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Help CenterLarge Bore Trunnion Ball Valve for Ship Main Seawater and Fuel Oil Lines, DN300
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As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve is proud to present our robust Large Bore Trunnion Ball Valve, engineered specifically for the demanding environments of ship main seawater and fuel oil lines. With an annual export value exceeding US$1 million and a strong presence in global markets from North America to Southeast Asia, we understand the critical need for reliability in marine applications. Our DN300 valve is designed to deliver exceptional sealing performance, durability, and ease of operation, ensuring the safe and efficient management of vital shipboard fluids. This product represents our commitment to providing high-performance flow control solutions that shipbuilders and operators can trust.
This large bore valve is built to withstand the corrosive nature of seawater and the demanding specifications of fuel oil systems. The trunnion-mounted design is key to its performance, providing superior stability and reduced operating torque even under high differential pressures. This makes it an ideal choice for main line isolation and control duties.
- Robust Trunnion Design: The ball is supported by trunnions at the top and bottom, minimizing seat load and wear. This ensures a longer service life and reliable, bubble-tight sealing in both directions, critical for safety in marine fuel and water systems.
- Superior Sealing Systems: Features dual-seal, self-relieving seat design. Primary seals provide excellent shut-off, while secondary seals offer an additional safety barrier. Seat materials like reinforced PTFE or metal are selected based on service media (seawater or fuel oil) and temperature.
- Fire-Safe Construction: Engineered with fire-safe features in accordance with industry standards like API 607/6FA. In the event of a fire, the metal secondary seals engage to prevent catastrophic leakage, a vital safety requirement for fuel oil lines.
- Anti-Static and Blowout-Proof Stem: The stem is designed to prevent static electricity buildup and is securely retained to avoid blowout under pressure, ensuring operational safety for personnel and equipment.
- Low Operating Torque: The trunnion support and low-friction bearings significantly reduce operating torque. This allows for the use of smaller, more cost-effective actuators and reduces wear on manual gear operators.
- Full Port (Full Bore) Design: The DN300 valve offers a full port, minimizing pressure drop and allowing for efficient flow, pigging, and easy inspection of the pipeline.
Below is a summary of key technical specifications for our standard DN300 Trunnion Ball Valve:
| Parameter | Specification |
| Nominal Size (DN) | 300 |
| Pressure Class | Class 150, Class 300, Class 600 (ASME) |
| Design & Test Standards | API 6D, ASME B16.34, API 598 |
| End Connection | Flanged (RF, RTJ) per ASME B16.5 |
| Body Material Options | WCB (Carbon Steel), CF8/CF8M (Stainless 304/316), Duplex |
| Seat & Seal Materials | PTFE, RPTFE, PEEK, Metal (Inconel/Stellite) |
| Operation Type | Manual Lever, Manual Gearbox, Pneumatic Actuator, Electric Actuator |
| Temperature Range | -29°C to 200°C (standard), wider ranges available |
The advantages of choosing our valve translate directly into benefits for your project. You gain a highly reliable shut-off device that minimizes maintenance downtime and operational risks. The extended service life reduces total cost of ownership. Furthermore, its compatibility with various actuators allows for easy integration into automated control systems, enhancing operational efficiency on modern vessels.
With our established manufacturing expertise since 2016 and a proven track record of supplying valves to major shipping regions worldwide, including North America, Europe, and Southeast Asia, you can be confident in the quality and performance of our products. We ship efficiently from major Chinese ports like Shanghai and Guangzhou. Our DN300 Large Bore Trunnion Ball Valve is engineered to meet the rigorous demands of marine service. Contact Shanghai Zhibang Valve today to discuss your specific requirements, request a detailed quotation, or learn more about how this valve can enhance the safety and efficiency of your ship's piping systems.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a trunnion-mounted ball valve over a floating ball valve for DN300 applications?
A1: For large bore sizes like DN300, a trunnion-mounted design is superior. It supports the ball on fixed trunnions, which drastically reduces the operating torque and prevents excessive seat wear, especially under high pressure. This results in easier operation and a longer service life.
Q2: Is this valve suitable for both seawater and heavy fuel oil (HFO) service?
A2: Yes, it is specifically designed for both. The material selection is key. For seawater, we recommend stainless steel (CF8M/316) or duplex steel bodies with compatible seat materials. For fuel oil lines, carbon steel (WCB) with appropriate seals is common. We can advise on the best material combination for your specific media.
Q3: What fire-safe certifications does this valve have?
A3: Our valves can be manufactured to comply with fire-safe testing standards such as API 607 (soft-seated) or API 6FA. Please specify your fire-safe requirement when inquiring, and we will confirm the applicable design and available testing documentation.
Q4: Can this valve be supplied with actuators?
A4: Absolutely. We offer a range of actuation options including manual gearboxes, pneumatic actuators (double-acting or spring-return), and electric actuators. We can pre-assemble and test the valve-actuator package before shipment for your convenience.
Q5: What is the delivery lead time for a DN300 valve?
A5: Lead time depends on the material, pressure class, and actuation specifications. For standard configurations, typical lead time is 4-8 weeks. We provide accurate lead time estimates with every quotation.
Q6: Do you provide documentation like test reports and material certificates?
A6> Yes, as a standard practice, we provide essential documentation including a manufacturer's data report, hydrostatic test report, and material certificates (3.1 or 3.2 as applicable) with each valve shipment.
Q7: What are the available flange face types and standards?
A7: The valves are typically supplied with flanges per ASME B16.5. Common face types include Raised Face (RF) and Ring Type Joint (RTJ). Other standards like DIN or JIS can be accommodated upon request.
Q8: How does your company ensure quality control?
A8: Our manufacturing processes are governed by an ISO9001 quality management system. Each valve undergoes rigorous in-process inspections and final testing (including shell test, seat test, and operational tests) per API 598 or other specified standards before release.
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