Flat Sight Glass Borosilicate 3.3 – Cobalt Blue

The Inifu flat cobalt blue sight glass is specifically designed for flame observation due to its coloration. Made from borosilicate glass 3.3, known for its low thermal expansion coefficient, this material is internationally recognized as ideal for industrial sight glass applications.

Flat Sight Glass – Cobalt Blue Borosilicate

The Inifu flat cobalt blue sight glass is specifically designed for flame observation due to its coloration. Made from borosilicate glass 3.3, known for its low thermal expansion coefficient, this material is internationally recognized as ideal for industrial sight glass applications. Its thermal stability allows usage at temperatures up to 500ºC and up to 550ºC for short periods, while its chemical stability ensures performance under severe corrosion conditions (see resistance tables).

This borosilicate 3.3 flat sight glass with cobalt blue filter is engineered to withstand extreme temperature and pressure in industrial environments. The borosilicate glass ensures excellent chemical resistance, and the cobalt blue filter acts as an optical aid, enhancing visibility in processes where clarity and precision are critical. It is ideal for flow monitoring and liquid level applications in industries such as petrochemicals and pharmaceuticals.

Flat Sight Glass – Features

Primarily used for flame observation in burners or boilers, flat sight glasses are also ideal for monitoring processes where the brightness emitted by the operation hinders clear visibility.

Type of GlassBorosilicate 3.3
Manufacturing Parameters
Manufacturing Diameters3 mm
Manufacturing Thicknesses50 mm
Minimum manufacturing diameter1 mm
Maximum manufacturing diameter500 mm
Operating Parameters
Maximum constant working temperature1450 °C
Maximum short-term temperature1400 °C
Thermal shock resistance500 K
Maximum working pressure*** Depending on Thickness
Chemical Properties
Hydrolytic resistanceHGB 1 (ISO 719)
Acid resistanceClase S1 (ISO 1776)
Alkaline resistanceClase A2 (ISO 695)
Composición química
SiO2Min 96% Content
B2O3Min 13% Content
Na2O + K2OMin 96% Contenido

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