Take care of the HVAC equipment with suitable vibration isolators

Most of the tall buildings, skyscrapers, malls, office complexes, hotels, hospitals, and industries have the Heating Ventilation and Air Conditioning systems installed. Keeping in mind the vagaries of the temperature, it is almost essential to have the HVAC systems in

vibration isolators

vibration isolators

order to have the business progress smoothly. The HVAC systems are both voluminous and bulky and come with a number of moving parts. When the installed systems are running you can hear the noise that the equipment makes. There are a huge amount of vibrations generated which if unchecked can pollute the working environment in the building.

The vibration isolator design: The government regulations require that the HVAC equipment is placed on top of the building. The vibration isolator pads for HVAC equipment come in handy for such installations. The vibration isolators consist of an elastomer element that is bonded to a metallic plate or stud on which the HVAC equipment is mounted. The vibration eliminator HVAC is selected based on the load and deflection parameters. It is called a vibration eliminator as it does not allow the vibrations to pass from the moving parts to the floor or to the surrounding support structure. The vibrations are absorbed by the rubber element and the energy is dissipated into the atmosphere as low-grade heat.

Environmental protection: The choice of the elastomer material in the vibration eliminator HVAC is chosen based on the environmental conditions in which it has to perform. For neat and clean environments within the rooms and chambers, simple rubber compounds are suitable. However, for exposed environments like rooftops and industrial floors with oil and water, it is recommended to go in for neoprene vibration isolators. The metallic part can be galvanized or powder coated as per the customer requirements and the environmental conditions. For small air conditioners the vibration isolators are available with a threaded insert enclosed in a neoprene mounting pad. The air conditioner feet can be placed on the neoprene rubber mounts and tightened with screws.

Hanger arrangement: In many installations, it becomes necessary to suspend the HVAC equipment and ducting from the ceiling but above the false ceiling. This area lies directly on top of the working areas and needs a very good vibration control. The spring vibration isolators HVAC are the right choice for such applications. The vibration spring isolators

seismic isolation

seismic isolation

consist of rectangular metallic sheet housing with elastomer elements and a spring with a cap. The vibration isolator spring housing is suspended from the ceiling by using a wire or rod. The metal to metal contact is avoided through a rubber washer.  The ducting or equipment is suspended from a stud that passes through the hole in the spring isolator bracket, the bonded elastomer element and the spring. The stud is tightened with a nut on top of the spring cap.

Work concept of the isolator: The spring gets compressed under the weight of the HVAC equipment, while the elastomer element ensures that the vibrations do not pass on to the metallic suspension and the support structure. In the case of shock or excessive vibrations the vibration isolation spring is assisted by the deflection characteristics of the elastomer element. The spring vibration isolators HVAC are available as single and double deflection types to suit the desired customer requirements. Some vibration isolators are supplied with the springs in the pre-compressed condition from the factory itself. A scale is provided on the inside of the rectangular sheet metal bracket on which the deflection reading can be easily read.

Flexible arrangement: The hole at the bottom of the vibration isolator spring bracket is quite large and allows for a 30-degree arc variation. This allowance takes care of the construction errors which at times can cause problems in the installation process. Thus, the spring vibration isolator HVAC is a versatile hanger for use in the installation of the HVAC equipment.

Andre HVAC International Inc. has been in the field of HVAC vibration damping and isolation right from its inception year 2003. The range of products is very large and allows you to make a selection based on the load bearing capacity and deflection characteristics. The environmental conditions and space constraints also play an important role in the product selection. AHI also helps its clients by providing them with customized solutions wherever the need arises. Product catalogues and specification sheets are available on the website and on request in case the data is required by the client.

Spring isolators are the effective anti-vibration tools for suspended equipment

All modern buildings, malls and industrial complexes make use of the spring isolation hangers for suspension of equipment associated with HVAC, fluid transfer, and any other moving parts. The rotating and reciprocating parts generate vibrations which are transmitted to the surroundings and structural members. It is the spring type vibration isolators that dampen these vibrations and prevent the transmission to the supporting structure or piping. The spring deflects against the load both in the static and dynamic conditions and the elastomer element absorbs the vibrations.

Spring hangers for pipe: All metals have a coefficient of thermal expansion and hence they expand when heated. The metallic pipes which are used to transfer fluids in an industry will undergo expansions and contraction depending on the temperature of the fluid that they carry. If the pipes are put on rigid supports they are likely to be damaged and deformed permanently because they are unable to absorb the force exerted by the pipe when it expands. The variable spring hangers, on the other hand, absorb these forces through deflection of the spring. Also, the spring hangers for pipe allow for an angular movement of 30 degrees from the support point. The pipe thus gets the freedom to expand without much restriction and comes back to its original position when it contracts on cooling.

  • The spring hanger for pipe comprises a steel housing, high deflection spring, and an elastomer element.
  • The riveted plate on the vibration hanger carries the pre-set factory values.
  • The installation position is indicated on the travel scale.
  • The hanger spring’s travel scale also indicates the hot and cold positions. The deflection that happens due to the weight of the pipe in the normal state is called the cold position. The vertical displacement of the pipe when it is carrying the fluid in the hot condition is earmarked as the hot position.
  • The marking is done through blocking pieces which can be removed and reinserted in the position as per requirement.
  • Adequate corrosion resistance is provided by galvanizing the vibration isolation hangers.

Spring isolators for HVAC:  The heating ventilation and air conditioning equipment and its ducting is almost an essential part of the residential and commercial buildings, industrial complexes and malls etc. As per the regulations, the air conditioning equipment is required to be put on the top of the buildings. The air conditioners and air handling units etc. can be mounted using the vibration damping mounts. These are simple elastomer pads with threaded metallic inserts where the equipment can be mounted and bolted in position. In case the air conditioner is to be suspended from the ceiling the spring isolators for HVAC can be used.

The ducting for the HVAC is spread to the various floors in the building and is normally concealed in the false ceiling of each floor. Since the ducting is attached to the HVAC equipment, the vibrations from the moving parts are transmitted to it as well. The spring vibration isolators HVAC become an important tool for preventing vibrations from getting transmitted from the ducting to the supporting structure. In the absence of spring isolation, the noise generated by the vibrating ducts and supporting structure would pollute the working environment.

The structure of a spring isolator: The spring vibration isolators have a simple structure. A metal strip is bent to form a rectangular housing. The housing is attached to the ceiling or support through a rod. The elastomer element prevents the metal to metal contact and dampens the vibrations. The material of the elastomer is weather resistant and can withstand harsh environments also if required. The spring vibration isolators allow for certain construction anomalies by accepting 30-degree variation in the suspension rod. This is possible because of a large diameter hole in the bracket. The spring element deflects based on its load bearing capacity and the spring isolation hangers are rated accordingly. In general, the springs are rated for one-inch deflection.

Andre HVAC International Inc. is in the field of anti-vibration products for more than a decade. It caters to the specific requirements of the clients by providing them with the right kind of solutions. A wide variety of spring hangers is available to suit the requirements of the clients for their HVAC and utility piping suspension requirements. The products perform to the client’s satisfaction and require the minimum maintenance. Support is available for making the right selection of the anti-vibration products for all your needs.