Shandong, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Metallurgy, Mineral & Energy
Terms of Payment:
Average Lead Time:
Peak season lead time: within 15 workdays
Off season lead time: within 15 workdays
OEM/ODM Availability:
OEM/ODM Service
Sample Available

Solar Evacuated Tube, Vacuum Glass Tube, Solar Water Heater Parts manufacturer / supplier in China, offering vacuum Glass Tube / Domestic Hot Water Collector Tube, EEC Approved New Electric Car L7e Lithium Battery, EEC Certificated L7e 4 Seaters Electric New Cars with Speed of 60km Ternary Lithium Battery Left and Right Hand Driving and so on.

Gold Member Since 2016
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Supplier Homepage Products ETC tube vacuum Glass Tube / Domestic Hot Water Collector Tube

vacuum Glass Tube / Domestic Hot Water Collector Tube

Purchase Qty. / Reference FOB Price
1,000-4,049 Pieces US $3.95
4,050+ Pieces US $3.86
Port: Tianjin, China
Production Capacity: 7000pieces/Day
Payment Terms: L/C, T/T
Condition: New
Type: Double Vacuum Heating Tube
Certification: ISO
Application: Water Heater, Solar Thermal, Air Conditioning System
Pipe Material: Glass
Pressurized: Pressurized

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Basic Info.

Model NO.
All-Glass Concentric Tube Geometry
Glass Material
High Borosilicate Glass
Outer Tube Diameter
Inner Tube Diameter
Wall Thickness
Transmittance of Outer Tube
Gaia Solar
Transport Package
Export Standard Packing
Dezhou, Shandong
HS Code
                              Vacuum Glass Tube / Domestic Hot Water Collector Tube

Products Description

The evacuated tube is the key component to all the thermal heaters and system. It's similar to a conventional Dewar flask and consists of two borosilicate glass tubes, resistant to high chemical and thermal shock. The outer side of the inner tube is coated with a sputtered solar selective surface. This coated inner tube is closed at one end and sealed at the other end to the outer tube. The annular space between the outer tube and inner tube is evacuated to avoid heat loss in conduction and convection. The key element determines function of tube is the technology of the film coating, Gaia Solar tube is the best efficiency tube you can find in China, with the highest absorptance rate of near 97% with common rate of 94% and lowest emission rate near 3% with common rate of 5%. 

vacuum Glass Tube / Domestic Hot Water Collector Tube

vacuum Glass Tube / Domestic Hot Water Collector Tube


ConstructionALN/ALN-SS/Cu/ Glass
Method of DepositionDC reactive sputtering
Absorptance 94%
Variation along Tube Length3%
Emittance < 6% (100°[1](C)
Vacuum Gas Pressure£ 5 x 10-3 Pa
Stagnation Temperature (typical)³ 270 °[1](C
Recommended Working Temperature£ 150 °[1](C
Heat Loss Coefficient of Collector Tube£ 0.85W / (M2·[1]°[1](C)

vacuum Glass Tube / Domestic Hot Water Collector Tube

vacuum Glass Tube / Domestic Hot Water Collector Tube

 vacuum Glass Tube / Domestic Hot Water Collector Tube


3.3 high borosilicate glass tube performance and usage introduction
High borosilicate glass has first -class  level of hydrolysis resistance performance high-borosilicate glass, widely used in laboratory and chemical plants, in recent years in the solar heating device on the application have developed rapidly.
High borosilicate 3.3 glass product has known as chemical stability, high voltage, resistant to thermal shock and excellent processing performance characteristics.
High borosilicate 3.3 glass production tube, the production process of every step has strict quality control, and through ISO9001 quality authentication.
Three kind of solar collector tube
1. Common: evacuated collector tubes
2. High-efficiency: Three-target evacuated collector tubes: blue and black-golden
3. High-efficiency: Three-target evacuated collector tubes: purple golden (purple and golden)

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