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The MB Series are elastomer shock and vibration isolators used under HVAC, power generation  and electrical equipment where a seismic design is required. At maximum rated load, the natural frequency range of 12 to 15 Hz offers excellent isolation of structure-borne noise. 

The MB Series are also furnished as a complete assembly and feature a built-in leveling device for simple installation. The MB1 and MB3 housings are made of heat-treated cast aluminum, while the MB5 is manufactured from welded steel. All hardware consists of zinc-plated, carbon steel for superior strength and long-life.

The elastomer element resists oils, ozone and most solvents - providing optimum resilience in even the harshest environments. the MB Series works well in mechanical equipment rooms or on outdoor equipment platforms. The operating temperature of -20°F to +180°F offers continuous operation in ambient conditions.

Features & Benefits

  • Static load range from 30 to 1300 lbs. offers a wide range of application flexibility
  • Cast aluminum housing and carbon steel hardware provide durability in harsh environmental conditions
  • Natural frequency of 12 to 15 Hz at maximum load provides structure-borne noise attenuation in even the most challenging applications
  • Designed for seismic applications
  • Isolator shipped as a complete assembly for ease of installation
  • Built-in leveling device offers simplified equipment installation
  • Available with longer bolt for height adjustable installation


  • Air handling units
  • Fans
  • Pumps
  • Chillers
  • Air compressors
  • HVAC equipment
  • Power generation
  • Electrical transformers
  • Motors




The engineers we employ hold the highest industry-recognized credentials in structural analysis, elastomer development and system dynamics.


We are the first ISO accredited PCA ISO-17065, third-party certification body for special seismic certification of non-structural building components and their mounting configurations by the ICC’s International Accreditation Service.

Test & Measurement

We are the only ISO 17025:2005 Accredited Seismic Simulation Test Laboratory with a triaxial shake table owned and operated by California licensed Structural engineers.