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Spring Vibration Isolators

Open steel springs that carry floor-mounted equipment on a large deflection, so low-speed machines stop passing their vibration to the building. Colour-coded springs, interchangeable on site, on a rubber base.

See the range
AVI-B open spring isolator carrying an equipment frame, its bottom plate bolted down on a rubber pad

The range

Open spring isolators

  • AVI-S free-standing open spring isolator: red steel spring on a black rubber cup, with a levelling stud
    AVI-S

    Free-Standing Open Spring Isolator

    Stands on a rubber cup with no floor fixing, for equipment that does not need anchoring.

    25 or 50 mm (1″/2″) deflection · 7–1,280 kg per isolator

    Buy on Fixing Smith
  • AVI-B open spring isolator with a blue colour-coded steel spring, levelling bolt and bottom plate on a ribbed rubber pad
    AVI-B

    Spring Isolator with Bottom Plate

    A bottom plate with two fixing holes bolts it down; a rubber pad under the plate stops high-frequency vibration.

    25 or 50 mm (1″/2″) deflection · 7–1,280 kg per isolator

    Buy on Fixing Smith
  • Made to order

    Higher Deflection & Loads

    Deflections up to 100 mm (4″) for low-speed equipment near quiet areas, and capacities beyond the standard range. We have supplied many.

    Up to 100 mm (4″) deflection · loads above 1,280 kg

    Ask us for a selection

Datasheets, installation guides and certificates Downloads

Selection

Free-standing, bolted down or made to order?

AVI-SAVI-BMade to order
FixingNone, stands on a rubber cupBolted through two holesAs designed
BaseRubber cupBottom plate on a rubber padAs designed
Deflection25 or 50 mm25 or 50 mmUp to 100 mm
Use whenEquipment that can stand freeEquipment that must be fixed to the floorLow-speed equipment near quiet areas, or loads above the standard range
Typical useCompressors, air handling units, fans, pumpsCompressors, air handling units, fans, pumpsLow-speed equipment near quiet areas

Rooftops and seismic zones

On a rooftop, wind pushes the equipment sideways; in a seismic zone, the earthquake does. An open spring holds neither. There the equipment needs a housed isolator that restrains it as well as isolating it.

Related productsSeismic Isolators Isolation and seismic restraint in one mount, for floor-mounted equipment on springs or rubber.
Close-up of an open spring isolator under a steel base frame

Related engineering services

Noise and Vibration Control Isolation design for equipment and mechanical rooms, sized to the criterion the project has to meet.Seismic Calculations for Equipment Anchorage and restraint calculations for floor-mounted equipment, to the code the project has to meet.

Describe the equipment and where it stands.

We will select the isolator and size it to the load.

Contact us