solar vacuum tube

solar vacuum tube Sizes: 47*1500mm 47*1800mm 58*1500mm 58*1800mm Coating Colour:black or blue Kingeagle vacuum tube adopt dry absorb type selective coating with lower remittance,is solved the probles of normal tube having not good curve of emittance,when the temperature higher,the remittance higher,which reduce the efficiency of the tube. Three Higher Points of this new tube: 1,Higher efficiency:The absorbance increased by 14% with remittance reduce by 30-40% 2,Higher heat conduction:dry exposure temperature up to 270 C and can endure -30 C environment temperature and still working 3,Higher vacuum degree:unique technoloty to keep the vacuum degree,stable absorbance which grarantee the long life of the tube Customized is welcome