A visual inspection window is a transparent panel installed on industrial equipment, allowing operators to observe internal conditions, meters, and components while maintaining a sealed enclosure. This feature is crucial in industries where contamination, safety hazards, and environmental exposure must be minimized.
Industries such as chemical processing, food and beverage, pharmaceuticals, and oil and gas greatly benefit from visual inspection windows. In chemical processing, these windows allow operators to monitor reactions without direct exposure to hazardous substances. The food and beverage industry relies on them to maintain hygiene standards by preventing contamination. Inpharmaceutical manufacturing, visual inspection windows ensure a controlled environment for drug production, reducing the risk of exposure to sensitive compounds. Meanwhile, in the oil and gas sector, they enhance safety by minimizing direct contact with volatile substances, ensuring a secure and efficient monitoring process.
At Douglass, we offer a range of visual inspection windows tailored to industrial needs. Our products are:
SIGHT GLASS WINDOW
Douglass flanged sight windows consist of three parts: the flange on the tank, 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’s flange, creating a “sandwich” assembly, hence the name “sandwich sight glasses.”
| Item | Part name | Material options |
|---|---|---|
| 1 | Allen Bolts |
|
| 2 | Flanges |
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| 3 | Gasket |
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| 4 | Sight Glass |
|
| ID | 3" | 7.5" | 2" | 4" | 9" | 2" | 5" |
|---|---|---|---|---|---|---|---|
| A (Visible Diameter) | 3" (76.20 mm) | 7.5" (190.50 mm) | 2" (50.80 mm) | 4" (101.6 mm) | 9" (230.00 mm) | 2" (50.80 mm) | 5" (127.00 mm) |
| B (Total Diameter) | 10" (255.00 mm) | 2.5" (63.50 mm) | 6" (152.40 mm) | 11" (280.00 mm) | 3" (76.20 mm) | 8" (203.20 mm) | 13.5" (345.00 mm) |
| C (Minimum Thickness) | 3.5" (88.90 mm) | 10" (254.00 mm) | 16" (405.00 mm) | 3.5" (88.90 mm) | 12" (304.80 mm) | 19" (485.00 mm) | 3.5" (88.90 mm) |
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