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solar water heater vacuum tube (58mm---1800mm)
solar water heater vacuum tube (58mm---1800mm)

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solar water heater vacuum tube (58mm---1800mm)
certificates: ISO9001:2000, CE
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solar water heater vacuum tube   (58mm---1800mm)



All-glass double-tube co-axial structure

Glass material

High borosilicate 3.3 glass

External pipe diameter and thickness

Φ=47±0.7mm  &=1.6mm Φ=58±0.7mm  &=1.6mm

Φ=70±0.7mm  &=2.0mm

Internal pipe diameter and thickness

Φ=37±0.7mm  &=1.6mm Φ=47±0.7mm  &=1.6mm

Φ=58±0.7mm  &=1.6mm

Pipe length

500mm 850mm 1200mm 1500mm 1600mm  1700mm 1800mm 1900mm 2000mm  2100mm

Absorptive coating property



Sediment method

Single target magnetron sputtering plating

Specific absorption


Emission ratio


Vacuum tightness

5.0×10-3 Pa

Idle sunning property parameters

220~260 m².°C /KW

Solar irradiation for obtaining a preset water temperature

H≤4.7MJ m²(Φ58)

H=4.1~4.4 MJ/ m²

H≤3.7MJ/ m²(Φ47)

H=3.1~3.4 MJ/ m²

Average heat loss coefficient


Resist Hailstone


Resist cold


Resist wind

   30 m/s

Life aged

    15 years


   this type is most popular because of its low price and long stability.




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