PTFE Lined Control Valve, Bellows Seal, 3/4-8 IN, 150-300 LB

Count on our premium PTFE lined control valve, expertly constructed with a single-seat trim and integrated bellows seal to deliver zero external leakage, ultra-stable throttling performance and long service life for harsh chemical process pipelines. The built-in bellows sealing structure completely isolates process media from the valve stem, effectively eliminating fugitive emissions of toxic, volatile or corrosive fluids while preventing atmospheric contamination and stem corrosion—an essential design upgrade for environmentally sensitive and high-purity industrial working conditions. Adopting a precision single-seated internal trim, this valve achieves tight shut-off capability, delivers accurate flow modulation and minimizes flow deviation under variable pressure differential, supporting stable fine regulation of fluid flow rate, pressure and temperature.
This complete valve series covers a full dimensional range from 3/4 inch up to 8 inches, with standardized pressure ratings complying with ANSI Class 150 through Class 300 LB, perfectly matching low and medium-pressure industrial piping systems across multiple sectors. To accommodate diverse corrosive media and operating temperature requirements, multiple high-grade casting body materials are provided for flexible selection: ASTM A216 WCB carbon steel for general non-corrosive process applications with outstanding mechanical strength and cost efficiency; ASTM A351 CF3, CF3M, CF8 and CF8M stainless steel castings that feature exceptional tensile strength, oxidation resistance and resistance to acidic, alkaline and saline media, catering to chemical, pharmaceutical and wastewater processing scenarios.
The full internal PTFE lining serves as a robust protective barrier between the valve metal body and process fluids. Boasting outstanding universal chemical inertness, PTFE withstands nearly all strong acids, strong alkalis, organic solvents and corrosive chemical mixtures without degradation, swelling or chemical reaction. The smooth lining surface drastically reduces fluid friction loss, prevents medium adhesion and sediment buildup inside the valve cavity, and greatly lowers the frequency of routine maintenance and cleaning.
Engineered specifically for demanding industrial environments including fine chemical manufacturing, pesticide processing, pharmaceutical production, electroplating waste treatment and acid-base liquid transportation, this PTFE lined bellows seal control valve balances reliable corrosion protection, precise flow control and emission-free operation. Its standardized dimensional specifications and interchangeable internal trim simplify on-site installation, spare parts replacement and system integration, making it a dependable long-term fluid regulation solution for corrosive media process lines.
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