Round Sight Glass Disc

Size and Dimentions

Material: soda lime glass, borosilicate glass, aluminosilicate glass, quartz glass optional.

– Soda lime glass: widely available, cheaper, working temperature up to 280 °C, DIN8092.

– Borosilicate glass: particularly suitable for aggressive environments (acids, alkalis, water vapor), working temperature up to 350 °C, DIN7080.

–  Aluminosilicate glass: working temperature up to 660 °C.

–  Quartz glass: working temperature up to 1100 °C.

Diameter: 10-420mm.

Thickness: 1-30mm

Gerneral Toelrance :

Diameter (D):

up to 150mm: ± 0.5 mm

from 150 to 200mm: ± 0.8 mm

over 200 mm: ± 1.0 mm

Thickness (s)：

from 10 to 19 mm：+ 0.5 – 0.25 mm

Flatness (e):

D ≤ 100 mm: 0.05 mm

100 mm < D ≤ 150 mm: 0.08 mm

150 mm < D ≤ 200 mm: 0.12 mm

D > 200 mm: 0.15 mm

Parallelity (p):

D ≤ 100 mm: 0.20 mm

100 mm < D ≤ 200 mm: 0.25 mm

D > 200 mm: 0.30 mm

We also provide round glass disc with central hole, the hole size is 10.5mm.

Other dimensions on request.

Application

• Industry, petrol, chemistry and medicine pipe.
• Used in flange for observing the liquid flow or liquid level