High Quality Solar Collector Tube:
1.high-activity: solar spectral absoprtion increased 14%,reflectance reduced by 30-40%
2.high heat conductivity:Heat-resistant 200°C or so, anti-Alpine, minus 3 °C can keep heating.

3.high vacuum:Vacuum maintained against decay, improve performance and stability,and long time warranty to 15years. 

certification: ISO, CE,CCC

Three-high Solar Tube technology:

Material                       apply for high 3.3 borosilicate glass

Models                         Φ47/Φ58/Φ70

Structure                      all-glass-coaxial double-layer tubes

outer tube diameter     47±0.7mm &=1.6mm

                                     58±0.7mm &=1.6mm

                                     70±0.7mm &=2.0mm

inner tube diameter      37±0.7mm &=1.6mm

                                     47±0.7mm &=1.6mm

                                     58±0.7mm &=2.0mm

Length:     800/1200/1500/1600/1800/1900/2000/2100mm.

Absorptance                 0.93~0.96

Emittance                     0.04~0.06(80°C ±1.5°C)

Transmittance of outer tube   0.91

Stagnation temperature(height)   280~300°C

Pressure-endure           1Mpa

Stable advanced coating up to 380

Main Advantages of SG Collector Tubes: 

1.No scaling

2.No blasting

3.water-tight

4.Anti aging

5.low temperature-resistant

6.high temperature-resistant

7fast heat transfer

8.high heat conductivity

9.bearing pressure

 We can also provide products as your request.