The characteristics:
- Weight: very light – light
- Disturbing frequency: medium – high
- Mounting: standing
Find below our tables of Damping efficiency upon disturbing frequency
Walraven VibraTek® selection matrix:
Walraven VibraTek® MS-M Spring Mount
- low-rise spring isolator with M8 external thread for light equipment or tight spaces
- recommended for machinery with working speeds above 1000 rpm
- steel frame attached to spring mechanically with metal rivets
Walraven VibraTek® MS-1 Spring Mount
- recommended for equipment with low working speeds, from 700 RPM and above
- epoxy powder-coated base, caps and springs provide increased resistance to corrosion
- ribs in the metal base provide increased stiffness
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
Walraven VibraTek® SB-MM Silentblock
- a universal rubber absorber, ideal for use with all kinds of elastic suspension or mounting of equipment
- ideal for use with machinery and equipment mounted on metallic surface
- for use in compression only
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® MS-M
| Walraven VibraTek® MS-M |
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 | |
| 2800200150 | 100 | 10 | 8,0 | 18,6% | 78,7% | 87,4% | 91,6% | 94,8% | 97,1% | 98,2% | |
| 150 | 15 | 12,0 | 57,3% | 86,8% | 91,9% | 94,5% | 96,6% | 98,1% | 98,8% | ||
| 2800200250 | 200 | 20 | 9,6 | 40,3% | 82,9% | 89,7% | 93,1% | 95,7% | 97,6% | 98,5% | |
| 250 | 25 | 12,0 | 57,3% | 86,8% | 91,9% | 94,5% | 96,6% | 98,1% | 98,8% | ||
| 2800200500 | 350 | 35 | 8,4 | 25,4% | 80,0% | 88,0% | 92,0% | 95,0% | 97,3% | 98,3% | |
| 500 | 50 | 12,0 | 57,3% | 86,8% | 91,9% | 94,5% | 96,6% | 98,1% | 98,8% | ||
| 2800200750 | 550 | 55 | 8,8 | 31,1% | 81,0% | 88,6% | 92,4% | 95,3% | 97,4% | 98,3% | |
| 600 | 60 | 9,6 | 40,3% | 82,9% | 89,7% | 93,1% | 95,7% | 97,6% | 98,5% | ||
| 750 | 75 | 12,0 | 57,3% | 86,8% | 91,9% | 94,5% | 96,6% | 98,1% | 98,8% | ||
| 2800201000 | 850 | 85 | 10,2 | 45,7% | 84,1% | 90,4% | 93,5% | 95,9% | 97,8% | 98,6% | |
| 1000 | 100 | 12,0 | 57,3% | 86,8% | 91,9% | 94,5% | 96,6% | 98,1% | 98,8% | ||
Walraven VibraTek® MS-1
| Walraven VibraTek® MS-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 | |
| 2800300050 | 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% | ||
| 2800300150 | 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% | ||
| 2800300250 | 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% | ||
| 2800300500 | 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% | ||
| 2800300750 | 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% | ||
| 2800301000 | 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® SA-3 Silent Absorber
| 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% | ||
Walraven VibraTek® SB-MM Silentblock
| Walraven VibraTek® SB-MM | 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 | |
| 2801400180 | 150 | 15 | 1,7 | 286,6% | -430,8% | -16,7% | 40,3% | 68,5% | 84,4% | 90,6% | |
| 180 | 18 | 2,0 | 325,8% | -134,7% | 18,6% | 54,7% | 75,1% | 87,4% | 92,3% | ||
| 2801400290 | 250 | 25 | 1,7 | 292,4% | -336,0% | -8,6% | 43,4% | 69,9% | 85,0% | 90,9% | |
| 290 | 29 | 2,0 | 325,8% | -134,7% | 18,6% | 54,7% | 75,1% | 87,4% | 92,3% | ||
| 2801400420 | 350 | 35 | 2,1 | 338,2% | -106,0% | 24,3% | 57,3% | 76,3% | 87,9% | 92,6% | |
| 420 | 42 | 2,5 | 429,3% | -27,8% | 44,0% | 66,8% | 81,0% | 90,1% | 93,9% | ||
| 2801400750 | 450 | 45 | 2,4 | 401,6% | -40,6% | 40,3% | 64,9% | 80,1% | 89,7% | 93,6% | |
| 550 | 55 | 2,9 | 646,5% | 8,4% | 55,9% | 73,0% | 84,3% | 91,7% | 94,9% | ||
| 750 | 75 | 4,0 | -776,2% | 46,0% | 71,1% | 81,5% | 88,9% | 94,1% | 96,3% | ||
| 2801401170 | 1000 | 100 | 3,4 | 2193,9% | 30,4% | 64,4% | 77,7% | 86,8% | 93,0% | 95,6% | |
| 1170 | 117 | 4,0 | -776,2% | 46,0% | 71,1% | 81,5% | 88,9% | 94,1% | 96,3% | ||
| 2801401690 | 1200 | 120 | 2,8 | 578,7% | 2,5% | 53,8% | 71,9% | 83,7% | 91,4% | 94,7% | |
| 1500 | 150 | 3,6 | 9082,1% | 34,7% | 66,2% | 78,7% | 87,3% | 93,3% | 95,8% | ||
| 1690 | 169 | 4,0 | -776,2% | 46,0% | 71,1% | 81,5% | 88,9% | 94,1% | 96,3% | ||
