vacuum tube

All glass solar vacuum tube performance and specification:

Structure:  All glass concentric dual tube structure

Glass material      : Borosilicate glass     

Outer tube diameter and thickness:   58±0.7mm/ 2.0mm     

Inner tube diameter and thickness:  47±0.7mm; 1.6mm

Length of tube     1800(±5mm);     

constructionGraded AL-N/AL selective absorbing coating

Heat-absorbing rate    >91% 

Emission of heat  <8%(80)

Vacuum degreeP<5x10-3 Pa

Solar radiance exposure    ≤2.8MJ/M2                                                        

Calories absorption9.1MJ/M2      

Average heat loss ≤8.6W/(M3.K)

Pressure-endure ability: 1Mpa

Bearing hailstone ability: hailstone diameter 25mm.

Lifespan: 15 years   

Feature:

A.      Working all the year round regardless of the weather, because when it comes upon rainy days, the electrical equipment will come to handy.

B.      High resistance to the wind, hail and severe temperature

C.     High efficiency of heat absorption because the coating layer in the tube can absorb as much heat as it can.

D.     Because of the thick insulation layer(polyurethane foam), water in the tank can be kept as long as 72 hours and still can be used for showers and it will still be warm after 100 hours.

E.      High quality stainless steel inner tank and the entire body are anti-rust.

F.      Silicon rubber seal: no poison, no smell and can keep water clean and can resist high temperature.

G.     Full automatic. Computer managing system, easy to use..

H.      Mineralizing water by anode dirt cleaning system.