Example: the load per one vibro-isolator is 280 kg, and the operating frequency of the device is 2300 rpm. Follow the 5 steps to read from the table (as shown in the above diagram) to find out if the selected vibro-isolator meets the damping conditions and is well-matched.
The motor’s speed (rpm) causes vibrations (Hz) in HVAC devices. To simplify product selection, we’ve organized tables by speed, as it’s easily obtainable from suppliers.
Select the weight of the device in the table – greater than or equal to 280 kg
Horizontally to the left, you can see the product number of Walraven VibraTek®
Horizontally to the right, you can read the deflection
Locate the column with a frequency lower than 2300 rpm
Read the damping performance at: cross-deflection and frequency
Damping efficiency upon disturbing frequency
Damping performance description (colour coded)
V[%]
Damping performance description
99%
excellent
high requirements
medium requirements
regular requirements
93%
perfect
88%
very good
81%
good
67%
sufficient
20%
mediocre
low improvement or negative impact – contact Walraven Technical Support for alternative solution
0%
nochange
resonance
better without insulation
These tables show the efficiency of the vibration damping for each product, dependent on the installation criteria. Follow the 5 steps in the instructions above to read each table. The colour coding then shows the suitability.
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