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Help CenterLarge Diameter DN400 Butterfly Valve, Lug Type Construction for Marine Pipeline Isolation
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As a dedicated manufacturer with ISO9001 certified processes, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing robust and reliable valves for demanding industrial applications. Our Large Diameter DN400 Butterfly Valve with Lug Type Construction is engineered specifically for secure isolation in marine pipeline systems. This valve offers a practical and durable solution for controlling fluid flow in large-diameter pipes, combining ease of operation with long-term performance in challenging environments.
The core value of this valve lies in its lug-type design, which allows for easy installation and removal without disassembling the entire pipeline—a critical feature for maintenance and repair operations. Its large DN400 size caters to the high-flow requirements common in marine settings, such as ballast systems, fuel transfer lines, or seawater cooling circuits. Built with quality materials and precise manufacturing, this valve ensures a tight seal and reliable shut-off, contributing to system safety and efficiency.
Key Features & Technical Specifications:
- Lug Type Construction: The valve body features threaded lugs (or through-holes) around its flanges. This design enables the valve to be bolted between two pipeline flanges, acting as a standalone isolation point. It is particularly advantageous for end-of-line service or where the valve needs to be supported independently.
- Large Diameter Design: The DN400 (approximately 400mm) nominal diameter is suitable for high-volume flow applications, reducing pressure drop and enabling efficient fluid handling.
- Durable Material Options: Typical construction includes a cast steel or ductile iron body for strength and corrosion resistance. The disc is often made from stainless steel (e.g., 304, 316) or coated carbon steel to withstand marine conditions. The seat material, such as EPDM or PTFE, provides effective sealing and longevity.
- Versatile Actuation: The valve can be operated via a manual hand lever, a gearbox for easier torque application, or an automated pneumatic/electric actuator for remote control integration.
- Flanged Connection: Standard flanged ends (e.g., ANSI, DIN, JIS) ensure compatibility with common marine pipeline fittings, facilitating straightforward installation.
- Robust Sealing Performance: Designed to achieve bubble-tight shut-off in many applications, minimizing leakage and ensuring system integrity during isolation.
Detailed Parameters (Common Specifications):
| Parameter | Typical Value / Option |
| Nominal Diameter (DN) | 400 mm |
| Pressure Rating (PN) | PN10, PN16 (others customizable) |
| Body Material | Cast Steel WCB, Ductile Iron |
| Disc Material | Stainless Steel 304/316, Coated Carbon Steel |
| Seat Material | EPDM, PTFE, NBR (available upon request) |
| Connection Type | Flanged (ANSI, DIN, JIS standards) |
| Operation Type | Manual Lever, Gearbox, Pneumatic/ Electric Actuator (optional) |
| Temperature Range | -20°C to +120°C (depending on seat material) |
| Application | Marine Pipeline Isolation (Ballast, Fuel, Cooling, etc.) |
Advantages & Customer Benefits:
- Simplified Installation & Maintenance: The lug design allows the valve to be installed or removed without cutting the pipe, saving time and labor during setup or repair.
- Effective Flow Control: The large diameter minimizes flow resistance, supporting efficient system operation with lower energy loss.
- Enhanced Safety for Isolation: Provides a secure, bubble-tight shut-off point, crucial for isolating sections of a marine pipeline for safety checks or emergency repairs.
- Corrosion Resistance: Material selections like stainless steel discs and protective coatings enhance durability in salty, humid marine environments.
- Operational Flexibility: Availability of manual, geared, or actuated operation modes allows customization based on control requirements and automation level.
- Cost-Effectiveness: Compared to other large-diameter valve types, butterfly valves often offer a more economical solution with reliable performance.
Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, has built a solid reputation through consistent quality and reliable delivery. Our ISO9001 certification underpins our commitment to standardized manufacturing processes. With an annual export value ranging between US$1 Million and US$1.5 Million, we serve a global clientele across North America, South America, Europe, Asia, Africa, and Oceania, demonstrating our product's acceptance in diverse markets. We ship from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring logistical efficiency. This DN400 Lug Type Butterfly Valve embodies our expertise in crafting valves that meet the rigorous demands of marine applications. Its design prioritizes functionality, durability, and user convenience, making it a dependable choice for your pipeline isolation needs.
For projects requiring secure, large-diameter flow control in marine environments, this valve offers a proven solution backed by our manufacturing experience and quality assurance. Contact us to discuss your specific requirements, obtain detailed quotations, or explore customization options for materials, actuation, or standards.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of a lug-type butterfly valve over a wafer-type?
A: A lug-type valve has threaded holes (lugs) on both sides, allowing it to be bolted directly between two pipeline flanges and serve as an independent isolation point. This makes installation and removal easier, especially at the end of a line, without needing to support the pipe. Wafer-type valves rely on the pipeline flanges for compression and are typically sandwiched between them. -
Q: Is this DN400 valve suitable for high-pressure marine applications?
A: Our standard valves are commonly rated for PN10 or PN16 pressure classes. For higher pressure requirements, we can discuss custom designs with reinforced materials and construction. Please provide your specific pressure rating needs for evaluation. -
Q: Can the valve be operated automatically?
A: Yes. While it comes with a standard manual lever, options for gear operation or pneumatic/electric actuators are available. Actuators enable remote or automated control, integrating with your marine control systems. -
Q: What materials are recommended for use in seawater pipelines?
A: For corrosive seawater applications, we typically recommend a stainless steel disc (316 stainless steel offers better chloride resistance) and an EPDM or PTFE seat. The body material can be cast steel with appropriate coatings or treatments for extra protection. -
Q: How is the valve shipped, and what are the lead times?
A: We ship from ports in Shanghai, Guangzhou, Hong Kong, and Beijing. Lead times depend on order quantity, customization, and current production schedule. Standard configurations generally have shorter delivery periods. -
Q: Does the valve come with any certifications?
A: Our manufacturing facility is ISO9001 certified, ensuring quality management systems. The valve itself can be produced to meet common industry standards (like ANSI, DIN). Specific product certifications can be discussed based on your project requirements. -
Q: Can I request flanges matching a specific standard (e.g., ANSI, JIS)?
A> Absolutely. We can manufacture the valve with flanges conforming to various international standards, including ANSI, DIN, JIS, etc. Please specify your required flange standard during inquiry. -
Q: What maintenance is required for this butterfly valve in marine service?
A> Regular inspection of the disc and seat for wear or corrosion is advised. Depending on the seat material, operational temperature, and fluid, the seat may need periodic replacement. The actuator (if equipped) should be checked according to its manufacturer's guidelines. Proper installation and occasional lubrication of the stem can enhance longevity.
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