Spring Isolators VT4413 and VT4423

This is a steel spring with a resilient element in stainless steel. Excellent for vibration isolation because of its very low natural frequency of 5-6 Hz. The VT4413 is a series of smaller springs from 1 to 10 and a load range spanning from 5 to 145 kg. The VT4423 is a series of seven larger springs with a load range spanning from 30 kg up to 590 kg. For specific load ranges per spring isolator; view their information from the technical specification sheet below.

Product Characteristics

Very soft to soft isolators designed for loading in compression only.

Scrolls: aluminium
Weights for VT4413 (depending on suffix): 0.13 – 0.21 kg
Weights for VT4423 (depending on suffix): 1.20 – 1.50 kg
Maximum excitation amplitude: ± 1 mm.
Mechanical strength: 2 g
Natural frequency: 5 – 6 Hz
Amplification factor: < 5
Temperature range: -90° to +300° C.

Product Applications

Isolation of machines rotating at 600 rpm and up to 800 rpm – fans, compressors, generating sets, engines etc. with or without seismic blocks. Protection of fragile equipment from vibrations.

For machines with rotations of 800 rpm and over see our spring isolators VT4412 and VT4422.

Note

The mounts are delivered without mounting plate, which can be ordered separately. For greater static loads, multiple spring isolators are mounted together as a package. View our spring packages or consult us.

Technical Specifications

A technical drawing of the spring isolators VT4413 and VT4423

A technical drawing of the mounting plate for the spring isolator VT4413 and VT4423

Spring isolators VT4413 and VT4423 technical specificationsspring-isolator-vt4413-and-vt4423-technical-specifications.xlsx

Load ranges

Suffix	Load range in daN (≈kg)		Stiffness (N/mm)
Suffix	VT4413	VT4423	VT4413	VT4423
-01	5 - 7	30 - 50	6	39
-02	6 - 9	50 - 80	8	64
-03	9 -14	80 - 125	11	108
-04	14 - 20	125 - 195	18	167
-05	20 - 30	195 - 310	27	265
-06	30 - 50	310 - 420	40	353
-07	45 - 65	390 - 590	-	490
-08	60 - 95	-	-	-
-09	85 - 120	-	-	-
-10	100 - 145	-	-	-

Spring isolator dimensions

Ref.	D	d	H	h
Ref.	(mm)	(mm)	(mm)	(mm)
VT4413	50	M10	60	50 ± 2
VT4423	80	M12	90	80 ± 2

Mounting plate dimensions

Ref.	L	I	J	B	C	E	Thickness
Ref.	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)
Mounting plate for VT4413	90	69.6	10	60	7	11	4
Mounting plate for VT4423	140	110	15	100	11	13	4