It is a kind of metal duct designed and produced to offer an excellent acoustical and thermal function for hvac ductwork applications.
Double wall spiral duct dimensions.
Air distribution corporation spiral duct and fittings are manufactured in accordance with applicable smacna ashrae and spida standards.
Roll formed continuous interlocked pipe.
Wonder flange rings are fused together at the factory and arrive at the jobsite ready for mounting.
Biyang double wall spiral duct is made of big spiral duct outside insulation in the middle and small spiral duct inside.
K value is 0 27.
Dual wall double wall insulated spiral is available with solid or perforated liners.
Gauge schedule size dia.
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.
Spiral double wall duct size pipe outer wall size inner wall positive pressure to 10 w g.
The outer wall performs as the pressure shell and will be constructed and sealed for the appropriate pressure class.
Duct direct 8610 wallisville rd.
E z flange with barrel clamp 26 to 96 diameter.
For these cases the inner liner does not project beyond the outer shell x 0 inches and a slip fit.
Dual wall duct sizes are listed using the inside diameter.
Mild steel is the standard material.
Flame spread 25 and smoke developed 50.
Houston texas 77029 phone.
Surface burning characteristics are.
Galvanized and ss are available.
713 672 0509 toll free 877 774 duct 3828.
Biyang double wall spiral duct is also named dual wall spiral pipe double wall round duct and double wall insulated duct.
Dual wall duct is also available in 2 3 and 4 thickness.
Fittings 3 12 26 14 24 24 26 36 22 38 48 20.
Wonderflanges can be used on 1 2 3 or 4 double wall spiral pipe and fittings.
1 2 and 3 insulation thicknesses are available.
Uni gasket fittings are compatible and available with all of mcgill airflow s round double wall duct types in 1 inch increments for 5 through 12 inch diameters outer shells and in 2 inch increments in 14 through 24 inch outer shell diameters.
Ft f at 75.
Spiral pipe 3 16 26 18 26 24 28 40 22 42 50 20 52 84 18 gauge schedule size dia.
This insulation has thermal conductivity of 0 26 btu in hr.
