The Iniflu flanged sight glasses with tank connection consist of three parts: the tank flange, the bottom flange, and the cover flange.
- The bottom flange, which is not welded, is designed with the same dimensions as a standard flange but adapted to accommodate bolts and glass.
- The cover flange maximizes the viewing area. Installation is simple, as the bottom flange is bolted directly to the tank flange, creating a “sandwich” style assembly, hence the name “sandwich-style sight glasses.”
Flanged Tank Sight Glasses – Key Features
Seamless Assembly for Easy Installation:
This sight glass eliminates the need for welding, making installation straightforward. The bottom flange bolts directly to the existing tank flange, creating a secure “sandwich” assembly. This feature greatly simplifies maintenance and replacement, avoiding the complexities and safety concerns associated with on-site welding, reducing installation time and labor costs.
Customizable Flexibility in Size and Material:
The sight glass can be manufactured to fit any flange size and is adaptable to a wide range of materials, including stainless steel, carbon steel, or special alloys that match the existing tank flange. This adaptability ensures that the sight glass can meet specific operational needs, including corrosive environments or sanitary applications, making it a versatile solution for various industries.
Pressure Resistance Virtually Unlimited:
The pressure resistance of the sight glass assembly depends largely on the specifications of the flange and the glass selected. By choosing a flange with greater pressure capacity and increasing the glass thickness, the assembly can be configured to withstand extremely high pressures. This modular approach allows the flanged tank sight glass to be used in demanding applications where pressure limitations would normally pose a restriction, ensuring safety and durability under harsh operating conditions.

Item | Part name | Material options |
---|---|---|
1 | Allen Bolts | Stainless Steel 316L Stainless Steel 304 |
2 | Flanges | Stainless Steel 316L Stainless Steel 304 Carbon Steel w/ anti-corrosion coating PTFE PVC Acrylic |
2 | Gasket | Buna Neoprene Teflon Sanitary Rubber EPDM Viton |
3 | Sight Glass | Tempered Borosilicate Sight Glass Tempered Soda Lime Sight Glass Polycarbonate Quartz |

TECHNICAL INFORMATION | |||
---|---|---|---|
ID | A (Visible Diameter) | B (Total Diameter) | C (Minimum Thickness) |
3″ | 3″ (76.20 mm) | 7.5″ (190.50 mm) | 2″ (50.80 mm) |
4″ | 4″ (101.6 mm) | 9″ (230.00 mm) | 2″ (50.80 mm) |
5″ | 5″ (127.00 mm) | 11″ (280.00 mm) | 2.5″ (63.50 mm) |
6″ | 6″ (152.40 mm) | 12″ (305.00 mm) | 3″ (76.20 mm) |
8″ | 8″ (203.20 mm) | 13.5″ (345.00 mm) | 3.5″ (88.90 mm) |
10″ | 10″ (254.00 mm) | 16″ (405.00 mm) | 3.5″ (88.90 mm) |
12″ | 12″ (304.80 mm) | 19″ (485.00 mm) | 3.5″ (88.90 mm) |
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.
At Iniflu, we value open and effective communication. If you have any questions or need additional information about our products and services, feel free to contact us. We are here to assist you and address your needs.