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Help CenterGB/T Marine Gate Valve DNV LR Approved Carbon Steel DN50 DN150 PN6.4MPa
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As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our high-performance GB/T Marine Gate Valve. Designed for demanding marine and offshore applications, this valve meets stringent international standards including DNV LR approval, ensuring reliability and safety in critical fluid control systems. With a robust carbon steel construction and a pressure rating of PN6.4MPa, it is engineered to withstand harsh operational environments.
Key Features & Technical Specifications:
- Robust Construction: Manufactured from high-grade carbon steel, offering excellent strength, durability, and resistance to corrosion in marine atmospheres.
- Stringent Approvals: Compliant with GB/T standards and holds prestigious DNV LR approval, a critical requirement for global maritime projects.
- Wide Size Range: Available in nominal diameters from DN50 to DN150, providing flexibility for various pipeline configurations.
- High-Pressure Capability: Rated for PN6.4MPa (approximately 928 psi), suitable for high-pressure seawater, ballast, fuel oil, and other shipboard services.
- Reliable Sealing: Features a metal-to-metal seated design, ensuring a tight shut-off and long service life even with abrasive media.
- Standard Operation: Equipped with a handwheel for manual operation, designed for ergonomic use and precise control.
- Flanged Connection: Standard RF (Raised Face) flanged ends ensure easy, secure, and leak-proof installation into existing piping systems.
Technical Parameter Table:
| Parameter | Specification |
|---|---|
| Product Type | Marine Gate Valve |
| Design Standard | GB/T |
| Approval | DNV LR Approved |
| Body Material | Carbon Steel (WCB or equivalent) |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150 |
| Pressure Rating | PN6.4MPa (Class 400) |
| Seat & Disc Material | Stainless Steel or equivalent |
| Stem Material | Stainless Steel |
| Connection Type | Flanged, RF |
| Operation | Handwheel (Gear Operation Optional) |
| Temperature Range | Standard: -20°C to +425°C (Customizable) |
| Packing | Graphite-based for high-temperature service |
Advantages & Client Benefits:
- Enhanced Safety & Compliance: The DNV LR approval provides assurance of quality and compliance with rigorous marine industry regulations, facilitating smoother project approvals and vessel classification.
- Durability & Low Maintenance: The carbon steel body and metal-seated design minimize wear and tear, reducing maintenance frequency and total cost of ownership.
- Global Market Acceptance: Meeting GB/T and DNV standards makes this valve suitable for shipyards and marine operators worldwide, including our main markets across North America, Europe, Asia, Africa, and Oceania.
- Reliable Supply Chain: As an established manufacturer since 2016 with an annual export value of US$1-1.5 million, we ensure consistent product quality, on-time delivery from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, and professional technical support.
Choosing Shanghai Zhibang's Marine Gate Valve means investing in a component backed by ISO9001-certified manufacturing processes and proven performance in global marine applications. Our commitment to quality and understanding of diverse market requirements from Eastern Europe to Southeast Asia ensures you receive a product that meets both technical specifications and commercial expectations. For detailed quotations, specific material certifications, or to discuss custom requirements, please contact our sales team. We are ready to support your next marine project with reliable valve solutions.
Frequently Asked Questions (FAQ):
Q1: What does "DNV LR Approved" mean for this valve?
A1: DNV LR (Det Norske Veritas and Lloyd's Register) approval signifies that the valve has been designed, manufactured, and tested according to the stringent rules and standards set by these leading marine classification societies. This certification is often mandatory for valves used on classified vessels and offshore installations, ensuring safety and reliability.
Q2: Can this gate valve be used for services other than seawater?
A2: Yes. While designed for marine environments, its carbon steel construction and PN6.4MPa rating make it suitable for various shipboard fluids such as fuel oil, lubricating oil, compressed air, and ballast water, provided the fluid compatibility is verified.
Q3: Are the flanges dimensions standard?
A3: Yes, the flanges conform to international standards such as ISO, ANSI, or JIS. Specific flange standards (e.g., ANSI B16.5, JIS B2220) can be specified upon request to match your existing piping.
Q4: Is an alternative operation method available besides the handwheel?
A4: Absolutely. While handwheel operation is standard, we can provide gear-operated actuators (bevel or worm gear) for larger sizes or valves in hard-to-reach locations. Electric or pneumatic actuation is also available as an option.
Q5: What documentation comes with the valve?
A5: Each valve typically comes with a material certificate, pressure test certificate, and DNV LR approval certificate (if applicable). A detailed inspection report and operational manual are also provided.
Q6: What is the lead time for an order of DN100 valves?
A6: Lead time depends on order quantity and specific requirements. For standard DN100 valves, production time is generally 4-6 weeks. We maintain efficient logistics from our Shanghai base and major Chinese ports to ensure timely delivery worldwide.
Q7: Do you offer different material options for the valve trim?
A7: Yes. While standard trim is stainless steel, other materials like Monel, Hastelloy, or 13% Cr can be offered for enhanced corrosion resistance in specific applications. This is customizable upon request.
Q8: How do I ensure I order the correct valve for my pressure and temperature conditions?
A8: Please provide the specific service conditions (fluid, pressure, temperature) and any relevant standards your project requires. Our technical team will recommend the most suitable configuration, including material grade and pressure-temperature rating validation.
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