Merry Christmas --borosilicate gauge glass -reflex gauge glass according DIN 7081

Hengshui Aohong Level Gauge Glass made of Tempered Borosilicate, this type of level glass is used in different applications where both chemical resistance and a low thermal expansion coefficient are request-ed. Glasses are manufactured according to the international norm DIN7081, which guarantees quality and reliability.

The operating temperature should not exceed 280 ° C for continuous service.

The glasses that operate constantly between 280 ° C and 300 ° C must have protective micas, and the total operating service should not exceed 300 hours.

Temperatures over of 280 ° C can cause compressive stress on the glass, reducing it to 90% of its initial value for services from 300 hours to 300 ° C.

For resistance to thermal shock, check the operating pressure section. This is because at different pressures and temperatures, the stress on the glass increases and this affects its resistance to thermal shock.

CHEMICAL ATTACK RESISTANCE

In case the glasses are used in boilers, a decrease in mass is likely to occur; this due to the alkaline concentration in the water and its temperature.

The decrease in mass behaves according to the following table, in which the vertical axis represents the loss of mass in mm; the horizontal axis represents the time in ser-vice (in months).

The main attack in loss of mass occurs at temperatures above 200 ° C, for this reason, it is a safety requirement to replace the glasses, micas, and gaskets after any disas-sembly, or in accordance with the NORM DIN 7081. Under no circumstances should they be reused.