The characteristics:
- Weight: very light – light – heavy
- Disturbing frequency: low – medium – high
- Mounting: hanging
Find below our tables of Damping efficiency upon disturbing frequency
Walraven VibraTek® selection matrix:
Walraven VibraTek® HS-1 Spring Hanger
- simple to install and does not need to be fixed to the base material
- recommended for machinery with low working speeds above 700 RPM
- epoxy powder-coated housing, cap and spring provide increased resistance to corrosion
Walraven VibraTek® HS-1X Spring Hanger
- simple to install and does not need to be fixed to the base material
- recommended for machinery with low working speeds above 700 RPM
- epoxy powder-coated housing, cap and spring provide increased resistance to corrosion
Walraven VibraTek® HR-1 Rubber Hanger
- small footprint allows placement in compact spaces
- simple to install and adaptable to a sloping roof or ceiling, part of the metal housing swivels
- hardness 45 / 50 shore A
Walraven VibraTek® SA-3 Silent Absorber
- formed of two rubber parts which fit into each other, making it is suitable for various fixing plate thicknesses
- ideal isolation of HVAC equipment
- for use with M8 threaded rods
How to evaluate the suitability of an isolator?
How to read the tables?
Example: the load per one vibro-isolator is 280 kg, and the operating frequency of the device is 2300 rpm. See the 5 steps to read from the table (as shown in the attached 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
| 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 | |||
Walraven VibraTek® HS-1
| Walraven VibraTek® HS-1 | Damping efficiency upon disturbing frequency | ||||||||||
| Article no.: | load on vibroisolator | deflection | RPM | 500 | 800 | 1000 | 1200 | 1500 | 2000 | 2500 | |
| [N] | [~kg] | [mm] | Hz | 8,3 | 13,3 | 16,7 | 20,0 | 25,0 | 33,3 | 41,7 | |
| 2800600050 | 25 | 2,5 | 11,5 | 54,6% | 86,1% | 91,5% | 94,3% | 96,4% | 98,0% | 98,7% | |
| 50 | 5 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800600150 | 100 | 10 | 15,3 | 69,4% | 89,9% | 93,8% | 95,8% | 97,3% | 98,5% | 99,1% | |
| 150 | 15 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800600250 | 200 | 20 | 18,4 | 75,8% | 91,7% | 94,9% | 96,5% | 97,8% | 98,8% | 99,2% | |
| 250 | 25 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800600500 | 300 | 30 | 13,8 | 64,8% | 88,7% | 93,0% | 95,3% | 97,0% | 98,3% | 98,9% | |
| 400 | 40 | 18,4 | 75,8% | 91,7% | 94,9% | 96,5% | 97,8% | 98,8% | 99,2% | ||
| 500 | 50 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800600750 | 600 | 60 | 18,4 | 75,8% | 91,7% | 94,9% | 96,5% | 97,8% | 98,8% | 99,2% | |
| 750 | 75 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800601000 | 800 | 80 | 18,4 | 75,8% | 91,7% | 94,9% | 96,5% | 97,8% | 98,8% | 99,2% | |
| 900 | 90 | 20,7 | 79,0% | 92,7% | 95,5% | 96,9% | 98,0% | 98,9% | 99,3% | ||
| 1000 | 100 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
Walraven VibraTek® HS-1X
| Walraven VibraTek® HS-1X | Damping efficiency upon disturbing frequency | ||||||||||
| Article no.: | load on vibroisolator | deflection | RPM | 500 | 800 | 1000 | 1200 | 1500 | 2000 | 2500 | |
| [N] | [~kg] | [mm] | Hz | 8,3 | 13,3 | 16,7 | 20,0 | 25,0 | 33,3 | 41,7 | |
| 2800701000 | 800 | 80 | 18,4 | 75,8% | 91,7% | 94,9% | 96,5% | 97,8% | 98,8% | 99,2% | |
| 1000 | 100 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800701250 | 1100 | 110 | 20,2 | 78,4% | 92,6% | 95,4% | 96,8% | 98,0% | 98,9% | 99,3% | |
| 1250 | 125 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800701500 | 1400 | 140 | 21,5 | 79,9% | 93,0% | 95,6% | 97,0% | 98,1% | 98,9% | 99,3% | |
| 1500 | 150 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800702000 | 1750 | 175 | 18,3 | 75,6% | 91,7% | 94,8% | 96,5% | 97,8% | 98,8% | 99,2% | |
| 2000 | 200 | 20,9 | 79,3% | 92,8% | 95,5% | 96,9% | 98,1% | 98,9% | 99,3% | ||
| 2200 | 220 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800703000 | 2600 | 260 | 19,9 | 78,0% | 92,4% | 95,3% | 96,8% | 98,0% | 98,9% | 99,3% | |
| 3000 | 300 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800704000 | 3250 | 325 | 18,7 | 76,2% | 91,9% | 95,0% | 96,5% | 97,8% | 98,8% | 99,2% | |
| 3750 | 375 | 21,6 | 80,0% | 93,0% | 95,7% | 97,0% | 98,1% | 98,9% | 99,3% | ||
| 4000 | 400 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800705000 | 5250 | 525 | 24,2 | 82,5% | 93,8% | 96,1% | 97,4% | 98,3% | 99,1% | 99,4% | |
| 5750 | 575 | 26,5 | 84,3% | 94,4% | 96,5% | 97,6% | 98,5% | 99,1% | 99,5% | ||
| 5000 | 500 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
| 2800706000 | 5250 | 525 | 20,1 | 78,3% | 92,5% | 95,3% | 96,8% | 98,0% | 98,9% | 99,3% | |
| 5750 | 575 | 22,0 | 80,5% | 93,2% | 95,8% | 97,1% | 98,2% | 99,0% | 99,3% | ||
| 6000 | 600 | 23,0 | 81,5% | 93,5% | 95,9% | 97,2% | 98,2% | 99,0% | 99,4% | ||
Walraven VibraTek® HR-1
| Walraven VibraTek® HR-1 | Damping efficiency upon disturbing frequency | ||||||||||
| Article no.: | load on vibroisolator | deflection | RPM | 500 | 800 | 1000 | 1200 | 1500 | 2000 | 2500 | |
| [N] | [~kg] | [mm] | Hz | 8,3 | 13,3 | 16,7 | 20,0 | 25,0 | 33,3 | 41,7 | |
| 2800800300 | 200 | 20 | 2,3 | 385,6% | -50,7% | 37,5% | 63,5% | 79,4% | 89,4% | 93,4% | |
| 250 | 25 | 2,9 | 633,0% | 7,4% | 55,5% | 72,8% | 84,2% | 91,7% | 94,8% | ||
| 300 | 30 | 3,5 | 4077,4% | 33,1% | 65,5% | 78,3% | 87,1% | 93,1% | 95,7% | ||
| 2800800450 | 350 | 35 | 3,1 | 849,3% | 17,9% | 59,5% | 74,9% | 85,3% | 92,2% | 95,2% | |
| 400 | 40 | 3,6 | 10443,2% | 34,9% | 66,2% | 78,7% | 87,4% | 93,3% | 95,8% | ||
| 450 | 45 | 4,0 | -776,2% | 46,0% | 71,1% | 81,5% | 88,9% | 94,1% | 96,3% | ||
Walraven VibraTek® SA-3
| Walraven VibraTek® SA-3 | Damping efficiency upon disturbing frequency | ||||||||||
| Article no.: | load on vibroisolator | deflection | RPM | 500 | 800 | 1000 | 1200 | 1500 | 2000 | 2500 | |
| [N] | [~kg] | [mm] | Hz | 8,3 | 13,3 | 16,7 | 20,0 | 25,0 | 33,3 | 41,7 | |
| 2800800300 | 200 | 20 | 2,3 | 385,6% | -50,7% | 37,5% | 63,5% | 79,4% | 89,4% | 93,4% | |
| 250 | 25 | 2,9 | 633,0% | 7,4% | 55,5% | 72,8% | 84,2% | 91,7% | 94,8% | ||
| 300 | 30 | 3,5 | 4077,4% | 33,1% | 65,5% | 78,3% | 87,1% | 93,1% | 95,7% | ||
| 2800800450 | 350 | 35 | 3,1 | 849,3% | 17,9% | 59,5% | 74,9% | 85,3% | 92,2% | 95,2% | |
| 400 | 40 | 3,6 | 10443,2% | 34,9% | 66,2% | 78,7% | 87,4% | 93,3% | 95,8% | ||
| 450 | 45 | 4,0 | -776,2% | 46,0% | 71,1% | 81,5% | 88,9% | 94,1% | 96,3% | ||
