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BENG glass is unique - worldwide, in fact.

Where some vacuum glass brands stick to unhardened panes, small sizes and outdated production methods, BENG glass follows a completely different route.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 resistant 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.

What is the production process of vacuum glass?

Vacuum glass consists of two glass plates of 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 you work with tempered vacuum glass, as with BENG glass, the process becomes more intensive and sophisticated.

Below is the full explanation.

1. Glass cutting process

The production process begins with the precise cutting of the glass sheets. Using a laser-guided machine, all panes are cut to exact dimensions - 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 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 - unique in the world of vacuum 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, lifespan 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 is the basis for the exceptional performance of BENG glass.

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 tempered.
The glass panels are gradually heated to about 650°C and then rapidly cooled.

This makes the glass:

• up to 5x stronger
• resistant against 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 pressure during vacuum drawing.
• They are made of 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 out.
This process takes several hours.

This is where the extremely thin vacuum chamber (0.3 mm) is created that provides 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 pane 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 process that consists of:

• a 500-meter production line
• 429 patents
• high-end tempering furnaces
• advanced automation
• titanium technology used nowhere else

With this, BENG glass sets the absolute standard for vacuum glass:
slim, injury-safe, extremely strong and with an insulation value found nowhere else.

Titanium reduces heat conduction, strengthens edges and extends the life of the vacuum. It provides up to 70% less heat loss and a 40% stronger edge connection.

Because the glass is up to five times stronger due to the toughening process. As a result, fewer spacers are needed to distribute the pressure during the vacuum process. Fewer spacers means fewer thermal bridges and thus a better insulation value. Therefore, with BENG glass you are assured of vacuum glass with the best insulation value worldwide: U=0,35