Contact Platform Support
Help Center
Home > Industrial Equipment & Components > Valve > Other Valves & Parts > DN400 Lug Butterfly Valve for Ship Main Engine Cooling Water Intake Lines
DN400 Lug Butterfly Valve for Ship Main Engine Cooling Water Intake Lines
Product Spotlights
DN400 lug-type butterfly valve designed for ship engine cooling water intakes. Features marine-grade corrosion-resistant materials (stainless steel disc, coated body, EPDM seat), ensuring reliable performance in seawater. Lug design allows for easy end-of-line installation and maintenance. Offers bubble-tight shut-off, low pressure drop, and is compatible with manual, gear, or actuator operation. Built to ISO standards, providing durability and system reliability for critical marine applications.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Valve Type:
Lug Type Butterfly Valve
Nominal Diameter (DN):
400
Connection Type:
Lug
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
Related Products
-
Cast Iron Lug Butterfly Valve DN400, Marine Grade, Manual Gearbox OperationNegotiableMOQ: 1 Unit -
DN400 Marine Lug Butterfly Valve Supplied With Mill Test Report and WarrantyNegotiableMOQ: 1 Unit
-
DN400 PN10 Marine Lug Butterfly Valve, Designed for Shipboard Seawater System PipingNegotiableMOQ: 1 Unit
-
Triple Eccentric Hard Seal Butterfly Valve for Shipboard Steam Lines up to 10MPa PressureNegotiableMOQ: 1 Unit
-
Triple Eccentric Marine Butterfly Valve for Cargo Tank Isolation on Chemical TankersNegotiableMOQ: 1 Unit
Valve Type
Lug Type Butterfly Valve
Nominal Diameter (DN)
400
Connection Type
Lug
Body Material
Cast Iron / Ductile Iron / Optional
Disc Material
Stainless Steel / Optional
Seat Material
EPDM / NBR / Optional
Operating Pressure
PN10 / PN16 / Customizable
Operation Type
Manual Lever / Gearbox / Actuator
Application
Ship Main Engine Cooling Water System
Design Standard
ISO / DIN / AWWA / Customizable
As a leading manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance industrial valves for global markets. Our DN400 Lug Butterfly Valve is engineered specifically for the demanding environment of ship main engine cooling water intake lines, where reliability and durability are non-negotiable. With over 8 years of manufacturing expertise and an annual export value exceeding US$1 million, we understand the critical role these valves play in maritime operations. This valve is designed to offer superior flow control, exceptional sealing performance, and long service life, ensuring the continuous and efficient operation of your vessel's cooling system. We combine robust construction with precise engineering to deliver a product that meets the stringent requirements of marine applications worldwide.
This DN400 Lug Butterfly Valve is a cornerstone component for managing seawater or freshwater intake in ship engine cooling systems. Its lug-type design allows for easy installation and removal without disassembling the entire pipeline, which is a significant advantage during maintenance or inspection periods. The valve is constructed to withstand the corrosive nature of seawater and the constant pressure fluctuations inherent in marine environments.
Key Features & Technical Advantages:
- Robust Lug Design: The valve features a sturdy lug-type body with threaded inserts on both sides. This design allows it to be installed between two flanges using bolts, providing a secure connection that can handle pipeline end loads. It is ideal for end-of-line service or where the valve may need to be isolated.
- Superior Sealing Performance: Equipped with a high-quality elastomeric seat (standard EPDM for wide temperature range and excellent chemical resistance, NBR optional), the valve ensures bubble-tight shut-off, preventing leakage in the critical cooling water intake line.
- Corrosion-Resistant Construction: Key components like the disc are typically made from stainless steel (e.g., CF8/304, CF8M/316) to resist pitting and corrosion from saltwater. The body, available in cast iron with epoxy coating or ductile iron, offers strength and protection against marine atmospheric conditions.
- Efficient Flow Characteristics: The disc design minimizes pressure drop across the valve when fully open, ensuring maximum flow capacity for cooling water, which is crucial for maintaining optimal engine temperature.
- Versatile Actuation Options: The valve can be operated via a manual lever for quick quarter-turn operation, a gearbox for higher torque applications, or can be fitted with pneumatic/electric actuators for remote and automated control systems.
- Durable Stem Design: A one-piece or two-piece stainless steel stem provides excellent strength and corrosion resistance. It is securely sealed with O-rings or bushings to prevent media ingress into the operating mechanism.
Technical Specifications Table:
| Parameter | Specification |
|---|---|
| Nominal Size | DN400 (NPS 16") |
| Pressure Rating | PN10, PN16 (Class 150) Standard |
| Temperature Range | -10°C to +120°C (with EPDM seat) |
| Body Material | Cast Iron (GG25), Ductile Iron (GGG40), Coated |
| Disc Material | Stainless Steel CF8 (304), CF8M (316) |
| Seat Material | EPDM (Standard), NBR, Viton® (Optional) |
| Stem Material | Stainless Steel 304/316, 17-4PH |
| Connection Standard | ISO 5211 Flange (PN10/16), DIN, ANSI |
| Operation | Manual Lever, Worm Gear, Actuator Ready |
| Test Standards | Shell Test, Seat Leakage Test per API 598/EN 12266 |
Benefits for Your Marine Application:
- Enhanced System Reliability: Prevents cooling water supply interruptions, protecting the main engine from overheating and potential damage.
- Reduced Maintenance Downtime: The lug design simplifies valve replacement, minimizing vessel downtime during servicing.
- Long Service Life: Corrosion-resistant materials and robust construction ensure the valve performs reliably over extended periods in harsh marine conditions.
- Cost-Effective Operation: Low torque operation and minimal pressure drop contribute to energy efficiency in the pumping system.
- Flexibility: Available in various material combinations and actuation methods to suit specific project requirements and existing shipboard systems.
Shanghai Zhibang's commitment to quality is backed by our ISO9001 certification, ensuring every DN400 valve undergoes rigorous testing before shipment. Our extensive experience supplying to markets across North America, South America, Europe, Asia, Africa, and Oceania means we are adept at meeting diverse international standards and client specifications. We support our products with reliable logistics from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to shipyards and marine equipment suppliers globally. For a valve that combines marine-grade durability with operational efficiency for your cooling water intake lines, choose a trusted manufacturer. Contact us today to discuss your requirements, request a detailed quotation, or explore customization options for your specific vessel design.
Frequently Asked Questions (FAQ):
-
Q: Why is a lug-type butterfly valve preferred for ship cooling water intake lines over a wafer type?
A: Lug-type valves have threaded inserts (lugs) around the valve body. This allows them to be bolted between two flanges without nuts on the other side, making them suitable for end-of-line service. In a cooling water intake line, this design allows the valve to be isolated and removed for maintenance without needing to support the downstream piping, which is a significant practical advantage on ships. -
Q: What seat material do you recommend for seawater service?
A: For standard seawater cooling applications, EPDM (Ethylene Propylene Diene Monomer) is highly recommended. It offers excellent resistance to saltwater, ozone, and a wide temperature range. For specific chemicals or higher temperatures, alternative materials like NBR or Fluorocarbon (e.g., Viton®) can be provided upon request. -
Q: Can this valve be supplied with an actuator for automated control?
A: Yes, absolutely. The valve is designed to be "actuator ready." It typically comes with an ISO 5211 mounting pad, allowing for easy installation of pneumatic (double-acting or spring-return) or electric actuators. We can supply the complete actuated package as per your system requirements. -
Q: What are the standard coating or painting specifications for marine use?
A: Standard valves are often supplied with an epoxy coating (e.g., powder coating) suitable for marine atmospheres. For more demanding submerged or splash zone applications, we can offer high-performance coatings like hot-dip galvanizing or specific marine-grade paint systems. Specifications can be customized based on your technical data sheets. -
Q: What documentation is provided with the valve?
A> Standard documentation includes a Material Test Report (MTR) for critical components, a Certificate of Conformance (CoC), and operational manuals. Third-party inspection reports and specific type approval certificates (if required) can be arranged subject to prior agreement. -
Q: What is the lead time for a DN400 lug butterfly valve?
A: Lead time depends on the material specification, actuation choice, and order quantity. For standard configurations, we generally maintain a competitive production schedule. We provide accurate lead time estimates upon receipt of your detailed inquiry or purchase order. -
Q: Do you offer different disc designs (e.g., eccentric) for better sealing?
A: Yes. While a concentric design is common for resilient-seated valves, we can also provide double or triple eccentric (high-performance) designs for higher pressure ratings or applications requiring bi-directional shut-off with metal-to-metal seating. Please inquire for these specialized options. -
Q: How do you ensure the valve's compatibility with existing shipboard flange standards?
A> We manufacture valves to various international standards such as ISO, DIN, ANSI, and JIS. By providing details of your existing flange standards (facing, drilling template, pressure class), we can ensure the valve's lug dimensions and bolt holes are fully compatible for a seamless installation.
Send Inquiry to This Supplier
* Email
Want the best price?
Post an RFQ now!
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
You May Also Like
-
DN500 Triple Eccentric Marine Butterfly Valve With Fire-safe Design for Offshore PlatformsNegotiableMOQ: 1 Unit
-
316 Stainless Steel Triple Eccentric Hard Seal Butterfly Valve for High-pressure Marine ApplicationsNegotiableMOQ: 1 Unit
-
Triple Eccentric Marine Butterfly Valve With Metal Hard Seal for DN50 to DN1200 PipelinesNegotiableMOQ: 1 Unit
-
Triple Eccentric Hard Seal Butterfly Valve for Main Engine Cooling Water System BypassNegotiableMOQ: 1 Unit
-
Triple Eccentric Marine Butterfly Valve Supplied With Full Mill Test Report and 2-year WarrantyNegotiableMOQ: 1 Unit
-
Triple Eccentric Marine Butterfly Valve With PTFE-coated Disc for Corrosive Seawater SystemsNegotiableMOQ: 1 Unit
-
Triple Eccentric Hard Seal Butterfly Valve With On-site Technical Support for Marine Retrofit ProjectsNegotiableMOQ: 1 Unit
-
Marine Desulfurization Tower Butterfly Valve Engineered for Seawater-Scrubbed Flue Gas SystemsNegotiableMOQ: 1 Unit
-
High-Performance Marine Butterfly Valve for Desulfurization Towers, PN1.0-4.0MPa Pressure Rating, Corrosion ResistantNegotiableMOQ: 1 Unit
-
Marine-grade Triple Eccentric Butterfly Valve With Extended Stem for Deep Tank InstallationsNegotiableMOQ: 1 Unit
