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Duplex Stainless Steel Marine Butterfly Valve for Desulfurization Tower, PTFE Seal, DN50-DN800
Product Spotlights
Engineered for harsh marine desulfurization (scrubber) systems, this valve combines duplex stainless steel for superior strength and chloride corrosion resistance with a PTFE seat for reliable, bubble-tight sealing against aggressive chemicals. Available in DN50-DN800 sizes with multiple actuation options, it ensures long service life, low maintenance, and compliance in critical environmental control applications.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Marine Desulfurization Tower (Scrubber) Systems
Material:
Duplex Stainless Steel (e.g., UNS S31803/S32205)
Seal Material:
PTFE (Polytetrafluoroethylene)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine Desulfurization Tower (Scrubber) Systems
Material
Duplex Stainless Steel (e.g., UNS S31803/S32205)
Seal Material
PTFE (Polytetrafluoroethylene)
Size Range
DN50 to DN800
Connection Type
Wafer or Lug (Typical)
Operation Type
Manual Lever, Gear, Electric, or Pneumatic Actuator
Pressure Rating
PN10, PN16, ANSI 150, or Custom
Temperature Range
-20°C to 200°C (with PTFE seal)
Design Standard
API 609, ISO 5752, or Equivalent
Face-to-Face
Per ISO 5752 Series 20 (or as per standard)
As a dedicated manufacturer with a strong focus on industrial fluid control, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our specialized Duplex Stainless Steel Marine Butterfly Valve, engineered specifically for the demanding environments of desulfurization towers (scrubbers) in marine and offshore applications. Since our establishment in 2016, we have committed to delivering robust and reliable valve solutions. This valve is a testament to our expertise, combining the superior corrosion resistance of duplex stainless steel with the exceptional sealing performance of PTFE to ensure long-term, maintenance-free operation in flue gas desulfurization (FGD) systems. It is designed to handle aggressive media, including seawater, alkaline slurries, and acidic by-products, making it a critical component for meeting stringent environmental regulations.
Our valve is meticulously crafted to provide optimal performance and durability in one of the most challenging industrial applications. Below are the key features and specifications that set this product apart:
- Superior Material Construction: The valve body and disc are manufactured from duplex stainless steel (grades such as UNS S31803/S32205). This material offers an excellent combination of high strength and outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-containing environments like marine scrubbers.
- Advanced PTFE Seal System: The seat is lined with high-grade PTFE, known for its chemical inertness, wide temperature tolerance, and low friction coefficient. This ensures a bubble-tight seal, reduces operational torque, and provides reliable shut-off against various aggressive chemicals present in desulfurization processes.
- Robust Design for Marine Duty: The valve design incorporates features to withstand vibration, thermal cycling, and the corrosive marine atmosphere. The stem is designed for high integrity, often with a blowout-proof feature, ensuring safety and reliability.
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Flexible Actuation Options: To suit different control requirements, the valve can be configured with various actuation methods. It is compatible with:
- Manual lever or gear operator for simple on/off service.
- Pneumatic or electric actuators for automated process control and remote operation.
- Broad Size and Pressure Compatibility: Available in a comprehensive size range from DN50 (2") to DN800 (32"), this valve can accommodate various pipeline dimensions within a scrubber system. It is typically rated for standard pressure classes like PN10/16 or ANSI 150, with options for higher ratings available.
Here is a summary of typical technical specifications:
| Parameter | Specification / Description |
|---|---|
| Primary Material | Duplex Stainless Steel (UNS S31803/S32205 or equivalent) |
| Seat / Seal Material | PTFE (Polytetrafluoroethylene) Lining |
| Nominal Diameter (DN) | 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800 |
| Pressure Rating | PN10, PN16, ANSI 150 (Custom ratings available) |
| Temperature Range | -20°C to +200°C (Depending on seal material) |
| Connection Standard | ISO, DIN, ANSI Flanges (Wafer or Lug type) |
| Operation | Manual (Lever/Gear), Pneumatic Actuator, Electric Actuator |
| Leakage Class | Zero Leakage (Bubble-tight) with PTFE seat |
Benefits for Your Operation:
- Extended Service Life: The duplex steel and PTFE combination drastically reduces corrosion and wear, leading to lower replacement frequency and reduced lifecycle costs.
- Enhanced System Reliability: Reliable sealing minimizes process fluid leakage, ensuring consistent scrubber efficiency and compliance with emission standards.
- Low Maintenance: The robust design and corrosion-resistant materials result in minimal need for maintenance or adjustment, reducing downtime and operational expenses.
- Operational Flexibility: The availability of multiple actuation options allows for easy integration into both new and existing automated control systems.
Backed by our ISO9001:2015 quality management system certification, every valve undergoes rigorous inspection and testing to ensure it meets precise performance criteria. With an annual export value ranging between US$1 Million and US$1.5 Million, our products have gained the trust of clients across diverse markets, including North America, South America, Eastern Europe, Southeast Asia, and the Middle East. We ship efficiently from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery to support your project schedules. Choosing our Duplex Stainless Steel Marine Butterfly Valve means investing in a component built for resilience and performance, directly contributing to the efficiency and environmental compliance of your desulfurization system. Contact us today to discuss your specific requirements or to request a detailed quotation.
Frequently Asked Questions (FAQ):
-
Q: Why is duplex stainless steel preferred for marine desulfurization valves?
A: Duplex stainless steel offers a superior balance of strength and corrosion resistance compared to standard stainless steels. It performs exceptionally well in chloride-rich environments (like seawater in scrubbers), resisting pitting and stress corrosion cracking, which are common failure modes in such applications. -
Q: What are the advantages of a PTFE seat in this application?
A: PTFE is chemically inert against most acids, alkalis, and solvents found in desulfurization processes. It provides a reliable, low-friction seal capable of achieving bubble-tight shut-off, which is crucial for controlling process fluids and preventing leaks. -
Q: Can this valve be used with other media besides desulfurization tower fluids?
A: Absolutely. While optimized for FGD service, its construction makes it suitable for a wide range of aggressive chemical services, offshore seawater systems, and other industrial processes requiring corrosion-resistant valves. -
Q: What types of end connections are available?
A: The valve is typically supplied with wafer or lug-style bodies for installation between ANSI, DIN, or JIS standard flanges. Specific flange standards and facing details can be customized to match your existing piping. -
Q: Is the valve suitable for both on/off and modulating (throttling) control?
A: Primarily designed for reliable on/off service, it can be used for moderate throttling when paired with an appropriate actuator and characterized disc. For precise modulating control, specific design considerations should be discussed. -
Q: Do you provide the actuators, or is the valve supplied as a manual unit?
A: We offer flexible supply options. You can purchase the manual valve alone, or we can assemble and supply a complete package with a pneumatic, electric, or hydraulic actuator tailored to your control signal and torque requirements. -
Q: What is the typical delivery lead time for an order?
A: Lead times vary based on order quantity, size, and actuation requirements. Standard sizes may have shorter lead times, while customized orders require more detailed planning. We provide estimated timelines upon quotation to help with your project planning. -
Q: What quality assurance and testing procedures are in place?
A: Our manufacturing process adheres to ISO9001 standards. Valves undergo material verification, dimensional checks, pressure testing (shell and seat), and operational torque testing to ensure they meet specified performance and safety standards before shipment.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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