Pneumatic Fully Fluorine-Lined Butterfly Valve

The Pneumatic Fully Fluorine-Lined Butterfly Valve is a high-performance quarter-turn valve designed for reliable flow isolation and control in highly corrosive and chemically aggressive media. The valve body and internal wetted components are fully lined with high-quality fluoropolymer materials, providing excellent resistance to corrosion, chemicals, acids, alkalis, solvents, and other aggressive process fluids.

The valve is equipped with a pneumatic actuator, enabling fast, reliable, and automated operation. The actuator converts compressed-air energy into rotary motion to open or close the butterfly valve, making it suitable for remote operation and automatic process control systems.

The fully fluorine-lined design provides complete isolation between the process medium and the metal valve body, significantly improving corrosion resistance and extending service life. The resilient fluoropolymer seat and lining also provide reliable sealing performance, helping to minimize leakage and protect the valve from chemical attack.

Key Features

• Fully fluorine-lined body and wetted surfaces for superior corrosion resistance.
• Excellent resistance to strong acids, alkalis, salts, solvents, and other corrosive media.
• Pneumatic actuator for fast and reliable automatic operation.
• Compact and lightweight butterfly valve construction.
• Low operating torque and efficient quarter-turn operation.
• Reliable bubble-tight shut-off performance.
• Excellent sealing capability with reduced risk of process leakage.
• Suitable for remote control and automated process systems.
• Replaceable or serviceable actuator and valve components for convenient maintenance.
• Available with single-acting or double-acting pneumatic actuators.
• Optional accessories include solenoid valves, limit switches, positioners, air filters/regulators, and other control devices.

Applications

The Pneumatic Fully Fluorine-Lined Butterfly Valve is widely used in industries where corrosion resistance and reliable shut-off performance are required, including:

• Chemical processing
• Petrochemical industry
• Pharmaceutical manufacturing
• Chlor-alkali production
• Water and wastewater treatment
• Semiconductor and electronic industries
• Pulp and paper processing
• Mining and metallurgical industries
• Acid and alkali handling systems
• Corrosive gas and liquid pipelines
• Chemical storage and transfer systems

Operating Principle

The pneumatic actuator operates the butterfly disc through a 90-degree rotary motion. When the actuator rotates the disc to the fully open position, the flow passage is maximized and pressure loss is minimized. When the disc rotates to the fully closed position, the fluoropolymer-lined sealing system provides reliable shut-off of the process medium.

A double-acting pneumatic actuator uses compressed air for both opening and closing operations. A single-acting actuator uses compressed air in one direction and a spring-return mechanism in the opposite direction, allowing the valve to be configured for fail-open or fail-closed operation according to the process requirements.

Materials and Construction

The valve body can be manufactured from suitable metal materials such as ductile iron, carbon steel, stainless steel, or other alloys according to operating conditions. All wetted surfaces are protected by a high-quality fluoropolymer lining.

Depending on the application, lining materials such as PTFE, PFA, FEP, or other fluoropolymer materials can be selected according to the temperature, pressure, and chemical characteristics of the medium.

The butterfly disc, stem, seat, and other internal components are designed to provide reliable mechanical strength, corrosion resistance, and long-term sealing performance.

Advantages

The fully fluorine-lined construction provides an effective barrier against corrosive media while maintaining the mechanical strength of the valve body. Combined with pneumatic actuation, the valve offers rapid response, convenient automation, and dependable operation in demanding industrial environments.

Its compact design, low weight, low operating torque, excellent corrosion resistance, and reliable sealing performance make it an ideal choice for automated isolation and flow-control applications involving highly corrosive fluids.

Optional Configurations

The valve can be customized according to project requirements, including:

• Wafer, lug, or flanged connection
• PTFE, PFA, FEP, or other fluoropolymer lining
• Stainless steel, carbon steel, ductile iron, or special-alloy body
• Single-acting or double-acting pneumatic actuator
• Fail-open or fail-closed configuration
• Solenoid valve
• Valve position indicator
• Limit switch box
• Electro-pneumatic positioner
• Air filter regulator
• Manual override
• Customized pressure, temperature, size, and lining specifications

Typical Specifications

Valve Type: Pneumatic Fully Fluorine-Lined Butterfly Valve
Actuation: Pneumatic
Operation: Quarter-Turn
Actuator: Single-Acting or Double-Acting
Lining: PTFE / PFA / FEP / Fluoropolymer
Body Materials: Carbon Steel / Stainless Steel / Ductile Iron / Customized
Connection: Wafer / Lug / Flanged
Medium: Corrosive Liquids, Gases, Acids, Alkalis, Solvents, and Chemical Media
Control: On-Off or Modulating Control
Installation: Horizontal or Vertical Pipeline Installation
Applications: Chemical, Petrochemical, Pharmaceutical, Water Treatment, and Other Corrosive-Service Systems

Product Summary

The Pneumatic Fully Fluorine-Lined Butterfly Valve combines advanced fluoropolymer lining technology with reliable pneumatic actuation to provide excellent corrosion resistance, dependable sealing, and efficient automated flow isolation. It is particularly suitable for demanding industrial applications involving aggressive and corrosive process media where conventional metal valves may be subject to rapid corrosion or premature failure.