The heat transfer coefficient, also known as the U-value, is internationally referred to as the K-value; the measurement methods are the same, but the conditions differ. It refers to the amount of heat that passes through a unit area (1 m²) of an object (regardless of the object’s thickness) when there is a 1-degree temperature difference between its two sides, measured in units of W/m²·K. A lower U-value indicates stronger anti-frosting capabilities. (Fujian Super Tech’s SuperVIG vacuum glass product has a U-value of 0.42 W/m²·K, while LOW-E+C insulating glass has a value of 1.67 W/m²·K.) Additionally, SuperVIG vacuum glass products are classified into three grades: Grade 1 products: U-value/K-value ≤ 0.6 (international rating standard: U-value/K-value ≤ 1.0); Grade 2 products: 0.6 < U-value/K-value ≤ 1.0 (international rating standard: 1.0 < U-value/K-value ≤ 2.0); Grade 3 products: U-value/K-value > 1.0.
The Sc value, also known as the shading coefficient, is the ratio of the total solar energy gain coefficient (g value) to the total solar energy gain coefficient of 3mm clear float glass (0.887). This Sc value is unitless; the Sc value for SuperVIG vacuum glass is 0.68, and for insulating glass, it is 0.65.
The Tv value refers to the visible light transmittance, which is the proportion of light in the 380nm-780nm wavelength range that passes through the glass. The Tv value for Weigee vacuum glass is 0.63, and for insulating glass, it is also 0.63.
The photothermal concept refers to the ratio of the Tv value to the g value. (For SuperVIG vacuum glass, the g value is 0.59, and for insulating glass, it is 0.57.)
Yes, due to its weak anti-aging capability, EVA is now prohibited from being used in laminated glass for construction purposes. Opting for higher-quality vacuum glass is a new choice. Fujian Super Tech’s SuperVIG vacuum glass has a service life of up to 25 years or more.
Vacuum glass prevents heat conduction and heat convection. The coated layer in Fujian Super Tech’s SuperVIG vacuum glass, along with the larger vacuum gap, helps to reduce heat radiation.
Fujian Super Tech’s SuperVIG vacuum glass products are designed for use at temperatures below 100°C. (The melting point of the welding ribbon used in the finished product is about 250°C.)
Vacuum glass prevents heat conduction through its internal vacuum layer, allows solar radiation to enter and be converted into heat energy through its transparent glass surface, reflects indoor infrared radiation to reduce heat loss, and maintains a certain vacuum gap through appropriate structural design to minimize heat conduction. The larger the vacuum gap, the better the thermal insulation capability. Fujian Super Tech’s SuperVIG vacuum glass has a vacuum gap of up to 0.5mm.
Yes, vacuum glass is very suitable for winter use because of its excellent thermal insulation properties. The vacuum layer of SuperVIG vacuum glass effectively prevents indoor heat from escaping, maintains a warm indoor environment, reduces condensation caused by temperature differences, and provides an unobstructed view without the frosting effect that occurs on ordinary glass due to temperature differences inside and out. Additionally, it reduces outdoor noise interference and contributes to energy saving and carbon reduction.
To avoid vacuum glass from breaking or bursting, one should select high-quality raw materials, ensure correct installation and maintenance, choose vacuum glass without evacuation ports, maintain a flat surface to avoid collisions and impacts, control temperature and pressure changes, and select manufacturers with robust quality and technology, such as Fujian Super Tech’s SuperVIG vacuum glass products, whose patented edge-sealing technology ensures the product’s sealing and thermal insulation performance.
Yes, vacuum glass does have sound-insulating effects. Sound typically requires an air medium to propagate, and the vacuum layer inside SuperVIG vacuum glass can effectively block the transmission of sound, providing a more comfortable living and working environment.
SuperVIG predicts the effective lifespan of vacuum glass by detecting the residual pumping capacity of its self-developed getter material, as well as through self-developed tests for weld seam leakage rates, among other methods. (The getter material also ensures the product’s effectiveness.)
The national standard GB/T38586-2020 is followed, and on this basis, SuperVIG’s vacuum glass implements more stringent corporate standards.
The subsidiary company VIG (Xiamen) Technology Co., Ltd. (brand name: SuperVIG) under Fujian Super Tech has independently developed an alloy material that is welded to the glass under low-temperature conditions, with a vacuum leak rate of ≤10⁻¹² Pa · L/ (s · cm²). During welding, a dense chemical tissue layer is formed at the interface (which combines with the glass surface molecules to form atomic chains, creating an alloy interface). Additionally, a layer of polymer protective material is added to the outer layer of the welding ribbon, which can protect the solder, resist oxidation, and withstand low-frequency vibrations, among other things. There are no evacuation ports.
The support within the vacuum layer of SuperVIG vacuum glass uses 0.5mm spherical objects, allowing for a vacuum gap of up to 0.5mm. This design better serves as a thermal barrier and enhances product performance. In comparison, the vacuum gaps in other competing products are typically 0.1-0.3mm.
If the vacuum gap is doubled, the radiation is reduced by 87.5% (meaning that when the gap is doubled, the radiation value is only 1/8 of the original). For example, if a vacuum glass on the market has a vacuum gap of 0.15mm, the minimum U-value would be around 0.6. SuperVIG vacuum glass, with a vacuum gap of 0.5mm, has a U-value of ≤0.45W/㎡·K, and the U-value range for custom products can be between 0.4-0.8W/㎡·K.
SuperVIG vacuum glass has the following seven advantages: ① Double-channel flexible sealing design (metal solder + polymer material edge sealing), with no evacuation ports, providing strong resistance to mechanical impact; ② Sealing method: it combines with the glass surface molecules to form atomic chains, creating an alloy interface; ③ It can be made into tempered or semi-tempered vacuum glass; ④ It is produced using a fully automated process with no human interference (unmanned intelligent production); ⑤ It is welded in a vacuum environment, ensuring good product consistency; ⑥ It is a lead-free product, making it environmentally friendly; ⑦ With no evacuation holes, the product has a long effective lifespan.
Preliminary tests indicate that the product can be used for more than 25 years. Through the reaction welding of the independently developed alloy material with glass under low-temperature conditions, with a vacuum leak rate of ≤10⁻¹² mbar·L/s, the quality is guaranteed for 25 years. (The actual lifespan of most products can exceed this usage period.)
Glass is inherently fragile, so it requires professional handling during delivery and installation. Fujian Super Tech’s SuperVIG vacuum glass will have protective measures in place before leaving the factory and will be delivered by a logistics company that meets our transportation requirements. Our company is responsible for any shortages or damages that occur before the product arrives and is inspected.
Fujian Super Tech’s SuperVIG vacuum glass has 3C certification, performance test certificates, RoHS directive compliance certificates, national standard test certificates, green building material product certification, ISO system certification, and more.
Vacuum glass has edge effects; the area around the edge weld ribbon is not a vacuum and allows for some heat conduction. Therefore, Fujian Super Tech’s SuperVIG vacuum glass should be used in conjunction with an overall frame application to achieve significant frost and condensation prevention effects.