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Help CenterShipboard Seawater Pipeline Wafer Butterfly Valve, Manufactured to GB/T3036 Standard, Lever Operated
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As a dedicated manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for demanding maritime applications. Our Shipboard Seawater Pipeline Wafer Butterfly Valve, manufactured to the stringent GB/T3036 standard, is engineered to withstand the harsh, corrosive environment of seawater systems on vessels. With an annual export value reflecting our global reach, we understand the critical need for valves that offer dependable performance, ease of operation, and minimal maintenance, ensuring the smooth operation of your ship's vital cooling and ballast systems. This lever-operated valve represents our commitment to quality, durability, and meeting the specific needs of the marine industry worldwide.
This valve is designed as a compact and efficient shut-off or regulating device for seawater pipelines onboard ships, platforms, and other marine structures. Its wafer-style design allows for easy installation between flanges, saving space and weight – crucial factors in marine engineering. The lever operation provides quick and visual indication of the valve position (open or closed), which is essential for routine operations and safety checks. Manufactured in compliance with GB/T3036, it ensures dimensional interchangeability and performance reliability expected in Chinese national standards for marine valves.
Key Features and Technical Advantages:
- Corrosion-Resistant Construction: Critical components like the disc and stem are typically made from stainless steel (e.g., 304, 316) or with protective coatings to resist pitting and corrosion from saltwater, significantly extending service life.
- Robust Seat Design: The valve features a resilient seat, commonly made from EPDM or NBR, which ensures a bubble-tight seal in both directions, preventing seawater leakage and ingress.
- Low Torque Operation: The optimized disc design and high-quality bearings minimize operating torque, making the lever easy to actuate even after prolonged periods, reducing operator fatigue.
- Bi-Directional Sealing: Engineered to provide effective sealing regardless of flow direction, which is vital for systems where flow might reverse.
- Compact & Lightweight: The wafer design offers a significant advantage over lug or flanged valves by reducing overall weight and envelope size, contributing to better vessel weight management.
- Minimal Pressure Drop: When fully open, the disc presents minimal obstruction to flow, ensuring efficient system performance and reducing pump energy requirements.
Technical Specifications Table:
| Specification | Details |
| Valve Type | Wafer Butterfly Valve |
| Operation Type | Lever Operated |
| Design Standard | GB/T3036 |
| Connection Type | Wafer (Between Flanges) |
| Nominal Pressure (PN) | PN10, PN16, PN25 |
| Nominal Diameter (DN) | DN50 to DN600 (2" to 24") |
| Body Material | Ductile Iron (QT450), Cast Iron (HT250), Stainless Steel (CF8/CF8M) |
| Disc Material | Stainless Steel 304/316, Nickel Plated Ductile Iron |
| Stem Material | Stainless Steel 420/304/316 |
| Seat Material | EPDM (Standard), NBR, Viton (FKM) - options available |
| Temperature Range (with EPDM seat) | -10°C to 120°C |
| Applicable Medium | Seawater, Fresh Water, Sea Water with Sand |
| Flow Characteristic | Approximately Equal Percentage |
| Leakage Class | Zero Leakage (Soft Seat) |
Benefits for Your Marine Operations:
- Enhanced System Reliability: Reduces the risk of unexpected failure in critical cooling, firefighting, or ballast systems, minimizing vessel downtime.
- Reduced Maintenance Costs: Corrosion-resistant materials and durable seat design lead to longer maintenance intervals and lower lifecycle costs.
- Operational Safety & Simplicity: The clear lever position indicator allows for immediate visual confirmation, enhancing operational safety and preventing errors.
- Global Supply Chain Support: With major shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely delivery to shipyards and ports worldwide, including our key markets across North America, Europe, Asia, and Africa.
Our commitment to quality is underpinned by our ISO9001 certification, which governs our entire manufacturing process from material sourcing to final testing. This systematic approach to quality control, combined with nearly a decade of industry experience since 2016, ensures that every Shipboard Seawater Butterfly Valve leaving our facility meets consistent performance standards. Trusted by clients across six continents, from Eastern Europe to Oceania, our valves are proven in diverse marine environments. We invite you to experience the reliability and value that Shanghai Zhibang brings to your maritime projects. Contact us today to discuss your specific requirements, request a detailed quotation, or learn more about our full range of marine valve solutions.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a wafer-type design over lug or flanged types for shipboard use?
A: The wafer design is significantly lighter and more compact. It installs between two pipeline flanges using through-bolts, saving crucial space and weight on a vessel, which directly impacts fuel efficiency and payload capacity.
Q2: Is this valve suitable for both fresh and seawater applications?
A: Yes, it is specifically designed for seawater but is equally effective for fresh water. The key is specifying the appropriate disc and body material (e.g., stainless steel 316 for highly corrosive seawater) to ensure longevity.
Q3: Can the valve be used for throttling or flow control, or is it only for on/off service?
A: While the lever-operated version is primarily intended for on/off service, the disc design allows for some degree of flow regulation. For precise throttling control, a gear operator or an actuated version is recommended.
Q4: What does compliance with GB/T3036 standard mean for international buyers?
A: GB/T3036 is a Chinese national standard for marine flanged butterfly valves. It specifies dimensions, materials, pressure ratings, and testing requirements, ensuring product reliability and often ensuring compatibility with international flange standards like DIN or ANSI, depending on the specification.
Q5: What are the available seat material options and their differences?
A: Standard seat is EPDM, suitable for water within -10°C to 120°C. NBR offers better oil resistance. Viton (FKM) is for higher temperatures (up to 150°C) and more aggressive chemicals. The choice depends on your specific service medium and temperature.
Q6: How do I know which material grade (e.g., 304 vs 316 stainless steel) to choose for the disc?
A: For standard seawater service, 316 stainless steel is highly recommended due to its superior resistance to chloride-induced pitting and crevice corrosion compared to 304. For less demanding or brackish water, 304 may be sufficient and more cost-effective.
Q7: Is the lever position lockable?
A: The standard lever can be padlocked in the fully open or fully closed position using a standard padlock through the holes provided on the lever and the body stop, which is a useful safety feature.
Q8: What is your typical lead time and packaging for export?
A: Lead times vary based on size, material, and quantity. Standard configurations are often available from stock. For export, valves are typically packaged in wooden crates or plywood boxes with proper internal cushioning to prevent damage during ocean freight.
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