Product Overview
The PTFE-lined Butterfly Valve is designed for handling corrosive and chemically aggressive media in industrial pipeline systems.
The wetted parts are fully lined with PTFE (polytetrafluoroethylene), providing a chemically inert barrier between the process fluid and the valve body.
It is widely used in chemical processing, acid/alkali systems, pharmaceutical production, and corrosion-sensitive industrial pipelines.
Technical Specifications
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Size Range |
DN50 – DN800 |
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Pressure Rating |
PN1.0 – PN2.5 MPa |
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Temperature Range |
-20°C to 180°C |
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Body Materials |
Cast Iron / Ductile Iron / Carbon Steel (optional) |
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Lining Material |
PTFE (PTFE / enhanced PTFE options) |
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Seat / Sealing Surface |
PTFE + wear-resistant reinforced layer |
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Media |
Strong acids, alkalis, salts, corrosive industrial fluids |
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Connection Type |
Flanged (Standard: GB/T 12238, Option: ASME B16.5 Class 150 / EN 1092) | ||
All dimensions follow GB/T 12238 flange connection standards for direct installation without additional modification.
Core Advantages & Durability Engineering
Available from DN50 to DN800 to cover both plant utility lines and large-scale process piping.
Rated for PN1.0 to PN2.5 MPa pressures and -20°C to 180°C temperatures without liner deformation.
Built with GB/T 12238 flange connections for direct, modification-free on-site installation.
Features a composite wear-resistant layer over the PTFE seat to significantly extend operational lifecycle.
Primary Applications & Industries
Chemical Processing: Sulfuric acid, hydrochloric acid, nitric acid, chlor-alkali plants, and strong organic solvents.
Water Treatment: Industrial wastewater treatment, seawater desalination plants, and chemical dosing systems.
Pharmaceutical & Semiconductor: High-purity chemical distribution and ultra-pure water (UPW) systems requiring non-reactive surfaces.
Quality Assurance & Factory Verification
As a verified OEM/ODM manufacturer, our quality assurance protocol eliminates operational risks before shipment:
100% High-Voltage Spark Testing: Every lined component undergoes a non-destructive high-voltage spark inspection to guarantee zero micro-porosity, pinholes, or insulation defects in the polymer layer.
Dual-Stage Pressure Verification: Fully compliant with API 598. Every single unit undergoes a shell hydrostatic test and a zero-leakage pneumatic seat test before final packaging.
Traceability & Certification: Complete material test reports (MTR) matching EN 10204 3.1 and pressure test certifications are generated and archived for every batch.
FAQ
Q: Can your PTFE-lined butterfly valves replace standard valves in ANSI standard pipelines directly?
A: Yes. We offer standard face-to-face dimensions and flange drillings that perfectly match ASME B16.5 Class 150 and EN 1092 standards, allowing for direct, drop-in replacement without piping modification.
Q: How do you ensure the PTFE lining has no pinholes or thin spots?
A: We perform a 100% High-Voltage Spark Test (typically at 10kV-15kV) on the entire lined surface. Any micro-porosity will trigger an alarm, ensuring only flawless liners move to assembly.
Q: What certifications do you provide with the shipment?
A: Every shipment comes with a comprehensive Quality Documentation Package, including EN 10204 3.1 Material Test Reports (MTR), API 598 Pressure Test Certificates, and Spark Test Logs.
Q: Do you support OEM/ODM branding for global distributors?
A: Yes, as a verified manufacturer, we offer full OEM/ODM services, including custom nameplates, specific paint colors (RAL codes), and customized packaging for international distributors.
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