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Marine Duplex Stainless Steel Ball Valve ASTM A182 F51, DN50-DN300, PN16-PN40
Product Spotlights
Marine-grade Duplex Stainless Steel (ASTM A182 F51) ball valves offering exceptional strength and chloride corrosion resistance for harsh seawater applications. Available in DN50-DN300 sizes and PN16/PN40 pressure ratings. Features reliable sealing, durable construction, and optional automation. Ideal for offshore, shipboard, and chemical systems, ensuring long service life and reduced maintenance. ISO9001 certified manufacturer with global export experience.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Other, Duplex Stainless Steel ASTM A182 F51
Application:
Other, Marine
Size Range:
DN50 to DN300
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Duplex Stainless Steel ASTM A182 F51
Application
Other, Marine
Size Range
DN50 to DN300
Pressure Rating
PN16 to PN40
Connection Standard
Flanged as per relevant standards
Operation Type
Manual lever/gear or pneumatic/hydraulic actuator
Seat Material
PTFE or metal seats, optional
Design Standard
API 6D, API 608, or equivalent
Temperature Range
Suitable for a wide range, details available
Fire Safe Design
Optional, available upon request
As a professional manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our premium Marine Duplex Stainless Steel Ball Valve series. Engineered for demanding marine and offshore applications, this valve combines the superior corrosion resistance of Duplex Stainless Steel (ASTM A182 F51) with robust construction to ensure long-lasting performance in harsh, saline environments. Our valves, produced under a strict ISO9001:2015 certified quality management system, are designed to meet the rigorous standards of global maritime operations, providing a dependable sealing solution for critical fluid control systems on vessels and offshore platforms.
This valve series is specifically crafted to handle challenging media, including seawater, chlorides, and various aggressive chemicals, making it an ideal choice for ballast systems, cooling lines, fuel handling, and other essential shipboard services. We understand the critical need for durability and minimal maintenance in marine applications, which is why our design focuses on exceptional strength and pitting resistance. With an annual export value reflecting our growing international trust, we supply these high-performance valves to key markets worldwide, ensuring seamless logistics from major ports like Shanghai, Guangzhou, and Hong Kong.
Core Product Features & Technical Advantages:
- Superior Material Performance: Constructed from ASTM A182 F51 Duplex Stainless Steel, offering approximately twice the yield strength of standard 316 stainless steel and excellent resistance to stress corrosion cracking, pitting, and crevice corrosion. This material is ideal for prolonged exposure to seawater.
- Robust Pressure & Size Range: Available in a comprehensive size spectrum from DN50 (2") to DN300 (12") and pressure classes PN16 and PN40, providing versatile solutions for various system pressure requirements in marine piping networks.
- Reliable Sealing & Operation: Features precision-machined ball and stem for smooth 90-degree operation. Standard seats are PTFE for reliable bubble-tight sealing and low torque, with metal seat options available for higher temperature or more abrasive services.
- Durable Construction & Design: The full port or standard port design minimizes pressure drop. The robust one-piece or two-piece body construction (depending on size) ensures structural integrity. Anti-static and fire-safe design features are available as optional configurations to meet specific project specifications.
- Extended Service Life: The combination of duplex steel's corrosion resistance and high-quality internal components significantly reduces wear, erosion, and the frequency of maintenance, leading to lower total cost of ownership for ship operators.
Key Technical Specifications:
| Parameter | Specification / Details |
|---|---|
| Body Material | ASTM A182 F51 (UNS S31803) Duplex Stainless Steel |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN150, DN200, DN250, DN300 |
| Pressure Rating | PN16 (Class 150) & PN40 (Class 300) |
| End Connection | Flanged, RF or RTJ face as per ASME B16.5 / EN1092-1 or other standards |
| Seat Material (Standard) | Reinforced PTFE (RPTFE) |
| Stem Seals | Graphite or PTFE based packing, adjustable |
| Operation | Manual Lever, Gear Operator, or Pneumatic/Hydraulic Actuator (optional) |
| Test Standards | Shell Test & Seat Leakage Test per API 598 / ISO 5208 |
Benefits for Your Marine Operations:
- Enhanced Safety & Reliability: The robust duplex steel construction and reliable sealing ensure safe containment of fluids, preventing leaks that could lead to environmental hazards or system failures at sea.
- Reduced Maintenance & Downtime: Exceptional corrosion resistance translates to fewer replacements and repairs, maximizing vessel uptime and operational efficiency.
- Cost-Effective Solution: While the initial investment may be higher than standard stainless valves, the extended service life and reduced maintenance costs offer a superior return on investment over the valve's lifecycle.
- Global Compliance & Compatibility: Designed to meet common international marine and industrial standards, facilitating easy integration into new builds or retrofit projects worldwide.
- Flexible Configuration: Available with various operator types and optional features (like lockable devices, position indicators, and different flange standards) to match your specific system design.
Backed by Shanghai Zhibang Valve's established manufacturing expertise since 2016 and a proven track record of exporting to over a dozen major global markets—including North America, Europe, Southeast Asia, and the Middle East—you can be confident in the quality and consistency of our products. Our ISO9001 certification is a testament to our unwavering commitment to systematic quality control throughout the production process. We are dedicated to providing not just a valve, but a reliable, long-term partnership for your fluid control needs. Contact us today to discuss your project specifications, request a detailed quotation, or learn more about how our Marine Duplex Stainless Steel Ball Valves can enhance the reliability and efficiency of your maritime operations.
Frequently Asked Questions (FAQ):
-
Q: What are the main advantages of using Duplex Stainless Steel (F51) for marine valves instead of 316L?
A: Duplex Stainless Steel F51 offers significantly higher strength (approximately double the yield strength) and superior resistance to chloride-induced stress corrosion cracking, pitting, and crevice corrosion. This makes it far more durable and reliable for long-term exposure to seawater and other aggressive marine environments compared to standard 316L. -
Q: Can this valve be used for both on/off service and flow control (throttling)?
A: This ball valve is primarily designed for reliable on/off (isolation) service. While it can be used for moderate throttling in some applications, it is not generally recommended for precise flow control or severe throttling duties, as this can lead to accelerated erosion of the soft seats and potential cavitation. -
Q: Are these valves suitable for cryogenic or high-temperature services?
A: Duplex stainless steel has good low-temperature toughness, making it suitable for many cryogenic applications. For high-temperature services, the limitation is typically the seat material. Standard PTFE seats have a temperature limit. For elevated temperatures, metal-seated versions or alternative high-performance polymer seats can be offered. Please consult with us for your specific temperature requirements. -
Q: What actuator options are available, and can you supply the complete assembly?
A: Yes, we can provide a complete valve package. We offer manual operation via lever or gearbox for larger sizes. For automated control, we can supply pneumatic (double-acting or spring-return) or hydraulic actuators. Our technical team can help select and mount the appropriate actuator based on your torque requirements and control signals. -
Q: Do you provide documentation like material test certificates (MTC) and inspection reports?
A: Yes, we provide full traceability and documentation. For each order, we can supply Material Test Certificates (MTCs) for the main components (body, ball, stem) as per ASTM/EN standards, along with final inspection and test reports (e.g., pressure test reports) as per the agreed-upon specifications. This is part of our standard quality assurance process. -
Q: What is the typical lead time for an order of DN100 PN40 valves?
A: Lead times vary based on order quantity, specific configuration (actuator type, special testing), and current production schedule. Standard configured valves often have shorter lead times. We recommend contacting our sales team with your detailed requirements for an accurate production and delivery schedule. Our multiple shipment ports ensure flexible logistics. -
Q: Are these valves fire-safe certified?
A: Fire-safe design is an optional feature. We can manufacture valves that comply with common fire-safe testing standards such as API 607, API 6FA, or ISO 10497. If your project requires fire-safe certification, please specify this during inquiry so we can configure the valve accordingly with metal secondary seals and appropriate design features. -
Q: Can you customize the valve, such as with special trim, extended stems, or different painting?
A: Absolutely. As a manufacturer, we have the flexibility to offer various customizations. This includes special trim materials for specific corrosive media, extended stems for insulated lines, different surface finishes, and specific paint coatings (e.g., marine-grade epoxy) as per client specifications. Discuss your needs with our engineering team.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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