Vacuum Tube

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Vacuum Tube
Posting date : Dec 12, 2009
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84-
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Product specialty: Apply for two layers 3.3 high borosilicon glass tube The two layers glass tube, with same axis is vacuumized between them, the vacuum degree can reach 5x10-2Pa. Coated with AL/N/AL selective absorbing coating material High absorbing efficiency: The vacuum magnetic -control sputtering selective absorptive coatings on the heat-collecting plates has a high absorption coefficient of more than 93%, and the emission coefficient around 6%. Long life: The life span can reach 15 years. High practicability: Able to endure impact of hail less than 25mm in diameter with high heat efficiency throughout the year. Technical data table: Model type Φ47x1.5m Φ58x1.8m Outside-tube diameter Φ47 Φ58 Inner-tube diameter Φ37 Φ47 Wall thickness 1.5mm 1.5mm Length 1.5mm 1.8mm Outside-tube diaphaneity 0.92 0.92 Selective absorbing coating AL/N/AL AL/N/AL Absorbing coefficient 0.93 0.93 Reflective coefficient 0.06 0.06 Vacuum degree P≤5x10-2Pa P≤5x10-2Pa The highest temperature 250 250 Anti-impact capability ≤Φ25mm (hail) ≤Φ25mm (hail)

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