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Help CenterSeawater Gate Valve CB/T467 Standard - Bronze Construction Flanged Connection Pressure Rated PN4.0MPa
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As a specialized manufacturer with a focus on marine and industrial valves, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Seawater Gate Valve manufactured strictly in accordance with the CB/T467 standard. Engineered for demanding marine applications, this valve combines the superior corrosion resistance of bronze construction with a robust flanged connection, ensuring reliable isolation and control in seawater pipeline systems. Our commitment to the ISO9001 quality management system underpins every stage of production, from material selection to final testing, guaranteeing a product that meets the stringent requirements of shipbuilding, offshore platforms, and coastal facilities worldwide. This PN4.0MPa rated valve is designed to deliver long-term, maintenance-free performance in the harshest saline environments.
This gate valve is specifically engineered to handle the unique challenges posed by seawater, which is highly corrosive and often contains abrasive particulates. The choice of high-grade bronze alloy is critical, offering excellent resistance to saltwater corrosion, dezincification, and impingement attack. The flanged connection provides a secure, leak-proof joint that is easy to install and maintain within complex piping networks. The rising stem design offers a clear visual indication of the valve's open or closed position, a vital safety feature in marine engineering.
Key Product Features & Technical Advantages:
- Superior Corrosion Resistance: The bronze body, bonnet, and trim are specifically selected for seawater service, significantly outperforming standard brass or iron valves in longevity.
- Robust Pressure Containment: With a pressure rating of PN4.0MPa (approximately 580 psi), the valve is built to withstand high-pressure surges common in shipboard cooling, ballast, and firefighting systems.
- Bubble-Tight Shut-off: The precision-machined wedge disc and seat ensure a reliable, bubble-tight seal in both flow directions, preventing costly seawater ingress or system contamination.
- Low Operating Torque: The streamlined flow path and anti-galling bronze-on-bronze seating surfaces require lower operating torque, reducing wear on the stem and easing manual operation.
- Durable Stem Design: The stainless steel stem is resistant to corrosion and galling, ensuring smooth operation over thousands of cycles. A backseat feature allows for repacking under pressure.
- Standard Compliance: Manufactured to the Chinese Ship Standard CB/T467, ensuring compatibility and acceptance in shipbuilding and repair yards globally.
Detailed Technical Specifications:
| Parameter | Specification |
| Product Standard | CB/T467 (Marine Flanged Bronze Gate Valve) |
| Pressure-Temperature Rating | PN4.0MPa, Max 200°C |
| Body & Bonnet Material | ASTM B584 C95800 (Nickel-Aluminum Bronze) or equivalent |
| Disc & Seat Material | Bronze Alloy |
| Stem Material | Stainless Steel (SS304 or SS316) |
| Gasket Material | Graphite or PTFE (Standard) |
| Flange Standard | GB/T 2501, ANSI B16.5 Class 150/300, or JIS B2220 |
| Test Standards | Shell Test: 1.5 x PN; Seat Test: 1.1 x PN |
Benefits for Your Operations:
- Extended Service Life: Minimizes replacement frequency and downtime in corrosive seawater systems, lowering total cost of ownership.
- Enhanced System Safety: Reliable shut-off protects sensitive equipment from seawater damage and ensures operational safety on vessels and platforms.
- Global Project Compatibility: The CB/T467 standard and common flange dimensions facilitate integration into both new builds and retrofit projects worldwide.
- Reduced Maintenance: The robust design and corrosion-resistant materials lead to fewer operational issues and simpler, less frequent maintenance intervals.
With an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang has established a strong reputation for reliability across diverse markets including North America, Europe, Southeast Asia, and the Middle East. Our products are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics to your project site. The trust of our global clientele is built on a foundation of consistent quality, verified by our ISO9001 certification. Choosing our Seawater Gate Valve means selecting a component engineered for durability and performance, backed by a manufacturer with proven export expertise. Contact us today to discuss your specific requirements, request detailed quotations, or learn more about our full range of marine valves designed for critical applications.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of using bronze for seawater valves instead of cast iron or ductile iron?
A: Bronze alloys, particularly those with nickel and aluminum, offer far superior resistance to corrosion, dezincification, and erosion caused by flowing seawater. Iron-based materials would corrode rapidly, leading to premature failure and potential contamination. -
Q: Is this valve suitable for both submerged (overboard) and in-board seawater piping?
A: Yes. The valve is designed for general seawater service within piping systems. For continuous submerged service, specific material grades and additional protections can be discussed as optional configurations. -
Q: Can you provide valves with flanges matching ANSI or JIS standards, not just GB standards?
A: Absolutely. While manufactured to CB/T467, we routinely produce valves with flange dimensions and drilling to match ANSI B16.5, JIS B2220, or other international standards upon request to ensure perfect fitment in your existing pipeline. -
Q: What is the typical lead time for an order of these valves?
A: Lead times vary based on size, quantity, and specific configuration. Standard sizes are often available from stock or have shorter production cycles. We provide accurate lead time estimates with every quotation. -
Q: Does the PN4.0MPa rating apply to both cold working pressure and the pressure at elevated temperatures?
A: The PN rating is the nominal pressure at room temperature. The valve's pressure capability decreases at higher temperatures. The detailed pressure-temperature chart is available upon request for engineering review. -
Q: Are spare parts like gaskets and packing readily available?
A: Yes. We maintain an inventory of common spare parts and can supply maintenance kits. The valve design uses standardized components to facilitate easy maintenance and part sourcing. -
Q: How is the valve tested before shipment?
A: Every valve undergoes rigorous individual testing, including a hydrostatic shell test at 1.5 times PN and a seat leakage test at 1.1 times PN. Certified test reports can be provided as part of the documentation package. -
Q: Can this gate valve be fitted with an electric or pneumatic actuator for remote operation?
A: Yes. The standard handwheel-operated design can be adapted to accommodate various electric or pneumatic actuators. We can offer actuated solutions as a complete package.
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