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Home > Industrial Equipment & Components > Valve > Other Valves & Parts > DN400 PN10 Marine Lug Butterfly Valve, Designed for Shipboard Seawater System Piping

DN400 PN10 Marine Lug Butterfly Valve, Designed for Shipboard Seawater System Piping

DN400 PN10 Marine Lug Butterfly Valve, Designed for Shipboard Seawater System Piping thumbnail-3

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DN400 PN10 Marine Lug Butterfly Valve, Designed for Shipboard Seawater System Piping thumbnail-5

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DN400 PN10 Marine Lug Butterfly Valve, Designed for Shipboard Seawater System Piping photo-4

DN400 PN10 Marine Lug Butterfly Valve, Designed for Shipboard Seawater System Piping photo-5

Product Spotlights

DN400 PN10 marine lug butterfly valve designed specifically for corrosive seawater systems. Features corrosion-resistant materials (epoxy-coated body, SS disc, EPDM seat), robust lug design for easy maintenance, and bidirectional sealing. ISO 5211 actuator-ready, low-torque operation, and built for long service life in shipboard cooling, ballast, and firefighting lines.

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

Key Specifications

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Valve Type:

Lug Type Butterfly Valve

Nominal Diameter:

DN400 (16 inch)

Pressure Rating:

PN10 (Class 150)

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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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Valve Type Lug Type Butterfly Valve

Nominal Diameter DN400 (16 inch)

Pressure Rating PN10 (Class 150)

Application Shipboard Seawater System Piping

Body Material Ductile Iron / Cast Iron / Optional

Disc Material Stainless Steel / Duplex / Optional

Seat Material EPDM / NBR / Viton / Optional

Operation Type Lever / Gearbox / Actuator (Optional)

Connection Standard ISO 5211 / DIN / ANSI

Design Standard ISO 5752 / API 609 / MSS SP-67

As a professional manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve is dedicated to providing reliable and durable fluid control solutions for the global marine industry. Our DN400 PN10 Marine Lug Butterfly Valve is engineered specifically for the demanding environment of shipboard seawater systems, where corrosion resistance, reliable sealing, and long service life are paramount. This valve represents our commitment to combining robust construction with precise engineering to meet the stringent requirements of maritime applications. We understand that valve failure in a seawater system can lead to costly downtime and safety concerns, which is why we focus on quality and performance in every unit we produce. With annual exports reaching significant markets worldwide, our products have been tested and trusted in diverse operating conditions.

Product Features & Technical Advantages:

Corrosion-Resistant Construction: The valve body is typically manufactured from ductile iron with epoxy coating or other specified materials to withstand the corrosive effects of seawater. The disc is often made from stainless steel (316, 316L) or duplex stainless steel for enhanced resistance to pitting and crevice corrosion.
Robust Lug Design: The lug-type body allows for easy installation and removal from the pipeline without disturbing the adjacent pipe sections, which is crucial for maintenance in the confined spaces of a ship. The lugs provide a strong, bolted connection that can handle pipeline end loads.
Bidirectional Sealing: The valve is designed to provide effective sealing in both flow directions, a critical feature for systems where flow reversal might occur. The resilient seat (EPDM, NBR, or Viton based on specification) ensures tight shut-off even with suspended solids present in seawater.
Low Torque Operation: The streamlined disc design and low-friction seat material contribute to lower operating torque. This allows for easier manual operation with a lever or reduces the size and cost of required actuators for automated systems.
Extended Service Life: Components are designed for minimal wear. The stem is fully isolated from the media by seals, preventing corrosion and ensuring smooth operation over thousands of cycles. Replaceable seat rings simplify maintenance and extend the valve's overall lifespan.
Versatile Actuation Options: The valve is compatible with various operation methods. It can be supplied with a simple locking lever, a manual gearbox for high-torque applications, or prepared for the mounting of pneumatic, hydraulic, or electric actuators per ISO 5211 standard pad, offering flexibility for different control schemes.

Key Specifications & Benefits for Clients:

The DN400 PN10 specification indicates a valve suitable for large-diameter seawater lines (400mm or 16 inches) with a pressure rating of 10 bar (approximately 150 psi). This makes it ideal for main cooling water intakes, firefighting systems, ballast lines, and other critical seawater services on various vessels.

Parameter	Specification / Value	Client Benefit
Size & Pressure	DN400, PN10 (Class 150)	Handles high flow rates at standard seawater system pressures reliably.
Seat Material (Standard)	EPDM (Ethylene Propylene Diene Monomer)	Excellent resistance to seawater, ozone, and weathering; suitable for temperatures up to 120°C.
Disc Standard Material	CF8M Stainless Steel (AISI 316)	Provides strong corrosion resistance against chlorides in seawater, ensuring disc integrity.
Body Coating	Epoxy Powder Coating (~250μm)	Creates a durable barrier against saltwater corrosion and extends the external life of the valve.
Stem Seal	Double O-ring or Lip Seals	Prevents seawater ingress into the stem area, reducing corrosion and maintenance needs.
Operation	Lever, Gear Operator, or Actuator Ready	Offers flexibility for manual or automated control, fitting into various ship designs.

For shipbuilders, repair yards, and marine equipment suppliers, the primary benefits of choosing this valve include:

Reduced Lifecycle Cost: Durable materials and design minimize the frequency of repairs and replacements.
Enhanced System Reliability: Consistent performance ensures the continuous operation of critical seawater-dependent systems like cooling and firefighting.
Simplified Inventory & Maintenance: The lug design and standardized dimensions make installation and future maintenance procedures more straightforward.
Compliance with Marine Standards: The valve is designed and manufactured to be compatible with common marine piping standards and practices.

Backed by our ISO9001 certification and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang Valve ensures that every DN400 PN10 Marine Lug Butterfly Valve meets rigorous quality control standards. Our products reach key global maritime hubs in North America, Europe, Asia, and beyond, with efficient logistics from major ports like Shanghai and Guangzhou. This valve is more than just a component; it's a commitment to the safety and efficiency of your vessel's operations. We invite you to contact us for detailed specifications, competitive pricing, and to discuss how we can tailor this solution to your specific project requirements. Let us be your trusted partner for reliable marine valve solutions.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a lug-type butterfly valve over a wafer-type for marine applications?
A: The lug-type design allows the valve to be installed using bolts through the lugs, which can support the weight of the piping on either side. This makes it suitable for end-of-line service or where the pipeline needs to be disconnected for maintenance without supporting the adjacent pipe sections—common scenarios in shipboard systems.
Q: Is the PN10 pressure rating sufficient for seawater systems?
A: Yes, PN10 (10 bar nominal pressure) is a standard and commonly specified rating for many shipboard seawater systems, including cooling water, ballast, and general service lines. It corresponds to Class 150, which is widely used in marine piping. For higher-pressure applications, other ratings are available upon request.
Q: Can you provide valves with different seat materials?
A: Absolutely. While EPDM is our standard for seawater due to its excellent properties, we can supply valves with Nitrile (NBR) for oil resistance or Fluorocarbon (Viton/FKM) for higher temperature and chemical resistance, depending on the specific media and operating conditions in your system.
Q: Are these valves suitable for use with actuators?
A: Yes. The valve is designed with an ISO 5211 standard mounting pad on the top of the stem, making it directly compatible with a wide range of pneumatic, electric, or hydraulic actuators. We can supply the valve alone or as a complete actuated package.
Q: What certifications do you have for marine valves?
A> Our manufacturing facility is ISO9001 certified, ensuring a consistent quality management system. Specific product certifications (like ABS, DNV, BV, etc.) can be arranged upon request and are subject to additional testing and survey.
Q: What is the typical lead time for an order of DN400 valves?
A: Lead time depends on the order quantity and specific configuration (material, operation type). For standard configurations, we generally maintain a competitive production schedule. Please contact our sales team with your quantity requirements for an accurate delivery estimate.
Q: Do you offer customization for special requirements?
A: Yes, we have engineering capabilities to discuss modifications such as special coatings, extended stems for insulated lines, different flange standards (ANSI, JIS), or material upgrades (duplex stainless steel, super duplex).
Q: What are the main shipping ports and markets you serve?
A> We ship regularly from Shanghai, Guangzhou, Hong Kong, and Beijing ports. Our main markets include North America, South America, Europe, Southeast Asia, Africa, and the Middle East, serving both shipyards and marine equipment distributors globally.