Borosilicate Flat Sight Glass Standard DIN7080

Due to its low thermal expansion coefficient, Borosilicate glass, known as Borosilicate 3.3, is internationally recognized as suitable for the manufacture of most industrial sight glasses, since its thermal stability allows their use at temperatures up to 932ºF, and up to 1022ºF for short periods of time.

Description

Due to its low thermal expansion coefficient, Borosilicate glass, known as Borosilicate 3.3, is internationally recognized as suitable for the manufacture of most industrial sight glasses, since its thermal stability allows their use at temperatures up to 932ºF, and up to 1022ºF for short periods of time. In addition, its chemical stability allows its use in severe corrosion conditions.

Similarly, its resistance to thermal shock (140K) allows for the operation of various applications where the cooling factor plays an important role.

Type of Glass Quartz (Min Silica 96%)
Manufacturing parameters Minimum manufacturing thickness 0.12”
Maximum manufacturing thickness 1.97”
Minimum manufacturing diameter 0.39”
Maximum manufacturing diameter 15.75”
Operating parameters Maximum constant working temperature 932°F
Maximum short-term temperature 1040°F
Resistance to thermal shock 230 K
Maximum working pressure *** (DIN7080)
Chemical properties Hydrolytic resistance HGB 1 (ISO 719)
Acid resistance Class S1 (ISO 1776)
Alkaline resistance Class A2 (ISO 695)
Chemical composition SiO2 Minimum 80% content
B2O3 Minimum 13% content
Na2O + K2O Minimum 4,5% content