How to choose suitable vibration isolators for rooftop chillers, refrigeration and air handling units?

The characteristics:

Weight: light – heavy – very heavy
Disturbing frequency: low – medium – high
Mounting: standing

Find below our tables of Damping efficiency upon disturbing frequency

vibration isolators for rooftop chillers, refrigeration and air handling units

Walraven VibraTek® selection matrix:

How to evaluate the suitability of an isolator?

walraven vibratek how to redt the tables

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	high requirements
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%
2800200150	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%
2800200250	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%
2800200500	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%
2800201000	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%
2800300050	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%
2800300150	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%
2800300250	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%
2800300750	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® MS-1X

Walraven VibraTek® MS-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
2800401250	1100	110	22,0		80,5%	93,2%	95,7%	97,1%	98,2%	99,0%	99,3%
2800401250	1500	125	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2800401500	1400	140	23,3		81,8%	93,6%	96,0%	97,3%	98,3%	99,0%	99,4%
2800401500	1500	150	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2800402000	1750	175	21,9		80,4%	93,1%	95,7%	97,1%	98,1%	99,0%	99,3%
2800402000	2000	200	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2800403000	2200	220	18,3		75,6%	91,7%	94,9%	96,5%	97,8%	98,8%	99,2%
	2600	260	21,7		80,1%	93,1%	95,7%	97,0%	98,1%	99,0%	99,3%
	3000	300	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2800404000	3500	350	21,9		80,4%	93,1%	95,7%	97,1%	98,1%	99,0%	99,3%
2800404000	4000	400	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2800405000	4300	430	21,5		80,0%	93,0%	95,6%	97,0%	98,1%	98,9%	99,3%
	4600	460	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
	5000	500	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2800406000	5300	530	22,1		80,6%	93,2%	95,8%	97,1%	98,2%	99,0%	99,3%
	5600	560	23,3		81,8%	93,6%	96,0%	97,3%	98,3%	99,0%	99,4%
	6000	600	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%

Walraven VibraTek® MS-1X-CBL

Walraven VibraTek® MS-1X-CBL				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
2801901000	800	80	20,0		78,1%	92,5%	95,3%	96,8%	98,0%	98,9%	99,3%
2801901000	1000	100	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2801901250	1100	110	22,0		80,5%	93,2%	95,7%	97,1%	98,2%	99,0%	99,3%
2801901250	1250	125	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2801901500	1400	140	23,3		81,8%	93,6%	96,0%	97,3%	98,3%	99,0%	99,4%
2801901500	1500	150	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2801902000	1750	175	21,9		80,4%	93,1%	95,7%	97,1%	98,1%	99,0%	99,3%
2801902000	2000	200	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2801903000	2200	220	18,3		75,6%	91,7%	94,9%	96,5%	97,8%	98,8%	99,2%
	2600	260	21,7		80,1%	93,1%	95,7%	97,0%	98,1%	99,0%	99,3%
	3000	300	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2801904000	3500	350	21,9		80,4%	93,1%	95,7%	97,1%	98,1%	99,0%	99,3%
2801904000	4000	400	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2801905000	4300	430	21,5		80,0%	93,0%	95,6%	97,0%	98,1%	98,9%	99,3%
	4600	460	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
	5000	500	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2801906000	5300	530	22,1		80,6%	93,2%	95,8%	97,1%	98,2%	99,0%	99,3%
	5600	560	23,3		81,8%	93,6%	96,0%	97,3%	98,3%	99,0%	99,4%
	6000	600	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%

Walraven VibraTek® MS-2X

Walraven VibraTek® MS-2X				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
2802003000	2000	200	16,7		72,5%	90,8%	94,3%	96,1%	97,5%	98,6%	99,1%
2802003000	3000	300	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2802004000	3500	350	21,9		80,4%	93,1%	95,7%	97,1%	98,1%	99,0%	99,3%
2802004000	4000	400	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2802006000	5000	500	20,8		79,2%	92,8%	95,5%	96,9%	98,0%	98,9%	99,3%
2802006000	6000	600	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2802008000	7000	700	21,9		80,4%	93,1%	95,7%	97,1%	98,1%	99,0%	99,3%
	7500	750	23,4		81,9%	93,6%	96,0%	97,3%	98,3%	99,0%	99,4%
	8000	800	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2802010000	9000	900	22,5		81,0%	93,4%	95,8%	97,2%	98,2%	99,0%	99,4%
2802010000	10000	1000	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%
2802012000	11000	1100	22,9		81,4%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
	11500	1150	24,0		82,4%	93,8%	96,1%	97,3%	98,3%	99,1%	99,4%
	12000	1200	25,0		83,2%	94,1%	96,3%	97,4%	98,4%	99,1%	99,4%

Walraven VibraTek® MS-4

Walraven VibraTek® MS-4				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
2800501000	800	80	18,4		75,8%	91,7%	94,9%	96,5%	97,8%	98,8%	99,2%
2800501000	1000	100	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
2800501500	1250	125	19,2		77,0%	92,1%	95,1%	96,6%	97,9%	98,8%	99,2%
2800501500	1500	150	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
2800502000	1750	175	20,1		78,3%	92,5%	95,3%	96,8%	98,0%	98,9%	99,3%
2800502000	2000	200	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
2800503000	2250	225	17,3		73,7%	91,2%	94,5%	96,3%	97,6%	98,7%	99,2%
	2750	275	21,1		79,5%	92,9%	95,6%	97,0%	98,1%	98,9%	99,3%
	3000	300	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
2800504000	3500	350	20,1		78,3%	92,5%	95,3%	96,8%	98,0%	98,9%	99,3%
2800504000	4000	400	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%
2800505000	4250	425	19,6		77,5%	92,3%	95,2%	96,7%	97,9%	98,8%	99,3%
	4750	475	21,9		80,3%	93,1%	95,7%	97,1%	98,1%	99,0%	99,3%
	5000	500	23,0		81,5%	93,5%	95,9%	97,2%	98,2%	99,0%	99,4%

Walraven VibraTek® MR-B

Walraven VibraTek® MR-B				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
2801800240	200	20	2,9		633,0%	7,4%	55,5%	72,8%	84,2%	91,7%	94,8%
2801800240	240	24	3,5		4077,4%	33,1%	65,5%	78,3%	87,1%	93,1%	95,7%
2801800750	450	45	2,4		401,6%	-40,6%	40,3%	64,9%	80,1%	89,7%	93,6%
2801800750	750	75	4,0		-776,2%	46,0%	71,1%	81,5%	88,9%	94,1%	96,3%
2801801500	1000	100	3,7		-4599,3%	38,1%	67,6%	79,5%	87,8%	93,5%	95,9%
2801801500	1500	150	5,5		-88,0%	65,8%	80,5%	87,2%	92,2%	95,7%	97,3%