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Help CenterCB/T466-1995 Cast Steel Gate Valve for Bilge and Ballast Systems on Vessels
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As a specialized manufacturer of industrial valves, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our CB/T466-1995 compliant Cast Steel Gate Valve, engineered specifically for the demanding environments of marine bilge and ballast systems. With our ISO9001 certified manufacturing processes and a decade of experience since our establishment in 2016, we deliver valves that meet the rigorous standards of the global maritime industry. This valve is designed to provide reliable, long-lasting performance in critical shipboard applications, ensuring the safe and efficient operation of your vessel's essential fluid handling systems. We understand the critical nature of these components, which is why we focus on robust construction, precise engineering, and thorough testing to guarantee performance under pressure.
Our CB/T466-1995 Cast Steel Gate Valve is a cornerstone component for managing seawater and wastewater on vessels. Its primary function is to provide a tight seal for complete shut-off in bilge and ballast piping, crucial for stability, safety, and environmental protection. The valve features a rising stem, outside screw and yoke (OS&Y) design, which is ideal for marine applications as it allows for clear visual indication of the valve's open or closed position and keeps the threaded stem away from the corrosive fluid flow. The body and bonnet are constructed from high-grade cast steel, offering excellent strength and corrosion resistance against seawater. The wedge or gate is precision-machined and often faced with stainless steel or other alloys to ensure a bubble-tight seal and resist wear from frequent operation and abrasive particles sometimes present in bilge water. Sealing is further enhanced by flexible graphite or reinforced PTFE packing around the stem, providing a reliable seal that is adjustable and can withstand high temperatures.
Key Technical Features and Advantages:
- Robust Construction: Manufactured from ASTM A216 WCB or equivalent cast steel, providing superior tensile strength and impact resistance for high-pressure shipboard systems.
- Corrosion-Resistant Trim: Critical internal parts (seat, wedge/stem) are often made from 13% Cr stainless steel or other alloys to combat the corrosive effects of seawater and bilge fluids, significantly extending service life.
- Reliable Sealing Mechanism: The parallel or wedge-shaped gate design ensures a uniform, metal-to-metal or resilient-seated seal, preventing leakage in both directions—a vital feature for ballast system integrity.
- Easy Operation and Maintenance: The outside screw and yoke design allows for easy lubrication of the stem threads and simple packing adjustment or replacement without removing the valve from the line, minimizing downtime.
- Standard Compliance: Strictly manufactured according to the Chinese Ship Standard CB/T466-1995, ensuring dimensional interchangeability, material suitability, and performance criteria are met for marine use.
- Versatile Pressure Handling: Available in a range of pressure classes (PN10 to PN40) to suit various system design pressures on different types of vessels, from cargo ships to offshore platforms.
Technical Specifications Table:
| Parameter | Specification |
|---|---|
| Product Standard | CB/T466-1995 (Shipbuilding Industry Standard of China) |
| Body & Bonnet Material | Carbon Steel (WCB), Cast Steel, other grades available |
| Seat & Wedge Material | 13% Cr Stainless Steel, Alloy Steel, Stainless Steel 304/316 |
| Stem Material | Stainless Steel 410, 304, or 17-4PH |
| Packing Material | Flexible Graphite, Reinforced PTFE, Asbestos-free |
| Nominal Diameter (DN) | 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500 |
| Pressure Rating (PN) | 10, 16, 25, 40 |
| Test Standards | Shell Test, Seat Test per CB/T466-1995 |
| Operation | Handwheel, Gear Operator (for large sizes) |
| Flange Standard | GB/T 2501 (Chinese Marine Standard), ANSI, JIS, DIN optional |
Benefits for Your Marine Operations:
- Enhanced Vessel Safety: Reliable isolation of bilge and ballast compartments is fundamental to ship stability and emergency response. Our valve's proven sealing performance contributes directly to operational safety.
- Reduced Lifecycle Cost: The use of corrosion-resistant materials and robust design minimizes the frequency of repairs and replacements, leading to lower total cost of ownership over the vessel's lifespan.
- Global Supply Compatibility: With annual exports reaching US$1-1.5 Million and serving markets from North America and Western Europe to Southeast Asia and Africa, our valves are trusted by shipyards and fleets worldwide. Ports of shipment like Shanghai, Guangzhou, and Hongkong ensure efficient logistics.
- Simplified Inventory & Maintenance: Adherence to the CB/T466-1995 standard ensures parts interchangeability with other compliant valves, simplifying your spare parts strategy and making maintenance procedures more straightforward for your crew.
Choosing Shanghai Zhibang's CB/T466-1995 Cast Steel Gate Valve means investing in a component backed by a certified quality management system (ISO9001) and a manufacturer with a proven track record in the international maritime sector. Our products are not just commodities; they are engineered solutions that have been tested and trusted across diverse marine environments, from the cold waters of Northern Europe to the tropical seas of Southeast Asia. We are committed to providing valves that deliver uncompromising performance where it matters most. For your next vessel build, retrofit, or maintenance project, partner with a supplier that understands marine standards and global supply chain demands. Contact us today to discuss your specifications, request a detailed quote, or learn more about our full range of marine valves.
Frequently Asked Questions (FAQ):
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Q: What does the "CB/T466-1995" designation mean for this valve?
A: CB/T466-1995 is a Chinese national professional standard ("CB" stands for Shipbuilding) that specifies the technical requirements, testing methods, and acceptance criteria for cast steel gate valves used in marine piping systems. Valves marked with this standard are designed and manufactured specifically to meet the material, pressure, and corrosion resistance needs of ships. -
Q: Can this valve be used with fluids other than seawater in bilge/ballast systems?
A: While designed for seawater service, the material construction (e.g., cast steel body with stainless steel trim) makes it suitable for a range of other non-aggressive fluids like oily water, fresh water, and air within its specified pressure and temperature ratings. Always confirm fluid compatibility for specific chemical media. -
Q: Are the flanges compatible with international standards like ANSI or DIN?
A> Our standard offering complies with the GB/T 2501 marine flange standard common in shipbuilding. However, we can manufacture valves with flanges to other major standards such as ANSI B16.5, DIN, or JIS upon request to suit your specific piping system design. -
Q: What is the lead time for an order of these valves?
A: Lead time varies based on order quantity, size, and material specifications. Standard configurations in common sizes may have shorter lead times. We recommend contacting our sales team with your specific requirements for an accurate production and delivery schedule. -
Q: Do you offer valves with different operation methods besides a handwheel?
A: Yes. For larger valve sizes (typically DN300 and above) where manual operation requires high torque, we offer options for bevel gear operators or electric actuators. These can be specified at the time of order to facilitate easier operation. -
Q: What kind of testing and certification do you provide with the valves?
A> Each valve undergoes rigorous factory testing, including hydrostatic shell tests and seat leak tests, in accordance with CB/T466-1995 requirements. A standard test certificate is provided. Additional certifications, such as a material test report (MTR), can be supplied upon request. -
Q: How do I determine the correct pressure rating (PN) for my application?
A: The required pressure class depends on the maximum working pressure in your specific bilge or ballast system piping design. Common ratings are PN16 and PN25. Our technical team can assist you in selecting the appropriate rating based on your system parameters. -
Q: What are your main packaging methods for export to prevent damage during sea freight?
A: We use robust export-standard packaging. Valves are typically cleaned, dried, internal parts protected with anti-rust VCI, openings sealed with plastic caps, and securely packed in wooden crates or plywood boxes suitable for long-distance ocean transport and handling.
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