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Help CenterOEM Marine Butterfly Valve Built to JIS F7481, Available in Wafer and Lug Body Types
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As a specialized manufacturer of industrial valves, Shanghai Zhibang Valve Manufacture Co., Ltd. leverages our expertise in precision engineering and quality control to present our OEM Marine Butterfly Valve. Built strictly to the JIS F7481 standard and available in both wafer and lug body configurations, this valve is engineered for the demanding requirements of marine applications. Our commitment to reliability, backed by ISO9001 certified processes, ensures that every valve meets the rigorous standards of the global shipbuilding and offshore industries. We understand the critical need for durable, corrosion-resistant, and easy-to-maintain components in marine systems, and our butterfly valves are designed to deliver long-lasting performance in seawater, ballast, cooling, and other shipboard piping services.
Our OEM Marine Butterfly Valve is a versatile and robust solution for controlling flow in various marine piping systems. The key to its performance lies in its design and construction, tailored to withstand the harsh marine environment.
- JIS F7481 Compliance: The valve is meticulously designed and manufactured to comply with the Japanese Industrial Standard JIS F7481 for marine butterfly valves. This ensures dimensional interchangeability, specified pressure ratings, and material requirements suitable for marine use, providing peace of mind for shipbuilders and repair yards worldwide.
- Dual Body Type Options: We offer two primary body types to suit different installation needs. The Wafer Type is designed to be installed between two pipe flanges using through-bolts, making it a compact and economical choice. The Lug Type features threaded inserts (lugs) on the valve body, allowing it to be installed using bolts into these lugs. This design permits the downstream side to be disconnected for maintenance without affecting the upstream connection, a valuable feature for system isolation.
- Superior Material Selection: To combat corrosion from saltwater and marine atmospheres, we use high-grade materials. The valve body and disc are typically constructed from ductile iron with epoxy coating or stainless steel (CF8/CF8M). The seat is made from resilient materials like NBR (Nitrile Butadiene Rubber) or EPDM, ensuring a tight seal and good chemical resistance against seawater and oils.
- Robust Design Features: The valve incorporates a one-piece stem-disc assembly for enhanced strength and reduced potential leakage paths. The stem is sealed with multiple O-rings or stuffing box packing. The disc design is optimized for low torque operation and minimal pressure drop across the valve.
- Multiple Actuation Methods: To fit various operational requirements, the valve can be supplied with different operators. Standard models come with a manual lever for quick on/off operation. For larger sizes or higher pressure applications, a gear operator is available to reduce required handwheel torque. For automated systems, the valve can be easily fitted with electric, pneumatic, or hydraulic actuators upon request.
To provide a clear overview of our standard specifications, please refer to the table below. Customizations are available for specific project requirements.
| Parameter | Specification |
|---|---|
| Design Standard | JIS F7481 |
| Body Types | Wafer, Lug |
| Size Range (Nominal Diameter) | DN50 (2") to DN600 (24") |
| Pressure Rating (JIS 10K/16K/20K) | PN10, PN16, PN20 (Common) |
| Body & Disc Material | Ductile Iron (Epoxy Coated), CF8/CF8M Stainless Steel |
| Seat Material | NBR, EPDM (Optional: Viton, PTFE) |
| Stem Material | Stainless Steel (SS420, SS304, SS316) |
| Operation | Manual Lever, Gear Operator, Actuator (Optional) |
| Temperature Range | -10°C to +120°C (Depending on seat material) |
The advantages of choosing our OEM Marine Butterfly Valve translate directly into benefits for your projects. You gain a reliable and standardized component that simplifies procurement and ensures compatibility. The corrosion-resistant construction extends service life and reduces maintenance costs in saltwater environments. The availability of both wafer and lug designs offers installation flexibility to optimize your piping layout and maintenance procedures. Furthermore, as an OEM manufacturer, we provide the flexibility for custom branding, packaging, and minor specification adjustments to meet your specific supply chain needs.
With nearly a decade of manufacturing experience since our establishment in 2016 and a proven track record evidenced by our annual export value, Shanghai Zhibang Valve has built trust across diverse markets from North America and Europe to Southeast Asia and Africa. Our ISO9001 certification is a testament to our unwavering commitment to systematic quality management throughout the production process. Sourced directly from our factory in Shanghai, you receive a competitively priced product without compromising on quality or compliance. Our valves are shipped efficiently from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery to support your project schedules. For your next marine valve requirement, choose a partner dedicated to precision and reliability. Contact us today to discuss your OEM specifications or to request a detailed quotation.
Frequently Asked Questions (FAQ):
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Q: What is the main difference between the wafer and lug body types for this marine butterfly valve?
A: The wafer type is installed between two flanges using long bolts that pass through both flanges and the valve. It's compact and cost-effective. The lug type has threaded inserts (lugs) on the valve body, allowing it to be bolted directly to each flange separately. This permits the disconnection of one side of the pipeline for maintenance or inspection without disturbing the other side. -
Q: Why is compliance with JIS F7481 important for a marine valve?
A: JIS F7481 is a widely recognized Japanese Industrial Standard specifically for marine butterfly valves. Compliance ensures the valve meets defined criteria for dimensions, pressure-temperature ratings, materials, and testing. This standardization guarantees interchangeability, reliability, and suitability for the demanding conditions of marine applications, which is often a requirement in international shipbuilding and repair contracts. -
Q: Can this valve be used with media other than seawater?
A: Yes. While designed for marine environments, the valve's corrosion-resistant materials (like epoxy-coated ductile iron or stainless steel) and resilient seats (like NBR or EPDM) make it suitable for a range of fluids including fresh water, chilled water, air, and certain oils. The specific seat material should be selected based on chemical compatibility with the intended media. -
Q: What actuator options are compatible with this valve for automated control?
A: The valve is designed with a standardized mounting pad according to common industry standards (like ISO 5211), making it compatible with a wide range of electric, pneumatic, and hydraulic actuators. We can supply the valve as a manual unit ready for actuator mounting, or we can provide a complete actuated assembly based on your torque, speed, and control signal requirements. -
Q: What is the typical lead time for an OEM order?
A: Lead time depends on the order quantity, specification complexity, and current production schedule. For standard specifications in moderate quantities, the lead time is generally competitive. We provide estimated lead times upon receipt of your detailed inquiry and work closely with clients to meet project deadlines. -
Q: Do you provide documentation and certifications with the valves?
A: Yes. Standard documentation includes a material test report (MTR) or certificate of conformity. For specific projects, additional testing or certification can be discussed and arranged. As a company, we hold ISO9001 certification for our quality management system. -
Q: How do you ensure the valve's corrosion resistance for long-term marine use?
A> We employ several methods: using inherently corrosion-resistant materials like stainless steel; applying high-quality epoxy powder coating to ductile iron bodies with proper surface preparation; and selecting stem and fastener materials (like stainless steel) suitable for the service environment. The specific protection method is chosen based on the application and client preference. -
Q: What is your minimum order quantity (MOQ) for OEM business?
A> Our MOQ policy is flexible and varies depending on the product specification and customization level. We welcome discussions for both trial orders and large-volume contracts. Please contact our sales team with your specific needs for a tailored proposal.
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