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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600

Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600

Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600 thumbnail-3

Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600 thumbnail-4

Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600 thumbnail-5

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Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600 photo-2

Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600 photo-3

Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600 photo-4

Ductile Iron Marine Lug Butterfly Valve, PN16 Rated, Sizes DN400 and DN600 photo-5

Product Spotlights

Ductile iron construction ensures high strength and impact resistance for demanding marine service. PN16 pressure rating and lug-style design provide reliable, bi-directional shut-off suitable for shipboard and offshore systems. Available in large DN400 and DN600 sizes, it features corrosion-resistant epoxy coating and optional EPDM/NBR seats. Designed for low-torque operation and adaptable to various actuators, it offers durability and reduced maintenance for cost-effective fluid control.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Marine

Material:

Ductile Iron Body and Disc

Pressure Rating:

PN16

Contact Supplier Request Quote Chat Now

Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Application Other, Marine

Material Ductile Iron Body and Disc

Pressure Rating PN16

Available Sizes DN400, DN600

Connection Type Lug (Double Flanged)

Seat Material EPDM or NBR (optional)

Operation Manual Gear, Electric Actuator (optional)

Design Standard API 609, ISO 5752

Surface Treatment Epoxy Coating

As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for demanding industrial and marine applications. Our Ductile Iron Marine Lug Butterfly Valve, rated PN16 and available in DN400 and DN600 sizes, is engineered to deliver exceptional performance in corrosive and high-pressure marine environments. With an annual export value demonstrating our global reach across continents from North America to Southeast Asia, we understand the critical need for valves that offer durability, ease of operation, and long-term cost-effectiveness. This valve represents our commitment to quality, backed by ISO9001 certification, ensuring every product meets stringent manufacturing standards.

This lug-style butterfly valve is specifically designed for marine and offshore applications where secure, bi-directional shut-off is required between flanges. Its robust construction and thoughtful design address common challenges such as corrosion, space constraints, and maintenance accessibility onboard vessels and offshore platforms.

Key Features & Technical Advantages:

Superior Durability: The valve body and disc are constructed from high-grade ductile iron (nodular cast iron), offering excellent tensile strength, impact resistance, and pressure-bearing capability compared to standard cast iron, making it ideal for the dynamic stresses of marine service.
Corrosion Resistance: A high-quality epoxy coating is applied to all external surfaces, providing a formidable barrier against saltwater, humid air, and other corrosive elements prevalent in marine atmospheres.
Reliable Sealing: Equipped with a resilient seat (EPDM for seawater/freshwater or NBR for oils) that ensures a bubble-tight seal. The seat is lock-ring retained, preventing displacement and ensuring long-term sealing integrity.
Lug Design Benefits: The lug-style body allows the valve to be installed between two flanges using bolts, with the valve's lugs carrying the weight of the piping. This design permits the removal of downstream piping for maintenance without affecting the valve or upstream line, a crucial feature for system flexibility.
Optimized Flow & Low Torque: The disc profile is aerodynamically designed to minimize turbulence and pressure drop across the valve. Combined with a precision-machined stem and low-friction bearings, this results in exceptionally smooth and low-torque operation, reducing the effort required from manual gear operators or the size of electric actuators.
Versatile Actuation: The valve is furnished with a manual gear operator as standard, providing precise control. It is also readily adaptable to electric, pneumatic, or hydraulic actuators for remote or automated control systems, available upon request.

Technical Specifications:

Parameter	Specification
Design Standard	API 609, ISO 5752
Pressure Rating	PN16 (16 bar)
Temperature Range	-10°C to +120°C (with EPDM seat)
Body Material	Ductile Iron
Disc Material	Ductile Iron, Epoxy Coated
Stem Material	Stainless Steel (AISI 420 or equivalent)
Seat Material	EPDM (Standard for water), NBR (Optional for oils)
Operation	Manual Gear (Standard), Electric/Pneumatic Actuator (Optional)

Benefits for Your Operations:

Reduced Maintenance & Downtime: The durable materials and corrosion-resistant coating significantly extend service intervals and valve life, minimizing unplanned maintenance and associated vessel or platform downtime.
Enhanced System Safety & Reliability: The robust PN16 pressure rating and secure lug design ensure safe operation under demanding conditions, protecting your personnel, equipment, and cargo.
Cost-Effective Solution: Compared to gate or globe valves of similar size, butterfly valves offer a more compact, lighter, and often more affordable option with lower operating torque, translating to savings on initial purchase, installation space, and actuation costs.
Global Compliance & Support: Manufactured under an ISO9001-certified quality management system, our valves are designed to meet international marine and industrial standards. With shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure efficient logistics to your location worldwide.

Shanghai Zhibang Valve has built a solid reputation by exporting high-quality valves to diverse markets including North America, Europe, Southeast Asia, and the Middle East. Our experience in serving the global marine industry means we understand the specific requirements for valves used in seawater cooling lines, ballast systems, firefighting systems, fuel oil lines, and general shipboard service. The combination of ductile iron strength, PN16 pressure capability, and marine-grade protection makes this valve a dependable choice for engineers and procurement specialists. We invite you to contact us to discuss your specific application requirements, request detailed quotations, or explore customization options such as different seat materials or actuation packages.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a lug-style butterfly valve over a wafer-style?
A: The lug design allows the valve to be installed using bolts through the valve's lugs, which bear the piping load. This enables the disconnection of the downstream flange for maintenance without removing the entire valve, offering greater system flexibility compared to wafer valves.
Q: Is this valve suitable for seawater applications?
A: Yes, it is designed for marine environments. The ductile iron body with epoxy coating and the standard EPDM seat provide good resistance to corrosion from saltwater. For highly aggressive seawater, specific material upgrades can be discussed.
Q: Can this valve be used for throttling control?
A: While primarily designed for on/off service, the manual gear operator allows for reasonably precise flow modulation. For critical throttling applications, we recommend consulting our engineers for specific disc and actuator recommendations.
Q: What is the delivery lead time for DN400 and DN600 sizes?
A: Standard sizes are typically available from stock or have shorter production cycles. Exact lead times depend on order quantity and specific configuration (like actuator type). Please inquire for a current schedule.
Q: Do you provide certifications with the valves?
A: As an ISO9001-certified manufacturer, we provide a material certificate (CMTR) for the valve body and critical components upon request. Other specific test reports can be arranged.
Q: What types of actuators can be fitted?
A: The valve is designed to be compatible with electric, pneumatic, and hydraulic actuators. We can supply the valve with a manual gear operator only, or provide a complete actuated package tailored to your control system requirements.
Q: Are spare parts like seats and seals available?
A: Yes, we maintain an inventory of critical spare parts, including seal kits and complete seats, to support your maintenance needs and ensure long-term valve operability.
Q: What is the weight and packaging for these large-size valves?
A: DN400 and DN600 valves are substantial. They are securely packaged in wooden crates with internal protection to prevent damage during ocean freight. Specific weight and packaging details are provided with the quotation.