Tir-height vacuum tube

Structure: All glass concentric dual tube structureGlass material: Borosilicate glass Outer tube diameter and thickness: 58+/-0.7mm/ 1.6mmInner tube diameter and thickness: 47+/-0.7mm; 1.6mmLength of tube:1800(+/-5mm); construction:Graded AL-N/AL selective absorption coatingHeat-absorbing rate:>92% Emission of heat: <8%(80C)Vacuum degree:P<5x10-3 Pa Solar radiance exposure:<2.8MJ/M2 Calories absorption:9.1MJ/M2 Average heat loss :<8.6W/(M3.K)Pressure-endure ability: 1MpaBearing hailstone ability: hailstone diameter 25mm.Lifespan: 15 years Vacuum tubes assimilate the advanced 12 layers of spattering deposition of trivalent element technology, high borosilicate glass, gradual change of SS-C/CU selective complex absorptive coating and these make vacuum tubes have high performance of absorptance and low reflection ratio. Through the interlayer, vacuum has a unique effect of thermo, with its temperature up to 380 degrees of idle sunning, performing a strong heating ability Optional size: 47 x 1,500mm , 58 x 1,800mm, 58X2,000mm