Shaft Sealing; Bearing; Approximate Value For Sound Pressure Level; Permitted Nozzle Loads And Torques At The Pump Nozzles - Xylem Lowara LSB Série Instructions De Montage

Installation, Operation and Maintenance Instruction
S1 - Single-mech. seal acc. DIN 24960 l1k /
EN 12756 form U
S4 - Single-mech. seal acc. DIN 24960 l1k /
EN 12756 form U
with Quench (throttle bush)
Position (5) - Material Impeller
N = Cast Iron (0.6025)
L = Ductile Iron (0.7043)
V = Carbon Steel (1.4408)
W = Duplex (1.4517)
Position (6) - Material pump casing (same coding as
impeller, cast iron not available)
Position (7) - Stub shaft
2 - without shaft sleeve (Duplex 1.4462 std)
Position (8) - IEC Motor size

3.2 Shaft Sealing

Pumps of design LSB are exclusively sealed with
single mech. seals with installation dimensions acc. to
EN 12756 (DIN 24960), design "K", form "U".
Two shaft sealing variants are available. On the data
sheet and / or the order confirmation the kind of shaft
sealing is given. An instruction for the mounting and
operation of mech. seals is contained in the particular
"Mounting Instruction of Shaft Sealing".
For nominal size (d ) of the mech. seal refer to
1
following chart.
nom. size
Type d of mech.
1
seal
40-25-160 33
40-25-200 33
40-25-250 43
50-32-160 33
50-32-200 33
50-32-250 43
50-32-315 43
65-40-160 33
65-40-200 33
65-40-250 43
65-40-315 43
80-50-160 33
80-50-200 33
80-50-250 43
80-50-315 43
The mech. seal used in the standard design is
not resistant to mineral oils.
For further details about mech. seals, as well as
the dangers of accidents, connected to them
refer to chapter 6.6 and chapter 7.2.

3.3 Bearing

The shaft is guided by the ball bearings of the motor.
The bearings are grease lubricated for life and,
therefore maintenance-free.
LSB 100-english
Artikel Nr. 771076129
nom. size
Type d of mech.
1
seal
100-65-160 43
100-65-200 43
100-65-250 43
100-65-315 53
125-80-160 43
125-80-200 43
125-80-250 43
125-80-315 53
125-100-200 43
125-100-250 53
125-100-315 53
150-125-250 53
150-125-315 53
200-150-250 53
page 77
3.4 Approximate Value for Sound
Pressure Level
Sound pressure level L
Nominal
power Pump alone
P
2950 1450
N
-1 -1
in kW
min min
0,55 50,5 49,5
0,75 52,0 51,0
1,1 54,0 53,0
1,5 55,5 55,0
2,2 58,0 57,0
3,0 59,5 58,5
4,0 61,0 60,0
5,5 63,0 62,0
7,5 64,5 63,5
11,0 66,5 65,5
15,0 68,0 67,0
18,5 69,0 68,5
22,0 70,5 69,5
30,0 72,0 71,0
37,0 73,0 -
Sound pressure level L
from pump surface acc. to DIN 45635, part 1 and 24.
Room and foundation influences are not considered.
The tolerance for these values is ±3 dB(A).
Addition with 60 Hz-operation:
Pump alone: −
Pump with motor: +4 dB(A)
3.5 Permitted Nozzle Loads and Torques
at the Pump Nozzles ...
... following the Europump-Recommendation for
pump acc. to ISO 5199.
The data for forces and torques are only valid for
static piping loads.
All values for forces and torques refer to standard
materials EN-GJS400-18LT and 1.4408.
Model LSB
in dB(A)
pA
Pump + Motor
975 2950 1450
-1 -1 -1
min min min
49,0 58,0 52,0
50,5 59,0 54,0
52,5 60,0 55,5
54,5 63,5 57,0
56,5 64,5 59,0
58,0 68,5 61,0
59,5 69,0 63,0
61,5 70,0 65,0
63,0 70,5 67,0
65,0 72,0 69,0
66,5 72,5 70,0
68,0 73,0 70,5
69,0 74,5 71,0
- 75,0 72,0
- 76,0 -
measured in 1 m distance
pA
pic 1
975
-1
min
51,5
53,0
54,5
56,0
58,5
62,0
63,0
65,0
67,0
68,5
70,5
74,0
74,0
-
-