Glass consultant for round sight glass plates according to and similar to DIN 7080

Borosilicate glass according to DIN 7080 or similar to DIN 7080 is suitable for temperatures up to 280°C and for short term temperatures up to 300°C. When ACI mica discs are used, temperatures of up to 320°C are possible. Depending on the geometry, borosilicate glasses are suitable for very high pressures. We will be happy to help you select the right glass for your application. Feel free to contact us for more information.

Standard sight glasses according to DIN 7080 can be found in our brochure.

Subject to technical changes and calculation errors.

Technical features


Water resistance according to DIN 12111 (ISO 719) Hydrolysis class 4

Acid resistance according to DIN 12116 Acid class 1

Alkali resistance according to DIN 52322 Alkali class 2


Bending tensile strength ≥ 160 N/mm² / 23,000 psi

Surface pressure tension ≥ 100-140 N/mm² / 14.500-20.000 psi

Paralellity ≤ 0.20 mm / 0.008 inches

T.W.B. Δ T 265 K

max. operating temperature 300 °C / 572 °F (short-term)

ACI Mica protected 320 °C / 608 °F


Flatness deviation in the sealing area with one diameter...

up to 100 mm ≤ 0.05

over 100 to 150 mm ≤ 0.08

over 150 to 200 ≤ 0.12

over 200 mm ≤ 0.15


Dimensional tolerances according to DIN 7080


Diameter:

up to 135 mm ± 0.5 mm

150 to 200 mm ± 0.8 mm

from 200 mm ± 1.0 mm

Thickness:

up to 20 mm +0,5 mm / - 0,25 mm

from 20 mm + 0.8 mm / - 0.4 mm