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Flexicraft rubber duct expansion joints are available in round and rectangular configurations in virtually any size. These duct expansion joints allow different movements in low pressure gas services up to 250F for Neoprene, 300F for Butyl & EPDM, and 400F for Viton. They are often used as flexible fan connectors.
These high quality designs are molded with no splices, and incorporate metal backing rings on the flanged connections. The movements are listed for the "U" style and the arch style, which vary by the face-to-face length. All designs absorb vibration and noise very well, and have low spring rates.
Flange drilling suggestions are shown, and any special drilling is easily accommodated. The integral rubber flange acts as a gasket.
See the pdf submittal sheets for more details.
Metal bellows expansion joints, and belted fabric expansion joints, are also offered for duct systems.
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