high quality china made non pressure solar water heater

(1) Specifications:
1.Outer tank:  colorful steel

2.Inner tank: SUS304-2B or 316 food-grade stainless steel  thickness≥0.4
3.Sealing Ring: Excellenrt Silica gel material. life is twice longer than common Silica gel.
4.Vacuum tuber: High-efficient  vacuum tube 
*High-Efficient heat-collection function: New generation of vacuum tubes, use molecular nanotechnology, greatly enhance heat-absorption by 20 percent, higher water temperatures.
*Adopts the international advanced film-coating technology, solar thermal conversion rates extremely high, absorbing heat even if the cloud weather.
*Vacuum tube strictly choose high-borosilicate glass 3.3 so that it has low coefficient of thermal expansion and higher intensity. Hail-resistance:25mm 
5.Insulation: 55mm polyurethane  keep heating  do with aging  the cell is small and uniform reasonable density excellent insulation
6.Frame: thicker galvanized steel , Anti-corrosive.and Anti-ultraviolet, installed in the slope and flat place freely.Strengthen hail-resistance. Angle:20-80 degree.Through oxidation process.It increase wind resistance.,life is longer than common frame.  Beautiful appearance. 
7.Automatic operation: Digital controller shows water temperature and water lever,water loading automatically ,heating automatically ,controlling automatically.

(2) Model

(3) How it works

1) The operation of the solar collector is very simple. 

2) Solar absorption: Solar radiation is absorbed by the solar tubes and converted into heat. 
3) Solar heat transfer: Heat pipes conduct the heat from within the solar tube up to the header pipe 
4) Solar energy storage: Water is circulated through the header, via intermittent pump cycling. Each time the water circulates through