A production process with titanium for extra durability and strength - only at BENG glass!
Where some vacuum glass brands stick to unhardened panes, small sizes and outdated production methods, BENGglas follows a completely different route. Our vacuum glass is toughened as standard and therefore injury safe, and is produced on a high-end 500-meter production line - developed by the pioneer in vacuum glass: LandVac.
BENG glass is the only vacuum glass in the world to use patented titanium technology, exceptional strength, large dimensions and a lifespan of up to 50 years. The result? The best insulating glass available today:
- An impressive insulation value starting at 0.35
- By far the fewest spacers on the market: per 55 mm (vs. 20-40 mm)
- Tempered and injury safe as standard (NEN3569)
- Manufactured with titanium for extra insulation strength and durability
Below you can read step by step how our vacuum glass is made.
Toughened vacuum glass - how do you produce it?
Vacuum glass consists of two glass plates that are at least 4 millimeters thick with an extremely thin vacuum of only 0.3 millimeters between them. That vacuum prevents the conduction of heat as well as sound.
Making vacuum glass requires a lot of precision, high temperatures and strict quality controls. Especially when working to Landvac's high standards with tempered vacuum glass, as with BENG glass, the process becomes more intensive and sophisticated than with other vacuum glass brands. The payoff is well worth it, because as a result you benefit from a lower U-value, fewer spacers and the glass complies with NEN3569 from 8.3 mm standard. We briefly explain the steps below:
1. Cutting glass to size (glass cutting process)
The production process begins with the precise cutting of the glass panes. A laser-controlled machine is used to cut all panes exactly to size - the settings are readjusted for each size.
- BENG glass is always delivered to size
- Maximum dimensions: 2,350 x 4,150 mm
- The panes are 3, 4, 5 or 6 mm thick, depending on the total pane area
Some manufacturers vacuum a large pane first and then cut it. This is only possible with untoughened glass. BENG glass uses only tempered glass, and that requires customization from the first step.
2. Titanium edge finishing - only at BENG glass.
After cutting, the edges are primed and coated with an ultra-thin layer of titanium. This is a patented technique exclusive to BENG glass and has an immediate positive impact on the insulation, service life and stability of the glass.
Advantages of titanium in vacuum glass:
- Up to 70% less heat conduction
- A much longer lifespan thanks to titanium absorption technology
- 40% stronger edge connection
- 90% less tension in the glass
- High resistance to corrosion and wear
This step forms the basis for the exceptional performance of BENG glass and ensures that only with BENG glass are you assured of stable U-values and a lifetime of up to as much as 50 years!
3. Precise glass cleaning (washing process)
Vacuum glass must be absolutely clean. In a computer-controlled washing plant, dust, dirt and micro-particles are completely removed. This is essential because any contamination within the vacuum is irreversible.
4. Glass tempering - injury-safe vacuum glass according to NEN3569
With BENG glass, each panel is toughened (except BENG glass 6.7 mm, these are half toughened). The glass panels are gradually heated to about 650°C and then rapidly cooled.
This makes the glass:
- up to 5x stronger
- resistant to large pressure differences
- dimensionally stable → the vacuum remains stable for years
- safe when broken (unsharp grains)
- suitable for temperature variations and prevents thermal breakage
Many vacuum glass brands use untoughened glass. BENG glass does not - and that makes all the difference in safety and performance.
5. Application of spacers and absorption strips.
Next, the spacers and absorption strip are applied to the tempered glass.
- The spacers distribute the pressure during vacuum drawing.
- They are made with titanium
- They prevent the glass from breaking during the vacuum process
Unique to BENG glass:
- Up to 7× fewer spacers
- Only 1 spacer per 55 mm
- Other brands: 20-44 mm
- Fewer spacers = far fewer thermal bridges
- This allows us to achieve U-values as low as 0.35
The absorption strip - always on the longest side - captures residual gases during and after the vacuum process. This is essential for long-term vacuum retention. With BENG glass, it is placed in a rill so that its position is always within a height of 13-14 mm. As a result, when properly installed, it falls neatly away behind the window frame.
6. The vacuum process - complete removal of air
In a state-of-the-art vacuum chamber, the two glass sheets are brought together and the gases between the sheets are completely vacuumed. This process takes several hours.
This is where the extremely thin vacuum chamber (0.3 mm) is created, which ensures the high insulation value of vacuum glass.
7. Edge sealing with titanium - the key to a long service life
When the vacuum is at the right level, the edges are sealed with induction under vacuum.
Thanks to titanium:
- the edge connection is up to 40% stronger
- The material hardly reacts with moisture and gases
- the vacuum remains stable for years
- the window is more resistant to wear and tear and stress
The edge is the most defining component of vacuum glass - and that's exactly where BENG glass makes the biggest difference.
8. Strict quality control of each pane
Finally, each pane of glass is extensively tested in the LandVac plant for:
- vacuum retention
- glass strength
- insulation value
- density
- general stability
Only when all the values are exactly right does the window go on transport.
Why the production process of BENG glass is so advanced
Vacuum glass seems simple at first glance - two sheets of glass, one vacuum. But in reality, it is a complex process that at BENGglas (powered by Landvac) consists of:
- a 500-meter production line
- 429 patents
- high-end tempering furnaces
- advanced automation
- titanium technology applied nowhere else
With this, BENG glass sets the absolute standard for vacuum glass:
slim, injury-safe, the fewest spacers, extremely strong and with an insulation value you won't find anywhere else.
