It apply the technology of Three-target Magnetron Sputtering ,it has the advantage of High absorption,High efficiency ,High temperature .The material of  the glass can stand impact from the outer surrounding ,the age of the coating can up to 10 years more.

Glass mmaterial: borosilicate 3.3

Coating structure: SS-ALNx/Cu

Model: Φ120-1000mm

Color: Blue, Violet gold

Vacuum degree: P≤4.2×10-3(Pa)

Solar absorption efficiency: α=0.91-0.93(AM1.5)

Absorptivity emissivity ratio: εh =0.04-0.06(80°C±5°C)

The temperature of basking without water: Y=260~310 m2 °C / KW

Average heat loss coefficient: :ULT=0.4~0.5W / ( m2°C) 

Diametre 120mm solar vacuum tube