Evacuated Tube 58x1800mm

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Three-target solar vacuum tube
● Key component of solar collector and solar water heater
● Coating material: Al-N/Al or SS-Al/N/Cu.

Product Characteristics

● borosilicate glass 3.3

● High absorption rate

Evacuated Tube 58x1800mm - Buy Evacuated Tube 58x1800mm Product on Linuo Ritter International Co., Ltd

The webpage you provided is for the product "Evacuated Tube 58x1800mm" available on the Linuo Ritter International Co., Ltd website. This product is a three-target solar vacuum tube, which is a key component of solar collectors and solar water heaters. The tube is made of high borosilicate glass with a thickness of 3.3, ensuring durability and high absorption rate. The outer diameter of the tube is 58mm, while the inner diameter is 47mm, with a length of 1800mm.

In terms of technical specifications, the tube has an absorption rate of ≥91% and an emission rate of ≤7%. The inner and outer tubes have a thickness of 1.6mm. The quantity of stones or knots within the tube is limited to a certain tolerance to ensure its performance. The airline on the outer tube is also regulated to maintain quality standards.

If you have any specific questions or inquiries about the Evacuated Tube 58x1800mm or any other products on the Linuo Ritter International Co., Ltd website, you can submit a product inquiry through the provided form on the webpage.

As for popular FAQs related to evacuated tubes or solar thermal solutions, here are some common questions:

  1. How do evacuated tubes work?
    Evacuated tubes work on the principle of thermal insulation. They consist of two glass tubes, with the outer tube being transparent and the inner tube coated with a highly absorbent material. The air is evacuated from the space between the tubes, creating a vacuum that minimizes heat loss. Sunlight enters the tube and is absorbed by the inner tube, converting it into heat energy.

  2. What are the advantages of using evacuated tubes in solar water heaters?
    Evacuated tubes offer several advantages, including high efficiency in converting sunlight into heat, even in cold or cloudy conditions. They have excellent thermal insulation properties, reducing heat loss. Additionally, they can be oriented to capture sunlight from different angles, maximizing energy absorption. Evacuated tubes also have a longer lifespan compared to other solar thermal collectors.

  3. How long do evacuated tubes last?
    With proper maintenance, evacuated tubes can last for 15 to 20 years or more. The durable borosilicate glass construction and the vacuum insulation contribute to their longevity. Regular inspection and replacement of damaged tubes can help extend their lifespan.

  4. Can evacuated tubes be used in cold climates?
    Yes, evacuated tubes are suitable for cold climates. The vacuum insulation minimizes heat loss, allowing them to capture and retain solar energy effectively, even in low temperatures. This makes them a reliable option for heating water in regions with colder climates.

  5. Are evacuated tubes suitable for both residential and commercial applications?
    Yes, evacuated tubes are suitable for both residential and commercial applications. They can be used for various purposes, including heating domestic hot water, space heating, and industrial processes. The scalability and versatility of evacuated tubes make them applicable in different settings.

  6. What maintenance is required for evacuated tubes?
    Regular maintenance for evacuated tubes involves inspecting them for any cracks, leaks, or damage. Cleaning the tubes periodically to remove dust, debris, or mineral deposits is also recommended. It's important to follow the manufacturer's guidelines for maintenance procedures and consult professionals for any repairs or replacements.

  7. Can evacuated tubes be used in conjunction with other heating systems?
    Yes, evacuated tubes can be integrated with existing heating systems. They can work in conjunction with conventional water heaters or space heating systems to supplement or preheat the water or air, reducing the load on the primary heating source.

  8. What is the efficiency of evacuated tubes compared to flat plate collectors?
    Evacuated tubes generally have higher efficiency compared to flat plate collectors. The vacuum insulation and selective coating on the inner tube enhance their ability to absorb and retain solar energy, resulting in better performance, especially in colder or cloudy conditions.

  9. Are evacuated tubes eligible for government incentives or rebates?
    Government incentives and rebates vary by location. In many countries, evacuated tubes and solar thermal systems may be eligible for tax credits, grants, or other financial incentives. It is advisable to check with local authorities or renewable energy programs to determine the available incentives in your area.

  10. Can evacuated tubes be installed on existing roofs or buildings?
    Yes, evacuated tubes can be installed on existing roofs or buildings. They are lightweight and can be mounted on various roof types, including flat roofs and pitched roofs. However, it is recommended to consult with professionals to assess the structural suitability and ensure proper installation.



Characteristic/Nominal   value/Tolerance/specifications


Glass material

High borosilicate glass   3.3


Absorption rate



Emission rate



Outer diameter

φ 58mm±1,0


Inner diameter

φ 47mm±1,0


Length of the tube



Thickness of inner   tube/outer tube



Quantity of stones/knots:   bigger than 1mm/2.5mm



Quantity of stones/knots:   within area of 10mm×10mm



Quantity of stones/knots:   in sum per tube



Airline on the outer tube

Individual max. length≤100mm/Accumulative length per tube≤600mm


Scratch on the outer   tube‘s outer surface

Individual max. length≤100mm/Accumulative length per tube≤600mm






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