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Help CenterMarine Wafer Duo-Eccentric Butterfly Valve, 150 LB ANSI Class, No Actuator
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As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve specializes in providing robust and reliable fluid control solutions for demanding marine applications. Our Marine Wafer Duo-Eccentric Butterfly Valve is engineered to deliver superior performance, longevity, and ease of maintenance in corrosive saltwater environments and high-pressure shipboard systems. This valve represents our commitment to combining advanced design with manufacturing excellence, offering a cost-effective and dependable sealing solution for shipbuilders, shipyards, and offshore operators worldwide.
This valve features a duo-eccentric (double-offset) design, which significantly reduces seat wear and extends service life compared to concentric butterfly valves. The unique offset geometry ensures that the disc only contacts the seat in the final few degrees of closure, minimizing friction and torque. Key characteristics include:
- Superior Sealing Performance: The duo-eccentric mechanism provides bubble-tight shut-off, even after prolonged cycling, making it ideal for critical isolation applications.
- Reduced Operating Torque: Lower friction translates to easier manual operation with levers or gearboxes, reducing operator effort.
- Enhanced Durability: Constructed from marine-grade materials to resist corrosion from seawater, bilge water, and other harsh fluids.
- Bi-Directional Flow: Designed to seal effectively against pressure from either direction, simplifying installation and system design.
- Compact & Lightweight Wafer Design: The wafer style body fits between ANSI flanges, saving considerable space and weight compared to lug-style valves, a crucial advantage in marine construction.
- Easy Maintenance: Seat replacement can often be performed without removing the valve body from the pipeline, drastically cutting downtime.
Technical specifications for standard configurations are detailed below. Please note that material combinations, sizes, and specific seat types can be customized upon request to meet your exact project requirements.
| Parameter | Specification / Option |
|---|---|
| Design Standard | API 609, MSS SP-67 |
| Pressure Rating | 150 LB ANSI Class |
| Temperature Range | -20°C to +150°C (dependent on seat material) |
| Body Materials | Ductile Iron (standard), WCB Cast Steel, CF8/CF8M Stainless Steel |
| Disc Materials | Stainless Steel 316, Nickel Plated Carbon Steel, Epoxy Coated |
| Seat Materials | PTFE (standard), EPDM, NBR, Viton |
| Operation | Manual Lever (standard), Worm Gear Operator (optional) |
| Face-to-Face | Per API 609 / ANSI B16.10 |
| Flange Connection | Raised Face (RF) per ANSI B16.5 |
The primary benefits for your marine projects are substantial. You gain a valve with extended maintenance intervals due to reduced seat wear, leading to lower lifecycle costs. The compact wafer design optimizes space in crowded engine rooms and piping systems. Furthermore, the availability of corrosion-resistant materials ensures long-term reliability in challenging marine atmospheres, protecting your assets and operations.
Backed by our ISO9001 certification and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang Valve guarantees consistent quality and performance. Our products are trusted across global markets, from North America and Europe to Southeast Asia and Oceania, with an annual export value demonstrating our international reach and reliability. We support shipments from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing for efficient logistics. Choosing our Marine Wafer Duo-Eccentric Butterfly Valve means selecting a component engineered for durability, backed by a professional manufacturer committed to meeting the stringent demands of the marine industry. Contact us today to discuss your specifications or request a detailed quotation.
Frequently Asked Questions (FAQ)
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Q: What is the main advantage of a duo-eccentric design over a standard concentric butterfly valve?
A: The duo-eccentric (double-offset) design drastically reduces friction between the disc and seat during operation. This leads to lower operating torque, significantly less seat wear, and a longer service life, which is critical for frequently cycled valves in marine systems. -
Q: Can this valve be used for both isolation and throttling service?
A: While primarily designed for reliable isolation and shut-off, the duo-eccentric design offers improved flow control characteristics over concentric valves. However, for precise throttling applications, it is recommended to consult with our engineers for specific advice based on your media and flow parameters. -
Q: Is the valve suitable for seawater service?
A: Yes, when specified with appropriate materials. We offer body options like stainless steel (CF8M/316) and disc coatings (nickel plating, epoxy) specifically to combat corrosion from seawater, bilge water, and other saline fluids common in marine environments. -
Q: The product title states "No Actuator." Can an actuator be added later?
A: Absolutely. This valve is supplied as a manual unit (lever or gear), but the stem design is compatible with various pneumatic or electric actuators. We can provide the valve prepared for actuator mounting or supply a complete actuated package upon request. -
Q: How does the wafer-style connection work with ANSI flanges?
A: The valve body fits between two ANSI flanges. Longer bolts pass through both flanges and the valve body, clamping it securely in place. This creates a compact, lightweight, and cost-effective connection compared to lug-style valves, which have threaded inserts. -
Q: What is the typical delivery time for a custom size or material?
A: Standard sizes and materials typically have shorter lead times. For custom requirements, lead times vary based on complexity and order volume. We prioritize clear communication and provide accurate production schedules upon order confirmation to ensure timely project integration. -
Q: Do you provide pressure test certificates and material documentation?
A> Yes, as an ISO9001 certified manufacturer, we perform hydrostatic shell tests and seat leakage tests according to relevant standards (e.g., API 598). Certified test reports and material certificates (MTC) are available and can be supplied with the shipment. -
Q: What after-sales support do you offer?
A: We provide comprehensive technical support, including installation guidance, maintenance manuals, and assistance with spare parts identification. Our goal is to ensure the valve performs optimally throughout its entire lifecycle in your application.
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