Overview
Anhui Xinfulong's FEP Lined Ball Valves are engineered for reliable flow control in the most demanding corrosive and high-purity applications. FEP (Fluorinated Ethylene Propylene) — a melt-processable fluoropolymer — offers exceptional chemical resistance, excellent non-stick properties, and superior permeation resistance, making it an ideal lining material for valves handling aggressive chemicals, acids, alkalis, and high-purity media.
Our FEP lined ball valves feature a full fluoropolymer lining that completely isolates the metal valve body from the process medium-. The lining is applied through high-pressure injection molding technology, ensuring a dense, void-free, and uniformly adhered layer that provides unsurpassed resistance to corrosion, permeation, and contamination. Available in manual lever, gear-operated, pneumatic, or electric actuation configurations, our valves deliver bubble-tight shut-off and long-term reliability in semiconductor, wet chemical, pharmaceutical, and chemical processing environments.
FEP exhibits chemical stability comparable to PTFE, with the added advantage of being melt-processable for superior lining adhesion and uniformity-. It can be applied to any strong corrosive medium except molten alkali metals and elemental fluorine.
Key Features
Superior Corrosion Resistance
-
Full FEP lining on all wetted parts — inner cavity, ball, and stem — completely isolates the metal body from the process medium
-
Chemically resistant to virtually all acids, alkalis, solvents, and aggressive chemicals, except molten alkali metals and elemental fluorine
-
Lining thickness of 3 to 5 mm provides robust protection against permeation and chemical attack
-
Excellent resistance to environmental stress cracking
Full Bore / Full Port Design
-
Full-port straight-through flow path minimizes pressure drop and fluid resistance
-
Prevents crystallization, scaling, and medium retention common in chemical processing
-
Maximum flow capacity — ideal for high-flow, viscous media, and slurry applications
-
Enables pipeline pigging and easy maintenance
Bubble-Tight Sealing & Zero Leakage
-
Unique seat design with precision-molded sealing surfaces ensures bubble-tight shut-off across the full pressure range
-
Special molding process creates dense sealing surfaces with excellent surface finish
-
Herringbone ring PTFE packing combination achieves zero leakage performance
-
Reduced friction coefficient between ball and seal minimizes operating torque
Blow-Out Proof Stem
-
Ball and stem are integrally cast or forged as a single unit
-
Eliminates the possibility of stem ejection due to pressure fluctuations
-
Fundamentally ensures safety in engineering applications
Compact & Optimized Design
-
Compact, rational structure with minimized internal cavity space
-
Reduces medium and contamination risk
-
Two-piece and three-piece configurations available to suit various piping systems and operating conditions
-
Three-piece design allows the main valve body to be separated from end connectors for online quick replacement and maintenance
Multiple Actuation Options
-
Manual lever operation — simple and reliable for on/off control
-
Gear operator — reduces torque for larger sizes
-
Pneumatic actuator — double-acting or spring-return for automated control
-
Electric actuator — for precise modulating or remote on/off control
-
All configurations comply with ISO 5211 mounting standards
Anti-Static Design (Optional)
-
Anti-static device discharges potential static charge accumulation on the ball caused by friction
-
Prevents sparks in flammable solvent and hydrocarbon pipelines
-
Spring between ball, stem, and valve body provides a continuous conductive path to ground
Technical Specifications
Applications
Our FEP Lined Ball Valves are widely deployed across industries requiring corrosion-resistant, high-purity, and reliable flow control:
Semiconductor Manufacturing
-
High-purity chemical distribution systems
-
Wet etching and wafer cleaning processes
-
Ultra-pure water (UPW) systems
-
CMP slurry delivery
Wet Electronic Chemicals
-
Transfer and control of high-purity acids, solvents, and etchants
-
Chemical blending and distribution systems
-
High-purity reagent feed lines
Chemical & Petrochemical Processing
-
Handling of strong acids (sulfuric, hydrochloric, nitric, hydrofluoric)
-
Caustic soda and alkaline solutions
-
Organic solvents and aggressive media
-
Pickling and plating lines
Pharmaceutical & Biotech
-
High-purity fluid transfer with zero contamination risk-
-
Solvent and reagent delivery systems
-
FDA-compliant processing lines
New Energy
Water & Wastewater Treatment
Pulp & Paper, Mining
Why Choose Xinfulong FEP Lined Ball Valves?
-
Superior Corrosion Protection — Full FEP lining on all wetted parts provides chemical resistance superior to expensive alloys and far outlasts standard stainless steel valves in corrosive lines-
-
Zero Leakage Performance — Bubble-tight sealing with precision-molded sealing surfaces ensures zero leakage — critical for environmental safety, product purity, and process integrity-
-
High-Purity Manufacturing — Critical production processes carried out in Class 1000/10,000 cleanrooms, ensuring the highest levels of purity and contamination control
-
Industry-Leading Expertise — Backed by decades of fluoropolymer processing experience and R&D collaboration with Japanese and Korean experts
-
Proven Global Track Record — Trusted by clients across Europe, Japan, Korea, Taiwan (China), and beyond
-
Comprehensive Quality Assurance — ISO 9001, ISO 14001, ISO 45001 certified with full in-house testing capabilities including hydro testing, pneumatic testing, and spark testing
-
End-to-End Service — From custom design and material selection to manufacturing, testing, and after-sales support
-
Flexible Configurations — Two-piece and three-piece designs available to suit various piping systems and maintenance requirements
Customization Options
We offer fully customizable FEP lined ball valves to meet your specific requirements:
-
Valve sizes from DN15 to DN400
-
Body materials: cast iron, ductile iron, WCB, CF8, CF8M
-
Connection types: flanged (ANSI, DIN, JIS, GB), wafer, threaded
-
Actuation options: manual lever, gear, pneumatic (double-acting or spring-return), electric
-
Two-piece or three-piece body design
-
Anti-static design for flammable service
-
Special trim materials and configurations
