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Fluoropolymer-Lined Sight Glass
The Fluoropolymer-Lined Sight Glass is designed for highly corrosive process media where conventional stainless steel sight glasses are unsuitable. Featuring PTFE or PFA lining, it provides outstanding chemical resistance while allowing safe visual inspection of flow conditions in demanding industrial applications.
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Technical data
Fluoropolymer-Lined Sight Glass | PTFE & PFA Lined Corrosion-Resistant Sight Glass
The Fluoropolymer-Lined Sight Glass is specifically engineered for chemical processing systems handling aggressive acids, alkalis, solvents, and other highly corrosive fluids. The internal wetted surfaces are lined with high-performance fluoropolymers such as PTFE or PFA, providing outstanding resistance to chemical attack while maintaining the mechanical strength of a stainless steel housing.
Combined with high-quality borosilicate, fused quartz, or sapphire viewing glass, the sight glass delivers reliable visual monitoring of process media under demanding operating conditions. It is widely used in chemical plants, pharmaceutical production, semiconductor manufacturing, water treatment, and other corrosion-sensitive industries.
Fluoropolymer-Lined Sight Glass— Technical Data
| Specification | Details |
|---|---|
| Product Name | Fluoropolymer-Lined Sight Glass |
| Body Material | Carbon Steel / SS304 / SS316 / SS316L |
| Lining Material | PTFE, PFA (Optional FEP upon request) |
| Viewing Window | Borosilicate Glass, Fused Quartz, Sapphire |
| Nominal Size | DN15–DN300 |
| Connection Type | Flanged |
| Flange Standard | DIN, ANSI, JIS, GB or Customized |
| Pressure Rating | PN10–PN40 (Higher ratings available upon request) |
| Operating Temperature | -20°C to 200°C (Depending on lining material) |
| Sealing Material | PTFE, Graphite, Viton, EPDM |
| Installation | Horizontal or Vertical Pipeline |
Fluoropolymer-Lined Sight Glass— Component Materials
| Component | Standard Material |
|---|---|
| Body | Carbon Steel |
| Flange | Carbon Steel |
| Lining | PTFE,PFA |
| Glas plate | Borosilicate to DIN 7080 |
| Gasket | PTFE, Graphite, Viton, EPDM |
| Bolts | A2-70 |
Fluoropolymer-Lined 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
Exceptional Chemical Resistance
PTFE or PFA lining protects against highly corrosive chemicals and aggressive process media.
Superior Optical Clarity
High-quality viewing glass ensures clear observation of fluid flow and process conditions.
Chemical Resistance
Stable performance in corrosive chemical environments
Excellent Thermal Stability
Suitable for demanding temperature conditions with excellent resistance to thermal cycling.
Leak-Free Sealing
Precision-engineered sealing system provides reliable and safe operation.
Custom Design Support
OEM / ODM customization 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:A fluoropolymer-lined sight glass features an internal PTFE or PFA lining that protects the metal body from aggressive chemicals while providing a clear viewing window for process monitoring.
A:PTFE offers excellent chemical resistance for most applications, while PFA provides similar corrosion resistance with improved flexibility, surface finish, and high-temperature performance.
A: It is suitable for sulfuric acid, hydrochloric acid, nitric acid, sodium hydroxide, chlorine compounds, solvents, and many other corrosive chemicals.
A: Standard options include borosilicate glass, fused quartz glass, and sapphire glass, selected according to operating temperature, pressure, and media compatibility.
A: Yes. We offer customized sizes, flange standards, lining materials, pressure ratings, and viewing window materials to meet specific application requirements.
RELATED PRODUCTS
| Component | Standard Material |
|---|---|
| Body | Carbon Steel |
| Flange | Carbon Steel |
| Lining | PTFE,PFA |
| Glas plate | Borosilicate to DIN 7080 |
| Gasket | PTFE, Graphite, Viton, EPDM |
| Bolts | A2-70 |
Need Custom Fluoropolymer-Lined Sight Glass Solutuions?
Send us your drawings or technical requirements for fast quotation and engineering support.