Description
Fluorine Lined Globe Valves (also known as PTFE/PFA lined chemical globe valves or acid-resistant shut-off valves) are heavy-duty control and isolation valves engineered for precise flow throttling and leak-free shut-off in hazardous chemical pipelines. Built with a seamless virgin fluoroplastic lining fully encapsulated over the cast body, stem, and plug disc, these globe valves prevent harsh acids, alkalis, and solvents from contacting internal metallic components.
Designed for severe throttling and high-seal safety, these lined globe valves work seamlessly alongside our industrial butterfly valves and connect directly into fluoroplastic piping loops using precision-forged 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 Shell Material | Ductile Iron (QT450-10), WCB (Carbon Steel), Stainless Steel (CF8 / 304 SS) |
| Lining Material Options | PTFE (Polytetrafluoroethylene) / PFA (Perfluoroalkoxy) / FEP (F46) |
| Stem & Disc Type | OS&Y Rising Stem / Fully Lined Parabolic Disc |
| 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) & Hydrostatic Shell/Seat Pressure Test |
Key Features & Chemical Throttling Mechanics
Safely regulating toxic or aggressive fluids requires strict stem packing integrity and complete internal lining protection:
- Universal Chemical Resistance: Seamless PFA/PTFE lining covers all internal wetted areas, resisting all concentrations of hydrofluoric acid, hydrochloric acid, sulfuric acid, and strong oxidizing agents.
- Accurate Flow Control: The linear movement of the contoured plug disc enables precise flow regulation and dependable shut-off superior to standard gate or ball valves in throttling applications.
- Multi-Stage Stem Packing & Bellows Option: Features spring-loaded PTFE chevron V-ring packing combined with back-seating capability to permanently eliminate fugitive stem emissions.
Target Applications & Industries
Our fluorine-lined globe valves are widely specified across chemical processing and acid handling systems:
- Chlor-Alkali & Fine Chemicals: Hydrochloric acid dosing, wet chlorine regulation, and chemical reactor feeding.
- Pharmaceutical & Specialty Processing: Corrosive solvent metering, acid distillation, and high-purity fluid isolation.
- Steel Pickling & Chemical Recovery: Spent acid recycling, pickling line regulation, and hazardous wastewater handling.
Frequently Asked Questions (FAQ)
Q1: Why choose a fluorine-lined globe valve over a lined ball valve for chemical dosing?
Globe valves offer proportional, fine-tuned flow control and lower risk of cavitation erosion on the seat during continuous throttling, making them better suited for precise chemical dosing than quarter-turn ball valves.
Q2: How do you verify lining integrity before delivery?
Every fluorine-lined globe valve undergoes a 15kV–25kV high-voltage spark test to detect any micro-pinholes, followed by strict seat hydrostatic pressure testing.
Q3: Can Oucang Valve fit pneumatic or electric control actuators to these globe valves?
Yes. As a direct factory, Oucang Valve provides ISO mounting bonnets to easily fit pneumatic diaphragm actuators or electric linear control actuators.
About the Manufacturer: Oucang Valve
Oucang Valve is an ISO-certified direct manufacturer specializing in fluoroplastic-lined valves, chemical globe valves, and forged industrial pipe flanges. Operating our own casting foundry, PTFE/PFA molding workshop, and pressure testing laboratory, we supply full material certification and custom OEM engineering for global process projects.
- Core Capability: Precision PFA/PTFE lining injection, high-voltage spark testing, custom globe valve fabrication, 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.
