The oval weldable sight glasses are devices installed on tanks and pressure vessels to allow for the visualization of the contents and processes occurring inside the tank. The oval shape of the sight glass provides a wide viewing area, enabling operators to more easily inspect the tank’s contents and internal processes.
Oval Tank sight glass – Applications
These sight glasses are especially useful in food and beverage processing, as well as in the pharmaceutical, chemical, and other industries where direct observation of the tank’s contents is crucial for controlling and monitoring the process.

Item | Part name | Material options |
---|---|---|
1 | Allen Bolts | Stainless Steel 316L Stainless Steel 304 |
2 | Cover Flange | Stainless Steel 316L Stainless Steel 304 Carbon Steel w/ anti-corrosion coating |
3 | Stud bolt | Stainless Steel 316L Stainless Steel 304 |
4 | Gasket | Buna Neoprene Teflon Sanitary Rubber EPDM Viton |
5 | Sight Glass (max temp) | DIN7080 Tempored Borosolicate (280°C) Thermo tempered Polycarbonate Quartz |
6 | Weld Pad | Stainless Steel 316L Stainless Steel 304 Carbon Steel w/ anti-corrosion coating |
Oval Weldable Sight Glass for Tanks – Installation
The numbers in the following installation instructions refer to the diagram above. After correctly welding the base flange (5) to the wall of the vessel, assemble the gasket (3), the sight glass (4), the gasket (3), and the cover flange (2) in that order. Tighten the bolts (1) according to the torque values indicated in the technical information table (always tighten the bolts in diametrically opposite sets).
Benefits:
Improved Quality Control:
They allow for direct visual inspection, which can prevent quality issues before they escalate.
Operational Safety:
By enabling observation without the need to open the tank, the risk of exposure to hazardous substances is minimized.
Ease of Maintenance:
The weldability and robust design simplify the installation and maintenance of the sight glass.
Our tank sight glasses are designed to provide clear and precise visual inspection in industrial applications, offering efficient monitoring of fluid levels without interrupting processes. Made with high-quality materials, they ensure durability and resistance in demanding environments, making them a reliable option for any type of tank. Furthermore, their easy installation and maintenance provide a practical and efficient solution.
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