In general, this should always be considered for pumps with motor sizes starting
from 11 kW. But unwanted vibrations and noises occur also with smaller motor
sizes.
Noise and vibration are caused by the rotating parts in the motor and the pump
and by the flow in the pipes and fittings.
The effect on the environment is subjective and depends largely on the correct
installation and the nature of the rest of the system.
Foundation
Vibration damping is best achieved if the pump is set up on a flat, solid concrete
foundation.
As a guideline, the concrete foundation should be 1.5 times as heavy as the
pump.
Vibration damper
To avoid the transmission of vibrations to the building, it is recommended to
disconnect the pump foundation from parts of the building using vibration
dampers.
Selecting the correct vibration damper requires the following data:
•
Forces transmitted via the vibration damper
•
Motor speed, if necessary, taking into account a speed control
•
Required damping in % (suggested value: 70 %)
The correct damper depends on the respective installation. An incorrectly
designed damper may even increase the vibration. Vibration dampers should
therefore be designed by the vendor of the vibration damper.
Compensators
If the pump is mounted on a foundation along with vibration dampers, be sure to
install compensators at the pipe connections. This prevents the pump from
“hanging” in the connections.
Compensators are installed to
•
absorb expansion/shrinking in the piping caused by varying fluid
temperatures;
•
reduce mechanical stress occurring in conjunction with pressure surges in the
system;
•
absorb noise caused by the system in the piping (only rubber ball
compensators).
Note: Compensators must not be used to compensate for inaccuracies in the
piping, for example, to compensate for an offset in the centre of the connections.
Install the compensators both on the suction side and pressure side at a
minimum distance to the pump, which is 1-1.5 times the nominal diameter of the
piping. This allows for an improved flow on the suction side of the pump, as well
as reduced pressure drop on the pressure side.
For connections with a size over DN 100, we always recommend compensators
with length limiters.
Assembly and installation
Setup, installation, and connection
BA.H2A.ADY.002.GB_1
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