Kinetics Model SFH Fibreglass Spring Hangers are engineered vibration isolation hangers that combine a freestanding, large-diameter, laterally stable steel spring with a precompressed molded fibreglass insert inside a stamped or welded hanger bracket. This combination provides vibration isolation performance for suspended equipment and building services where both low-frequency vibration and higher-frequency noise control are required.

The SFH hanger is suitable for suspended mechanical equipment, low-speed suspended fans, pumps, ductwork, piping, and services located near mechanical equipment rooms. It is also used in high sound transmission loss ceiling systems, particularly where isolated ceilings are required to protect occupied spaces from mechanical room noise, aircraft flyover noise, or other predominantly low-frequency sound sources.

Model SFH hangers allow support rod misalignment through a 30° arc without short-circuiting. The spring element has a minimum lateral spring stiffness equal to 1.0 times the rated vertical stiffness, supporting stable hanger performance. The 1″ and 2″ versions also include Kinetics’ patented No-Short self-centering spring cap, designed to keep the rod and washer centered and reduce the risk of vibration short circuits.

For MEP consultants, acoustic consultants, HVAC contractors, and project developers in the UAE, GCC, Middle East, and MENA region, SFH Fibreglass Spring Hangers provide a technically reliable solution for suspended vibration isolation in noise-sensitive buildings. They are available in deflections from 1.04″ to 2.20″ / 26 to 56 mm and 4.05″ to 4.75″ / 104 to 112 mm, with capacities from 35 to 3850 lbs / 16 to 1747 kg.

Vibration isolators for suspended equipment with minimum static deflection requirement exceeding .4″ (10 mm), and where both high and low frequency vibration is to be isolated, shall be hangers consisting of a laterally stable steel spring in series with a precompressed molded fiberglass insert, complete with a load plate and assembled in a stamped or welded steel bracket.

The bracket shall be finished with an polyester powder coating. The manufacturer shall provide independent laboratory testing showing that the bracket with this finish has endured a minimum of 1,000 hours of exposure to salt spray fog testing per ASTM B117 without signs of corrosion.

The fiberglass insert shall be individually coated with a flexible, moisture-impervious elastomeric membrane. The insert shall be molded from glass fibers with fiber diameters not exceeding .00027″ (6.8 microns) and with a modulus of elasticity of 10.5 million PSI (738,223 kg/cm2).

Natural frequency of fiberglass vibration isolators shall be essentially constant for the operating load range of the supported equipment.

The spring element shall have a minimum lateral stiffness of 1.0 times the rated vertical stiffness.

Vibration isolators shall be color coded or otherwise identified to indicate load capacity.

The hanger bracket shall be designed to carry a 500% overload without failure and to allow support rod misalignment through a 30° arc without metal-to-metal contact or other short circuit.

The 1″ and 2″ hanger brackets shall incorporate spring caps with indexed steps which correspond to the washer diameter of appropriately sized hanger rod to keep the rod centered in the spring cap and reduce rod misalignment. The spring caps are protected under U.S. patent number 5,653,426.

Isolation hangers shall be selected by the manufacturer for each specific application to comply with deflection requirements as shown on the Vibration Isolation Schedule or as indicated on the project documents.

How the self-centering no short cap works:

Indexed steps in spring cap correspond to standard washer diameters for the appropriate rod diameter. The washer and rod stay centered in the cap. Featured on the 1″ and 2″ SFH Hangers only. Patent No. 5,653,426

The combination isolation hanger assembly with fiberglass insert shall be Model SFH, as manufactured by Kinetics Noise Control, Inc.