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Help CenterManual Gear Marine Ball Valve CB/T3191 DN100 PN4.0MPa Flanged Connection
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Welcome to Shanghai Zhibang Valve Manufacture Co., Ltd., a professional valve manufacturer with a strong commitment to quality and reliability since 2016. We specialize in producing robust and dependable valves for demanding industrial and marine applications. Our Manual Gear Marine Ball Valve, manufactured in strict accordance with the CB/T3191 standard, is engineered for superior performance in high-pressure marine piping systems. This valve combines a durable flanged connection with a reliable manual gear operator, offering precise flow control and long-term service life in critical environments.
This DN100, PN4.0MPa valve is a cornerstone for shipbuilders, offshore platform operators, and marine engineers who require a valve that can withstand harsh conditions. The integration of a manual gearbox provides significant mechanical advantage, making the operation of this large-diameter, high-pressure ball valve smooth and manageable, even under full differential pressure. We understand the importance of every component on a vessel, and this valve is built to contribute to the overall safety and efficiency of your fluid handling systems.
Key Features and Technical Specifications:
- Rugged Construction: The valve body and key components are typically crafted from high-grade carbon steel or optional stainless steel, providing excellent resistance to corrosion and mechanical stress in marine atmospheres.
- Manual Gear Operation: The enclosed gear operator ensures easy and safe 90-degree rotation for opening and closing. It reduces the required operating torque dramatically, allowing for manual control of high-pressure lines without the need for powered actuators.
- Superior Sealing Performance: Features advanced seat designs, often utilizing PTFE or reinforced polymeric materials, ensuring a bubble-tight seal and minimal leakage, which is critical for environmental protection and system integrity onboard.
- Full Port Design (Optional): Available in full port configuration to minimize pressure drop across the valve, ensuring efficient flow with virtually no restriction, which is ideal for pumping systems.
- Flanged Connection: The flanged ends (DN100) are machined to precise standards, ensuring a perfect, leak-free fit with corresponding pipeline flanges, simplifying installation and maintenance.
- High-Pressure Capability: Rated for PN4.0 MPa (approximately 580 psi), this valve is suitable for a wide range of high-pressure services including seawater cooling, fuel oil, lubricating oil, and compressed air systems.
Detailed Technical Parameters:
| Parameter | Specification |
| Product Standard | CB/T3191 |
| Nominal Diameter (DN) | 100 mm |
| Pressure Rating (PN) | 4.0 MPa |
| Connection Type | Flanged |
| Operation Mode | Manual with Gearbox |
| Body Material | Carbon Steel (WCB) / Stainless Steel (CF8/CF8M) |
| Seat Material | PTFE, Reinforced PTFE, or Metal |
| Temperature Range | -20°C to +200°C (varies with seat material) |
| Flow Characteristic | Quick Opening |
Advantages and Customer Benefits:
- Enhanced Operational Safety: The gear operator provides a clear visual indication of valve position (open/closed) and prevents accidental operation, enhancing onboard safety protocols.
- Reduced Maintenance Costs: Built with durable materials and a simple, robust design, this valve requires minimal maintenance. The sealed gearbox protects internal components from harsh marine elements.
- Reliability in Critical Systems: Its high-pressure rating and tight sealing make it a reliable choice for essential ship systems where failure is not an option, contributing to vessel uptime.
- Ease of Installation and Compatibility: Standard flanged dimensions ensure easy integration into existing or new piping systems, reducing installation time and labor costs.
Shanghai Zhibang Valve backs its products with a solid foundation. Our manufacturing processes are certified under the ISO9001 Quality Management System, ensuring consistent quality from raw material to finished product. With an annual export value ranging between US$1 Million and US$1.5 Million, we have established trust with partners across the globe, including key markets in North America, South America, Eastern Europe, Southeast Asia, Africa, and Oceania. We ship efficiently from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to your project site. Choosing our Manual Gear Marine Ball Valve means selecting a component backed by professional manufacturing expertise, international quality standards, and a proven track record of global supply. It is a strategic investment in the reliability and safety of your marine operations.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of a gear-operated ball valve over a standard hand lever?
A: A gear operator provides a significant mechanical advantage, reducing the input torque required to open or close the valve. This is essential for larger diameter valves (like DN100) and higher pressure classes (PN4.0MPa), making manual operation feasible, safer, and less strenuous. -
Q: Is this valve suitable for seawater service?
A: Yes, when ordered with appropriate material specifications. We recommend stainless steel (such as CF8M/316) body and trim for superior corrosion resistance in seawater applications. The seat material can also be specified for compatibility. -
Q: Can this valve be used for on/off duty only, or is it suitable for throttling?
A: Ball valves are primarily designed for reliable on/off service. While slight throttling is possible, it is not recommended for precise flow control as it can cause premature wear of the ball and seat, especially with high pressure. For throttling, other valve types are more suitable. -
Q: What flange standard does this valve comply with?
A: The valve is manufactured to the Chinese CB/T3191 standard, which typically aligns with common international flange face dimensions and drilling patterns (like ANSI/ASME or JIS). It is advisable to confirm the specific flange standard (e.g., ANSI 150#) required for your project at the time of inquiry to ensure compatibility. -
Q: What maintenance does the gear operator require?
A: The gearbox is typically sealed and lubricated for life. Under normal operating conditions, it requires no routine maintenance. Periodic visual inspection for external damage and ensuring the sealing surfaces are clean is generally sufficient. -
Q: Do you offer different end connections besides flanged?
A: This specific model is designed as a flanged ball valve. However, as a manufacturer, we can produce ball valves with other end connections such as threaded or welded ends. Please contact us to discuss custom requirements. -
Q: What is the lead time for an order of this valve?
A: Lead time depends on order quantity, specific material selection, and current production schedule. For standard configurations in carbon steel, we often have shorter lead times. We provide accurate lead time estimates upon receipt of your detailed inquiry. -
Q: Are spare parts like seals or gears available?
A: Yes. As the original manufacturer, we maintain an inventory of critical spare parts for our valves, including seal kits and gearbox components. Providing spare parts ensures the long-term operability of your valves.
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