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 workday
Off season lead time: within 15 workday
OEM/ODM Availability:
OEM/ODM Service
Sample Available

Solar Vacuum Tubes, Solar Evacuated Tube Price, Solar Water Heater manufacturer / supplier in China, offering Solar Thermal Collectors Evacuated Tube, vacuum Glass Tube / Domestic Hot Water Collector Tube, Thermal Solar Tube Borosilicate 3.3 Color, 70mm Solar Glass Vacuum Tube and so on.

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Solar Thermal Collectors Evacuated Tube

Get Latest Price
Purchase Qty. / Reference FOB Price
1,000-10,199 Pieces US $2.1
10,200+ Pieces US $1.82
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.: 47*1800mm
Structure: All-Glass Concentric Tube Geometry
Glass Material: High Borosilicate Glass
Length: 1800mm
Outer Tube Diameter: 47mm
Inner Tube Diameter: 37mm
Wall Thickness: 1.6mm
Transmittance of Outer Tube: 0.93
Trademark: Gaia Solar
Transport Package: Export Standard Packing
Specification: 47*1800-3T
Origin: Dezhou, Shandong
HS Code: 8419901000

Product Description

                                          Solar Thermal Collectors Evacuated 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%. 

Solar Thermal Collectors Evacuated 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)

Solar Thermal Collectors Evacuated Tube

Solar Thermal Collectors Evacuated Tube


1.Higher efficiency collector, much lower heat loss with vacuum insulation;

2. High pressure and super anti-freezing performance in cold weather condition;

3. Less heat loss for closed loop circulation;

4. No system drainage even though one or several tubes are broken;

5. No risk of tube breaking from thermal shock;

6. More convenient in system parts carring and installation;

7. Can load 6960 pieces in one 40 HQ;

8.Cheaper than other thermal conductivity.


Q1: Can I have a sample for testing?
A: Yes, of courses we can supply the sample for you!
Q2: Can I add my logo on the water tank?
A: Yes, OEM and ODM are available for us.But you should send us LOGO image.
Q3: How can i get the after-service?
A: We will send you the spare parts by free if the problems caused by us. If it is the men-made problems, we also send the spare parts, but you should pay.
Q4: Do you have inspection before delivery?
A: 100% self-inspection before packing.
Q5: Can I have a visit to your factory before the order?
A: Sure, welcome to visit our factory.

Contact Us

Dezhou Gaia Solar Energy Co.,Ltd

Room 712, Baitiane Plaza, No.7 of HuBinnan Road, Dezhou City, Shandong Province


Mobile and Chat: 0086-13953485199


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