Baoguang tri-element sputtered coating solar vacuum tube,higher absorber performance,ideal for solar water heater and solar col

Baoguang tri-element sputtered coating solar vacuum tube,higher absorber performance,ideal for solar water heaters and solar collectors used in cold and low solar radiation region.

Tri-element Hitech vacuum tube performance and specification:

Standard size: 47/1500mm;47/1800mm;58/1800mm and 58/2000mm

Absorptivity:α =0.93~0.96 (AM1.5)

Emission: ε=0.04~0.06(80°C±5°C)

Stagnation temperature:260~300 °C

Life time: over 15 years

solar water heater vacuum tube