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Standard Compliant Marine Double Eccentric Butterfly Valve for Shipbuilding
Product Spotlights
Marine-grade double eccentric butterfly valve designed for shipbuilding. Features offset disc design for long seat life and bubble-tight shut-off in seawater, ballast, and fuel systems. Constructed with corrosion-resistant materials like coated cast iron and bronze. Offers low torque operation, compact design, and is compliant with maritime industry standards. Available in sizes DN50 to DN1200 with various actuation options.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Shipbuilding and Marine Systems
Type:
Double Eccentric Butterfly Valve
Design Standard:
Marine Industry Compliant
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Shipbuilding and Marine Systems
Type
Double Eccentric Butterfly Valve
Design Standard
Marine Industry Compliant
Body Material
Cast Steel / Ductile Iron / Stainless Steel
Disc Material
Stainless Steel / Nickel Aluminum Bronze
Seat Material
EPDM / PTFE / Metal Seated
Operation
Lever / Gearbox / Actuator (Optional)
Connection
Wafer / Lug / Flanged
Size Range
DN50 to DN1200 (2“ to 48“)
Pressure Rating
PN10 / PN16 / PN25 / Class 150
As a specialized manufacturer with a focus on marine fluid control solutions since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our Standard Compliant Marine Double Eccentric Butterfly Valve. Engineered specifically for the rigorous demands of shipbuilding and offshore applications, this valve represents a fusion of robust engineering, material science, and adherence to international maritime standards. Our annual export volume of US$1-1.5 million to global markets, including North America, Europe, and Southeast Asia, is a testament to the reliability and performance our valves deliver in critical marine environments. This product is designed to offer shipyards, naval architects, and marine engineers a dependable, long-lasting sealing solution for seawater, ballast, cooling, and fuel oil systems.
Core Product Features & Technical Advantages:
- Double Eccentric (Double Offset) Design: The disc is offset from both the seat centerline and the valve bore centerline. This geometry minimizes wear by ensuring the disc only contacts the seat at the final moment of closure, significantly extending seat life and reducing operating torque.
- Marine-Grade Material Construction: We utilize materials proven in saline and corrosive environments. Common configurations include a cast steel or ductile iron body with epoxy coating, a stainless steel or nickel aluminum bronze disc, and resilient seats like EPDM or PTFE. Metal-seated versions are available for high-temperature applications.
- Bubble-Tight Shut-Off: The precision-machined eccentric design allows for a reliable, bubble-tight seal, which is crucial for system isolation, tank level control, and preventing seawater ingress or product loss.
- Low Operating Torque & Easy Actuation: The reduced friction from the eccentric design allows for smoother operation with lower torque, enabling the use of smaller, more cost-effective manual gearboxes, pneumatic actuators, or electric actuators.
- Compact & Lightweight Design: Compared to gate or globe valves, the butterfly valve design offers a significant space and weight saving, a critical factor in ship design where every kilogram and cubic meter counts.
- Bi-Directional Flow Capability: Properly designed for reliable sealing against pressure from either direction, offering flexibility in piping system layout.
- Maintenance-Friendly: Many models feature a top-entry design, allowing for seat replacement or internal inspection without removing the valve body from the pipeline, drastically reducing downtime during maintenance.
Technical Specifications & Configuration Options:
| Parameter | Specification / Option |
| Valve Type | Double Eccentric (Double Offset) Butterfly Valve |
| Design & Test Standards | Compliant with marine industry norms (e.g., ABS, DNV, LR, BV principles). ISO 9001 certified manufacturing. |
| Size Range (Nominal Diameter) | DN50 (2") to DN1200 (48") – Standard and custom sizes available. |
| Pressure Rating | PN10, PN16, PN25, Class 150. Higher ratings available upon request. |
| Temperature Range | -20°C to +180°C (varies with seat material; EPDM: -20°C to +120°C, PTFE: -30°C to +180°C). |
| End Connection | Wafer, Lug, or Double Flanged. Materials and facing per standard. |
| Operation Method | Manual Lever, Worm Gear Operator, Pneumatic Actuator, Electric Actuator. Options customizable. |
Benefits for Your Marine Project:
- Enhanced System Reliability: The robust design and quality materials minimize the risk of in-service failure, contributing to overall vessel safety and operational uptime.
- Reduced Lifecycle Cost: Longer service intervals, easy maintenance, and durable components lead to lower total cost of ownership over the vessel's lifespan.
- Design Flexibility: A wide range of sizes, materials, and actuation options allows engineers to specify the perfect valve for each specific service (seawater, fuel, lube oil, etc.).
- Streamlined Procurement: Sourcing from an ISO 9001 certified manufacturer with extensive export experience ensures consistent quality, reliable documentation, and smooth logistics from ports like Shanghai, Guangzhou, or Hong Kong.
Frequently Asked Questions (FAQ):
-
Q: What is the key difference between a double eccentric and a concentric butterfly valve for marine use?
A: A concentric valve has the disc stem centered in the seat. A double eccentric valve offsets the stem, reducing seat contact and wear dramatically. This results in a longer-lasting seal, especially critical for abrasive media like seawater with silt, and allows for higher pressure ratings and bubble-tight shut-off, making it the preferred choice for demanding marine applications. -
Q: Can this valve be used for both seawater and fuel oil systems?
A: Yes, but the material specification must be chosen accordingly. For seawater, we recommend a combination like epoxy-coated ductile iron body with a nickel aluminum bronze disc and EPDM seat. For fuel oil, a stainless steel disc with a compatible seat material (like PTFE) would be specified. Our engineering team can advise on the optimal configuration. -
Q: Do you provide valves with specific marine society approvals (ABS, DNV, etc.)?
A: Our valves are manufactured to be compliant with the general principles and material requirements of major marine classification societies. For projects requiring formal type approval certificates from a specific society, this can be arranged upon request and may involve additional testing and documentation. -
Q: What is the typical delivery lead time for a standard size order?
A: For standard configurations and materials in our regular inventory, lead times can range from 4 to 8 weeks. Customized specifications, larger sizes, or special materials may require additional production time. We provide clear timelines upon order confirmation. -
Q: How does the valve handle potential cavitation in seawater pump discharge lines?
A: While butterfly valves can be susceptible to cavitation, the double eccentric design and proper material selection improve resistance. For high-pressure drop applications, we can advise on specific disc profiles, staggered opening/closing procedures, or the potential need for a multi-stage pressure reduction solution. -
Q: Is on-site technical support or installation guidance available?
A> Yes, we can provide detailed installation, operation, and maintenance manuals. For large projects or complex installations, technical support and field service can be arranged. Our team is experienced in supporting global clients across our main markets from North America to Oceania. -
Q: Are spare parts like seals and seats readily available?
A> Absolutely. We maintain an inventory of critical spare parts for our valve models. We recommend purchasing a recommended spare parts kit with your initial order to ensure quick maintenance turnaround and minimize vessel downtime in any global port. -
Q: Can the valve be fitted with a position indicator or limit switches for remote monitoring?
A> Yes, this is a standard option when ordering an actuated valve (pneumatic or electric). We can integrate mechanical or electronic position indicators, limit switches, and solenoid valves as part of a complete automation package to interface with your ship's control system.
Backed by our ISO 9001 certified quality management system and nearly a decade of manufacturing expertise, every Marine Double Eccentric Butterfly Valve from Shanghai Zhibang is built to perform. Our proven track record, evidenced by consistent annual exports valued between US$1 million and US$1.5 million to diverse and demanding regions like Eastern Europe, Southeast Asia, and the Middle East, underscores the global trust in our products. We combine rigorous production control with flexible logistics from multiple Chinese ports to deliver valves that meet the precise needs of shipbuilders worldwide. Choose a valve partner committed to reliability, compliance, and value. Contact us today to discuss your project specifications, request a detailed quotation, or consult with our technical team for a tailored fluid control solution.
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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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