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DIN 28120 Sight Glass with Wiper
DIN 28120 Sight Glass with Wiper is a round weld-on sight glass designed for visual inspection of process vessels, tanks and other industrial equipment. The integrated mechanical wiper helps remove deposits from the glass surface during operation, maintaining a clear viewing area without dismantling the sight glass.
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Technical data
DIN 28120 Sight Glass with Wiper Overview
The DIN 28120 Sight Glass with Wiper is a vessel sight glass designed for visual inspection of liquids, gases, powders and other process media inside tanks, reactors and industrial vessels. Based on the DIN 28120 standard, the sight glass provides a standardized installation solution for process equipment while allowing operators to monitor the internal condition of the vessel directly.
This sight glass is equipped with an integrated mechanical wiper, which allows the glass viewing surface to be cleaned when deposits, condensation, dust or process residues reduce visibility. The wiper can be operated manually from outside the vessel, helping maintain a clear viewing area without requiring the sight glass to be removed from the equipment.
The viewing window is typically manufactured from borosilicate glass, offering good optical clarity and resistance to thermal shock and many industrial process conditions. Depending on the application, LUMISTAR can provide different gasket and metal material options to suit the process medium, temperature and pressure requirements.
DIN 28120 Sight Glass with Wiper — Technical Data
| Item | Specification |
|---|---|
| Product Type | DIN 28120 Sight Glass with Wiper |
| Design Standard | DIN 28120 |
| Nominal Size | DN50, DN80, DN100, DN125, DN150, DN200 |
| Pressure Rating | PN10 / PN16 depending on size |
| Glass Material | Borosilicate Glass DIN 7080 |
| Viewing Diameter | 80‑225 mm |
| Glass Diameter | 100‑250 mm |
| Body Material | Stainless Steel / Carbon Steel |
| Wiper Type | Mechanical Wiper / Scraper |
| Wiper Material | PTFE, Silicone or other materials |
| Gasket | PTFE, Graphite, Klingersil, EPDM or customized |
| Temperature | Up to approx. 280°C with suitable borosilicate glass and gasket configuration |
| Installation | Weld‑on |
| Application | Tanks, Vessels, Reactors, Separators and Process Equipment |
DIN 28120 Round Vessel Sight Glass— Drawing
DIN 28120 Round Vessel Sight Glass— Dimension
| DN | Viewing Diameter d1 | Glass Diameter d3 | Flange OD D | Bolt Quantity | Bolt Size |
|---|---|---|---|---|---|
| DN50 | 80 mm | 100 mm | 165 mm | 4 | M16 |
| DN80 | 100 mm | 125 mm | 200 mm | 8 | M16 |
| DN100 | 125 mm | 150 mm | 220 mm | 8 | M16 |
| DN125 | 150 mm | 175 mm | 250 mm | 8 | M16 |
| DN150 | 175 mm | 200 mm | 285 mm | 8 | M20 |
| DN200 | 225 mm | 250 mm | 340 mm | 8 | M20 |
KEY FEATURES
DIN 28120 Dimensions
Designed according to standard DIN 28120 installation dimensions.
Integrated Mechanical Wiper
Helps clean the glass surface during operation.
Clear Process Observation
Provides direct visual inspection of vessels and tanks.
Borosilicate Glass
DIN 7080 borosilicate glass is available for demanding applications.
Stainless Steel Construction
Suitable for industrial and process equipment.
Customizable Configuration
Different glass, gasket, material and wiper options are available.
Custom Manufacturing Service
We provide tailor-made solutions according to drawings or technical requirements.
- Custom diameter
- Custom thickness
- Special pressure design
- Edge polishing
- Optical finishing
- OEM / ODM support
- Custom packaging
TYPICAL APPLICATIONS
- Pressure Vessels
- Chemical Reactors
- Boilers & Steam Systems
- Pipeline Sight Glass Assemblies
- Pharmaceutical Equipment
- Food & Beverage Processing
- Industrial Observation Ports
FAQ
A: DIN 28120 is a round weld-on sight glass design used for visual inspection of industrial vessels and tanks.
A:Yes. A mechanical wiper can be integrated into a DIN 28120 sight glass to help clean the glass surface during operation.
A: Borosilicate glass according to DIN 7080 is commonly used. Other glass materials can also be supplied according to application requirements.
A:Yes. Wiper blades can be supplied in materials such as PTFE or silicone, depending on the process medium and operating conditions.
A: Yes, optional accessories include LED lights, cleaning wipers, and explosion-proof illumination systems.
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