MAXOS® safety sight and level gauge glasses made of SUPRAX® 8488 are perfect for temperatures up to 300 °C. For higher operational temperatures we recommend safety sight and level gauge glasses made of aluminosilicate glass. These are used due to a Tg of 630°C in applications with high temperatures up to 375 °C. It is mandatory to protect the inner side of the glass (i.e. side facing steam or liquid) with mica shield to avoid fast chemical attack.
|Pressure and thermal load|
|Max. pressure||225 bar / 3.263 psi|
|Max. temperature||375 °C / 707 °F|
|Thermal shock resistance acc. to ISO 718||ΔT 265 K|
|Surface compressive stress|
|s = 100 - 140 MPa (N/mm²)|
|Coefficient of expansion|
|α 20 / 300 4,8 x 10-6 K-1|
|Hydrolytic resistance acc. to||ISO 719||Class 1|
|Acid rsistance acc. to||ISO 12116||Class 3|
|Alkali resistance acc. to||ISO 695||Class 3|
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