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Introduction: Feature: High efficiency heat focus vacuum tube is made by the newest nanotechnology ,its absorb floor is made from copper, stainless steel and aluminium by the 12 -floor spatter plating technology. High boron silicon glass is chosen. By the gradually ss-c/cu selective complex coat, the vacuum tube have the high absorptance and low reflectance. The vacuum tube have the heat preservation effect because of its vacuum interlayer and its temperature can be up to 350 degrees. Specification:DY-VT A: Length 1500mm 1800mm Outer tube diameter 47mm 58mm Inner tube diameter 37mm 47mm Weight 1.3kg 2.2kg Glass thickness 1.6mm 1.6mm Material Borosilicate Glass 3.3 Borosilicate Glass 3.3 Absorptive coating Graded A1/N/A1 Graded A1/N/A1 Vacuum degree P<5*10 -3 Pa P<5*10 -3 Pa Thermal expansion 3.3*10 -6 /degree 3.3*10 -6 /degree Insolation Temperature >200 degrees >200 degrees Absorptance >93% >93% Emittance <8% <8% Heat loss <0.8W/(m2°C) <0.8W/(m2°C) Maximum strength 0.8Mpa 0.8Mpa Resist cold -35 degrees -35 degrees Resist hailstone 25mm 25mm Resist wind 30m/s 30m/s Start-up temperature <=25 degrees <=25 degrees
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