The pneumatic fluoropolymer-lined butterfly valve is an automated control valve that combines a pneumatic actuator with fluoroplastic lining technology. It is specifically designed for applications requiring highly corrosive media, rapid response, and remote operation. It uses compressed air to drive the valve plate to rotate, achieving media shut-off or regulation. It is widely used in automated process control in chemical, pharmaceutical, and environmental protection industries.
GNEE Group is a leading manufacturer of industrial valves, providing valve solutions and customization services to customers worldwide. B2B Valve Solutions – Submit Your Requirements!‌
Fluorine-Lined Pneumatic Butterfly Valve Technical parameters
Size Range: DN40–DN1000
Pressure Range: PN6–PN16
End Connection: Flanged or Wafer
Material: Carbon Steel/Fluorine-Lined
Seals: PTFE or FEP
Valves Design: Pneumatic Actuated Butterfly Valve
Face to Face: ISO 5752
Testing & Inspection: API 598 Standards
Suitable Medium: Corrosive liquids, gases, and chemical solutions
Fluorine-Lined Pneumatic Butterfly Valve Main Spare Part Bill of Materials
| Serial No. | Part Name | Grey Cast Iron (Z) | Carbon Steel (C) | Stainless Steel (P) | Stainless Steel (R) | Low Carbon Stainless Steel (PL) | Low Carbon Stainless Steel (RL) |
|---|---|---|---|---|---|---|---|
| 1 | Upper and Lower Body | HT250 | WCB | CF8 | CF8M | CF3 | CF3M |
| 2 | Disc | - | WCB | CF8 | CF8M | CF3 | CF3M |
| 3 | Butterfly Plates | 1Cr13 | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 00Cr18Ni10 | 00Cr18Ni14Mo2 |
| 4 | Lining Layer / Seat | PTFE (F4), PCTFE (F3), FEP (F46), PFA (optional F4), PO (Polyolefin) | |||||
| 5 | O-Ring | FPM (Fluorine Rubber/Viton) | |||||
| 6 | Spring Section (Pad) | Si (Silicone Rubber) | |||||
| 7 | Adjustment in Block | 0Cr18Ni9 | 0Cr18Ni9 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 00Cr18Ni10 | 00Cr18Ni14Mo2 |
| 8 | Bolt | 35 | 35 | 1Cr17Ni2 | 1Cr17Ni2 | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
| 9 | Nut | 45 | 45 | 0Cr18Ni9 | 0Cr18Ni9 | 0Cr18Ni9 | 0Cr18Ni9 |
| 10 | Handle | ZL 101 (Cast Aluminum Alloy) | |||||
Fluorine-Lined Pneumatic Butterfly Valve Structural Principle
- Pneumatic Actuator: Powered by compressed air, the pneumatic actuator (such as piston or rack and pinion type) converts air pressure into mechanical energy, driving the valve stem to rotate. The actuator can receive 4-20mA current signals or 0-10V voltage signals for remote automated control.
- Fluoroplastic Lining: The valve body, disc, and seat are lined with polytetrafluoroethylene (PTFE), perfluoroethylene propylene (FEP), or soluble polytetrafluoroethylene (PFA), typically ≥3mm thick, forming a corrosion-resistant barrier to isolate the medium from metal components.
- Disc Design: The disc is circular, rotating 90° around the valve shaft to open and close. The centerline sealing structure ensures the disc and seat are concentric within a 360° circumference, providing bidirectional sealing. Pressure and flow can be freely adjusted.
- Sealing System: Employing four-stage loading elastic sealing technology, the system utilizes a special transition curve at the connection between the shaft and disc, elastic O-rings, and a combination of metal gaskets to ensure zero leakage both internally and externally. Some models are equipped with adjustable elastic ball positioning, ensuring accurate positioning and a simple structure.
Fluorine-Lined Pneumatic Butterfly Valve Performance Advantages
- Strong Corrosion Resistance: The fluoroplastic lining can withstand extreme corrosive media such as concentrated sulfuric acid, hydrochloric acid, hydrofluoric acid, aqua regia, strong alkalis, and organic solvents. It has a wide applicable temperature range (PTFE: -20℃ to 150℃; PFA: -20℃ to 180℃).
- Excellent Sealing Performance: The soft seal (fluororubber + PTFE) structure achieves zero leakage. It maintains its sealing performance even after more than 50,000 pressurized opening and closing cycles, making it suitable for conveying high-purity and toxic media.
- Quick and Effortless Opening and Closing: Opening and closing can be completed with a 90° rotation of the butterfly plate. The opening and closing torque is small, requiring minimal effort, making it especially suitable for large-diameter valves.
- Precise Flow Regulation: By controlling the input signal of the pneumatic actuator, the butterfly plate opening can be precisely adjusted, achieving accurate percentage regulation of the media flow rate, meeting the needs of chemical reactor feed control, etc.
- Compact and lightweight: The wafer-type connection design saves space and reduces weight by 30% to 50% compared to flanged valves, facilitating installation and maintenance.
- Long service life: The fluoroplastic lining is anti-aging and wear-resistant, resulting in low maintenance costs, 5 to 10 times that of metal valves.
Fluorine-Lined Pneumatic Butterfly Valve Application
Chemical Industry: Used for conveying highly corrosive media such as sulfuric acid, hydrochloric acid, nitric acid, and sodium hydroxide; widely applied in reactor feeding and pipeline switching.
Pharmaceutical Industry: Controls the delivery of pharmaceutical solutions, meeting the requirements for media purity and corrosion resistance to ensure drug quality.
Environmental Protection Industry: Regulates fluid flow, pressure, and temperature in wastewater treatment plants and industrial circulating water systems to ensure stable system operation.
Power Industry: Transports and controls media in power equipment cooling water systems and chemical water treatment systems to prevent corrosion and leakage.
Food and Beverage Industry: Transports food-grade media, meeting hygiene standards and ensuring product safety.
Fluorine-Lined Pneumatic Butterfly Valve factory
Fast Shipping Worldwide – Check Valve Availability!‌