China solar vacuum tube

Baoguang tri-element solar vacuum tubes specification & advantages :

1. Advantage: the use of advanced coating technology magnetron sputtering. To ensure  the highest absorption rate of the tube coating

2. Higher thermal efficiency over 93% absorption rate.

3. The absorption layer of high temperature pipe, stainless steel (SS)instead of aluminum (AL),and more durable. 

4. "Interferometer coating " technoligy make our tubes very low emissive rate.

5.  Vacuum degree up to 10 (-4) level. 

6. Selective absorbing coating with high coverage, heat, insulation effect.

7. Super Anti-cold: advanced vacuum process, 450 high temperature for up to 60 minutes of strict exhaust, vacuum up to 5 * 10 (-4) Pa, cut off radiation convection heat, better resistance to cold, below zero 40 still work.

8. Long life, keep excellent performance for over 15 years.