The flanged fluoropolymer-lined butterfly valve uses a fluoropolymer-lined butterfly plate with a spherical sealing surface, coupled with a silicone rubber gasket at the valve seat base to regulate the valve's sealing performance. This valve is easy to operate, provides a tight seal, and extends its service life. It can be used for quick shut-off or flow regulation. It is suitable for applications requiring reliable sealing and good regulating characteristics.
The valve body is of a split type; the seal at the valve shaft end is controlled by fluoropolymer rubber on the rotating base surface between the butterfly plate and the valve seat, resulting in a compact structure, beautiful appearance, reasonable manufacturing process, and reliable performance. It ensures that the valve shaft does not come into contact with the fluid medium inside the cavity, making valve shaft replacement very convenient; the valve can be replaced without disassembling the pipeline.
The product is widely applicable to the transportation of liquids and gases (including steam) in various types of industrial pipelines, especially in applications with highly corrosive media such as sulfuric acid, hydrofluoric acid, phosphorus, acids, sulfuric acid, strong alkalis, and aqua regia.
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Flanged PTFE-lined butterfly valve Technical parameters
Size Range: DN40–DN1200
Pressure Range: PN6–PN25
End Connection: Flanged / Wafer / Lug
Material: Ductile Iron / Carbon Steel Body with PTFE Lining
Seals: PTFE/FEP
Valves Design: Fluorine-Lined Centered or Eccentric Butterfly Valve
Face to Face: ISO 5752 / API 609
End Connection: ASME B16.5, EN 1092-1
Testing & Inspection: API 598, ISO 5208
Suitable Medium: Strong Acids, Alkalis, and Corrosive Media
Flanged PTFE-lined butterfly valve Features
- High corrosion resistance: The fluoroplastic lining can withstand strong corrosive media such as concentrated sulfuric acid, hydrochloric acid, and sodium hydroxide, and is suitable for conveying a variety of chemical solutions.
- Excellent sealing performance: The four-level sealing structure ensures zero leakage, and the leakage level meets the ANSI B16.104 Class VI standard.
- Flexible and convenient to operate: The drive unit has a fast response speed and supports remote control and automated operation. The disc can stop at any position, enabling flow regulation.
- Highly adaptable to different installation requirements: The extended flange design can accommodate installation needs with different pipe spacings, making it suitable for complex working conditions.
- Low maintenance costs: The seals are replaceable, have a long service life, and have low long-term operating costs.
Material Configuration Table for Butterfly Valve Components
| Serial No. | Part Name | Grey cast iron | Carbon Steel | Stainless Steel | Low carbon stainless steel | ||
|---|---|---|---|---|---|---|---|
| Z | C | P | R | PL | RL | ||
| 1 | Upper and lower body | HT250 | WCB | CF8 | CF8M | CF3 | CF3M |
| 2 | Butterfly Plates | 1Cr13 | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 00Cr18Ni10 | 00Cr18Ni14Mo2 |
| 3 | Lining layer / Seat | PTFE (F4), PCTFE (F3), FEP (F46), PFA (Melt-processable F4), PO (Polyolefin) | |||||
| 4 | Disc / Packing gland | WCB | WCB | CF8 | CF8M | CF3 | CF3M |
| 5 | Support | WCB (Carbon Steel) | CF8 (Stainless Steel) | ||||
| 6 | Filler | PTFE (F4) | |||||
| 7 | Bolt | 35CrMo | 35CrMo | 1Cr17Ni2 | 1Cr17Ni2 | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
| 8 | Nut | 45 | 45 | 0Cr18Ni9 | 0Cr18Ni9 | 0Cr18Ni9 | 0Cr18Ni9 |
Flanged PTFE-lined butterfly valve External connection dimensions
Flanged PTFE-lined butterfly valve Applications:
- Chemical Industry: Used for conveying concentrated sulfuric acid, hydrochloric acid, sodium hydroxide, and other chemical solutions, replacing stainless steel valves to reduce costs.
- Pharmaceutical and Food Industry: Meets FDA standards for conveying ultrapure water and chemical solutions, preventing metal ion contamination.
- Environmental Engineering: Used in wastewater treatment for acid-base neutralization pipelines, resistant to drastic pH changes.
- Petroleum Industry: Used in catalytic cracking units of oil refineries for acidic gas pipelines, resistant to hydrogen sulfide corrosion.
