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Home > Industrial Equipment & Components > Valve > Other Valves & Parts > DN400 Marine Lug Butterfly Valve Supplied With Mill Test Report and Warranty

DN400 Marine Lug Butterfly Valve Supplied With Mill Test Report and Warranty

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Product Spotlights

DN400 lug-style butterfly valve designed for marine and industrial use. Features robust construction for corrosion resistance, reliable bubble-tight sealing, and a lug body for easy installation/removal. Supplied with a Mill Test Report for full material traceability and backed by a manufacturer's warranty. Compatible with manual, gear, or automated actuation.

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

Key Specifications

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Size:

DN400

Type:

Lug Butterfly Valve

Application:

Marine and Industrial Fluid Systems

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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Size DN400

Type Lug Butterfly Valve

Application Marine and Industrial Fluid Systems

Body Material Optional (e.g., Ductile Iron, Stainless Steel)

Disc Material Optional (e.g., Stainless Steel)

Seat Material Optional (e.g., EPDM, NBR, PTFE)

Operation Manual, Gear, or Pneumatic Actuator

Connection Standard Lug type for easy installation/removal

Pressure Rating PN10, PN16, or Class 150

Documentation Supplied with Mill Test Report (MTR)

As a professional valve manufacturer with extensive experience in the global marine and industrial sectors, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance DN400 Marine Lug Butterfly Valve. Engineered for reliability in demanding environments, this valve is a cornerstone for fluid control systems requiring robust construction, dependable sealing, and straightforward maintenance. Each valve is supplied with a comprehensive Mill Test Report (MTR), providing full material traceability and quality assurance, and is backed by our company warranty, reflecting our confidence in its durability and performance.

This lug-style butterfly valve is specifically designed to meet the rigorous demands of marine applications, offshore platforms, and various industrial piping systems. Its lug-type body design allows it to be installed between two flanges without the need for nuts on the downstream side, making it an ideal choice for end-of-line services or systems where periodic removal is necessary. We combine precise manufacturing, stringent quality control under our ISO9001 certified processes, and a deep understanding of client needs to deliver a product that ensures long-term operational efficiency and safety.

Core Product Features & Technical Advantages:

Robust Lug Body Design: The lug-type body provides a secure connection, allowing the valve to be installed or removed from one side of the pipeline without disturbing the other. This is particularly advantageous for maintenance and system isolation in marine environments.
Superior Sealing Performance: Features a precision-machined disc and a resilient seat (options like EPDM, NBR, or PTFE) that ensures bubble-tight shut-off, minimizing leakage and ensuring system integrity for water, seawater, air, and other mild fluids.
Corrosion-Resistant Construction: Available in various material combinations such as ductile iron body with epoxy coating or full stainless steel (CF8/CF8M), offering excellent resistance to corrosion from seawater and harsh industrial atmospheres.
Low Torque Operation & Versatile Actuation: The streamlined disc design reduces operating torque. It can be paired with a manual lever, gear operator, or automated pneumatic/electric actuators based on operational requirements, enabling easy integration into control systems.
Full Material Traceability: Every valve is accompanied by a Mill Test Report (MTR), certifying the chemical composition and mechanical properties of the primary materials (body, disc, stem), providing essential documentation for quality audits and regulatory compliance in critical projects.
Compact & Lightweight: Compared to gate or globe valves of similar size, the butterfly valve design offers a significantly more compact profile and lower weight, saving space and simplifying support structure requirements on ships and platforms.

Key Technical Specifications:

Parameter	Specification
Nominal Diameter	DN400 (16")
Pressure Rating	PN10, PN16, Class 150 (Standard)
Connection Type	Lug Style, Drilled to Standard Flange Dimensions
Temperature Range	Depends on Seat Material (e.g., -10°C to 120°C for EPDM)
Operation	Manual Lever, Gear Box, or Actuator (Optional)
Standards	Design conforms to common international standards like ISO, API, AWWA

Benefits for Your Project:

Enhanced System Reliability: Reduces the risk of unexpected failure and downtime in critical marine cooling, ballast, firefighting, and general service lines.
Simplified Maintenance & Inventory: The lug design and interchangeable parts simplify maintenance procedures. Standardized dimensions ensure compatibility.
Cost-Effective Solution: Offers an optimal balance of performance, longevity, and initial investment, providing strong value over the valve's lifecycle.
Compliance & Documentation Ready: The included MTR supports your project's quality assurance protocols, making it suitable for shipbuilding, offshore, and regulated industrial applications.

With an established presence since 2016 and an annual export value reflecting our global reach across North America, South America, Europe, Asia, Africa, and Oceania, Shanghai Zhibang has built a reputation for delivering dependable valve solutions. Our products are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics. The DN400 Marine Lug Butterfly Valve embodies our commitment to quality, supported by our operational certification. It is more than just a component; it is a reliable partner for your fluid control challenges. Choose a valve backed by professional manufacturing, verifiable quality, and a commitment to customer satisfaction. Contact us today to discuss your specific requirements, request a detailed quotation, or learn more about our full product range.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a lug-style butterfly valve over a wafer-style?
A: The primary advantage is installation flexibility. A lug-style valve has threaded inserts (lugs) on both sides, allowing it to be bolted between two flanges without nuts on the downstream flange. This permits the valve to be installed at the end of a pipeline or easily removed for maintenance without dismantling the entire section.
Q: What fluids is this DN400 valve suitable for?
A: It is designed for a wide range of moderate fluids commonly found in marine and industrial settings, including fresh water, seawater, air, oils, and other non-aggressive chemicals. The specific seat material should be selected based on the fluid's chemical compatibility and temperature.
Q: Why is the Mill Test Report (MTR) important?
A: The MTR is a critical quality document from the material mill. It provides verifiable proof of the chemical and mechanical properties of the valve's main components (body, disc, stem). This is essential for quality assurance, regulatory compliance, material traceability, and safety audits in industries like shipbuilding and offshore engineering.
Q: Can this valve be automated?
A: Yes, absolutely. The valve is designed to be compatible with various actuators. It can be equipped with pneumatic (on/off or modulating) or electric actuators upon request. The standard manual lever or gear operator can also be easily replaced with an actuator in the field if needed.
Q: What pressure classes are available for the DN400 size?
A> Standard pressure ratings include PN10 and PN16 (metric) or Class 150 (imperial). Other pressure classes may be available as a custom order. Please specify your system's maximum working pressure when inquiring.
Q: What is the typical lead time for an order of these valves?
A: Lead time depends on the order quantity, material specifications, and actuator options. Standard configurations typically have a shorter lead time. We recommend contacting our sales team with your specific requirements for an accurate production and delivery schedule.
Q: Do you offer different seat materials, and how do I choose?
A: Yes, we offer various elastomer seats like EPDM (for water, steam), NBR (for oils, fuels), and PTFE (for chemicals, high temperatures). The choice depends on the fluid media, temperature range, and required chemical resistance. Our technical team can assist in the selection.
Q: What does the warranty cover?
A: Our warranty covers defects in materials and workmanship under normal use and service for a specified period from the date of shipment. The warranty terms are provided with the commercial documentation. Proper installation and use within specified parameters are required for the warranty to be valid.