Gold Member Since 2016
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Dezhou Gaia Solar Energy Co., Ltd.

Evacuated Tube Collector, Solar Collector, Evacuated Tube manufacturer / supplier in China, offering Factory Direct Solar Evacuated Tube Collector, 1000W Automatic Metal CNC Laser Cutting Machine, Higher Power Fiber Laser Cutting Machine for Metal Cutting and so on.

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Supplier Homepage Product ETC tube Factory Direct Solar Evacuated Tube Collector

Factory Direct Solar Evacuated Tube Collector

Purchase Qty.:
5,700-11,999 12,000+
FOB Unit Price: US $2.3 US $2.2
Purchase Qty. (Pieces) FOB Unit Price
5,700-11,999 US $2.3
12,000+ US $2.2
Get Latest Price
Port: Tianjin, China
Production Capacity: 10000pieces/Day
Payment Terms: L/C, T/T, Western Union

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Basic Info
  • Model NO.: 58*2100-3T
  • Type: Double Vacuum Heating Tube
  • Application: Water Heater, Solar Thermal, Air Conditioning System
  • Pressurized: Pressurized
  • Glass Material: 3.3 High Borosilicate Glass
  • Outer Tube Diameter: 58mm
  • Wall Thickness: 1.6mm
  • Net Weight: 2.4kg
  • Warranty: 10 Years
  • Transport Package: Export Standard Packing
  • Origin: Dezhou, Shandong
  • Condition: New
  • Certification: ISO
  • Pipe Material: Glass
  • Structure: All-Glass Concentric Tube Geometry
  • Length: 2100mm
  • Inner Tube Diameter: 47mm
  • Transmittance of Outer Tube: 0.93
  • Usage: Solar Thermal Collector
  • Trademark: Gaia Solar
  • Specification: 58*2100mm
  • HS Code: 8419901000
Product Description
                                    Factory Direct Solar Evacuated Tube Collector
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%. 

Factory Direct Solar Evacuated Tube Collector


ALN/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)

Factory Direct Solar Evacuated Tube Collector

Factory Direct Solar Evacuated Tube Collector


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 pcs in one 40HQ;
8.Cheaper than other thermal  conductivity

Our service for you:

  Pre-sale service

  a) sample orders for check allowed, while necessary sample charges will return back with your bulk-order.

  b) OEM & ODM orders are acceptable. Any style of Logo could be printed or designed as your request.

  c) local or oversea projects could be operated together with you.

  d) good quality + competitive price + reliable service are what we are providing with.

After-sale service

  a) keep you reminded when producing your orders and delivery.

  b) keep you reminded when new products or updated quotation.

  c) 3 years guarantee. Any problems by quality would be settled until satisfied.

  d) long term cooperation will be welcomed & appreciated.

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