Acoustic Flexible Connectors
Acoustic flexible connections (or acoustic expansion joints) are designed for both vibration isolation and noise attenuation; conventional HVAC flex connectors or flexible joints are inserted for vibration, not for noise attenuation.
When industrial duct systems are installed, an air mover is typically part of the design. Air movers, such as a stand-alone fan or a fan integral to a dust collector, air handling unit, or process equipment, can produce objectionable noise. This noise is typically addressed with an inlet or an outlet silencer. A forgotten noise source is the breakout noise from the inlet or outlet flexible connectors which connects the duct to the silencer, fan to the silencer or dust collector to the duct system.
Acoustic flexible connections (or acoustic expansion joints) are manufactured using a unique combination of materials to control airstream breakout noise. Depending on the application, the flexible inner wall is manufactured from high-temperature PTFE or rugged EPDM; acoustic media is then sandwiched between this inner wall and a tough outer acoustic barrier. Finally, everything is secured in place with two sets of heavy duty backing bars.
All of our acoustic flexible connections are acoustically rated with predictable and guaranteed noise attenuation levels. Depending on the fan noise spectrum, attenuation can be as high as 30 dBA.
For easy installation, our acoustic flexible connections are provided with pre-drilled flanges custom cut to match any existing connections. These flanges are backed with weld nuts and fitted with proprietary shipping braces that hold the unit to its proper length during installation.
Discuss your acoustic flexible connection needs with SysTech.