108 | 180R9346 | AQ240486503020en-001702
© Danfoss | 2023.03
Operation guide
Installation, Operation and Maintenance APP 53-92 pumps
Cause
Remedy
Comments
5.1 Inlet/outlet connections (hoses/pipes)
5.1.1 Use flexible hoses at inlet/outlet connec-
tions. Danfoss can provide flexible hoses.
Please contact Danfoss High Pressure
Pumps sales office for further information.
5.1.2 Mount the connections to the frame by a
vibration dampener mounting plate.
Non-flexible connections mounted directly on
the frame will cause even small pressure
pulsations from pump and create vibrations in
the system/plant.
5.2 Length/dimension of inlet/outlet line
5.2.1 Increase pipe diameter and/or reduce the
number of bends.
Too small pipes or too many bends may create
too fast flow/turbulence through the pipes and
thus increase the noise level.
5.3 Hose stiffness
5.3.1 Use a more flexible hose. Danfoss can
provide flexible hoses. Please contact
Danfoss High Pressure Pumps sales office
for further information.
Too stiff hoses cannot dampen the small
pressure pulsations from the pump, and
subsequently vibrations occur in the system/
plant.
5.4 Hoses/pipes mounted directly on frame
5.4.1 Mount the connections to the frame by a
vibration dampener mounting plate.
If the hoses are mounted directly on the frame,
the small pressure pulsations from the pump
can be transferred to the frame and the rest of
the system/plant.
5.5 Vibration dampener under the electric
motor
5.5.1 Mount a vibration dampener below the
motor/pump.
When no dampener is installed below the
electric motor, vibrations from the motor and
pump may be transferred to the frame and the
rest of the system/plant.
5.
Noise from installation
