Appendix
9.2 Technical specifications
More technical specifications (→ order data sheet).
9.2.1 Stub shaft diameter at the shaft seal
Pump size
Diameter of the stub shaft at
the shaft seal [mm]
20-160 16
32-125
40-125
50-125
65-125
24
25-200
32-160
32-200
40-160
40-200
40-250
50-160
50-200
50-250
65-160
65-200
80-160
30
single stage
2/25-200
2/32-200
2/40-250
2/50-250
30
two stages
65-250
65-315
65-400
80-200
80-250
80-315
100-200
100-250
100-315
125-250
40
Tab. 15 Assignment of the pump size to the stub
shaft diameter
9.2.2 Ambient conditions
Operation under other ambient conditions should be
agreed with the manufacturer
Relative humidity [%]
Tempera-
ture [°C]
Long-term
Short-term
Setup
height
above sea
level [m]
–20 to +40 ≤ 85 ≤ 100 ≤ 1000
Tab. 16 Ambient conditions
9.2.3 Sound pressure levels
Measuring conditions:
• Distance to the pump: 1 m
• Operation: cavitation-free
• Motor: IEC standard motor
• Tolerance ±3 dB
Lower-noise versions of the motors are available if the
expected noise levels exceed the permissible limits.
Sound pressure level [dB] for pump
with motor at speed [rpm]
Nominal motor
power PM [kW]
1450 1750 2900 3500
1.5 58 58.5 63 64
2.2 60 60.5 66 67
3.0 62 62.5 68 69
4.0 63 63.5 69 70
5.5
65 65.5 71 72
7.5
66 66.5 72 73
11.0 68 68.5 74
75
15.0 69 69.5
75
76
18.5 70 70.5 76
77
22.0 71 71.5
77
78
30.0 72 72.5 78 79
37.0 73 73.5 79 80
45.0 74 74.5 80 81
55.0
75 75.5
80 81
75.0 76 76.5 81 82
90.0 76 76.5 82 83
110.0
77 77.5
82 83
Tab. 17 Sound pressure level
550 113 – 146-900/E BA-2021.06 en-US NI series 39
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