Introducing the newest Seismic spring mount for effective vibration isolation

Seismic isolators offered by ANDRE HVAC International

ANDRE HVAC International has a wide range of seismic isolators to reduce the transmission of vibration and high frequency noise coming from a variety of applications and industrial machines like fans, HVAC equipment, piping, duct works and other industrial machinery. Our seismic spring isolators are designed in a way that helps limit the issue of vibration and noise while offering increased productivity, stability and most importantly longer life of the equipment. 

Seismic spring mounts, rubber seismic mount, and independent seismic restraints offered come in a complete range for various applications. In addition to this, ANDRE HVAC International offers cable restraints which are used with spring and rubber hangers for restraining of seismic affect on any suspended piping or any other equipment.

Variety of seismic mounts

Seismic spring mounts comes in different configuration that are captive, housed and snubbed for floor or stand mounted equipments. These seismic isolators are designed with special multi-directional and flexible restraint to limit equipment movement during sever seismic disturbance. Besides this, during the normal operation, the seismic spring mountings provide vibration isolation in case of equipment movement and displacement causing high frequency vibration.

  • Seismic spring mounts Seismic spring mounts are vibration isolators that limit vibration & restrain seismic forces that affect air handling units, fans, pumps, chillers and other applications that are installed in a seismic zone. These seismic spring mounts are ideal equipments for large application that are often subjected to external environmental factors like wind or seismic forces. The mounts offered are powder coated and galvanized for a long lasting life.  
  • Seismic snubber Seismic snubbers are the best and the most effective way of vibration and seismic control. This equipment is nothing but an open spring and seismic snubber combination that helps in limiting vibration and affects of seismic force on applications. During the normal operation these snubbers do not interfere in the working of the application. These equipments or snubbers are ideal solution for post seismic disaster wherein the application is required to be functional after a seismic event.
  • Seismic cable restraint Suspended applications that require restraints, seismic cables are an ideal option. These cable restraints require no training for installation, have welded options for attachment, and are well designed to withstand seismic forces at maximum rated load. 


Go in for seismic isolators and spring hangers for your buildings

Seismic restrained isolator: The seismic spring mounts consist of a metallic housing that restricts the vertical and horizontal movement of the supported equipment during a seismic impact. The neoprene elastomer element is fitted in series with the spring coil. It prevents the metal short circuiting between the supporting member and housing. The seismic vibration isolators are designed to withstand forces of 1G magnitude along the horizontal and vertical planes without any yield or failure. The seismic vibration damping mounts function normally as vibration isolators under normal operating conditions.

The features of the seismic spring isolator can be summarized as:

  • Restraint along all major axis with physical limits in the vertical direction
  • Free height and operating height are fixed
  • Adequate rust protection for steel parts and spring coils
  • Easy replacement of spring coils in the field

Seismic spring mounts: The floor mounted seismic spring dampers are used for indoor and outdoor equipment isolation. The welded housings in the seismic spring mount for

Seismic spring mounts:

Seismic spring mounts:

deflection, limit the lateral and vertical movement. The typical use of seismic spring isolators is for cooling towers, chillers, air handling units, and base-mounted fans. The seismic spring is epoxy powder coated while the steel parts are hot dip galvanized for a long service life. The seismic brackets are also used along with other seismic restraint products for better results.

Spring isolation hangers: The vibration hangers are housed in a stamped or welded hanger bracket. The color coded coil spring indicates the load and deflection characteristics of the spring hangers. The metal to metal contact is prevented by the use of a molded fiberglass insert or an elastomer element. The spring in the sound isolation hangers has lateral spring stiffness equal to the rated vertical stiffness. The spring hanger allows for support rod misalignment through a 30-degree arc.  The vibration hanger is suitable for isolation of low speed suspended mechanical equipment like fans and pumps etc.

Piping spring hangers: The anti-vibration hanger is recommended for use around critically quiet areas for the isolation of vibration and noise produced by suspended piping and

Piping spring hangers

Piping spring hangers

ductwork. The pipe support and hangers prevent the vibrations from getting transmitted to the supporting structure. The sound isolation hanger’s rubber absorbs the high-frequency vibrations while the spring takes care of the low-frequency vibrations. The spring hanger extensions and spring brackets are used in tandem with the pipe spring hangers for ease of installation and improving the performance of the isolation system. The swing hangers with spring link are used in the application where the fluid temperature causes the thermal expansion of the piping.

Andre HVAC International Inc. has been providing solutions to builders and designers for adequate seismic protection since it came into existence in 2003. It also has a wide range of products in the spring hanger pipe support and spring ceiling hanger segment used for acoustic isolation in buildings. AHI provides the support to the customers in the selection of the anti-vibration hangers and other seismic restrained isolators.

Seismic mounts and their application

Seismic mounts are mechanical equipment designed to combine spring mount vibration isolation with multi-directional flexible restraint to limit equipment movement under seismic disturbance. While under the normal working conditions, these mounting provides efficient vibration isolation that are equivalent to open spring mountings but, when subjected to Seismic mounts and their applicationphysical displacements such as those generated by seismic forces, equipment motion relative to the supporting structure is restricted. At the maximum restraint capacity of each mounting type the movement of equipment is limited to less than 12mm along the major axis.

There are a wide range of seismic spring mounts including rubber seismic mount that are used in various industrial applications. Also available are cable restraints, which are used in conjunction with spring or rubber hangers for the seismic restraint of suspended piping and equipment. So depending on type of machine in use and the deflection requirement, one can select the right seismic mount. When correctly selected, integrated seismic mountings will allow conformance to the design requirements of various applications and other International Seismic Codes.

While there are a number of seismic isolators available in the market is advisable to Refer to the Isolator Selection Guide to obtain the necessary static deflection and then accordingly select the seismic mount required according to equipment load. The dynamic factor needs to be taken into account for all RCMS seismic mounts. Seismic Mounts use high performance coil springs that make them effective at damping wide range of frequencies. The internal stoppers are strong enough to support structures during earthquake and strong winds. But for an effective impact it is critical to select the right seismic equipment.

Seismic mounts or isolators designed to restrain seismic vibration and impact are-:

  • The Rugged steel housing is designed to handle high wind and seismic forces.
  • The Housing serves as blocking during equipment erection.
  • These seismic equipment’s feature a top plate that may be welded or bolted to equipment; allowing flexible design options.
  • The Housing height of each series of equipment are identical within each series.
  • The seismic restrained spring isolators have easily accessible bolt holes that offer simplified installation.
  • These seismic restrained isolators are powder coated housings and springs offer outstanding corrosion resistance.
  • The springs of the seismic isolators are easily accessed for replacement if in case the loads change.
  • The spring mounts are Color-coded for proper identification of load capacity and simple inspection.
  • Also, featuring elastomeric acoustical cup allows the equipment for better vibration isolation.

Speaking of its application the Seismic isolators or seismic mounts are used in a various industries and installed in various industrial applications that include

  • Cooling Towers
  • Chilling Units
  • Buildings
  • Scaffolding.
  • Other General industrial equipment
  • HVAC equipment and fan assemblies
  • Pumps, chillers and cooling towers
  • Condensing units
  • Generator sets& many other such applications.




Important considerations for seismic vibration isolation

The seismic mounts and isolators are recommended for use with the mechanical equipment when it is subject to seismic occurrences, high wind loads and other external forces. The seismic isolators are pretty effective for noise and vibration sensitive areas when the mechanical equipment is located above or near it. The seismic spring isolators are very effective when the equipment for isolation experiences significant weight changes due to the fluid drainage during routine maintenance operations. The equipment that falls under this category is cooling towers, chillers and boilers etc.

The seismic vibration isolators consist of a welded steel housing that has a free standing, large diameter steel spring in the middle. The metallic housing has zinc metallization on it in order to protect it from corrosion.

Important considerations for seismic vibration isolation

Important considerations for seismic vibration isolation

The housings have elastomer members assembled which work in tandem with the spring member to provide the required damping effect. The housings are fabricated in such a manner so as to limit vertical movement of the isolated equipment. The vertical movement is generated if there is a reduction in load due to fluid drainage or increase in load due to large external forces like seismic events or high winds.

The top plate in the seismic spring isolator housing has threaded holes for anchoring the mechanical equipment. In certain situations, it becomes difficult to align the holes and welding is recommended. The snubbing element has the neoprene elastomer at its core. For heavy duty applications, the seismic vibration isolators have elements which can accommodate directional snubbing also.

Andre HVAC International Inc. provides the entire range of seismic spring isolators and seismic spring mounts for the mechanical equipment. They also help in carrying out computer studies for snubbing systems in earthquake and bomb blast zones. The HVAC vibration isolation solutions from Andre HVAC are guidelines that provide general seismic details for suspended piping, ductwork and electrical systems. There are special seismic mounts and independent seismic restraints for the HVAC applications. With the help of these mounts, you can secure the air-conditioning equipment, fans, ducts etc. to the building. The cable restraints also come quite handy for restraining the suspended pipe and equipment. The seismic spring mounts thus provide adequate protection from the seismic activity.

Thereis a variety of mounts available which primarily consist of a spring and an elastomer- neoprene. There are also wire rope and pad type vibration mounts and isolators. The seismic mounts comply with IBC regulations. The Amber booth vibration isolators have been used in HVAC, defense, transportation and OEM market for over 60 years. Amber booth is a member of the American society of heating, refrigerating, and Air-conditioning engineers, Inc. and Vibration isolation and seismic control manufacturers association. Andre HVAC International Inc. brings to you the entire range of Amber booth products to meet your specific requirements.

The seismic spring mounts are color coded to indicate the spring deflection and the load capacity. To meet the seismic code compliance, a spacer block is provided for the air gap setting. The Andre HVAC seismic spring isolators are designed to counter the seismic forces up to a value of 2G.