タイトルまたは説明

High Quality Low Price Solar Vacuum Tube

Vacuum solar tube   is  the  key  component  of  the  solarwater heater.  Each  tube consists of two glass tubes.  The outer tubeis made of extremely strong  transparent borosilicate glass that is able to resist impact from hail up to *5mm in diameter. The inner tube is also made  of   borosilicate   glass,  but  coated  with  a  special  selective  coating,  which  features  excellent  solar  heat absorption and minimal heat reflection properties. The air is withdrawn (evacuated) from the space between the two glass tubes to form a vacuum, which eliminates conductive and convective heat loss. 

Technical Data
 

All-glass evacuated solar collector tubes technical data

 Specification: