Jump to content
Image of Vibratec Spring Package VT4660-B

Spring Package VT4660-B

Pre-Compressed Spring Boxes primarily used for vibration isolation of heavy machine foundation and buildings. The VT4660-serie is used where the requirement for resonance frequency is approximately 2 Hz. These isolators consist of nested springs inside reinforced steel boxes, and are pre-compressed with a specific load.

Variations

  • Image of Vibratec Spring Package VT-4660-B2

    Spring Package VT4660-B2

  • Image of Vibratec Spring Package VT-4660-B6

    Spring Package VT4660-B4

  • Image of Vibratec Spring Package VT-4660-B6

    Spring Package VT4660-B6

  • Image of Vibratec Spring Package VT-4660-B9

    Spring Package VT4660-B9

Product Characteristics

The advantages of pre-compressed isolators are:

The springs are pre-compressed to a deflection that equals a certain percentage (normally 80%) of the mass of the final building. During construction the isolator will be “released” once the pre-compression load has been applied, it will thus onlydeflect when the final 20% of the load is applied.

  • Isolators can also be installed after construction or replaced by the use of hydraulic jacks. To achieve this all isolators must be accessible.
  • By the use of nested springs the isolators can be fine tuned to a specific stiffness.
  • The springs are design to withstand blocking (complete coil contact) without exceeding stress limits and causing plastic deformation.
  • To minimize the effect of coil resonance in the springs the contact surfaces in the steel box are covered with an elastomer layer.

Spring material: 51CrV4 manufactured according to DIN 2096.

Finishing: shot peening + black powder coating alternatively Delta Magni Seal

Welded steel structure: mild steel S355 painted with primer and top coat.
Workmanship and tolerances in accordance with ISO 2768-1 Class M.

Product Applications

Pre-Compressed Spring Boxes primarily used for vibration isolation:

  • Heavy machine foundation
  • Buildings

Technical Specifications

spring-package-vt4660-b-technical-specifications.xlsx

Dimensions & Load range

Ref. L B A Load Range
(mm) (mm) (mm) (kN)
VT4660-B2 540 250 240 155 - 250
VT4660-B4 540 540 340 235 - 500
VT4660-B6 740 500 300 390 - 750
VT4660-B9 740 740 340 625 - 1120

Downloads

  • vt4660-b