Description
Fluorine Lined Plug Valves (also known as PTFE/PFA lined cock valves or chemical sleeve plug valves) are quarter-turn isolation valves engineered for instant, leak-tight shut-off in severe chemical processes. Featuring a cavity-free inner design and a seamless virgin fluoroplastic lining fully bonded to the body and plug, these valves eliminate media entrapment and provide total protection against strong acids, toxic fluids, and aggressive alkalis.
Designed for severe chemical duty, these lined plug valves perform reliably alongside our industrial butterfly valves and integrate directly into acid piping loops using precision-machined industrial flanges.
Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Nominal Diameter Range | DN15 to DN300 (1/2" to 12") |
| Nominal Pressure | PN10 / PN16 / Class 150 |
| Outer Body Material | Ductile Iron (QT450-10), WCB (Carbon Steel), Stainless Steel (CF8 / 304 SS) |
| Lining Material Options | PTFE (Polytetrafluoroethylene) / PFA (Perfluoroalkoxy) / FEP (F46) |
| Operation Type | Manual Lever Handle / Worm Gearbox / Pneumatic Actuator / Electric Actuator |
| Working Temperature | -20°C to 180°C (-4°F to 356°F) |
| Connection Standard | Flanged Ends (ASME B16.5 Class 150, HG/T 20592, EN 1092-1) |
| Testing & Quality Assurance | 100% Spark Test (15kV-25kV) & Shell/Seat Hydrostatic Pressure Test |
Key Features & Plug Sealing Mechanics
Safely controlling highly reactive or corrosive chemical lines requires robust sealing geometry and full lining coverage:
- Cavity-Free Design: Unlike standard ball valves, plug valves have no internal dead space where aggressive media can collect, crystallize, or degrade over time.
- Universal Corrosion Immunity: High-density PFA/PTFE lining fully covers internal fluid-wetted channels, providing total resistance against hydrofluoric acid, sulfuric acid, wet chlorine, and nitric acid.
- Self-Adjusting Primary & Secondary Seal: The tapered plug design offers 360-degree contact sealing. Top adjusting bolts allow precise mechanical torque tensioning to eliminate stem leakage.
Target Applications & Industries
Our fluorine-lined plug valves are deployed across hazardous chemical process units:
- Chlor-Alkali & Fine Chemical Plants: Acid neutralization, wet chlorine gas transfer, and hazardous solvent lines.
- Pharmaceutical Manufacturing: Highly pure acid dosing, crystallization tanks, and hazardous effluent isolation.
- Steel Pickling & Chemical Processing: Hydrofluoric/sulfuric waste acid recovery and toxic fluid piping.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a fluorine-lined plug valve over a lined ball valve?
The primary advantage is its cavity-free design. Plug valves prevent chemical buildup or media trapping inside body cavities, making them ideal for crystallizing fluids, slurries, or high-purity chemical processes.
Q2: How do you prevent lining detachment during thermal or vacuum cycles?
Our cast metallic bodies feature machined dovetail locking grooves. Fluoroplastics are injection-molded under pressure into these grooves, permanently anchoring the lining against vacuum collapse and thermal expansion.
Q3: Can Oucang Valve automate these plug valves with actuators?
Yes. As a direct factory, Oucang Valve builds standard ISO 5211 mounting pads for seamless integration with pneumatic or electric quarter-turn actuators.
About the Manufacturer: Oucang Valve
Oucang Valve is an ISO-certified direct manufacturer specializing in fluoroplastic-lined valves, chemical plug valves, and forged industrial pipe flanges. Operating our own casting foundry, PTFE/PFA injection molding workshop, and spark testing laboratory, we provide complete material traceability and custom OEM engineering for global projects.
- Core Capability: Precision PFA/PTFE lining injection, 15kV-25kV spark testing, custom plug valve production, and rapid direct export.
- Quality Compliance: ASME B16.5, HG/T 21562, EN, DIN, and ISO standards.
- Factory Inquiry: Contact our engineering sales team for direct factory quotations, chemical resistance charts, and 2D/3D CAD drawings.
