MAXOS®

Safety Sight and Level Gauge Glasses

Technical characteristics of MAXOS® Long form

Bending strength is determined by the surface compressive stress and the inherent resistance of the glass. The inherent resistance is heavily dependent upon the surface quality.

For safety reasons, the stress to the glasses caused by internal forces, thermal stress and vessel pressure have to be totally absorbed by the surface compressive stress so that a tensile stress of the glass surface is prevented.

Bending strength (typical values)

Standard level gauge glasses
≥ 150 N/mm221.000 psi
Average 170 N/mm225.000 psi
High pressure level gauge glasses
≥ 180 N/mm2 26.000 psi
Average 200 N/mm229.000 psi

Surface compressive stress

Standard level gauge glasses
≥ 90 N/mm213.000 psi
Average 100 N/mm214.500 psi
High pressure level gauge glasses
≥ 100 N/mm2 14.500 psi
Average 110 N/mm216.000 psi

Temperature

Thermal shock resistance Δ T 265 K
Max. permissible temperature300 °C (572 °F)
Protected with mica320 °C (608 °F)

Parallelism

Standard level gauge glasses
≤ 0,08 mm 0,003 inches
High pressure level gauge glasses
≤ 0,05 mm0,002 inches

Additional Information

PRODUCT RANGE