3.3 borosilicate glass evacuated tube

new tri-element vacuum tube,which is the core technology behind the solar water heater.

210cm vacuum tube assimilate the advanced 12 layers of spattering deposition of trivalent element technology to make the tube has high performance of absorptance and low reflection ratio. It also can stand up to high temperatures and perform a strong heating ability. And improve the deposition layer's structure

through add rare metal to enhance the effect photosensitive reaction, the absorbing rate of vacuum tube up to 0.96. Absorbing rate can be raise over 16% than 180cm vacuum tube. So it can be heat if cloudy.

Specification of all-glass Evacuated Solar Collector Tubes

1). Structure: all glass concentric dual tube geometer

2). Glass material: borosilicate glass

3). Absorptance: >0.92

4). Emittance: <0.08 (80°C)

5). vacuum: <5*10-3 Pa

6). Stagnation >230m2.°C/KW

7) average heat loss: <0.8w/ m2.°C

8). Lifetime >15years

3.3 borosilicate glass evacuated tube