S-tube hy-
ics with matching or
draulics
better pump curves
26.5 kW
24 kW 26.5 kW
22 kW 24 kW
20 kW 20 kW
18.5 kW 18.5 kW
17 kW 18.5 kW
15 kW 15 kW
13 kW 13 kW
50 Hz
Open S-tube hydraul-
Closed S-tube hy-
ics with matching or
draulics
better pump curves
22 kW 22 kW
20 kW 20 kW
18.5 kW 20 kW
17 kW 18.5 kW
15 kW 17 kW
13 kW 13 kW
11 kW 13 kW
10 kW 11 kW
16.5 Medium-head hydraulics with sand guard ring
conversion
A version of the current medium-head S-tube hydraulics with a
sand guard ring is available and can be retrofitted onto existing
medium head-class pumps. This type of hydraulics is for
Material grade
6
4 1.4308
2
6
4 1.4517
2
Super-high head (S) hydraulic head class
60 Hz DIN
Closed S-tube hy-
draulics
- 31 kW
29 kW
25 kW
22 kW
18.5 kW
17 kW
15 kW
13 kW
High-head (H) hydraulic head class
Closed S-tube hy-
draulics
24.5 kW
22 kW
20 kW
18 kW
15 kW
13 kW
11 kW
9 kW
Description
Lower bearing
Shaft seal and lower bearing
The 2RS lower bearing and 1.4308 material grade "A" version shaft
seal can be found in a combined service kit on GPC. These kits are
available in three different sizes.
Description
Shaft seal "A" with 2RS lower
bearing
60 Hz
Open S-tube hydraul-
Closed S-tube hy-
ics with matching or
better pump curves
31 kW
29 kW
25 kW
22 kW
18.5 kW
17 kW
15 kW
13 kW
60 Hz
60 Hz DIN
Open S-tube hydraul-
Closed S-tube hy-
ics with matching or
better pump curves
-
22 kW
20 kW
18 kW
15 kW
13 kW
13 kW
11 kW
applications with high amounts of long fibres. A sand guard ring is
permanently mounted in the volute of the pump, and the hydraulics
use a modified impeller design.
For further information, contact Grundfos.
Poles Lower bearing seal
6
4 2RS
2
Shaft seal Lower
Poles material bearing
grade seal
6
4 1.4308 2RS
2
60 Hz ANSI
Open S-tube hydraul-
ics with matching or
draulics
better pump curves
42 Hp 42 Hp
39 Hp 39 Hp
33.5 Hp 33.5 Hp
30 Hp 30 Hp
25 Hp 25 Hp
23 Hp 23 Hp
20 Hp 20 Hp
17.5 Hp 17.5 Hp
60 Hz ANSI
Open S-tube hydraul-
ics with matching or
draulics
better pump curves
33 Hp -
30 Hp 30 Hp
27 Hp 27 Hp
24.5 Hp 24.5 Hp
20 Hp 20 Hp
17.5 Hp 17.5 Hp
15 Hp 17.5 Hp
12 Hp 15 Hp
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