Our Products
Stainless Steel Square Straight-Through Sight Glass
The Stainless Steel Square Straight-Through Sight Glass is designed for direct visual monitoring of liquids, gases, and process media flowing through industrial pipelines. Featuring a robust square-body construction and full-bore straight-through design, it provides maximum flow efficiency, excellent visibility, and long-term durability in demanding industrial environments.
Non binding • Usually a response within 24 hours
Certified quality
Technical data
Stainless Steel Square Straight-Through Sight Glass for Pipeline Flow Observation
The Stainless Steel Square Straight-Through Sight Glass is engineered to provide clear and continuous visual inspection of fluids, gases, and process media flowing through industrial pipeline systems.
Its square-body design offers enhanced structural rigidity and a larger viewing area compared to conventional round sight glasses. The straight-through full-bore construction minimizes flow restriction and pressure loss, making it ideal for applications requiring uninterrupted process flow.
Manufactured from high-quality stainless steel and fitted with durable transparent viewing windows, the sight glass allows operators to monitor fluid color, flow conditions, contamination, bubbles, sediment, and process performance in real time.
Available with ANSI, ASME, DIN, JIS, and customized flange standards, the sight glass can be integrated into a wide range of industrial piping systems. Glass materials include borosilicate glass, tempered glass, fused quartz, and other specialized transparent materials depending on temperature, pressure, and media requirements.
The Stainless Steel Square Straight-Through Sight Glass is widely used in chemical processing, pharmaceutical production, food and beverage manufacturing, petrochemical plants, water treatment facilities, and industrial utility systems.
Stainless Steel Square Straight-Through Sight Glass — Technical Data
| Parameter | Value / Standard |
|---|---|
| Size | DN15 ~ DN500 |
| Production Process | Integral Casting/ Welding |
| Shell material | Carbon steel, Stainless steel, Carbon steel lined with fluorine, Ti |
| Window material | Soda-lime glass, Borosilicate glass, Quartz glass, Aluminosilicate Glass |
| Sealing ring material | Nitrile rubber gasket, PTFE gasket, Graphite composite gasket, Compressed fiber gasket |
| Working temperature | Soda-lime glass installed up to 150°C; Borosilicate glass installed up to 280°C |
| Operating pressure | PN0.6~2.5Mpa（Max 2500LB） |
| Connection mode | Flange / Thread/Tri-clamp |
Stainless Steel Square Straight-Through Sight Glass -Dimensions
| ANSI | D | BL (DIN F1) | d1 | Glasplatte | |||
|---|---|---|---|---|---|---|---|
| 150 lbs | 300 lbs | d2 | s (16 bar) | s (40 bar) | |||
| 1/2″ | 89 | 95,2 | 130 | 32 | 45 | 10 | 10 |
| 3/4″ | 98 | 117,3 | 150 | 32 | 45 | 10 | 10 |
| 1″ | 108 | 123,8 | 160 | 48 | 63 | 10 | 15 |
| 1 1/4″ | 118 | 133,4 | 180 | 48 | 63 | 10 | 15 |
| 1 1/2″ | 127 | 155,6 | 200 | 65 | 80 | 12 | 20 |
| 2″ | 152 | 165,1 | 230 | 80 | 100 | 15 | 25 |
| 2 1/2″ | 178 | 190,5 | 290 | 80 | 100 | 15 | 25 |
| 3″ | 191 | 209,9 | 310 | 100 | 125 | 20 | 30 |
| 4″ | 228* | 254,0 | 350 | 125 | 150 | 25 | 32 |
| 5″ | 254* | 279,4 | 400 | 150 | 175 | 25 | a. A. |
| 6″ | 279 | 317,5 | 480 | 175 | 200 | 30** | a. A. |
| 8″ | 343* | 381,0 | 600 | 175 | 200 | 30** | a. A. |
| 10″ | See Lumistar Model 112-A | ||||||
KEY FEATURES
Full-Bore Straight-Through Design
High resistance to thermal shock for extreme temperature environments
Large Viewing Area
Square housing design offers improved visibility for monitoring process conditions.
Stainless Steel Construction
Available in SS304, SS316L, Duplex Stainless Steel, and other corrosion-resistant materials.
Excellent Pressure Resistance
Suitable for industrial pressure systems with customized pressure ratings available.
Superior Corrosion Resistance
Designed for aggressive chemicals, water treatment systems, and process media.
Multiple Viewing Window Materials
Available with borosilicate glass, quartz glass, tempered glass, and sapphire glass options.
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: It is an inline pipeline viewing device that allows operators to visually monitor fluid flow and process conditions without interrupting operation.
A:The straight-through design minimizes pressure drop and flow restriction while maintaining clear visibility.
A:Housing materials include:SS304,SS316L,Duplex Stainless Steel,Carbon Steel,Hastelloy®
A: Yes. Pressure ratings can be customized according to process requirements.
A:Yes. Material selection can be optimized for acids, alkalis, solvents, seawater, and other aggressive media.
Need Custom Stainless Steel Square Straight-Through Sight Glass Solutuions?
Send us your drawings or technical requirements for fast quotation and engineering support.