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Help CenterTrunnion Mounted Ball Valve for Marine Use, DN300 Large Bore, Compliant With ABS and DNV Standards
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As a leading manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Trunnion Mounted Ball Valve, engineered specifically for demanding marine and offshore applications. With our ISO9001-certified production processes and extensive experience in supplying global markets, we understand the critical need for valves that ensure safety, durability, and uninterrupted operation in harsh sea environments. Our DN300 large bore valve is meticulously designed to comply with stringent ABS and DNV standards, offering shipbuilders, shipowners, and offshore operators a trusted solution for critical flow control. This valve represents our dedication to providing robust industrial equipment that meets the exacting requirements of the international maritime industry.
The core design of this valve centers on the trunnion-mounted ball, a feature that provides superior stability and reduces operating torque, especially in large bore sizes like DN300. This makes it ideal for high-pressure applications and ensures long-term, leak-free performance. The large bore (full bore) design minimizes pressure drop across the valve, allowing for efficient fluid transfer, which is crucial for fuel lines, cargo handling, ballast systems, and other essential shipboard piping. Constructed from high-grade materials, the valve body offers exceptional resistance to corrosion from seawater and marine atmospheres.
Key Features and Technical Advantages:
- Robust Trunnion Design: The ball is supported by trunnions at the top and bottom, preventing seat load from being transferred to the stem. This design ensures lower operating torque, reduced seat wear, and reliable sealing even after prolonged cycling.
- Marine-Grade Compliance: Manufactured in accordance with ABS (American Bureau of Shipping) and DNV (Det Norske Veritas) standards, guaranteeing material traceability, design validation, and manufacturing quality suitable for classification society approval.
- Superior Sealing System: Features spring-loaded seats that maintain constant sealing force against the ball. Multiple seat material options, including PTFE and metal, are available to handle different media (oil, water, chemicals) and temperature ranges.
- Fire-Safe Design (Optional): Can be equipped with fire-safe features per API 607/API 6FA standards, where secondary metal seals provide emergency shut-off in case of a fire, a critical safety requirement for offshore platforms and tankers.
- Anti-Static and Blow-Out Proof Stem: Integrated design ensures electrical continuity to prevent static charge buildup and secures the stem to prevent it from being ejected under pressure.
- Versatile Operation: Available with manual lever, gear operator, or automated actuation (pneumatic, electric, or hydraulic) to suit various control system requirements.
Technical Specifications Table:
| Parameter | Specification |
| Size (DN) | 300 |
| Pressure Rating | Class 150, Class 300 (Others available upon request) |
| Body Material | WCB Carbon Steel, CF8/CF8M Stainless Steel, Duplex Steel |
| Seat Material | PTFE, Reinforced PTFE, Metal (Inconel, Stellite) |
| End Connection | Flanged (RF, RTJ), dimensions per ANSI B16.5 / EN / JIS |
| Temperature Range | -29°C to +200°C (varies with seat material) |
| Operation | Manual, Gear, Pneumatic Actuator, Electric Actuator |
Benefits for Your Operations:
- Enhanced Safety & Reliability: Compliance with class standards minimizes risk and ensures vessel/offshore platform integrity.
- Reduced Maintenance & Lifecycle Cost: Durable construction and low-torque operation lead to less frequent maintenance and longer service intervals.
- Operational Efficiency: Large bore design ensures minimal flow restriction, optimizing system performance for fuel transfer, ballasting, and other high-flow duties.
- Global Supply Chain Support: With shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely delivery to your project sites worldwide.
Shanghai Zhibang Valve Manufacture Co., Ltd. is a trusted partner for industrial valves, backed by an annual export value reflecting our strong global presence across North America, South America, Europe, Asia, Africa, and Oceania. Established in 2016, our growth is built on a foundation of quality manufacturing and customer-centric service. Choosing our ABS/DNV-compliant Trunnion Mounted Ball Valve means investing in a component that delivers peace of mind through rigorous design, proven materials, and adherence to international maritime norms. It is a robust, reliable choice engineered to withstand the test of time and the elements. Contact us today to discuss your project specifications and experience the Zhibang difference in marine valve solutions.
Frequently Asked Questions (FAQ)
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Q: What is the main advantage of a trunnion-mounted ball valve over a floating ball valve for marine use?
A: The trunnion-mounted design is superior for large bore, high-pressure applications common in marine systems. It provides much lower operating torque, reduces wear on the seats, and offers more reliable sealing under high differential pressures, making it safer and more durable for critical shipboard services. -
Q: Does this valve come with certification for ABS and DNV?
A: The valve is manufactured to comply with the material, design, and testing requirements of ABS and DNV standards. Final certification is typically issued by the classification society's surveyor upon inspection and testing, for which we provide all necessary manufacturer documentation and support. -
Q: Can this valve be used for cryogenic service on LNG carriers?
A: While our standard design covers a broad temperature range, specific cryogenic applications (like LNG) require special materials, extended stems, and design modifications. We offer valves suitable for low-temperature services; please inquire with your specific temperature and media requirements. -
Q: What are the available actuator options for remote operation?
A: We can supply the valve with pneumatic (double-acting or spring-return), electric, or hydraulic actuators. The choice depends on your available power source, required fail-safe action, and control system interface. -
Q: Is a fire-safe version available?
A: Yes, a fire-safe design is a common and important option for marine and offshore applications. We can provide valves that meet API 607/API 6FA fire test requirements, incorporating secondary metal seals that maintain sealing integrity in a fire scenario. -
Q: What is the typical lead time for a DN300, Class 150 valve?
A: Lead time varies based on material specifications, actuation requirements, and order quantity. For standard configurations, please contact our sales team with your detailed inquiry for an accurate production and delivery schedule. -
Q: Do you provide custom painting or coating for extra corrosion protection?
A: Yes, we offer various external coatings and paint systems, such as epoxy coatings, to provide enhanced protection against saltwater corrosion, which is highly recommended for marine environments. -
Q: What after-sales support do you offer?
A: We provide comprehensive technical documentation, including material test reports, dimensional drawings, and maintenance manuals. Spare parts like seats, seals, and stems are also available to support the lifecycle of the valve.
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