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Help CenterLug Type Butterfly Valve Designed for Offshore Platform Piping, DN400 DN600
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As a leading valve manufacturer with a strong global presence, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our specialized Lug Type Butterfly Valve series engineered for the demanding environments of offshore platforms. With our ISO9001-certified manufacturing processes and a proven track record of supplying to markets worldwide, we understand the critical need for reliability, durability, and safety in marine applications. Our DN400 and DN600 lug butterfly valves are designed to meet these exacting standards, offering robust performance for seawater cooling, firefighting, ballast, and other essential piping systems on offshore installations. We combine advanced engineering with rigorous testing to deliver valves that ensure long-term operational integrity and minimal maintenance, helping you safeguard your assets and personnel.
This valve series stands out due to its specialized features tailored for offshore use. The lug-type design is a key advantage, allowing easy installation and removal from the pipeline without disturbing adjacent sections—a crucial feature for maintenance and repair in confined platform spaces. The valve body and components are constructed from corrosion-resistant materials to withstand harsh saline atmospheres and seawater exposure.
- Superior Corrosion Resistance: We offer body materials like ductile iron with epoxy coating or stainless steel (CF8/CF8M) to combat the corrosive offshore environment effectively.
- Bidirectional Sealing & Zero Leakage: The precision-engineered disc and resilient seat (EPDM/NBR for general service, PTFE for chemical resistance) ensure tight, bidirectional shut-off, preventing seawater ingress and system contamination.
- High-Strength Lug Design: The integral lugs are cast as part of the valve body, providing strong, threaded endpoints for bolting directly between pipeline flanges. This design handles high pipeline stresses and vibrations common on platforms.
- Low Torque Operation & Extended Service Life: The streamlined disc design and low-friction seat minimize operating torque, reducing wear on actuators and enabling smooth, reliable operation over thousands of cycles.
- Versatile Actuation Options: The valves are compatible with manual gear operators, electric actuators, or pneumatic actuators, allowing for integration into automated control systems for remote operation—a vital feature for unmanned or partially manned platforms.
- Fire-Safe Design (Optional): For critical services, a fire-safe design with metal secondary seals is available to maintain integrity in emergency situations.
The technical specifications of our offshore lug butterfly valves are detailed below to help you make an informed selection:
| Parameter | Specification |
|---|---|
| Size Range | DN400 (16"), DN600 (24") - Other sizes available upon request |
| Pressure Rating | PN10, PN16, PN25 (Class 150, Class 300) |
| Temperature Range | -10°C to +120°C (with EPDM seat), up to +200°C (with special seats) |
| End Connection | Lug, drilled to match ANSI B16.5 or EN 1092-2 flange standards |
| Body Materials | Ductile Iron (GGG40), Carbon Steel (WCB), Stainless Steel (CF8/CF8M) |
| Disc Materials | Ductile Iron (epoxy coated), Stainless Steel (304/316), Duplex Steel |
| Seat Materials | EPDM, NBR, Viton, PTFE, HNBR |
| Design & Test Standards | API 609, ISO 5752, ISO 10631; tested per API 598 |
Choosing our lug butterfly valve brings significant benefits to your offshore operations. The robust construction ensures reduced downtime and lower total cost of ownership by minimizing failures and the need for frequent replacements. The ease of installation and maintenance translates to faster project turnaround and safer working conditions for your crew. Furthermore, the valve's efficient flow characteristics contribute to energy savings in pump-driven systems. By selecting a valve designed specifically for offshore challenges, you invest in the long-term reliability and safety of your critical infrastructure.
Backed by Shanghai Zhibang Valve's commitment to quality since 2016, our products have earned trust across diverse markets from North America and Europe to Southeast Asia and Africa. Our annual export value reflects a consistent ability to meet the stringent demands of global clients. With ISO9001 certification governing our production, you can be confident in the consistency and reliability of every valve that leaves our facilities in Shanghai. We support seamless logistics through major ports like Shanghai, Guangzhou, and Hong Kong. For your next offshore project requiring dependable, high-performance DN400 or DN600 lug butterfly valves, partner with a proven manufacturer. Contact us today to discuss your specifications, request a detailed quote, or learn more about how our solutions can enhance the safety and efficiency of your platform's piping systems.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a lug-type butterfly valve over a wafer type for offshore platforms?
A: The lug-type design features threaded inserts (lugs) on the valve body. This allows the valve to be bolted directly between two pipeline flanges, serving as a permanent connection point. This is crucial offshore as it permits the isolation and removal of a single valve section without needing to support the entire pipeline, simplifying maintenance in tight spaces.
Q2: Can this valve handle seawater service effectively?
A: Yes, it is specifically engineered for such applications. We recommend material combinations like epoxy-coated ductile iron or stainless steel (316) body with an EPDM seat, which offer excellent resistance to corrosion and biological growth typical in seawater systems.
Q3: Are these valves suitable for high-pressure applications on platforms?
A: Our standard valves are rated for PN16/Class 150, suitable for most offshore piping services like cooling water. For higher-pressure duties (e.g., PN25/Class 300), we offer valves with reinforced design and materials. Please specify your pressure requirements when inquiring.
Q4: What actuation options are available?
A: The valves can be supplied with a manual hand lever, a geared handwheel for larger sizes, or automated with electric or pneumatic actuators. Actuator selection depends on your required torque, speed, and control system interface (on/off or modulating).
Q5: Do you provide fire-safe certified valves?
A: Yes, we offer a fire-safe design option. These valves include a secondary metal seat that engages if the primary resilient seat is compromised by fire, helping to prevent fluid release and maintain system integrity in emergency scenarios, which is often a requirement for offshore safety standards.
Q6: What is the typical lead time for DN400 or DN600 valves?
A: Lead time varies based on material specifications, actuation, and order quantity. For standard configurations, production typically takes 4-6 weeks. We recommend contacting our sales team with your detailed requirements for an accurate delivery schedule.
Q7: Can you customize the valve to meet specific project standards (e.g., NACE MR0175)?
A: Absolutely. As a manufacturer, we have the flexibility to customize materials, coatings, testing, and documentation. We can provide valves compliant with NACE, specific paint systems, or other client/regional specifications upon request.
Q8: What kind of testing is performed on these valves before shipment?
A: Every valve undergoes rigorous testing, including a hydrostatic shell test and a seat leakage test per API 598 or equivalent standards. Certified test reports are available and can be provided with the shipment to ensure quality assurance for your project.
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