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Help CenterDuplex Stainless Steel Marine Butterfly Valve DN50-DN600 for FPSO Offshore Systems
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As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for the demanding offshore industry. Our Duplex Stainless Steel Marine Butterfly Valves, designed specifically for FPSO (Floating Production Storage and Offloading) systems and offshore applications, represent the pinnacle of corrosion resistance and structural integrity. Engineered to withstand harsh marine environments, these valves ensure long-term, maintenance-free operation, protecting your critical offshore assets and enhancing operational safety. We combine advanced manufacturing expertise with a deep understanding of marine engineering requirements to deliver valves that meet the stringent standards of global offshore projects.
The core value of this valve lies in its exceptional material performance. Constructed from Duplex Stainless Steel, it offers superior strength and chloride stress corrosion cracking resistance compared to standard austenitic stainless steels, making it an ideal choice for seawater, brackish water, and hydrocarbon service on FPSOs. The compact and lightweight butterfly design allows for easy installation and operation even in space-constrained offshore modules.
Key Features & Technical Advantages:
- Superior Corrosion & Erosion Resistance: The duplex stainless steel body and disc provide excellent resistance to pitting, crevice corrosion, and erosion caused by sand-laden fluids, ensuring a prolonged service life in aggressive offshore conditions.
- High Strength & Lightweight Design: Duplex steel offers approximately twice the yield strength of 316L stainless steel, allowing for a more compact and lighter valve design without compromising pressure integrity, which is crucial for weight-sensitive offshore topsides.
- Bubble-Tight Shut-off: Precision-machined disc and a resilient seat (options include PTFE, EPDM, FKM) ensure reliable, bubble-tight sealing, minimizing product loss and environmental risk.
- Versatile Actuation Options: Available with manual lever, gearbox, pneumatic, or electric actuators to suit specific automation and control requirements of FPSO systems.
- Low Maintenance & Operational Cost: The robust design and corrosion-resistant materials significantly reduce the need for frequent maintenance, lowering the total cost of ownership over the valve's lifecycle.
- Bi-directional Flow Capability: Designed to seal effectively against pressure from either direction, providing flexible installation in complex piping layouts.
Technical Specifications:
| Parameter | Specification |
| Size Range (DN) | 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600 |
| Pressure Rating | PN10/16/25/40 (Standard), Class 150/300 (Available) |
| Body & Disc Material | Duplex Stainless Steel (UNS S32205/S31803) |
| Stem Material | style='padding: 8px; border: 1px solid #ddd;'>17-4PH Stainless Steel or Duplex Steel|
| Seat Material | PTFE (Standard), EPDM, FKM/Viton (Optional) |
| Temperature Range | -20°C to +200°C (varies with seat material) |
| Operation | Manual (Lever/Gear), Pneumatic Actuator, Electric Actuator |
| Face-to-Face | Per ISO 5752 Standard |
| Flange Standard | ISO, ASME, DIN, JIS, etc. (Customizable) |
Benefits for Your Offshore Operations:
- Enhanced System Reliability: Reduces unplanned downtime caused by valve failure in critical seawater cooling, firewater, ballast, or process lines.
- Improved Safety: Reliable sealing performance helps contain hydrocarbons and other hazardous fluids, supporting overall platform safety.
- Cost-Effective Lifecycle: The high initial investment in duplex steel is offset by dramatically reduced replacement and maintenance costs over decades of service.
- Global Project Compatibility: Manufactured to international standards, these valves are suitable for integration into FPSO projects worldwide, supplied from major ports like Shanghai, Guangzhou, and Hong Kong.
Trust in a manufacturer with a proven track record. Since our establishment in 2016, Shanghai Zhibang Valve has consistently delivered high-performance valves, achieving an annual export value between US$1 Million and US$1.5 Million. Our products are trusted by clients across diverse and demanding markets, including North America, South America, Europe, Southeast Asia, Africa, and the Middle East. Our ISO9001 certification is a testament to our commitment to consistent quality and reliable performance in every valve we produce. For your next FPSO or offshore project requiring durable, corrosion-resistant butterfly valves from DN50 to DN600, partner with us. Contact our team today to discuss your specifications, request a detailed quote, or learn more about how our solutions can enhance the reliability of your offshore systems.
Frequently Asked Questions (FAQ):
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Q: Why is Duplex Stainless Steel preferred for marine butterfly valves over 316L?
A: Duplex stainless steel offers a superior combination of strength and corrosion resistance. It has roughly double the yield strength of 316L, allowing for lighter valve designs, and significantly better resistance to chloride-induced stress corrosion cracking, which is a common failure mode in offshore seawater applications. -
Q: Are these valves suitable for both seawater and hydrocarbon service on an FPSO?
A: Yes, the duplex stainless steel construction provides excellent resistance to both chloride-containing media like seawater and many hydrocarbons. However, the specific seat material should be selected based on the fluid's chemical compatibility and temperature. -
Q: What actuation options do you recommend for remote operation on an offshore platform?
A: For automated control, pneumatic or electric actuators are standard recommendations. The choice depends on your platform's available power source (air or electricity) and specific control requirements (on/off or modulating). We can supply the valve with a pre-mounted actuator. -
Q: Can you provide valves with specific flange standards like ASME B16.5 or DIN?
A: Absolutely. We regularly manufacture valves to meet various international flange standards including ASME, DIN, JIS, and ISO. Please specify your required standard and pressure class when inquiring. -
Q: What is the typical delivery lead time for an order of DN300 valves?
A: Lead times vary based on order quantity, actuation requirements, and current production schedule. Generally, standard configurations have shorter lead times. We provide accurate delivery estimates upon receipt of your detailed inquiry. -
Q: Do you offer fire-safe design certifications for these valves?
A: Fire-safe designs compliant with standards like API 607 or ISO 10497 are available upon request. Please indicate this requirement in your project specifications. -
Q: How do you ensure quality control for critical offshore applications?
A: Our ISO9001 certified quality management system governs every stage, from material sourcing to final testing. Valves can undergo additional tests such as shell test, seat leak test, and material verification as per project requirements. -
Q: What are the main ports you ship from, and do you handle export documentation?
A: We ship from major Chinese ports including Shanghai, Guangzhou, and Hong Kong. We handle all necessary export documentation, packing, and logistics to deliver the valves to your designated port.
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