A round sight glass can be manufactured from different types of glass depending on the operating conditions. Common materials include tempered borosilicate glass, quartz glass, and tempered soda lime glass.

Jinan JSV Industrial Co., Ltd. supplies custom round sight glass discs and circular sight glass windows for industrial equipment manufacturers, process equipment manufacturers, tank manufacturers, pharmaceutical equipment, chemical equipment, lighting equipment, and other applications.

Main Materials for Round Sight Glass

The correct glass material depends on temperature, thermal shock, chemical exposure, pressure, transparency, and other operating requirements.

1. Tempered Borosilicate Glass Sight Glass

Tempered borosilicate glass is one of the important choices for industrial sight glass applications.

Borosilicate glass has a relatively low coefficient of thermal expansion and good resistance to thermal shock. After tempering, the glass can provide improved mechanical strength compared with annealed glass of the same material and thickness.

2. Quartz Glass Sight Glass

Quartz glass, also known as fused silica, is selected for applications requiring excellent high-temperature performance, high optical transmission in selected wavelength ranges, and strong resistance to many chemicals.

Quartz glass is particularly useful when ordinary glass cannot meet the required temperature or optical performance.

3. Tempered Soda Lime Glass Sight Glass

Tempered soda lime glass is an economical option for many general-purpose sight glass applications where extreme temperature resistance is not required.

Soda lime glass provides good transparency and can be tempered to improve mechanical strength and resistance to thermal stress.

For applications with moderate operating temperatures and general mechanical requirements, tempered soda lime glass can provide a cost-effective solution.

Round Sight Glass Applications

Round sight glasses are widely used because their circular shape is convenient for installation in many equipment designs.

1. Industrial Process Equipment

Round sight glasses can be installed on industrial process equipment to provide a visual observation point.

2. Pressure Vessels

A round sight glass window can be used as an observation window on selected pressure vessels.

The glass specification must be designed according to the pressure, temperature, diameter, thickness, mounting structure, gasket, and applicable engineering requirements.

3. Reactors and Reaction Vessels

A round sight glass for reactor allows operators to observe the reaction process without opening the vessel.

4. Storage Tanks and Process Tanks

Round sight glass windows can be used on tanks to provide visual access to the interior.

The viewing window can help operators observe the material inside the tank and identify abnormal conditions.

5. Boiler and Thermal Equipment

For selected boiler and thermal equipment applications, heat-resistant glass can be used as an observation window.

Borosilicate sight glass is particularly useful for applications involving temperature changes.

For very high-temperature applications, quartz glass sight windows may be considered.

Custom Round Sight Glass

Jinan JSV Industrial Co., Ltd. can supply custom round sight glass discs and circular glass windows according to customer drawings, samples, specifications, or application requirements.

Available customization can include:

· Outside diameter

· Thickness

· Surface finish

· Edge grinding

· Polishing

· Beveling

· Drilling

· Special shapes

· Tempering

Different glass materials can also be selected according to the customer’s requirements.