Solar Energy Vacuum Tube (BNVT-200)

* Models: Ф58 X 210

* Weight: 2. 67kg

* Structure: All glass coaxial double-layer tubes

* Outer tube diameter: Ф58mm

* Inner tube diameter: Ф47mm

* Outer Tube thickness: 1. 8mm

* Inner tube thickness: 1. 6mm

* Tubes length: 2100mm

* Material of coating: AlN/AIN-SS/CU

* Absorptance: 0. 94~0. 96

* Emittance: 0. 04~0. 06

* Vacuum: P≤5 X 0-3pa

* Transmittance of Outer Tube: 0. 91

* Stagnation temperature (height): 270~300℃

* Heat-loss coefficient: ≤0. 6 w/ (m2*℃)

* Bearing hailstone ability: hailstone diameterФ25mm Pressure-endure ability: 1MPa