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VIBRO ISOLATOR VRSIH
VIBRO ISOLATOR VRSIH

VIBRO ISOLATOR VRSIF

These high-deflection, free-standing spring isolators feature large-diameter, laterally stable steel coils that are unhoused and engineered for optimal performance. Each spring assembly is integrated into a robust upper load plate with a precision leveling mechanism to ensure consistent load distribution and ease of installation.

  • Light-Duty Configuration: For lower load capacities, the isolators are equipped with molded neoprene bottom load plates, offering effective vibration damping and acoustic isolation.
  • Heavy-Duty Configuration: For higher load applications, the steel springs are securely welded to a heavy-gauge steel bottom load plate. A neoprene isolation pad is bonded to this plate to enhance vibration attenuation and reduce structure-borne noise.

Technical Features and Performance Criteria:

    • Spring Geometry: The ratio of spring diameter to compressed height under rated load is maintained at a minimum of 0.8, ensuring lateral stability and consistent performance.
    • Corrosion Protection: Springs are finished with an epoxy powder coating, tested to withstand up to 1000 hours of salt spray exposure for enhanced durability in harsh environments.
    • Acoustic Isolation: A neoprene friction pad is incorporated to act as a sound break, effectively minimizing the transmission of high-frequency vibrations.
    • Vibration Isolation Efficiency: The system achieves a vibration isolation efficiency exceeding 95%, making it suitable for sensitive equipment and noise-critical installations.
    • Structural Integration: Bottom plates are pre-engineered with bolt provisions to facilitate secure anchoring to the supporting structure.
    • Stability Assurance: Lateral stiffness of the spring assembly is designed to exceed 1.0 times the rated vertical stiffness, ensuring reliable performance under dynamic loads.
    • Overload Capacity: Each spring unit is rated to accommodate a minimum of 50% overload beyond its nominal load capacity. Springs are structurally safe even at solid height compression.
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Description

Description

What Spring Isolators Do Under Heavy Equipment

Low-frequency vibration from large rotating equipment is difficult to control with rubber alone — it needs something with more give. Spring Isolators use a coiled steel spring to absorb that low-frequency motion, isolating chillers, pumps, and generators from the floor beneath them far more effectively than elastomer isolators on heavier loads.

The spring's deflection range is really the key figure here. A spring that compresses too little under load barely isolates anything; one properly matched to the equipment weight handles the job as intended.

Selecting Spring Isolators by Load and Frequency

Spring Isolators are typically specified by load capacity and natural frequency rather than a single generic size, since a mismatch in either direction reduces effectiveness noticeably. Housed spring designs also protect against side-to-side movement on taller equipment, which open springs alone don't fully control.

VRSIF shall consist of free-standing, large-diameter, laterally stable steel springs with a lateral stiffness greater than the rated vertical stiffness and designed to support a minimum overload capacity of 50%. Springs shall be assembled between top and bottom load plates, with the upper plate incorporating leveling bolts, locknuts, and washers for equipment attachment. Bottom plates shall include non-skid noise isolation pads and provisions for bolting to the supporting structure. Where required, isolators shall be housed in fabricated steel, with vertical restraints, neoprene snubbers, or internal pads to limit movement and prevent metal-to-metal contact. All housings shall be corrosion-resistant, either powder-coated, electro plated, or galvanized. Spring elements shall be powder-coated and rated for salt spray resistance when non-welded, and all springs shall be color-coded or otherwise marked for load identification. Springs shall be selected to provide the static deflections indicated in the Vibration Isolation Schedule or project documents.

VRSIF spring mounts are engineered to eliminate structural noise and vibration transmission from floor-mounted mechanical equipment into the building structure. These mounts are particularly effective in isolating low-speed machinery, where vibration and noise can otherwise propagate through structural elements, leading to discomfort, equipment wear, or acoustic interference.
When properly selected and installed, VRSIF spring isolators provide the highest level of assurance in mitigating destructive vibration and structure-borne noise. Their design ensures optimal performance across a wide range of operating conditions, contributing to both equipment longevity and occupant comfort.
Applications and Vibration Control Capabilities: VRSIF spring mounts are highly effective in controlling both high-frequency and low-frequency vibrations generated by rotating and reciprocating components. Typical applications include:
  • Rotary Equipment: Pumps, rotary wheels, and propeller-driven systems
  • HVAC Systems: Packaged air handling units, air conditioning modules, and fan coil assemblies
  • Fan Assemblies: Centrifugal and axial fans operating across varied speed ranges
  • Compressors and Engines: Reciprocating chillers, air compressors, and internal combustion engines

These isolators are designed to accommodate the dynamic characteristics of each equipment type, ensuring stable support while effectively decoupling vibration energy from the building structure.

  • Significant reduction in structure-borne noise and vibration
  • Enhanced equipment performance and reduced mechanical wear
  • Improved acoustic environment for sensitive installations
  • Versatile application across a broad spectrum of mechanical system

FAQ

Are spring isolators better than rubber isolators for all equipment?

Not universally — springs excel with heavy, low-frequency vibration, while rubber isolators are often simpler and sufficient for lighter equipment.

Do spring isolators need periodic adjustment?

Some designs include leveling bolts that should be checked after initial settling, particularly in the weeks following installation.

Can spring isolators corrode over time?

Yes, especially in humid or coastal environments, which is why housed or coated spring options are often specified regionally.

Related products

VIBRO ISOLATOR VRSIH

VRSIH Housed Spring Isolators are high-performance vibration control units designed to deliver substantial deflection while maintaining structural restraint. Each unit incorporates large-diameter, laterally stable steel springs housed within a fabricated steel enclosure to prevent excessive movement and ensure safe operation under dynamic, seismic, or wind-induced conditions.

The spring assembly sits between precision-engineered top and bottom load plates. The upper plate includes integrated leveling bolts, locknuts, and washers for accurate equipment alignment and secure attachment. The bottom plate features a non-skid neoprene isolation pad and bolt provisions for anchoring to the supporting structure.

VIBRO ISOLATOR VRSIR

VRSIR Restrained Spring isolators are designed to deliver high-deflection vibration isolation while incorporating structural containment features that prevent excessive movement under dynamic or seismic conditions. These units utilize large-diameter, laterally stable steel springs housed within a rigid frame that limits vertical and horizontal displacement, ensuring safe and predictable performance in demanding environments. Each spring assembly is integrated into a heavy-duty upper load plate with a built-in leveling mechanism, allowing for precise load distribution and simplified installation. The restrained design ensures that the spring remains securely seated throughout its operating range, even under transient or overload conditions.