The D671F pneumatic fluorine-lined shut-off butterfly valve is an industrial automation execution unit specifically engineered for harsh and highly corrosive working conditions. This valve integrates a high-performance pneumatic piston actuator with a fully lined centerline butterfly valve body. The core technology involves an overall molded lining of F46 (FEP) or PTFE on the internal cavity and disc surfaces, completely isolating the medium from the metal substrate. By receiving air signals from control systems, the actuator drives the disc to rotate within a 0-90 degree range, achieving rapid shut-off or opening of aggressive media. With its superior chemical resistance, bubble-tight sealing, and compact design, the D671F series is widely utilized in petroleum, chemical, pharmaceutical, and electronic industries where corrosion protection is paramount.

Product Image of D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

Feature

1.Superior strong corrosion resistance:All media-contacting surfaces are lined with a uniform fluoroplastic layer, providing resistance against hydrochloric acid, sulfuric acid, aqua regia, and strong alkalis, ensuring long-term structural integrity.
2.Bi-directional bubble-tight sealing:Utilizing an interference-fit sealing principle, the disc edge fits tightly against the lined seat during closure. It offers excellent elastic compensation for zero-leakage in both directions, meeting ANSI Class VI standards.
3.Rapid response time:Equipped with high-thrust pneumatic piston actuators, utilizing compressed air to generate instantaneous torque for full-stroke action within 1-3 seconds. Ideal for emergency shutdown (ESD) applications.
4.Low flow resistance and high capacity:The disc features a streamlined, ultra-thin design. When fully open, the flow path is nearly straight with an extremely low resistance coefficient, reducing pressure drop and energy consumption.
5.Compact and lightweight design:Flanged or wafer designs significantly shorten the face-to-face length and weight. This saves space and reduces the mechanical load on the piping and its supports.
6.Vacuum and temperature stability:Advanced molding technology ensures the lining is firmly anchored to the metal, effectively preventing lining peeling or collapse under vacuum or pressure fluctuations.
7.Intrinsically safe attributes:Driven by clean compressed air, it eliminates spark risks, providing natural explosion-proof safety for hazardous oil, gas, and chemical zones.
8.Modular maintenance and durability:The refined design features minimal wearing parts. Actuator-to-body interfaces are standardized, allowing for online inspection of seals without removing the valve from the line.