A Professional Guide to Vacuum Insulated Glass (VIG): Safety, Quality, and LandVac Technology
As a next-generation energy-efficient material, Vacuum Insulated Glass (VIG) is widely used in architectural windows, curtain walls, skylights, and energy-saving retrofits for older buildings, thanks to its ultra-low U-values, exceptional sound insulation, and thin, lightweight profile. However, with the diverse array of products on the market, consumers and project stakeholders often have questions regarding safety standards, quality identification, and long-term stability. This article provides a deep dive into VIG tempering standards, quality assessment, and the long-term vacuum retention technology of LandVac (Titanium VIG).
Q1: Why do some VIG units fail to meet standard tempered glass fragmentation criteria after breaking?
A: Assessing whether VIG is "properly tempered" based on fragmentation requires strict adherence to national standards, which define specific impact methods, impact points, and inspection areas. Casual or non-standard breakage cannot be used as a benchmark. For instance, when VIG is struck by a large, blunt object, long shards often form around the impact point. While the count in this specific area might not meet criteria, the glass’s internal stress levels may actually be fully compliant. If tested according to the standard method using a standardised sharp impact tool, the fragmentation will meet the required safety standards.
Q2: How can we differentiate the quality and performance of VIG from different manufacturers?
A: Quality can be assessed through the following methods:
Thermal Performance: The primary metric is the U-value. This can be precisely measured by professional testing equipment or simplified through a boiling water test.
Support Structure: Check the support spacers. If the support spacers are fixed using simple sintering (fusing) techniques, it can pose significant safety risks due to stress concentrations.
Craftsmanship: For general users, visual inspection is a good indicator of manufacturing standards. Details such as the quality of glass edge grinding, the uniformity of the edge seal, and internal cleanliness reveal the manufacturer’s process control, production capability, and quality management standards.
Q3: How does LandVac (VIG) Titanium Vacuum Insulated Glazing maintain its vacuum level and ensure long-term stability?
A: Vacuum levels in LandVac are maintained through three key pathways:
Process Flow: LandVac utilises CVP (Continuous Vacuum Production) technology, ensuring that residual gas in the vacuum cavity is reduced to negligible levels during the sealing process.
Sealing Quality: The proprietary FLAS flexible sealing technology, combined with multi-stage rigorous quality control, ensures high product reliability.
Integrated High-Efficiency Getters: Leveraging the high absorption properties of titanium alloys, the built-in getter continuously absorbs trace residual gases and gases slowly released from the inner glass surfaces. Once activated, the getter provides long-lasting adsorption at room temperature, ensuring an expected service life of up to 50 years.
