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Help CenterShipbuilding Industry Gate Valve per CB/T3591-2005, DN50 to DN300 Sizes Available
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As a dedicated manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for demanding maritime applications. Our gate valves, engineered specifically for the shipbuilding industry in strict accordance with the CB/T3591-2005 standard, are designed to withstand the harsh conditions of marine environments. We understand the critical need for safety, durability, and zero leakage in shipboard systems, from ballast and bilge lines to fuel and cooling water services. With an annual export value reflecting our global reach and commitment to quality, we offer a range of DN50 to DN300 gate valves that combine proven design with modern manufacturing precision.
Our shipbuilding gate valves are engineered for long service life and minimal maintenance. The core design principle focuses on creating a tight seal and smooth operation even after prolonged periods of inactivity, a common scenario in marine valve applications.
- Rugged Construction for Marine Duty: Manufactured from materials selected for corrosion resistance and strength, such as cast steel, stainless steel, and bronze, these valves resist saltwater corrosion and mechanical stress. The body and bonnet are designed with sufficient wall thickness to handle system shocks and pressure surges common in ship piping.
- Standard-Compliant Design: Adherence to the CB/T3591-2005 standard ensures compatibility with Chinese shipbuilding specifications and provides a benchmark for dimensions, materials, pressure ratings, and testing protocols. This compliance offers peace of mind for shipyards and naval architects.
- Superior Sealing Performance: We offer both metal-to-metal and resilient seated designs. The metal-seated versions provide excellent high-temperature capability, while resilient seated valves (with inserts like EPDM or NBR) ensure bubble-tight shut-off at lower temperatures, crucial for freshwater and fuel oil services.
- Flexible Operation and Configuration: Valves are typically supplied with a handwheel for manual operation. For larger sizes or automated systems, options include gear operators or electric actuators, available upon request. The standard OS&Y (Outside Screw and Yoke) design provides a clear visual indication of the valve position (open or closed).
- Full-Bore Flow Design: The straight-through flow path when fully open offers minimal pressure drop, which is essential for efficient pumping systems and helps reduce operational energy costs over the vessel's lifetime.
Key technical specifications for our standard range are summarized below. Custom configurations outside these parameters can be discussed based on your project requirements.
| Parameter | Specification / Option |
|---|---|
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Pressure Rating (PN) | PN10, PN16, PN25 (Standard). Higher classes are customizable. |
| Face-to-Face Dimensions | As per CB/T3591-2005 & relevant flange standards (GB, ANSI, JIS) |
| Flange Standard & Rating | GB/T 9113 (Standard), ANSI B16.5, JIS B2220 available |
| Test Standards | Shell Test & Seat Leakage Test per CB/T3591-2005 & GB/T 13927 |
| Packing Material | Graphite, PTFE, or Flexible Graphite (standard) |
The primary advantage for our clients is reduced total cost of ownership. While the initial investment is competitive, the real value lies in the valve's longevity and reliability. Fewer replacements and repairs mean lower maintenance costs and less vessel downtime. Furthermore, our manufacturing process, underpinned by an ISO9001 quality management system, ensures consistent quality and traceability for every valve produced. This is particularly important for shipowners and shipyards that require documentation for classification society approvals. By choosing our valves, you integrate a component built for performance into your vessel's critical systems.
Our commitment to quality is demonstrated by our ISO9001 certification and a track record of supplying valves across diverse global markets, including North America, Europe, Southeast Asia, and Africa. With an annual export value between US$1 Million and US$1.5 Million, we have established ourselves as a reliable partner for international marine projects. We support this global supply chain with efficient logistics from major ports like Shanghai, Guangzhou, and Hong Kong. For your next shipbuilding or repair project, choose a valve supplier that combines standard compliance with manufacturing expertise. Contact Shanghai Zhibang Valve today to discuss your DN50 to DN300 gate valve requirements and receive a detailed quotation.
Frequently Asked Questions (FAQ)
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Q: Are these valves accepted by international ship classification societies?
A: While the valves are manufactured to the Chinese CB/T3591-2005 standard, which is widely recognized, final acceptance is subject to approval by the specific classification society (e.g., ABS, DNV, LR, BV) for your project. We can provide all necessary material certificates and test reports to support the approval process. -
Q: What is the main difference between metal-seated and resilient-seated gate valves for marine use?
A: Metal-seated valves are suitable for higher temperature services (e.g., steam, hot oil) and offer good abrasion resistance. Resilient-seated valves use an elastomer (rubber) insert on the wedge, providing superior shut-off (bubble-tight) for lower temperature liquids like seawater, potable water, or fuel oil, but have a lower temperature limit. -
Q: Can you provide valves with flanges matching ANSI or JIS standards?
A: Yes. Although the standard offering complies with GB flange dimensions, we can manufacture valves with ANSI B16.5 or JIS B2220 flanges upon request to ensure compatibility with your existing piping. -
Q: What is the typical delivery lead time for an order of DN150 valves?
A: Lead times vary based on order quantity, material specification, and configuration. For standard materials and configurations, typical production lead time is 4-6 weeks. We recommend contacting us with your specific requirements for an accurate schedule. -
Q: Do you offer actuated versions for remote operation?
A: Absolutely. We can equip our gate valves with electric, pneumatic, or hydraulic actuators. Please specify your required torque, voltage, control signal, and other parameters when inquiring. -
Q: How do you ensure protection against corrosion for valves used in seawater service?
A: For seawater applications, we typically recommend materials like bronze or stainless steel (CF8M/316). Additionally, we can apply protective coatings like epoxy paint on carbon steel bodies upon request. Proper material selection is key, which we can advise on based on the service fluid. -
Q: What documentation is provided with the valves?
A: Standard documentation includes a Material Test Certificate, Product Certificate of Conformity, hydrostatic test report, and a detailed packing list. Additional documents for classification can be arranged. -
Q: Are spare parts like packing, gaskets, and wedges available for future maintenance?
A: Yes, we maintain an inventory of critical spare parts and can supply them separately. We recommend purchasing a maintenance kit with your initial order for convenience.
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