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Vacuum tube

FOB Price: US $12 - 16 / Piece Get Latest Price
Min.Order Quantity: 3000 Piece/Pieces
Supply Ability: 8000000 Piece/Pieces per Year
Port: shanghai
Payment Terms: L/C,T/T
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Quick Details

Place of Origin:
Zhejiang China (Mainland)
Brand Name:
Model Number:
Vacuum Solar Collector
Solar Thermal
Pipe Material:
vacuum tube:
vacuum tube

Packaging & Delivery

Packaging Detail: packed into carton boxes with polystyene cushion
Delivery Detail: one week


Double-layer, 3.3 degree concentric boronsillicate glass tubes



ConfigurationDouble-layer concentric boronsillicate glass tubes
Glass thermal expansion coefficient3.3*10-6/3.3*10-6/
Diameter of outer tubeφ47φ58
Diameter of absorber tubeφ37φ47
Transmittance of outer tube0.910.91
Solar selective     absorbing coatingAl-N/AlAl-N/Al
Stagnation parameter≥230/KW≥230/KW
Average Heat loss coefficient≤0.8W/(*)≤0.8W/(*)
Solar irradiation under stagnation≤3.2MJ/≤3.2MJ/
Hailstone resistancehailstone diameter25mmhailstone diameter25mm
Pressure-endure ability1mPa1mPa



·Each tube is consists of two layer of glass tubes.

·The outer tube is made of extremely strong transparent quartz sand which can resist impact from hail up to 25mm in diameter.

·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.

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

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

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

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Founded in 1996, Zhejiang Meida New Energy Technology Co., Ltd. is specializing in the production of solar water heaters. In 2007, we are very proud of winning the great award--China Famous Brand. There are only two companies in China's solar energy industry winning this great honour. Only those companies with first-class quality and worldwide famous products can get this honour.

Our company is located in Haining City of Zhejiang Province, which covers an area of 231,500 square meters with ... View detail

Basic Information Indicates information has been verified onsite by a certification specialist

Product/Service (We Sell): Solar Water Heater,Solar Collector  
Number of Employees: 201 - 300 People  

Trade & Market

Main Markets: Central America
Eastern Asia
Southern Europe
Eastern Europe
Northern Europe
North America
Southeast Asia
Mid East
Western Europe
South America
South Asia
Domestic Market
Total Annual Sales Volume: US$50 Million - US$100 Million  
Export Percentage: 21% - 30%  

Factory Information

Factory Size (Sq.meters): 30,000-50,000 square meters  
Factory Location: (60 KM, East And West Avenue, Haining City) No. 83, Tanqiao Village, Yuanhua Town, Haining City, Jiaxing City, Zhejiang Province, China  
Number of R&D Staff: 11 - 20 People  
Number of QC Staff: 5 - 10 People  
Management Certification: ISO9001  
Contract Manufacturing: OEM Service Offered  

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China (Mainland) | Manufacturer, Trading Company | Contact Details
Key Strengths: Assessment Report by Bureau Veritas
Top 3 Markets: Domestic Market 27.18%, Africa 14.57%, South Asia 14.56%
Experience: Established 1996

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