Quality Borosilicate Flat Glass Circles In Stock
- Annealed Borosilicate (Clear): For general service up to 446°F (230°C). Use 1/4" or thicker glass; max 150°F temperature differential.
- Tempered Borosilicate (Clear): Handles up to 500°F (260°C) and higher pressure than annealed. Not for corrosive or extreme thermal shock environments.
- Cobalt Blue Borosilicate (Blue): Reduces glare for clear flame, smoke, and ash observation in boilers and furnaces. Up to 1/4" thick.
- Fused Quartz (Clear): Ideal for labs and high-temp industrial use; continuous operation up to 1742°F (950°C). Optical grade available on request.
- Applications: Furnaces, ovens, observation ports, flow indicators, pressure vessels, and tanks.
- Tempering Benefits: Enhances strength, scratch resistance, and thermal shock durability.
Other Recommended Products:
Maxos® Borosilicate Replacement Sight Glass | Boiler Supplies 
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