Models:
47*150  
58*180

Weight:
1.35kg  
2.29kg

Structure  :
all-glass-coaxial double-layer tubes
all-glass-coaxial double-layer tubes

Outer tube diameter:
470mm  
58mm

Inner tube diameter:
37mm  
47mm

Outer tube thickness:
1.6mm  
1.8mm

Inner tube thickness:  
1.6mm  
1.8mm

Tubes length:  
1500mm  
1800mm

Material of coating:
al n/al n-ss/cu  
al n/al n-ss/cu

Absorptance:
0.94~0.96  
0.94~0.96

Emittance  :
0.04~0.06  
0.04~0.06

Vacuum:
p??5*10-3pa  
p??5*10-3pa

Transmittance of outer tube  :
0.91
0.91

Stagnation temperature (height):
270~300celsius  
270~300celsius

Heat-loss coefficient:  
??0.6w/ m2*celsius)  
??0.6w/ m2celsius)

Bearing hailstone ability:  
hailstone diameter 25mm  
hailstone diameter 25mm

Pressure-endure ability:  
1mpa  
1mpa