Wanbao solar vacuum tube adopts the advanced 12 layers sputtering new tri-element technology and selects high boron-silicon glass. Through SS-C/CU layer, the vacuum tube possesses high absorptance and low reflectance. Furthermore, with the interlayer, the vacuum tube has unique effectiveness of preserving temperature. The temperature without water can reach 300℃, and the heat system is powerful.

 

Features:

1) Typical Size: Φ47x1, 500mm / Φ58x1, 800mm / Φ70x2, 000mm

2) External tube diameter: Φ47+/-0.7mm, Φ58+/-0.7mm, Φ70+/-0.7mm

3) Internal tube diameter: Φ37+/-0.7mm, Φ47+/-0.7mm, Φ58+/-0.7mm

4) Thickness: 1.5mm+/-0.1mm, 1.7mm+/-0.1mm, 2.0mm+/-0.1mm

5) Tube length: from 1.2m to 2.1m

6) Glass material: borosilicate glass 3.3

7) Absorbing coating properties: AL-N/AL or Al N/Al N-SS/Cu selective absorbing coating

8) Absorptance: 0.92

9) Emittance: 0.07

10) Heat loss coefficient: ≤0.70W/(m²x℃)

11) Pressure-endure ability: 1Mpa

12) Bearing hailstone ability: 25mm

13) Lifespan: 15 years

14) Widely used for solar water heater

15) Packing: export carton