Overview
Anhui Xinfulong‘s PFA/PTFE lined shut-off valves are engineered to provide reliable, bubble-tight isolation in the most demanding corrosive and high-purity fluid handling environments. Manufactured with fully fluoropolymer-lined wetted parts — available in PFA, FEP, or PTFE — our valves ensure zero metal contact with process media, eliminating the risk of contamination and corrosion that plagues conventional metallic valves in aggressive chemical service.
The valve body and all internal flow-contacting surfaces are precision-lined with high-purity fluoropolymer, creating an inert barrier that withstands virtually all chemicals — including concentrated acids, alkalis, solvents, and aggressive etchants-. Whether deployed in semiconductor wet benches, wet chemical distribution systems, pharmaceutical reactors, or chemical processing plants, our shut-off valves deliver dependable performance, long service life, and the purity assurance that critical applications demand.
Key Features
Superior Corrosion Resistance
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Fully lined wetted parts with PFA, FEP, or PTFE — inert to virtually all chemicals, including sulfuric acid, hydrochloric acid, hydrofluoric acid, nitric acid, aqua regia, caustics, and organic solvents
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Fluoropolymer lining completely isolates the metal valve body from process media, eliminating corrosion and extending valve service life
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Available in multiple lining materials to match specific process requirements and temperature ranges
Bubble-Tight Shut-Off
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Engineered for bidirectional, zero-leakage (bubble-tight) shutoff, meeting the most stringent leakage standards
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Soft-seal design achieves gas-tight closure — ideal for hazardous, toxic, or ultra-pure media where even leakage is unacceptabl
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Precision-molded sealing surfaces ensure consistent, reliable closure over thousands of cycles
Ultra-High Purity
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Zero metal contact with process fluid — all wetted surfaces are fully fluoropolymer lined-
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Smooth, non-stick, non-porous surface prevents particle entrapment, microbial growth, and contamination
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Meets semiconductor-grade cleanliness standards-
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FDA-compliant grades available for pharmaceutical and food-contact applications
Versatile Configurations
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Available in multiple valve types: globe valves (straight-through, angle, and Y-pattern), diaphragm valves, and plug valves
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Manual, pneumatic, or electric actuation options to suit automation and remote control requirements
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Flanged end connections — compatible with DIN, ANSI, JIS, and other international flange standards
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Wide size range: DN15 to DN350 (1/2″ to 14″) and above
Reliable Sealing & Long Service Life
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High-quality fluoropolymer linings with thickness of 3–3.5 mm for exceptional permeation resistance
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Top-entry or in-line maintenance designs allow for easy inspection and service without removing the valve from the pipeline
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PTFE/fluoropolymer stem seals and packing provide fugitive emission control
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Corrosion-resistant actuator mounting and hardware options for harsh environments
Broad Operating Range
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Temperature range: -85°C to +180°C (depending on lining material and configuration)
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Pressure ratings: PN1.0MPa to PN6.4MPa (Class 150 to Class 300 equivalents)
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Suitable for liquid, gas, and steam media — with or without suspended solids
Technical Specifications
Applications
Our PFA/PTFE lined shut-off valves are widely deployed across industries requiring reliable isolation in corrosive or high-purity service:
Semiconductor Manufacturing
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Wet benches and wet process tools — chemical isolation and distribution-
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High-purity chemical delivery lines for etching, cleaning, and photoresist processing
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Ultra-pure water (UPW) systems
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CMP slurry delivery systems
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Chemical mechanical planarization (CMP) and wafer fabrication
Wet Electronic Chemicals
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Transfer and distribution of high-purity acids, solvents, and etchants
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Chemical blending and recirculation systems
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High-purity reagent feed lines
Pharmaceutical & Biotech
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High-purity fluid transfer with zero contamination risk
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Solvent and reagent delivery systems
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FDA-compliant processing lines
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CIP/SIP systems requiring corrosion-resistant isolation
Chemical Processing
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Corrosive chemical handling in pickling, plating, and etching processes-
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Acid recovery and waste treatment systems
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Transfer of strong acids, alkalis, and organic solvents
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Chlor-alkali and ion exchange resin systems
New Energy
Why Choose Xinfulong Lined Shut-Off Valves?
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Complete Corrosion Protection — Fully fluoropolymer-lined wetted parts ensure zero metal contact and eliminate corrosion-related failures
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Absolute Purity Assurance — Smooth, non-porous lining surfaces prevent contamination — meeting semiconductor-grade cleanliness standards
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Bubble-Tight Reliability — Engineered for zero-leakage shutoff, ensuring safety and process integrity in critical applications
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Cleanroom Manufacturing — Critical production processes carried out in Class 1000/10,000 cleanrooms, ensuring the highest levels of purity
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Industry-Leading Expertise — Backed by decades of fluoropolymer processing experience and R&D collaboration with Japanese and Korean experts
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Proven Global Track Record — Trusted by clients across Europe, Japan, Korea, Taiwan (China), and beyond
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Comprehensive Quality Assurance — ISO 9001, ISO 14001, ISO 45001 certified with full in-house testing capabilities including pressure testing, leakage testing, and dimensional inspection
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End-to-End Service — From custom design and material selection to manufacturing, testing, and after-sales support
Customization Options
We offer fully customizable lined shut-off valves to meet your specific process requirements:
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Valve type selection (globe, diaphragm, plug) and configuration
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Lining material selection (PFA, FEP, PTFE) based on temperature and media compatibility
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Body material options (ductile iron, cast steel, stainless steel)
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Actuation type (manual, pneumatic, electric) and accessories (positioners, limit switches, solenoid valves)
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End connection standards (DIN, ANSI, JIS)
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Special size and pressure ratings
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Anti-static or high-permeation-resistant lining grades available
