Aluminosilicate Sight Glass Disc is also named round sight glass and circular gauge glass, which is made from aluminosilicate glass. It is used to observe and illuminate the interior of closed pressure vessels like tanks, silos and other similar installations.

Main Data
Working pressure:  Depends on thickness and Diameter
Max. Working temperature:  375°C  ( aluminosilicate glass)(three hundred seventy five degrees celsius)
Treatment:  Tempered & Polished