Our Products
DIN 7079 Metal Fused Sight Glass Type 77 for Sight Flow Indicator
DIN 7079 Metal Fused Sight Glass Type 77 is designed for sight flow indicators in industrial pipelines. The glass-to-metal fused structure provides excellent pressure resistance, impact protection and long service life.
Non binding • Usually a response within 24 hours
Certified quality
Technical data
DIN 7079 Metal Fused Sight Glass Type 77
The Metal Fused Sight Glass Type 77 is specially designed for DIN connection sight flow indicators, providing a safe and reliable solution for visual monitoring of liquid and gas flow in industrial pipelines.
Unlike conventional loose glass discs, the glass is permanently fused into a metal ring according to DIN 7079, creating a pre-stressed structure with enhanced mechanical strength and safety performance.
The sight glass uses high-quality borosilicate glass according to DIN 7080 / DIN 7079, offering excellent thermal shock resistance and optical clarity. It is widely used in chemical, pharmaceutical, food processing, petrochemical and industrial process systems.
The fused metal structure eliminates the risk of sudden glass failure and provides reliable operation under high pressure, high temperature and demanding industrial conditions.
Technical Specification Table
| Parameter | Specification |
|---|---|
| Product Type | Metal Fused Sight Glass |
| Model | Type 77 |
| Application | Sight Flow Indicator |
| Standard | DIN 7079 |
| Glass Material | Borosilicate Glass DIN 7080 |
| Structure | Glass Fused into Metal Ring |
| Connection Type | DIN Flow Indicator Connection |
| Pressure Rating | Up to 64 bar |
| Operating Temperature | -60°C to +300°C (depending on material) |
| Glass Diameter | Customized |
| Ring Material | Carbon Steel / Stainless Steel / Duplex / Alloy |
| Surface Treatment | Polishing Available |
| Certificate | EN10204 3.1 Available |
Materials Options
| Component | Available Materials |
|---|---|
| Glass | Borosilicate Glass DIN 7080 |
| Metal Ring | Carbon Steel |
| Metal Ring | Stainless Steel 1.4462 |
| Metal Ring | Hastelloy 2.4602 / 2.4610 |
| Certificate | EN10204 3.1 |
DIN 7079 Metal Fused Sight Glass Type 77—Drawing
Type 77 Standard Dimensions
| DN | Glass Diameter d1 (mm) | Viewing Diameter d2 (mm) | Thickness S (mm) |
|---|---|---|---|
| DN15 | 45 | 25 | 10 |
| DN20 | 45 | 25 | 10 |
| DN25 | 63 | 35 | 10-20 |
| DN40 | 80 | 45 | 10-22 |
| DN50 | 100 | 55 | 12-28 |
| DN65 | 100 | 55 | 12-28 |
| DN80 | 125 | 65 | 15-30 |
| DN100 | 150 | 70 | 20-32 |
| DN125 | 175 | 80 | 20-35 |
| DN150 | 200 | 100 | 25-40 |
KEY FEATURES
Metal Fused Structure
Glass permanently fused into a metal ring for enhanced safety and reliability.
High Pressure Resistance
Designed for demanding applications with pressure ratings up to 64 bar.
Thermal Stability
Excellent resistance to thermal shock for extreme temperature environments.
DIN 7079 Standard
Manufactured according to DIN 7079 requirements for sight glass applications.
High Transparency
Borosilicate glass provides clear and accurate flow observation.
Long Service Life
Strong construction ensures durability under harsh industrial conditions.
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:A metal fused sight glass is manufactured by permanently bonding glass with a metal ring, creating a stronger and safer structure than traditional loose glass windows.
A:Type 77 provides higher mechanical strength, better impact resistance and improved safety compared with conventional sight glass discs.
A:The standard glass material is borosilicate glass according to DIN 7080 / DIN 7079, offering excellent transparency and thermal resistance.
A: Yes. Depending on size and material selection, Type 77 can be designed for high pressure applications up to 64 bar.
A: Yes. Material certificates are available for metal components according to customer requirements.
Need Custom DIN 7079 Metal Fused Sight Glass Type 77 for Sight Flow Indicator Solutuions?
Send us your drawings or technical requirements for fast quotation and engineering support.