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ANSI Three-Way Sight Glass
The ANSI Three-Way Sight Glass is designed for visual observation of fluids at pipeline junctions, branching lines, and mixing points. Its T-shaped configuration allows operators to monitor flow behavior, media conditions, and process performance while maintaining efficient flow distribution within industrial systems.
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Technical data
ANSI Three-Way Sight Glass for Pipeline Junction Monitoring
The ANSI Three-Way Sight Glass is specifically designed for applications where process media are diverted, mixed, distributed, or transferred through T-shaped pipeline configurations.
The integrated viewing windows provide direct observation of flow behavior at critical junction points, allowing operators to monitor liquid movement, gas flow, product color, contamination, foam formation, sediment, and process consistency.
Manufactured from premium stainless steel and fitted with high-strength transparent viewing windows, the sight glass delivers excellent corrosion resistance, mechanical durability, and long service life in demanding industrial environments.
Window materials are available in borosilicate glass, tempered safety glass, fused quartz glass, and sapphire glass to meet various pressure, temperature, and chemical compatibility requirements.
The ANSI Three-Way Sight Glass is widely used in chemical processing, pharmaceutical production, food and beverage systems, petrochemical plants, water treatment facilities, and industrial utility networks.
ANSI Three-Way Sight Glass— Technical Data
| Item | Description |
|---|---|
| Flange Standard | The flange connection complies with DIN-PN16; PN25; PN40; |
| Use | For visual inspection of filling and flow in pipelines. Lumistar optical lenses enable reliable monitoring of the function and performance of individual devices as well as whole plants |
| Operating conditions | Operating pressure : 16 to 40 bar Operating temperature : 150°or 280°C |
| Installation position | any |
ANSI Three-Way Sight Glass— Technical Advantages
| Feature | Benefit |
|---|---|
| Three-Way Design | Observation of branch flow |
| ANSI Flanged Connection | Easy installation |
| Stainless Steel Housing | Corrosion protection |
| Large Viewing Area | Better visibility |
| Multiple Glass Materials | Application flexibility |
| Pressure-Rated Construction | Industrial reliability |
| Compact Design | Space-saving installation |
| Long Service Life | Reduced maintenance cost |
ANSI Three-Way Sight Glass— Drawing


| DN | L | L₁ | d₁ | d₂ |
|---|---|---|---|---|
| 15 | 130 | 65 | 32 | 45 |
| 20 | 150 | 75 | 32 | 45 |
| 25 | 160 | 80 | 48 | 63 |
| 32 | 180 | 90 | 48 | 63 |
| 40 | 200 | 100 | 65 | 80 |
| 50 | 230 | 115 | 80 | 100 |
| 65 | 290 | 145 | 80 | 100 |
| 80 | 310 | 155 | 100 | 125 |
| 100 | 350 | 175 | 125 | 150 |
| DN 125-250 available on request. | ||||
KEY FEATURES
Multi-Directional Flow Observation
Provides clear visibility at pipeline junctions.
Excellent Optical Transparency
Improves process monitoring and inspection.
High Mechanical Strength
Suitable for demanding industrial conditions.
Excellent Transparency
Clear visibility for process monitoring
High Mechanical Strength
Suitable for demanding industrial conditions.
Flexible Installation
Suitable for horizontal and vertical piping systems.
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: The center hole is commonly used for mounting wipers, sensors, probes, or special accessories while maintaining visibility inside the vessel.
A:It allows observation of flow distribution, mixing, and branching operations from a single installation point.
A: Yes. Pressure ratings can be customized according to project requirements.
A: Yes. Material selection can be optimized for acids, alkalis, solvents, and aggressive process media.
A: Yes, optional accessories include LED lights, cleaning wipers, and explosion-proof illumination systems.
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