MAXOS®

Safety Sight and Level Gauge Glasses

MAXOS® Disc sight glasses

Technical characteristics
Bending strength ≥ 160 N/mm2 23,000 psi
Surface compressive stress ≥ 100–140 N/mm2 14,500–20,000 psi
Parallelism ≤ 0.20 mm 0.008 inches
Flatness*) Diameter: up to 100 mm ≤ 0.05
above 100 up to 150 mm ≤ 0.08
above 150 up to 200 ≤ 0.12
above 200 mm ≤ 0.15
Thermal shock resistance Δ T 230° C  
Max. permissible temperature 300 °C 572 °F
Protected with mica 320 °C

608 °F

*) Measurements of flatness are taken only in the sealing area.

Dimensional tolerances

(acc. to DIN 7080)

Diameter

  • up to 150 mm ± 0.5 mm
  • 150 to 200 mm ± 0.8 mm
  • above 200 mm ± 1.0 mm


Thickness

  • up to 20 mm + 0.50 mm /– 0.25 mm
  • above 20 mm + 0.80 mm /– 0.40 mm

Calculation of glass thickness

(acc. to DIN 7080)

PRODUCT RANGE