Description:
TD-Duct it is a sandwich panel composed of a layer base from good fire retardant rigid polyurethane foam covering both side with aluminum foil.

Specification:
Thickness of panel: 20mm
Density of polyurethane: 52 +/- 2 Kg/m³
Compressive strength: 200N/mm²
Thermal conductivity: 0.021 W/m.°C
Flame retardant: B 1
Friction coefficient: 0.0135
Weight: 1.46 Kg/m²

Working temperature: -60 - +80.°C
Humidity: 0 - 100%
Pressure in duct max: 2,000 Pa
Air flow max: 12 m/s

Comparison of Properties 

Specification	TD Pre-insulated duct	Conventional duct
Common Thickness	20 mm	30,40,50 mm
Thermal Conductivity	0.021 W/M.K	0.0328 W/M.K
Apparent Density	52 +/-2 Kg/m3	16-24 Kg/m3
Whole weight	1.46 Kg/m2	12 Kg/m2
		(Including iron sheet)
Void structure	Closed void rate: 99.5%	Opened Void
Working Temperature	-60℃ - +80℃	+7℃ - +300℃
Appearance	Beauty	Worse
Manufacture & montage	Simple	Complicated
Air seal	Equipped with special	Standard flange without
	flange & sealant	sealant
Acoustics	Reduce break out noise	Non reduce
Safety & regulation	Fire grade: B1	Fire Grade: A
Air quality & hygiene	Anti bacterial coating on	Non coating, poor
	aluminum foil
Life Span	20 years	6 years
	Corrosion resistance	Corrosive