glass vacuum heat collection tube,solar heat collecting tube ,evacuated tube solar collector

1.Vacuum Tube

   1).External pipe diameter :47mm/58mm/70mm

       Internal pipe diameter:37mm/47mm/58mm

   2).Thickness:1.6mm/2.0mm

   3).Length:1500mm/1600mm/1700mm/1800mm/1900mm/2000mm

   4).Material:high borosilicate 3.3 glass.

   5).Pass The Quality Supervision and Inspection

 2.HuaLi Solar Collector Features

   1).Highly efficient absorber ,daily average efficiency over 50%

   2).Can be used all years round in the climate

   3).Low heat loss

   4).Stable coating plating technology

   5).High heat resistanceand high cold resistance

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