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Help CenterMarine Sewage System Butterfly Valve DN50-DN300 Wafer Connection JIS F7481
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As a specialized manufacturer with a strong focus on marine fluid control solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. presents our high-performance Marine Sewage System Butterfly Valve series. Engineered to meet the rigorous demands of shipboard wastewater management, these valves are designed for reliable, low-maintenance operation in critical marine environments. Our commitment to quality, backed by ISO9001 certification, ensures that every valve delivers the durability and precise flow control required for efficient and compliant sewage handling onboard vessels.
This series of wafer-style butterfly valves is specifically constructed for marine sewage systems, adhering to the JIS F7481 standard. The compact wafer design allows for easy installation between flanges, saving valuable space and weight – crucial factors in marine applications. The valves are available in sizes from DN50 to DN300, providing a comprehensive solution for various pipeline diameters within a ship's sewage collection and transfer network. Key features include:
- Robust Construction: Built to withstand the corrosive nature of marine sewage and the challenging shipboard environment, including exposure to saltwater and variable pressures.
- Bubble-Tight Shut-off: The precision-engineered disc and resilient seat combination ensures a reliable seal, preventing leaks and backflow in the sewage system.
- Smooth 90-Degree Operation: The valve opens and closes with a simple quarter-turn, allowing for quick actuation and easy integration with automated control systems.
- Versatile Actuation Options: Available with manual levers, gear operators, or customizable electric and pneumatic actuators to suit different levels of automation and remote control needs.
- Low Pressure Drop: The disc design minimizes flow resistance when fully open, contributing to energy efficiency in pump-driven sewage systems.
The technical specifications and available configurations for our Marine Sewage Butterfly Valves are detailed below:
| Parameter | Details |
|---|---|
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Connection Standard | Wafer per JIS F7481 |
| Body Materials (Common Options) | Cast Iron (GG25), Ductile Iron, Stainless Steel (CF8/CF8M), Aluminum Bronze |
| Disc Materials (Common Options) | Stainless Steel (304, 316), Aluminum Bronze, Nickel-Plated |
| Seat Materials (Common Options) | EPDM, NBR, Viton, PTFE |
| Operation Types | Manual (Lever, Gear), Electric Actuator, Pneumatic Actuator |
| Temperature Range | Dependent on seat material (e.g., -20°C to +120°C for EPDM) |
| Face-to-Face Dimension | Compact, conforms to JIS F7481 standard for wafer valves |
Choosing our valves brings distinct advantages to shipbuilders, repair yards, and system integrators. The JIS F7481 compliance guarantees compatibility with a wide range of marine piping systems, particularly in Asian markets. The wafer connection significantly reduces installation time and cost compared to lug-style or flanged valves. Furthermore, the availability of corrosion-resistant material combinations extends service life and reduces maintenance intervals, lowering the total cost of ownership. Our valves contribute to system reliability, helping vessels meet stringent environmental regulations for sewage discharge by ensuring contained and controlled flow.
With an annual export value ranging between US$1 Million and US$1.5 Million and a presence in major global markets including North America, Europe, Southeast Asia, and Africa, Shanghai Zhibang has established itself as a trusted partner for marine valve solutions. Our products are shipped from key ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient logistics. Our ISO9001-certified manufacturing process is a testament to our consistent quality control. For a robust, compliant, and space-saving solution for your marine sewage system, our JIS F7481 wafer butterfly valves offer proven performance. Contact us today to discuss your specific DN50-DN300 requirements and receive a tailored quotation.
Frequently Asked Questions (FAQ):
Q1: What is the main advantage of a wafer-style connection over a lug-style butterfly valve for marine sewage?
A: The wafer design is lighter, more compact, and installed between two pipeline flanges using through-bolts. This saves space and weight, which are premium considerations onboard ships. Lug-style valves have their own bolt holes and can be used as pipe ends, but are generally heavier.
Q2: Can these valves be used with media other than sewage?
A: While designed for sewage, the valve's material construction (e.g., stainless steel body with Viton seat) can make it suitable for other shipboard fluids like seawater, ballast water, or certain chemicals. Please consult with our engineers for your specific media.
Q3: Are electric or pneumatic actuators available for remote operation?
A: Yes. We offer a range of actuation options. Manual valves can be fitted with electric or pneumatic actuators for integration into automated control panels, which is common in modern vessel design.
Q4: How does compliance with JIS F7481 benefit international buyers?
A: JIS (Japanese Industrial Standards) are widely recognized and respected in the global marine industry, particularly in Asia. Compliance ensures dimensional standardization, facilitating easier sourcing of compatible flanges and gaskets, and is often specified by shipyards and classification societies.
Q5: What is the typical lead time for an order of DN150 valves?
A: Lead times vary based on material specifications, actuation type, and order quantity. Standard configurations often have shorter lead times. We provide accurate delivery estimates upon receipt of your detailed inquiry.
Q6: Do you provide documentation like test certificates or material reports?
A: Yes, we can provide standard documentation, including product data sheets and certificates of conformity. Specific test reports (e.g., pressure tests) or material certificates (3.1 or 3.2) are available upon request.
Q7: What maintenance do these butterfly valves require?
A: They are designed for low maintenance. Periodic visual inspection of the external components and occasional operation to prevent seizing are recommended. The resilient seat is wear-resistant, but if leakage occurs, the seat and seal can often be replaced without removing the valve body from the line.
Q8: Are these valves suitable for both new builds and retrofit projects?
A: Absolutely. Their compact wafer design makes them an excellent choice for retrofitting existing piping systems where space is limited, in addition to being ideal for new construction.
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