PFA-Lined Valves for Water and Wastewater Treatment

Corrosion-Resistant Flow Control for Chemical Dosing, Disinfection, and Desalination

Water treatment facilities rely on aggressive chemicals to ensure safe, clean water for communities and industries. Sodium hypochlorite, chlorine, sulfuric acid, and caustic soda destroy conventional valve materials—creating maintenance burdens, contamination risks, and costly failures in critical infrastructure.

GFT9 PFA-lined valves provide the chemical resistance essential for reliable operation in municipal water treatment, industrial wastewater processing, and desalination pretreatment systems. Our products serve disinfection systems, chemical dosing stations, and corrosive media handling throughout water treatment operations.

Manufactured in Germany to DIN EN standards with documented 25+ year service life expectations in sodium hypochlorite applications, GFT9 valves deliver the reliability that water infrastructure demands.

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Why Water Treatment Operations Require PFA-Lined Equipment

Water treatment combines multiple corrosive chemical challenges that exceed the capability of standard valve materials.

The Water Treatment Chemical Environment:

Sodium hypochlorite (NaOCl), the most common disinfectant, is highly corrosive to stainless steel, carbon steel, and many polymers. It releases chlorine gas as it degrades, attacking seals and causing catastrophic failures in conventional valves.

Chlorine gas (Cl₂) and chlorine dioxide (ClO₂) provide powerful disinfection but aggressively attack metals. Even high-alloy stainless steels experience stress corrosion cracking in chlorine environments.

pH adjustment chemicals—sulfuric acid for reduction, sodium hydroxide for elevation—require materials resistant to both acid and alkaline attack, often in the same facility.

Why PFA Excels in Water Treatment:

PFA (Perfluoroalkoxy Alkane) provides exceptional resistance to the full spectrum of water treatment chemicals:

Complete resistance to sodium hypochlorite at all concentrations—industry documentation indicates 25+ year service life in NaOCl systems.

Unaffected by chlorine gas, chlorine dioxide, and other halogen disinfectants.

Handles both sulfuric acid and sodium hydroxide for pH adjustment.

Resistant to hydrogen peroxide, ozone, and advanced oxidation chemicals.

Smooth, non-porous surface prevents biofilm formation and product contamination.

Alternative Material Consideration:

For chlorine-only service operating below 120°C, PVDF provides excellent performance at lower cost. Consult our engineering team for application-specific recommendations.

Applications Across Pharmaceutical Production

Water treatment facilities span multiple unit processes, each requiring corrosion-resistant flow control. GFT9 products serve critical functions throughout these operations.

Disinfection Systems

Chlorination and hypochlorination systems are the backbone of water treatment disinfection. PFA-lined valves handle sodium hypochlorite transfer from bulk storage, chlorine dioxide generation systems, chloramine formation for distribution system residual, and dechlorination chemical dosing. The inert PFA surface prevents the corrosion that leads to sodium hypochlorite leaks—eliminating safety hazards and environmental incidents.

Chemical Dosing Stations

Precise chemical dosing controls treatment effectiveness throughout the process. PFA-lined ball valves and control valves serve coagulant dosing (alum, ferric chloride), pH adjustment (sulfuric acid, caustic soda), fluoride addition systems, polymer and flocculant injection, and anti-scalant addition for membrane systems.

Desalination Pretreatment

Reverse osmosis desalination requires extensive pretreatment to protect membranes. PFA-lined valves handle chlorination for biofouling control, dechlorination (sodium bisulfite) before membrane contact, acid dosing for pH adjustment and scale control, and anti-scalant chemical systems. Chemical pretreatment sections experience the most aggressive chemical exposure in desalination plants.

Advanced Oxidation

Modern water treatment increasingly employs advanced oxidation processes. PFA-lined valves serve hydrogen peroxide dosing, ozone injection systems, and UV/peroxide combination treatment. PFA's resistance to powerful oxidizers makes it ideal for these emerging applications.

Sludge and Residuals Processing

Wastewater treatment generates corrosive sludge streams requiring chemical conditioning. PFA-lined valves handle polymer conditioning systems, lime stabilization, and dewatering chemical feed.

PFA-Lined Products for Water Treatment Applications

  • PFA Lined Control Valve NPS 1½ NPS 1½ - Valve with pneumatic multi-spring actuator for fast, cost-efficient operation. - High quality industrial valve by GFT9

    PFA-Lined Ball Valves – Spheron Series

    Full-bore ball valves with complete PFA lining for reliable isolation in aggressive chemical service. The Spheron series features heavy-duty bodies with thick injection-molded PFA linings and multiple actuation options for automated plant control.

    Standard Series (Cast Carbon Steel Body 1.0619):
    Sizes: DN15 to DN200
    Pressure Rating: PN10/16
    Temperature Range: -20°C to +180°C
    Body: Cast Carbon Steel 1.0619 with epoxy exterior coating
    Operation: Manual lever, gear operator, pneumatic or electric actuator

    For Sodium Hypochlorite Service:
    PFA-lined valves eliminate the corrosion-related failures common with stainless steel and PVC alternatives. The smooth PFA surface resists chlorine attack and prevents the outgassing-related damage that affects conventional valve balls.

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  • PFA Lined Ball Check Valve NPS 8 NPS 8 - On vertical mounting up to 60°, the center-guided ball closes the valve automatically. - High quality industrial valve by GFT9

    PFA-Lined Ball Check Valves – Prohibron Series

    Fully lined ball check valves prevent backflow and protect pumps from reverse flow damage in corrosive service.

    Sizes: DN25 to DN150
    Pressure Rating: PN10/16
    Temperature Range: -20°C to +180°C
    Body: Cast Carbon Steel 1.0619
    Alternative Design: Swing Check Valve Wafer style for compact installation

    Applications include chemical metering pump discharge protection, gravity flow control in dosing systems, and isolation of chemical storage tanks.

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  • PFA Lined Sight Glass NPS_10 NPS_10 - Sight glass mounts vertically or horizontally for easy installation in any environment. - High quality industrial valve by GFT9

    PFA-Lined Strainers – Filtron Series

    T-pattern strainers with full PFA lining protect pumps, instruments, and downstream equipment from particulates while maintaining complete corrosion resistance.

    Sizes: DN25 to DN150
    Pressure Rating: PN16
    Temperature Range: -20°C to +180°C
    Body: Cast Carbon Steel 1.0619
    Screen Materials: PTFE mesh

    Essential for protecting chemical metering pumps, analyzers, and control valves in dosing systems.

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  • PFA Lined Strainer NPS 6 (on request) NPS 6 (on request) - Main view - High quality industrial valve by GFT9

    PFA-Lined Control Valve – Imperium Series

    Control of chemical flow and solution condition.

    Sizes: DN25 to DN100
    Pressure Rating: PN10/16
    Body: Cast Carbon Steel 1.0619 or Stainless Steel 1.4408
    Operation: Manual, gear operator, pneumatic or electric actuator

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Technical Specifications for Hydrogen Applications

Technical Specifications

Size Range (DN) DN 15 – DN 200
Size Range (NPS) ½" – 8"
Pressure Rating (DIN) PN 16
Pressure Rating (ANSI) Class 150
Temperature Range -20°C to +180°C (-4°F to +356°F)
Extended range to -60 and +200°C on request
Body Material (Standard) 1.0619 , 1.4308, 1.4408/ A216WCB, CF8-M or CF-8
Body Material (Clean Room) -
Lining Material Virgin PFA (Perfluoroalkoxy)
Lining Thickness 2.5 – 4.0 mm depending on size
Face-to-Face Standard EN 558-1
Flange Standard (DIN) EN 1092-1
Flange Standard (ANSI) ASME B16.5
Certifications PED 2014/68/EU Module A2, ISO 9001:2015, EN 12266-1, TU-LUFT, SIL
Custom Engineering Available:
Special sizes, extended temperature ratings, and custom actuation available on request.

Chemical Compatibility

Chemical Compatibility

Chemical Formula Concentration Max Temp Rating

Sodium Hypochlorite

 NaOCl All concentrations to 15% 60°C

Chlorine Dioxide

 ClO₂ Process concentrations to 12 g/L 80°C

Sulfuric Acid

 H₂SO₄ All concentrations to 98% 120°C

Sodium Hydroxide

 NaOH All concentrations to 50% 120°C

Hydrogen Peroxide

 H₂O₂ All concentrations to 50% 60°C

Ferric Chloride

 FeCl₃ All concentrations to 45% 80°C

PFA provides excellent service life in sodium hypochlorite applications—industry documentation indicates 25+ year service with proper installation. For chlorine gas service, consult our engineering team for specific application guidance.

Excellent Full resistance, suitable for continuous use Good Suitable for most applications Limited Verify for specific conditions

Quality Assurance and Compliance

Water treatment facilities require equipment that meets regulatory standards and provides documented reliability. GFT9 provides comprehensive quality assurance.

Manufacturing Standards:

Production to DIN EN standards
Pressure testing per EN 12266-1
Material traceability from raw material to finished product
ISO quality management systems

Documentation Packages:

EN 10204 Type 3.1 material certificates
PFA material certificates with batch identification
Pressure test certificates
Dimensional inspection reports
Declarations of conformity (CE marking)

Material Specifications:

Body materials: 1.0619 (cast carbon steel), 1.4408 (stainless steel)
Lining: Virgin PFA, minimum 2.5mm wall thickness
Temperature range: -20°C to +180°C (1.0619) / -60°C to +180°C (1.4408)
Flange standards: DIN EN 1092-2, ANSI B16.5 available

Contact our technical team for water treatment application documentation requirements.

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German Engineering for Critical Applications

  • Manufacturing Excellence:

    All GFT9 products are manufactured in Germany under strict quality control. Our facility in Kempen combines traditional valve manufacturing expertise with modern PFA lining technology, ensuring consistent quality across every component.

  • Documentation and Traceability:

    Hydrogen projects demand comprehensive documentation for safety compliance and operational records. GFT9 provides complete documentation packages including material certificates (EN 10204 3.1), test reports, declarations of conformity, and—for control valve projects—digital valve passports with QR code access to lifetime records.

  • Technical Support:

    Our engineering team understands the specific requirements of hydrogen applications. From initial specification review through commissioning support, we work alongside project teams to ensure our products meet exact application needs.

  • Flexible Delivery

    With standard products available from stock and custom solutions delivered within project timelines, GFT9 supports both urgent replacements and planned capital projects.
About GFT9

Discuss Your Water Treatment Requirements

Whether you're upgrading chemical dosing systems, specifying valves for a new treatment plant, or sourcing maintenance spares, our technical team supports your project.

We work with municipal water and wastewater utilities, desalination plant operators, engineering consultants and EPC contractors, chemical system integrators, and industrial water treatment facilities.

Contact Options:

Email: sales@gft9.shop
Phone: +49 2152 9154990

We provide chemical compatibility verification and application-specific recommendations.

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