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Help CenterReduced Bore Design CB/T3191 Marine Ball Valve for Fuel Oil Transfer Lines
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As a leading manufacturer with a strong commitment to maritime fluid control, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our specialized Reduced Bore Design CB/T3191 Marine Ball Valve. Engineered specifically for demanding fuel oil transfer lines, this valve combines robust construction with precise engineering to ensure reliable, leak-free operation in critical marine applications. With our ISO9001-certified manufacturing processes and a focus on export-quality products, we deliver valves that meet the stringent requirements of shipbuilders, shipyards, and offshore operators worldwide. Our dedication to quality, backed by an annual export value exceeding US$1 million, ensures you receive a component built for performance and longevity.
This marine-grade ball valve is designed to excel in the challenging environment of fuel oil handling. Its reduced bore (or reduced port) design is a key feature, offering significant advantages over full bore valves in specific applications.
- Optimized Flow & Pressure Control: The reduced bore design creates a venturi effect, which increases fluid velocity and helps maintain a stable pressure profile within the pipeline. This is particularly beneficial for fuel oil transfer, where consistent pressure can prevent issues like cavitation and ensure efficient pumping.
- Compact & Lightweight Construction: Compared to full bore valves of the same pressure class, the reduced bore design allows for a more compact and lighter valve body. This translates to easier installation, reduced structural support requirements, and overall weight savings on the vessel—a critical factor in marine design.
- Enhanced Shut-off Capability: The smaller ball and seat contact area can sometimes allow for higher sealing pressures, contributing to a more reliable bubble-tight shut-off, which is paramount for safety in fuel systems.
- Cost-Effective Solution: By using less material in the body and a smaller ball, reduced bore valves often present a more economical choice for applications where the full pipe cross-sectional area is not required for flow, such as in many fuel oil transfer lines.
The valve is manufactured in strict compliance with the Chinese CB/T3191 standard, which outlines the technical requirements for marine flanged steel ball valves, ensuring compatibility and reliability within marine piping systems.
| Parameter | Specification / Option |
|---|---|
| Design Standard | CB/T3191 |
| Bore Type | Reduced Bore (Typically one size smaller than nominal pipe size) |
| Pressure Ratings | Class 150, Class 300, PN16, PN25, PN40 |
| Size Range (Nominal) | DN15 (1/2") to DN600 (24") |
| Body Material (Common) | WCB (Carbon Steel), CF8/CF8M (Stainless Steel 304/316), Duplex Steel |
| Ball Material | Typically chrome-plated or coated based on body material for corrosion resistance. |
| Seat & Seal Material | PTFE, Reinforced PTFE (RPTFE), Metal Seated (for high-temp) |
| End Connection | Flanged (RF, RTJ), Threaded (NPT, BSPT, BSPP) |
| Operation | Lever, Worm Gear, Pneumatic Actuator, Electric Actuator |
| Fire Safe Design | Available upon request (API 607/API 6FA, ISO 10497) |
| Leakage Class | Class VI (Soft Seated), Class IV (Metal Seated) per ANSI/FCI 70-2 |
For ship owners and operators, the primary benefit is uncompromised reliability. Fuel oil is a critical and hazardous fluid; a valve failure can lead to operational downtime, environmental hazards, and significant safety risks. Our valve's robust design, quality materials, and adherence to the marine-specific CB/T3191 standard mitigate these risks. The reduced bore design offers a practical balance of performance and economy, providing excellent shut-off and flow control without the unnecessary cost and weight of a full-port valve. Furthermore, the availability of various actuation methods (manual, gear, pneumatic, electric) allows for seamless integration into both local control panels and centralized automated ship management systems.
Shanghai Zhibang Valve is not just a supplier; we are a manufacturing partner with a proven global track record. Since our establishment in 2016, we have successfully served markets across North America, South America, Europe, Southeast Asia, Africa, and Oceania, demonstrating our product's adaptability to diverse regional standards and operating conditions. Our ISO9001 certification is a testament to our systematic approach to quality control at every production stage. We support your projects with flexible logistics, shipping from major ports like Shanghai, Guangzhou, and Hong Kong. When you choose our Reduced Bore Marine Ball Valve, you are choosing a component backed by manufacturing expertise, international quality assurance, and a commitment to supporting the global maritime industry with dependable fluid control solutions. Contact us today to discuss your specific requirements and receive a competitive quotation.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between a reduced bore and a full bore ball valve?
A: A reduced bore valve has a ball and flow passage that is smaller than the connecting pipe's internal diameter, which increases flow velocity and reduces valve weight/size. A full bore valve has a flow passage equal to the pipe ID, minimizing pressure drop. The reduced bore is often preferred for fuel oil lines where full flow area isn't critical and cost/weight savings are desired.
Q2: Is this valve suitable for heavy fuel oil (HFO) service?
A: Yes, it is designed for fuel oil transfer. Material selection is key. For HFO, which may have higher viscosity and temperature, we often recommend specific seat materials like reinforced PTFE or metal seats and appropriate body/trim materials like stainless steel to handle the service conditions effectively.
Q3: Can this valve be supplied with actuators for remote operation?
A: Absolutely. We offer a range of actuation options. Pneumatic and electric actuators can be fitted based on your system's available power source and control signals, enabling integration into automated shipboard systems.
Q4: Does compliance with CB/T3191 make it acceptable for international shipbuilding projects?
A: The CB/T3191 is a recognized Chinese standard for marine valves. While many international projects may reference ISO, DIN, or ANSI/API standards, CB/T3191-compliant valves are widely accepted, especially in Asian shipbuilding and by global operators. We can also discuss manufacturing to other standards if required for your project.
Q5: What are the typical lead times for these valves?
A: Lead times vary based on size, material, and quantity. Standard configurations in common sizes may have shorter lead times. For large, customized, or actuated orders, we provide a specific production schedule upon quotation. Our efficient supply chain allows for timely delivery.
Q6: Do you provide fire-safe certified versions?
A: Fire-safe design is a critical option for fuel service. We can provide valves designed to meet fire-safe test standards such as API 607, API 6FA, or ISO 10497 upon request. Please specify this requirement during inquiry.
Q7: What kind of testing is performed before shipment?
A> Each valve undergoes routine inspections and tests, which typically include hydrostatic shell and seat tests, as well as operational tests (cycling). Certified test reports can be provided as part of the documentation package.
Q8: Can you provide valves with different flange standards (e.g., JIS, DIN)?
A: Yes. While CB/T3191 typically aligns with certain flange dimensions, we understand global projects require flexibility. We can manufacture valves with flanges to JIS, DIN, ANSI, or other standards to match your existing piping. Please provide the specific standard and pressure rating needed.
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