Solar water heating

1. Inner tank: SUS304-2B food grade stainless steel,0.4mm
2.Outer tank: Color Steel with anti-corrion layer.
3. Heat insulation layer: Imported PU(thickness: 55mm).
4. Vacuum tube:58mm*1800,Three target,1.6mm
5. Frame(Stand):Galvanized steel with Paint,1.5mm. 25 degree optional.
6.Working Temp.: minus 20 to 260 celsius degrees
7. Working pressure: less than 0.3Mpa