Solar vacuum tube with new style

single target vacuum tube
.Certification: ISO9001-2000
.High efficiency and reasonable price
.OEM offered
.Warranty:15years
solar collector features:
1). highly efficient absorber, daily average efficiency over 50%
2). can be used all years round in the climate
3). low heat loss
4). stable coating plating technology
5). high heat resistanceand high cold resistance

Tube structure
All-glass double-tube co-axial structure
Glass material
Borosilicate 3.3glass
Outer tube diameter and glass thickness
Φ=47±0.7mm &=1.6mm ±0.15mm
Φ=58±0.7mm &=1.6mm ±0.15mm
Φ=70±0.7mm &=2.0mm ±0.15mm
Inter tube diameter and glass thickness
Φ=37±0.7mm &=1.6mm ±0.15mm
Φ=47±0.7mm &=1.6mm ±0.15mm
Φ=58±0.7mm &=1.6mm ±0.15mm
Tube length
1200mm,1500mm,1600mm, 1800mm,1900mm ,2000mm , 2100mm
Absorber coating
Coating material
AL-ALN
Sediment method
Single Targets magnetron sputtering plating
Absorptivity
a:0.88~0.90(AM1.5)
Emittance
ε≤7.5% (80°C±5°C)
Vacuum degree
P ≤5.0×10
-3
Pa
Transmittance of glass tube
T ≥0.89(AM1.5 ISO9806-1:1994)
Stagnation parameter
Y ≥200 m²°C/kw
Average heat loss
ULT:0.65~0.75W/(m²*°C)
Hail resistance
Φ25 mm
Pressure-endure
0.6 Mpa