Description
Fluorine Lined Ball Valves (also known as PTFE/PFA lined chemical ball valves or corrosion-resistant ball valves) are quarter-turn full-bore isolation valves designed for reliable, zero-leakage control of highly aggressive acids, alkalis, and toxic chemicals. Featuring a seamless virgin fluoroplastic lining fully encapsulated over the cast body and ball, these valves completely isolate internal metallic parts from corrosive media, ensuring exceptional service life in demanding chemical processes.
Engineered for low torque operation and full-flow passage, these lined ball valves perform seamlessly alongside our industrial butterfly valves and connect directly into acid 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 Body Material | Ductile Iron (QT450-10), WCB (Carbon Steel), Stainless Steel (CF8 / 304 SS) |
| Lining Material Options | PTFE (Polytetrafluoroethylene) / PFA (Perfluoroalkoxy) / FEP (F46) |
| Structure & Operation | Two-Piece / Three-Piece Body; Manual Lever, Worm Gear, Pneumatic, 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 & Chemical Isolation Mechanics
Safely handling aggressive reagents requires zero-leakage sealing architecture and robust lining bonding:
- Superior Corrosion Resistance: High-density PFA/PTFE lining covers all internal flow passages, ball surfaces, and stem wetted areas, resisting hydrochloric acid, sulfuric acid, nitric acid, and organic solvents.
- Full-Port Flow & Low Pressure Loss: The straight-through full-bore ball design maximizes flow capacity and prevents solids accumulation while keeping system head loss to a minimum.
- Anti-Blowout Stem & Vacuum Security: Dovetail anchoring grooves cast into the body lock the lining tightly, preventing liner collapse under full vacuum or elevated temperature cycles.
Target Applications & Industries
Our fluorine-lined ball valves are installed across severe chemical isolation loops:
- Chlor-Alkali & Fine Chemical Manufacturing: Hydrochloric acid dosing, wet chlorine lines, and reactor isolation.
- Pharmaceutical & Specialty Chemicals: Corrosive solvent transfer, acid distillation loops, and pure chemical handling.
- Steel Pickling & Environmental Engineering: Spent acid recycling, hazardous effluent processing, and electroplating loops.
Frequently Asked Questions (FAQ)
Q1: What is the difference between PTFE, PFA, and FEP linings for ball valves?
PTFE provides excellent universal chemical resistance; PFA is melt-processable, offering superior surface smoothness, optical purity, and high vacuum resistance; FEP (F46) offers cost-effective performance for lower temperature chemical duties up to 150°C.
Q2: How do you verify that there are no pinholes in the lining?
Every fluorine-lined ball valve undergoes a mandatory 15kV–25kV high-voltage spark test prior to assembly to ensure zero pinholes or micro-fractures in the fluoroplastic layer.
Q3: Can Oucang Valve supply pneumatic or electric actuated lined ball valves?
Yes. As a direct factory, Oucang Valve manufactures standard ISO 5211 top flanges for easy mounting of double-acting/spring-return pneumatic or electric actuators.
About the Manufacturer: Oucang Valve
Oucang Valve is an ISO-certified direct manufacturer specializing in fluoroplastic-lined valves, chemical ball valves, and forged industrial pipe flanges. Operating our own casting foundry, PTFE/PFA injection molding workshop, and high-voltage spark testing laboratory, we deliver full material traceability and custom OEM engineering for global process projects.
- Core Capability: Precision PFA/PTFE lining injection, 15kV-25kV spark testing, custom ball 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.
