Double Window Sight Glass Indicator
Double Window Sight Glass Indicators are designed for direct visual observation of liquid flow inside pipelines. They feature two toughened borosilicate glass windows positioned opposite each other, allowing clear flow visibility, direction monitoring, and assessment of fluid color and clarity.
These units are suitable for vertical pipelines and can also be installed in horizontal lines where no external mechanical stress is applied. The robust CS/SS/PP body construction combined with toughened glass makes the indicator highly durable and suitable for high-temperature, high-pressure, and full vacuum applications.
Product Share on :Applications
- Observation of liquid flow in pipelines
- Monitoring flow rate, direction, clarity & color
- Chemical, petrochemical & process industries
- Pharmaceutical & food processing lines
- Water, effluent & general fluid handling systems
Construction
The Double Window Sight Glass consists of a cast/SS/PP body fitted with two toughened borosilicate glass windows on opposite sides. The assembly uses PTFE or Silicon gaskets to ensure leak-proof sealing. High-strength fasteners (SS/A193/A194) hold the unit firmly, enabling reliable operation under high temperature & pressure conditions. Available in flanged or threaded end connections as per ANSI/BS/DIN/IS/JIS standards.
Key Features
- Design & testing as per manufacturing standards
- End connections as per ANSI B16.5 / BS10 / DIN / IS / JIS
- Suitable for high-pressure, high-temperature & vacuum applications
- Material & pressure test certificates available on request
- Available in a wide range of sizes & material combinations
Technical Specifications
| Glass | Toughened Borosilicate Glass |
|---|---|
| Body MOC | CS / SS304 / SS316 / SS316L / PP |
| Packing Material | PTFE / Silicon |
| Process Flange | As per requirement |
| Max. Temperature | 70°C (PP) / 200°C (Metallic) |
| Max. Hydro Pressure | 3 kg/cm² (PP) / 20 kg/cm² (Metallic) |
Available Sizes – Class 150#
| Size (DN) | 15 | 20 | 25 | 40 | 50 | 65 | 80 | 100 |
|---|---|---|---|---|---|---|---|---|
| FF (mm) | 150 | 150 | 150 | 180 | 200 | 210 | 235 | 265 |
| OD (mm) | 88.9 | 98.4 | 107.9 | 127 | 152.4 | 177.8 | 190.5 | 228.6 |
| PCD (mm) | 60.3 | 69.9 | 79.3 | 98.4 | 120.6 | 139.7 | 152.4 | 190.5 |
| RF (mm) | 34.9 | 42.8 | 50.8 | 73 | 92 | 104.7 | 127 | 157.1 |
| Hole Dia. | 15.8 | 15.8 | 15.8 | 15.8 | 19 | 19 | 19 | 19 |
| No. of Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 8 |
| Visibility (V) | 30 | 30 | 30 | 45 | 55 | 65 | 75 | 100 |
Model Identification
- DGI-A/B/C/D/E/F/G/H – Process connection size (15 NB to 100 NB)
- MOC: 1–CS, 2–SS304, 3–SS316, 4–SS316L, 5–PP
- Packing: S–Silicon, P–PTFE
