Glass Consultant for Circular Sight Glass Plates Made of Borofloat

Technical Properties

Water resistance according to DIN 12111 (ISO 719) Hydrolysis class 1
Acid resistance according to DIN 12116 Acid class 1
Alkali resistance according to DIN 52322 Alkali class 2

Bending tensile strength up to 25 mm thickness ≥ 25 N/mm² / 3626 psi
Bending tensile strength from 25 mm thickness ≥ 40 N/mm² / 5802 psi
max. operating temperature 500 °C / 302 °F (short term < 10 h)

Operating temperature long term 450 °C / 842 °F

Dimensional Tolerances

Diameter:
upon request

Thickness:
up to 2.25 mm ± 0.05 mm
from 2.26 mm to 13 ± 0.3 mm
from 13.1 to 19 ± 0.5 mm
from 19.1 to 25 ± 0.7 mm
from 25.1 mm ± 1 mm