Mechanically pre-stressed Metaglas® windows are now available with glass coated metal, allowing no metal exposed to the product. Constructed of borosilicate glass fused with a dimensionally adapted glass coated metal frame-ring, this safety sight window constitutes an alternative to conventionally annealed or thermally pre-stressed (tempered) glass discs.
A principal advantage lies in the fact that the possibility of a sudden, unexpected rupture is totally excluded, and any crack that might develop, at worst, may slightly affect visibility. In addition to the unsurpassed pressure and impact resistance, the metal frame provides rigidity to prevent breakage in the event of uneven bolt tightening during installation.
