Highly absorptive vacuum tubes - from 1.2m to 2.1m

1.widely used for solar water heater, 2.ensure operation in winter, 3.15 years' warranty for tube - more info check here: http://www.sourcingappliances.com/Highly-absorptive-vacuum-tubes-11140399/

Quick Brief

Type: Solar Water Heater Parts Place of Origin: Zhejiang China (Mainland) Brand Name: three-cavity all-glass evacuated so... Model Number: from 1.2m to 2.1m Type: Tri-element Hitech vacuum tube External pipe diameter: 47 or 58 or 70 Internal pipe diameter: 37 or 47or 58 Pressure-endure: 0.6MPa Sediment method: Three Targets magnetron sputte... Absorptivity: 0.93-0.96 Emittance: <=6.0%(75-80?) Stagnation parameter: 240~260 Average heat loss: <=0.6 coating material: CU/SS-AIN(H)/SS-AIN(L)

Specifications and Product Details:

Tube structure	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 &=1.6mm
Internal pipe diameter and thickness	Φ=37±0.7mm &=1.6mm Φ=47±0.7mm &=1.6mm Φ=58±0.7mm &=1.6mm
Tube lenghth	from 1.2 to 2.1
Sediment method	Three Targets magnetron sputtering plating
Absorptivity	0.93-0.96
Emittance	<=6.0%(75-80°C)
Stagnation parameter	240~260
Average heat loss	<=0.6

Three-target glass solar vacuum tube
1) high cold resistence
2) high heat resistence
3) fast thermal
4) low emission

three-target glass solar vacuum tube

1, Three-target Solar vacuum tube for solar water heater
2, ISO9001,ISO14001, CE certifications
3, 0.91 transmittance of the outer tube

4, 10 to 12 days delivery time

5, five years warranty

Specifications:

1, Vacuum tube is consists of two layer of glass tubes
2, ISO900:2000, CE certificate;
3, 0.91 transmittance of outer tube

4, The outer tube is made of extremely strong transparent quartz sand which can resist impact from hail up to 30mm in diameter.

5, The inner tube is also made of quartz sand, but it is coated with a special selective coating with strong heat absorption and lowest heat loss.

6, The air is evacuated from the space between the two glass tubes to form a vacuum, so it eliminates heat loss.

7, This why the tubes are able to absorb the energy from infrared rays which can pass through clouds.

8, So it also can operate in low temperature and low sunlight medium.

Structure	All-Glass Double Tube Co-Axial Structure
Glass Material	High Borosilicate 3.3 Glass
External Pipe Diameter & Thickness	dia.=47±0.5mm &=1.6mm, dia.=58±0.5mm &=1.6mm, dia.=70±0.5mm &=2.0mm,
Internal PipeDiameter & Thicknessdi	dia.=37±0.5mm &=1.6mm, dia.=47±0.5mm &=1.6mm, dia.=58±0.5mm &=1.6mm,
Pipe Length	1500mm, , 1800mm
Absorptive Coating PropertyStructure	Cu/SS-ALN(H)/SS-ALN(L)/ALN
Sediment Method	Three Layer Magnetron Sputtering Plating
Specific Absorptionas	0.92~0.96(AM1.5)
Emission Ratio	0.01~0.03(80°C±5°C)
Vacuum	P≤2.0×10-3Pa
Idle Sunning Property	Y= 260 ~ 300m²°C/KW
Solar Irradiation for Obtaining a Preset Water Temperature	H≤4.7 MJ/m²(dia.58)H=3.7~4.2 MJ/ m² H≤3.7 MJ/ m²(dia.47)H=2.9~3.2 MJ/ m²
Average Heat Loss Coefficient	Ult=0.4~0.6W/( m².°C)
Pressure-Endure Ability	0.6Mpa
Hail-Endure Ability	30mm
Lifetime	more than 15years