14
KM70
ENG_DEBEM S.r.l.
Rev. 01A-EN
01/03/2021
2.7 Noise
The noise levels shown in the following chart refer to pump (A) operation in normal working conditions
coupled with an electric motor (B) at a speed of 2900 rpm.
The values of the graph, as per ISO 3744 and EN 12639, are valid for operating range Q/Q
opt
= 0.8-1.1
without cavitation. Add an allowance of 3 dB to allow for the tolerance of measuring tools.
Fig. 7
Noise chart in logarithmic scale.
The major sources of noise are not connected with the pump.
We would like to remind you that the most frequent sources include:
• liquid turbulence in the plant
• cavitation (not dependent on the manufacturer)
The user must provide adequate protective equipment if the sources of noise
generate a noise level harmful for operators and for the environment (in
accordance with current regulations).
