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Marine Butterfly Valve Factory Supplying Standard-Compliant Valves With Mill Test Reports
Product Spotlights
Marine-grade butterfly valves built for corrosion resistance in seawater applications. Available in wafer and lug designs (DN50-DN1200) with materials like coated ductile iron or stainless steel. Compliant with ANSI/DIN/JIS standards and backed by verifiable Mill Test Reports (MTR) for quality assurance. Suitable for shipbuilding, offshore, and industrial systems, with manual, pneumatic, or electric actuation options. Supported by ISO9001-certified manufacturing and global export expertise.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Ductile Iron, Cast Steel, Stainless Steel
Operation Type:
Lug Type, Wafer Type
Connection Standard:
ANSI, DIN, JIS, GB
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Ductile Iron, Cast Steel, Stainless Steel
Operation Type
Lug Type, Wafer Type
Connection Standard
ANSI, DIN, JIS, GB
Seat Material
EPDM, NBR, PTFE
Disc Material
Ductile Iron with Nylon Coating
Size Range
DN50 to DN1200 (2“ to 48“)
Pressure Rating
PN10, PN16, Class 150
Application
Marine, Offshore, Shipbuilding, Water Treatment
Certification
ISO9001 Quality Management System
Test Report
Mill Test Report (MTR) Available
As a leading manufacturer with a strong foundation since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our comprehensive range of Marine Butterfly Valves. Engineered for demanding maritime and industrial applications, our valves are synonymous with reliability, durability, and strict adherence to international standards. We understand that in sectors like shipbuilding, offshore platforms, and marine engineering, equipment failure is not an option. That's why every valve we produce is built to withstand harsh environments, including seawater, variable temperatures, and high-pressure flows, ensuring uninterrupted operation and safety. Our commitment extends beyond manufacturing; we provide complete documentation, including Mill Test Reports, to give you full traceability and peace of mind for your critical projects.
Core Features and Technical Advantages:
- Robust Construction for Marine Duty: Our butterfly valves are specifically designed for marine applications. The body and disc are constructed from high-grade materials like ductile iron with epoxy coating or stainless steel (316/316L) to offer superior corrosion resistance against saltwater, chemicals, and atmospheric exposure. This significantly extends the valve's service life and reduces maintenance costs in corrosive environments.
- Precision Engineering and Leak-Tight Sealing: The valve features a precision-machined disc that rotates 90 degrees for quick on/off or throttling control. The seat is made from resilient materials like EPDM or PTFE, ensuring a bubble-tight seal even after prolonged use. This design minimizes pressure drop and provides efficient flow control for various fluids, including seawater, ballast water, fuel, and lubricants.
- Versatile Design and Configurations: We offer valves in both Wafer and Lug body designs to suit different piping system requirements. Wafer-style valves are compact and economical, installed between two pipe flanges. Lug-style valves have threaded inserts, allowing them to be installed at the end of a pipeline or between flanges without additional nuts, which is beneficial for end-of-line service or system isolation.
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Multiple Actuation Options: To meet diverse operational needs, our valves can be fitted with various actuators:
- Manual Operation: Lever, gearbox, or handwheel for simple, direct control.
- Pneumatic Actuation: Double-acting or spring-return actuators for automated, remote operation.
- Electric Actuation: Motorized actuators for integration into complex control systems.
- Compliance and Documentation: A cornerstone of our offering is full compliance with recognized international standards such as ANSI, DIN, JIS, and GB. More importantly, we provide a Mill Test Report (MTR) with each valve or batch. This report, traceable to the raw material heat number, details the chemical composition and mechanical properties, providing verifiable proof of material quality and manufacturing integrity—a critical requirement for classification society approvals and project specifications.
Key Technical Specifications:
| Parameter | Specification |
|---|---|
| Size Range | DN50 (2") to DN1200 (48") |
| Pressure Rating | PN10, PN16, ANSI Class 150 |
| Body Material | Ductile Iron (Epoxy Coated), Cast Steel, CF8/CF8M Stainless Steel |
| Disc Material | Ductile Iron (Nylon Coated), Stainless Steel, Aluminum Bronze |
| Seat Material | EPDM, NBR, Viton, PTFE |
| Temperature Range | -10°C to +120°C (depending on seat material) |
| Operation | 90° Rotation, On/Off or Modulating Control |
Benefits for Your Operations:
- Enhanced System Reliability: The durable construction and reliable sealing minimize the risk of leaks and failures, crucial for maintaining vessel safety and operational continuity.
- Reduced Lifecycle Costs: Corrosion-resistant materials and low-maintenance design lead to fewer replacements and lower total cost of ownership.
- Streamlined Procurement & Compliance: Readily available Mill Test Reports simplify the documentation process for audits, surveys, and compliance with ship classification rules (e.g., ABS, DNV, LR, BV).
- Global Supply Chain Support: With annual export values between US$1-1.5 Million and major shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we have the logistics expertise to deliver reliably to your key markets across North and South America, Europe, Asia, Africa, and Oceania.
Our operational backbone is the ISO9001 Quality Management System, which governs every step from material sourcing to final inspection. This systematic approach, combined with nearly a decade of manufacturing experience since 2016, ensures consistent product quality that global partners can depend on. We have successfully supplied valves to diverse and demanding markets worldwide, proving our capability to meet varied technical and commercial requirements. When you choose our Marine Butterfly Valves, you are not just buying a component; you are investing in a proven solution backed by verifiable quality documentation and a manufacturer dedicated to supporting your project's success. Contact us today to discuss your specifications, request a sample MTR, or get a detailed quote for your next maritime or industrial application.
Frequently Asked Questions (FAQ)
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Q: What is the main advantage of a lug-style butterfly valve over a wafer-style for marine use?
A: Lug-style valves have threaded inserts (lugs) on the valve body. This allows them to be bolted directly to a single flange, making them suitable for end-of-line service or for isolating a section of piping without needing nuts on both sides. This can be advantageous for certain maintenance or system configuration scenarios on ships. -
Q: Can your valves be used for both on/off and flow control (throttling) applications?
A: Yes, our butterfly valves are designed for reliable on/off service. With the appropriate disc design and actuator (like a modulating pneumatic or electric actuator), they can also be used for precise flow control or throttling in systems like cooling water or fuel lines. -
Q: What does the Mill Test Report (MTR) include, and why is it important?
A: The MTR is a certificate from the material mill that provides the chemical analysis and mechanical properties (like tensile strength, yield strength) of the metal used for the valve body and disc. It is crucial for quality traceability, verifying material grade compliance, and is often a mandatory document for approval by marine classification societies and for major projects. -
Q: Are your valves suitable for seawater and ballast water systems?
A: Absolutely. We offer specific material combinations, such as ductile iron with a high-performance epoxy coating or 316 stainless steel for the body/disc, paired with EPDM or similar seats, which provide excellent resistance to corrosion from seawater and are commonly used in ballast, bilge, and seawater cooling systems. -
Q: Do you offer customized valves for non-standard pressure ratings or sizes?
A: As a manufacturer, we have the capability to develop valves according to specific customer requirements. While we stock standard sizes and ratings, modifications to dimensions, pressure classes, or materials can be discussed and engineered based on your project's needs. -
Q: What types of end connections do you provide?
A> Our valves are manufactured to suit various international flange standards. Common connections include ANSI B16.5, DIN, JIS, and GB flanges. The specific flange facing (e.g., RF, FF) and drilling pattern can be specified to match your existing piping. -
Q: How do I select the right seat material for my application?
A: Seat material selection depends on the fluid media, temperature, and pressure. EPDM is versatile for water and mild chemicals up to 120°C. NBR is suitable for oils and fuels. PTFE offers a wide chemical resistance and temperature range. Our technical team can assist you in selecting the optimal material based on your service conditions. -
Q: What is your typical lead time for standard valve orders?
A: Lead times vary based on the order quantity, size, and material specifications. For standard configurations in our regular inventory, we can often arrange shipment promptly. We provide accurate lead time estimates upon receipt of your detailed inquiry to ensure proper planning for your project timeline.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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