Douglass

Flat Quartz Sight Glass

All those requirements up to a maximum of 1450ºC and thermal shocks of up to 500ºC. The sight glasses are manufactured in diameters up to 8″ and thicknesses up to 1 ½”, square, rectangular and oblong shapes, with holes as required, conical or special bevel shapes.

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All those requirements up to a maximum of 1450ºC and thermal shocks of up to 500ºC. The sight glasses are manufactured in diameters up to 8″ and thicknesses up to 1 ½”, square, rectangular and oblong shapes, with holes as required, conical or special bevel shapes.

The main uses are:

  • Applications in ovens
  • Applications in burners
  • Processes where the constant temperature is greater than 500°C.
Type of Crystal Quartz (Min Silica 96%)
Manufacturing parameters Minimum manufacturing thickness 3 mm
Maximum manufacturing thickness 50 mm
Minimum manufacturing diameter 10 mm
Maximum manufacturing diameter 400 mm
Operating parameters Maximum constant working temperature 500°C
Maximum short-term temperature 560°C
Resistance to thermal shock 500 K
Maximum working pressure Depending on thickness
Chemical properties Hydrolytic resistance HGB 1 (ISO 719)
Acid resistance Class S1 (ISO 1776)
Chemical composition Alkaline resistance Class A2 (ISO 695)
SiO2 Minimum 96% content
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