Model | Glass vacuum tubes |
Glass Material | High-quality borosilicate glass 33 |
Thermal Expansion | 3.3x10-6 ℃ |
Glass Tube Diameter | ¢47mm / 58mm |
Inner Glass tube diameter | 37mm / 47mm |
Thickness of Vacuum | ¢5mm |
Length | 1500mm ,1800 mm |
Glass Wall thickness | 1.6 mm / 1.8mm |
Single Tube weight | 1.35kg ; 2.0kg |
High Vacuum, long-term stability | 5×10-3 Pa |
Absorber Material | Aluminum |
Absorptive Coating | Aluminum Nitride |
Absorption Coefficient | α 0.90-0.93 |
Wind Resistance | 30m/s |
Emittance | <8% (80℃) |
Heat Loss | <0.8W/ ( m2℃ ) |
Maximum Strength | 0.8MPa |
Freezing Tolerance | -30 ℃ |
Hail Resistance | ¢ 30mm hail |
Insolation Temperature | 250 ℃ |
Start-up Temperature | ≤25 ℃ |
Life Time (years) | 15 years |