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White Paper

Compression vs. Fusion: The Source of Strength in Fused Sight Glasses for Chemical and Pharmaceutical Processes


Select the strongest and most reliable sight glass for process observation

Chemical and pharmaceutical processes require safety and reliability, particularly, with high-pressure environments. Sight glasses provide critical visibility into these processes, but not all sight glasses are created equally. A long-standing debate exists over what truly determines the strength of a fused sight glass: the fusion of glass to metal or the compression forces at play.

This white paper, Compression vs. Fusion: The Source of Strength in Fused Sight Glasses for Chemical and Pharmaceutical Processes, presents the science behind sight glass strength, analyzing:

  • The role of compression in strengthening glass and creating a leak-proof seal
  • The effects of different glass and metal combinations on sight glass performance
  • A detailed comparison between soda lime and borosilicate glass, as well as various metal alloys.

By reading this paper, you will gain:

  • A clear understanding of why compression, not fusion, dictates sight glass reliability
  • Key insights into how material selection affects pressure resistance and safety
  • Data-driven conclusions to help you select the best sight glass for your needs.

Download the white paper today to make informed, safety-driven decisions on sight glass selection for your processes.

LJ Star Incorporated (www.ljstar.com) provides an extensive line of process optimization equipment – sight glasses, lights, sanitary fittings, cameras and level gage instrumentation. Product lines include METAGLAS® Safety Windows, Lumiglas® Explosion Proof Lights and Cameras, the MetaClamp® Sanitary Sight Window, Visual Flow Indicators, Sight Ports, Sanitary Clamps, Magnetic Level Gages and Gage Glass. METAGLAS® is the #1 selling fused sight glass, proven in thousands of installations around the world. Unlike some other sight glasses, it meets stringent DIN 7079 and DIN 7080 quality standards, and it is approved for USP Type I use.

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© LJ Star Incorporated All rights reserved. METAGLAS® and METACLAMP® are registered trademarks of Herberts Industrieglas; Lumiglas® and LumiStar® are registered trademarks of F.H. Papenmeier GmbH & Co. KG; LumiFlo® and MetaPlex® are registered trademarks of LJ Star Incorporated.