Quartz Sight Glass

QUARTZ CIRCULAR SIGHT GLASS  

Manufactured in Quartz Glass, these sight glasses are used in several applications where the operating temperature ranges above 1000F, and thermal shock is greater than 280 F 

Special dimensions of glasses are available upon request, where the minimum diameter is 10mm, and the maximum diameter is 350mm. The thickness can be manufactured to a minimum of 3mm and a maximum of 25mm. Do not hesitate to contact us for recommendations as to which sight glass fits your application the best. 

Please do not hesitate to contact us for any inquiry you may have, we would be happy to provde you with prices for specific requests.

TECHNICAL INFORMATION:

FUSED SILICA 99%

CHEMICAL ATTACK ON GLASS

The extent to which glass in boiler sight glasses is attacked when exposed to aqueous media will normally increase exponentially as the temperature and pH of the medium rises and the attack may be considerably accelerated by chemical additives such as those used in various ways and amounts in water treatment plants.
The resultant severe erosion and consequential dimensional changes may endanger the working safety of the sight glass and may result in rupture. The most important influencing variables are, however, the pH and temperature, but, for other complex reasons, the temperature plays a major role at temperatures markedly above 200 °C. To illustrate this, the figure below shows the erosion of a glass surface at 170 °C for two different pH levels, while the broken line shows the effect of increasing the temperature to 220 °C at a pH of 10 under laboratory conditions.