Double Wall Spiral Duct Specifications

Mylar barrier is available as a barrier between perforated liner and insulation. Smc constructs each piece with an inner shell perforated or solid surrounded by a layer of insulation and covered by a solid outer shell. In double wall round spiral duct a metal inner liner insures that high airflow velocities cannot separate insulation by pulling away from the duct s outer wall and creating erosion or airflow problems.

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Hvac Doublewall Spiral Pipes Fittings Smc

K value is 0 27.

Double wall spiral duct specifications.

Smc double wall round spiral duct is a dependable erosion resistant alternative to lined round spiral duct providing improved protection for insulation exposed to the airstream. Standard lengths of longitudinal seam k27 duct are 5 and 6 feet. Aluminum double wall flat oval duct and fittings are available in larger sizes and greater metal thicknesses on special order. Double wall flat oval duct and fittings are also available in carbon steel paintable galvanized steel and a luminized steel.

This requirement is applicable to 20 gauge or less in thickness and 3 w g. 1 2 and 3 insulation thicknesses are available. E z flange with barrel clamp 26 to 96 diameter. Double wall fittings are manufactured on our state of the art fabrication equipment.

Dual wall double wall insulated spiral is available with solid or perforated liners. These holes effectively channel system noise flanking noise and cross talk noise into the insulation layer where it is absorbed. All double wall fittings are fabricated with stiffening beads on duct sizes 19 wide and larger which have more than 10 square feet of unbraced panel. When noise reduction is required the inner wall of dual wall spiral pipe is perforated with thousands of 3 32 holes on 3 16 centers.

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