5.4Spring/Elastomer Vibration Isolation Hangers
All models with HB-S-E, HC-S-E, and HD-S-E housing are heavy-duty spring vibration isolation hangers and incorporate a new design of the steel housing, with the base's two sides bent down, which considerably increases the rigidity of the housing's bottom plate under load.
These hangers have three elastomer parts. The top and bottom spring's rubber cups have vulcanized steel washers for even load distribution. The bottom cup has a locator rubber ring to center the cup and spring in the hanger's housing. The third part is an elastomer element with a rubber ring to center the element in the top opening in the housing frame. Depending on the load, different sizes and levels of hardness of the elements are recommended and available.
Spring vibration isolators/hangers for suspended equipment are used for fans, A/C, pipes, ducts, and other hanging structures and building services, as well as applications with critical requirements for vibration/shock isolation and noise reduction.
While choosing the hanger mounts type for vibration isolation following factors have to be considered: weight and type of equipment, frequency range of equipment and desired vibration isolation level as well as the environment where the equipment is operating. Each antivibration hanger consist of the spring designed for a certain load capacity range and it is important to choose the model accordingly.
Spring/Elastomer Vibration Isolation Hangers: These are more sophisticated hanger mount vibration isolators containing both, an elastomeric element with a built in metal washer on the top and a steel coil spring positioned at the bottom in the same housing. They offer dual protection against both low and higher frequency forces. Many building engineers are calling for these types of hangers to be installed in large mechanical rooms where different types of the vibrations can be present, namely low and high frequency. A good example of where this vibration isolator hanger is required is a base mounted pump where vibration from the mechanical devices is further amplified with the vibration produced by the water traveling through the pipes.
a) Rated load is the maximum load recommended.
b) Springs have additional travel to solid beyond rated load.
c) Hanger can withstand short-term impact forces.