Tempered sight glass sheets are core components of observation windows in industrial equipment. They are made of high borosilicate glass or quartz glass as the substrate, and undergo physical or chemical tempering treatment to form a surface compressive stress layer, significantly enhancing their strength and heat resistance.
Core performance characteristics
1. High-strength impact resistance
Its impact resistance is 3-5 times that of ordinary glass, and its bending strength is 2-5 times that of ordinary glass, enabling it to withstand medium scouring and external object collisions during equipment operation.
2. Excellent thermal stability
It can withstand drastic temperature changes ranging from 200-300℃. Products made of high borosilicate substrate can withstand high temperatures up to 450℃, while those made of quartz substrate can even withstand temperatures above 1000℃.
3. Safe crushing characteristics
If it breaks, it will fragment into small particles without sharp edges or corners, preventing fragments from splashing and causing secondary injuries.
4. Strong chemical stability
Resistant to acids, alkalis, and organic solvents, suitable for use in corrosive media environments such as chemical and metallurgical industries.
Common specifications
Shape: Round (the most common, with diameters ranging from 20mm to 1000mm), square/rectangular (customizable)
Thickness: 2mm-30mm. The greater the thickness, the stronger the pressure resistance and impact resistance
Edge treatment: Typically involving edge grinding or chamfering, to enhance safety and sealing performance
Typical Applications
Chemical industry: observation windows for reactors, storage tanks, and pipelines
Energy industry: sight glasses for boilers and steam generators
Food and pharmaceutical industry: sight glasses for sanitary reactors and sterilization equipment
Metallurgical industry: Peep holes for high-temperature kilns and furnaces
Installation and maintenance tips
During installation, it is necessary to use flanges and sealing gaskets to ensure even stress distribution and avoid local compression that could lead to cracking.
After tempering, cutting and drilling are not allowed, and all processing must be completed before tempering.
Avoid long-term operation under excessive temperature and pressure, and regularly check the condition of the sealing gasket.
