Detailed Product Description

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)