Glas-Vakuum-Röhre

Glass vacuum tube The technical parameters of glass vacuum tube Strucure All-glassconcentricdualtubegeomer Glassmaterial Borosilicateglass Outertubediameterandthickness Φ=47±0.7mm&=1.5mm Φ=58±0.7mm&=2mm Φ=70±0.7mm&=2mm Intertubediameterandthickness Φ=37±0.7mm&=1.5mm Φ=47±0.7mm&=1.6mm Φ=58±0.7mm&=1.6mm TubeLength 1200(±5mm)1500(±5mm) 1700-1800(±5mm) 2000(±5mm) Absorbing coating properties Configulation 1200(±5mm)1500(±5mm) 1700-1800(±5mm) 2000(±5mm) Mothodtodeposition GradedA1-N/A1solarselectuveabsorbingcoating absorptance as0.88-0.93 Emittance Σn:-.08-0.04 Vacuum p≤2×10-3 Stagnationparameter 250M2C/KW Sloarredianceexposureforobtainingapresetwatertemperature 2.8MJ/M2 Averageheatlosscoefficient 0.8W(M2C) Lifetime 15years