glass vacuum tube

الوصف

Advanced technology: Multi-layer magnetron sputtering gradation aluminum-nitrogen/aluminum sum selective absorption coating improve the heat collecting efficiency of high vacuum tube Well material: Vacuum tube is made of 3.3 high boron silicon glass tube that satisfies QB/T******9(idt) ISO********8 standard, with high transmittance, well cold and thermal shock resistance and strong optics stability Quality Assurance: Strictly follows the national standards GB/T*********7 starting from raw material purchase to finished products, all the employees cooperate well and never allow any faulty products Performance parameter of the vacuum tube High collecting efficiency:magnetron sputtering gradation aluminum-nitrogen/aluminum sun selective absorption coating , solar absorptance≧0.*3, heat emissivity≦6%, less heat loss and good heat preservation, Good Thermal Efficiency Hail Resistance: ≦Ф*5mm Working Pressure:0.6Mpa Working Life≧*5 years