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As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve is proud to present our specialized Marine Butterfly Valve, Lug Type, featuring a robust Reinforced Nylon Handle. Engineered for demanding marine environments, this valve combines reliable performance with user-friendly manual operation. Our commitment to precision manufacturing since 2016 ensures every valve meets the stringent requirements of shipbuilding and offshore applications, providing a dependable solution for fluid control on vessels worldwide.
This lug-type butterfly valve is designed for versatility and durability. The lug-style body allows for easy installation between two flanges without needing nuts on both sides, simplifying maintenance and replacement. The standout feature is the high-strength reinforced nylon handle, which offers excellent resistance to corrosion, UV degradation, and impact—common challenges in marine settings. The handle is ergonomically designed for smooth 90-degree operation, providing clear visual indication of the valve position (open/closed).
Key Technical Specifications & Design Advantages:
- Superior Corrosion Resistance: The reinforced nylon handle is inherently non-corrosive, making it ideal for saltwater exposure. Unlike metal handles, it will not rust, pit, or degrade, ensuring long-term operational reliability and safety.
- Rugged Construction: The valve body is typically crafted from ductile iron with epoxy coating or other marine-grade materials upon request. The disc is stainless steel, providing a strong, corrosion-resistant closure element.
- Bubble-Tight Shut-Off: Features a resilient seat (standard EPDM for fresh/wastewater, NBR for oils) that ensures a reliable, bubble-tight seal, preventing leakage in critical marine piping systems.
- Easy Maintenance & Installation: The lug design permits the valve to be installed using bolts that pass through the lugs, securing it between two flanges. This design allows either side of the pipeline to be disconnected without affecting the other, perfect for system isolation.
- Low Torque Operation: The optimized disc and seat design, combined with the ergonomic handle, requires minimal operating torque. This reduces operator fatigue and allows for quick, easy opening and closing even after prolonged periods.
Typical Material Configuration & Performance Data:
| Component | Standard Material | Key Property |
|---|---|---|
| Body | Ductile Iron (Epoxy Coated) | High strength, corrosion-resistant coating |
| Disc | Stainless Steel 304/316 | Excellent corrosion resistance, durability |
| Stem | Stainless Steel 304/316 | High tensile strength, corrosion resistance |
| Seat | EPDM / NBR | Resilient seal, wide temperature range |
| Handle | Reinforced Nylon (Fiberglass) | Lightweight, non-conductive, corrosion-proof |
Application Benefits for Marine Clients: This valve is specifically suited for seawater cooling lines, ballast systems, firefighting lines, bilge pumping, tank venting, and general service lines on ships, oil rigs, and port facilities. Its robust build ensures minimal downtime, while the non-conductive handle enhances operator safety in electrical environments. The simple design leads to lower lifetime costs through easy maintenance and part replacement.
With an annual export value reflecting our global reach, Shanghai Zhibang Valve has established trust across markets from North America and Europe to Southeast Asia and Africa. Our valves are shipped from major ports like Shanghai and Guangzhou, ensuring timely delivery. The ISO9001 certification underpins our consistent quality. For shipyards, marine equipment suppliers, and vessel operators, this Marine Butterfly Valve represents a reliable, cost-effective choice that stands up to the harsh ocean environment. Contact us today to discuss your specific requirements and benefit from our manufacturing expertise.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of a lug-type butterfly valve over a wafer type for marine use?
A: The lug-type design has threaded inserts (lugs) on the valve body. This allows it to be bolted directly between two flanges without needing long bolts through both flanges. A key benefit for marine systems is that you can disconnect one side of the pipeline for maintenance without the valve falling out, providing better isolation capabilities. -
Q: Why is a reinforced nylon handle preferred for marine valves?
A: Reinforced nylon is highly resistant to saltwater corrosion, UV rays, and chemicals commonly found on ships. It is also lightweight, non-conductive (safer near electrical equipment), and provides good mechanical strength and impact resistance, ensuring the handle remains functional and safe in tough conditions. -
Q: Can this valve be used for both on/off service and flow regulation?
A: While primarily designed for reliable on/off isolation, the quarter-turn operation allows for some basic flow throttling. For precise flow control applications, we recommend consulting with our engineers, as other trim options may be more suitable. -
Q: What are the standard pressure and temperature ratings?
A: Standard ratings are PN10 (150 psi) and PN16 (232 psi). The temperature range is typically -10°C to 120°C with a standard EPDM seat. Ratings for higher pressures or temperatures are available with different material configurations. -
Q: Is the valve suitable for seawater applications?
A: Yes, with the standard stainless steel disc/stem and epoxy-coated ductile iron body, it is well-suited for seawater. For highly aggressive or continuous seawater immersion, materials like 316 stainless steel or special coatings can be specified. -
Q: How do I know what seat material to choose?
A: The choice depends on the fluid media. EPDM is standard for water (fresh, sea, waste). NBR is common for oils and fuels. Other materials like Viton are available for specific chemicals. Please provide your media details for a recommendation. -
Q: Are locking devices available for the handle?
A: Yes, locking devices or padlock provisions for the handle are often available as an option to secure the valve in a specific position (open or closed) for safety or procedural compliance. -
Q: What is your lead time and packaging for export?
A: Standard models typically have shorter lead times. Valves are export-packed in wooden cases or pallets to prevent damage during ocean freight. Specific lead times and packaging details can be provided based on order quantity and destination.
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