Flange-Lined Butterfly Valve
Nominal Diameter: DN50~1000mm
Nominal Pressure: PN0.6~1.6MPa
Applicable Media: Various Corrosive Media
Applicable Temperature: ≤150°C
Flange-Lined Butterfly Valve
The Flange-Lined Butterfly Valve is a high-performance quarter-turn valve specifically designed for handling highly corrosive, abrasive, and aggressive media. The valve body and disc are fully lined with fluoropolymer materials such as PTFE, PFA, FEP, or ETFE, providing exceptional resistance to acids, alkalis, solvents, and other corrosive chemicals.
Featuring a flanged connection design, the valve ensures secure installation, excellent sealing performance, low operating torque, and reliable bidirectional shut-off. Its lightweight structure, compact design, and excellent corrosion resistance make it an ideal solution for chemical processing, water treatment, pharmaceutical, petrochemical, and environmental protection industries.
As a professional industrial valve manufacturer, we provide comprehensive OEM and ODM solutions to meet global market requirements.
Body Materials
Disc Materials
Lining Materials
Seat Materials
Our products are manufactured in accordance with international quality and industrial standards.
Parameter Specifications
| Item | Specification |
|---|---|
| Product Name | Flange-Lined Butterfly Valve |
| Valve Type | Fluorine-Lined Butterfly Valve |
| Nominal Size | DN50–DN2000 (2"–80") |
| Pressure Rating | PN6–PN25 / ANSI Class 150–300 |
| Body Material | Ductile Iron, Carbon Steel, SS304, SS316 |
| Disc Material | Stainless Steel, Lined Ductile Iron |
| Lining Material | PTFE, PFA, FEP, ETFE, PVDF |
| Seat Material | PTFE, RPTFE, EPDM, NBR, Viton |
| Connection Type | Double Flanged |
| Flange Standard | ANSI, ASME, DIN, EN, JIS, GB |
| Operation Type | Lever, Gear, Pneumatic, Electric |
| Operating Temperature | -40°C to +180°C |
| Maximum Working Pressure | Up to 2.5 MPa |
| Leakage Rate | ISO 5208 Rate A / Zero Leakage |
| Flow Direction | Bi-Directional |
| Stem Material | SS304, SS316 |
| Design Standard | API 609, EN 593 |
| Face-to-Face Standard | EN 558, API 609 |
| Inspection & Testing | API 598, EN 12266 |
| Surface Coating | Epoxy Coating, Anti-Corrosion Coating |
| Applicable Media | Acids, Alkalis, Solvents, Water, Chemicals |
Industry Applications
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
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