Overview
Anhui Xinfulong's Manual Diaphragm Valves are precision-engineered for ultra-high purity (UHP) and aggressive fluid handling applications in semiconductor, wet chemical, pharmaceutical, and analytical laboratory environments. Constructed from high-purity PFA (Perfluoroalkoxy) and PTFE (Polytetrafluoroethylene) materials, our valves deliver exceptional chemical resistance, superior leak integrity, and reliable on/off flow control in the most demanding process conditions.
The diaphragm valve design features a molded fluoropolymer body with precision-machined sealing areas, incorporating a flexible diaphragm that isolates the process media from the valve's mechanical operating components-. This weir-type design ensures zero dead volume, minimizes particle entrapment, and provides bubble-tight shut-off — making it the preferred choice for high-purity chemical distribution, wet etching, wafer cleaning, and ultra-pure water systems-.
Available in 2-way and 3-way configurations, with a variety of port sizes and connection types, our manual diaphragm valves offer the flexibility to meet the specific requirements of your fluid handling system.
Key Features
Superior Chemical Resistance
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All wetted parts constructed from high-purity PFA and modified PTFE, providing exceptional resistance to virtually all chemicals, including concentrated acids, bases, solvents, and aggressive etchants
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Non-wetted components feature PVDF housings, Viton® seals, and PTFE-coated stainless steel springs for extended service life in corrosive environments
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Compatible with a wide range of process media, including high-concentration acids, bases, clear chemistries, and slurries
Excellent Leak Integrity
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Precision-machined sealing areas and tongue-and-groove seal design ensure positive diaphragm-to-body sealing
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Provides bubble-tight shut-off with minimal particle entrapment
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Eliminates fugitive emissions and prevents cross-contamination in critical processes
Ultra-High Purity Design
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All-wetted PFA/PTFE flow path eliminates metal ion contamination
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Smooth, non-porous surfaces prevent particle entrapment and microbial growth
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Meets the stringent cleanliness requirements of semiconductor fabrication and pharmaceutical processing
Long Cycle Life & Reliability
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One-piece modified PTFE diaphragm provides excellent flexibility and significantly higher cycle life compared to conventional PTFE
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Fluoropolymer-coated stainless steel spring reduces the effects of corrosive environments
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Exacting design controls seat and diaphragm stresses for reliable, maintenance-free service
Flexible Configuration Options
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Available in 2-way and 3-way configurations
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Multiple port sizes: 1/4", 1/2", 3/4", and 1"
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Variety of connection types: threaded (NPT), flanged, and tube fitting connections
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Multi-turn or quarter-turn operation options for precise flow adjustment
Bidirectional Pressure Capability
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Pressure rated in both forward and reverse directions
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Full vacuum to positive pressure capability
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Suitable for applications requiring flow in either direction
Technical Specifications
Applications
Our Manual Diaphragm Valves are widely deployed in high-purity and aggressive fluid handling applications:
Semiconductor Manufacturing
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High-purity chemical delivery for wet etching, wafer cleaning, and photoresist processing
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Ultra-pure water (UPW) distribution systems
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CMP (Chemical Mechanical Planarization) slurry delivery
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Valve manifold boxes (VMBs) and tool hook-ups
Wet Electronic Chemicals
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Transfer and distribution of high-purity acids, solvents, and etchants
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Chemical blending and batching 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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Clean-in-place (CIP) and steam-in-place (SIP) compatible designs
Analytical Laboratories
Industrial Chemical Processing
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Corrosive chemical handling in pickling, plating, and etching processes
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Chemical feed and recirculation lines
Available Configurations
Why Choose Xinfulong Manual Diaphragm Valves?
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Superior Leak Integrity — Precision-machined sealing areas and tongue-and-groove seal design ensure positive, bubble-tight shut-off
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Ultra-High Purity — All-wetted PFA/PTFE flow path eliminates metal ion contamination and minimizes particle entrapment-
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Long Service Life — One-piece modified PTFE diaphragm and fluoropolymer-coated springs provide high cycle life and exceptional corrosion resistance
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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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Comprehensive Quality Assurance — ISO 9001, ISO 14001, ISO 45001 certified with full in-house testing capabilities
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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 manual diaphragm valves to meet your specific requirements:
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Custom port sizes and connection types (NPT threaded, flanged, tube fittings)
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2-way or 3-way configurations
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Multi-turn or quarter-turn operation
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Special diaphragm materials for specific chemical compatibility
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Custom body and seal materials
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Integration with complete piping systems including fittings, valves, and accessories
