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Help CenterGear Operated Trunnion Mounted Ball Valve for Marine Applications, DN200 Large Bore Size
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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 flow control solutions for demanding environments. Our Gear Operated Trunnion Mounted Ball Valve for Marine Applications, DN200, is engineered to meet the rigorous challenges of offshore and marine operations. This valve combines the inherent strength of a trunnion-mounted design with the precise control of a gear operator, offering exceptional performance in high-pressure, large-bore piping systems where reliability is non-negotiable. We understand the critical nature of marine applications, and this product is a testament to our commitment to durability, safety, and operational efficiency for shipbuilders, shipyards, and offshore platform operators worldwide.
This DN200 valve is designed for superior performance in critical marine systems. Its construction and features address common pain points in marine fluid handling.
- Trunnion-Mounted Ball Design: The ball is supported by trunnions (stem extensions) at the top and bottom, which significantly reduces operating torque and prevents excessive seat wear. This design is ideal for high-pressure applications and large bore sizes like DN200, ensuring smooth operation and a longer service life even with frequent cycling.
- Gear Operator for Effortless Control: The integrated gear operator provides significant mechanical advantage, allowing for easy opening and closing of the large DN200 valve with minimal manual effort. This is crucial for valves installed in hard-to-reach areas on vessels or platforms, enhancing operator safety and convenience.
- Marine-Grade Construction: We offer body materials such as carbon steel (WCB, LCB) or stainless steel (CF8, CF8M) to provide excellent corrosion resistance against saltwater, marine atmospheres, and various cargo fluids. Internal components are selected for compatibility with seawater, ballast water, fuel oil, lubricating oil, and other common marine media.
- Fire-Safe Design Option: For applications involving flammable fluids, a fire-safe design is available. This includes secondary metal seals that maintain a seal in the event of a fire, even if the primary polymeric seats are compromised, enhancing system safety.
- Double Block and Bleed (DBB) Capability: When in the closed position, the valve provides a positive seal on both sides of the ball. The cavity between the seals can be bled off, allowing for safe isolation, testing, and maintenance of the downstream section, a vital feature for pipeline integrity management.
- Extended Stem for Insulation: An optional extended stem design is available to accommodate pipe insulation, ensuring the valve can be operated effectively even on insulated lines common in temperature-controlled cargo systems.
The valve is built to comply with major international standards commonly specified in marine projects, ensuring global acceptance and interoperability.
| Parameter | Specification |
|---|---|
| Nominal Size (DN) | 200 |
| Nominal Pressure (PN) | 16, 25, 40, 63, 100 (Standard: PN40) |
| Pressure Class (ASME) | 150, 300, 600 (Available upon request) |
| Face-to-Face Dimension | Per API 6D / ISO 17292 |
| Flange Standard | ISO, ASME B16.5, JIS, DIN (Specify) |
| Temperature Range | -29°C to +200°C (Standard seats); Wider ranges customizable |
| Leakage Class | API 6D: Class VI (Soft Seat), Class IV (Metal Seat) |
| Gearbox Ratio | Customizable (e.g., 5:1, 10:1) for required torque output |
The primary benefits for our clients are clear and impactful. The reduced operating torque translates to lower maintenance costs and less strain on operators. The robust trunnion design ensures reliable sealing over a long lifespan, minimizing downtime and the risk of costly leaks or failures at sea. The valve's compliance with international standards simplifies procurement and integration into global marine projects. Furthermore, the customizable options for materials, pressure ratings, and stem extensions allow for a perfect fit with specific system requirements, whether for new builds or retrofits.
Shanghai Zhibang Valve operates under a stringent ISO9001:2015 certified quality management system, ensuring every valve, including this DN200 model, is manufactured with consistent precision and subjected to rigorous testing. With an annual export value consistently between US$1-1.5 million, our products have earned trust across diverse markets from North America and Western Europe to Southeast Asia and the Middle East. We ship efficiently from major ports like Shanghai, Guangzhou, and Hong Kong, supporting global supply chains. Choosing our Gear Operated Trunnion Ball Valve means partnering with a proven manufacturer committed to delivering the durability, performance, and safety your marine applications demand. Contact us today to discuss your project specifications or to request a detailed quotation.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a trunnion-mounted design over a floating ball design for a DN200 valve?
A1: For large bore sizes like DN200, a trunnion-mounted design is superior. It supports the ball at both ends, drastically reducing the operating torque required and preventing the ball from shifting under high pressure, which can cause seat deformation and premature wear. This results in easier operation and significantly longer service life in high-pressure marine systems.
Q2: Can this valve be used for both on/off service and flow control (throttling) in marine systems?
A2: While primarily designed for reliable on/off isolation, the gear operator allows for fine positioning. However, for continuous throttling service, especially with abrasive media, it is recommended to consult with our engineers, as seat material selection becomes critical to avoid cavitation damage.
Q3: What seat material options are available, and how do I choose?
A3> We offer PTFE for general service, reinforced PTFE (RPTFE) for higher temperatures and better wear resistance, and metal seats (e.g., stainless steel) for high-temperature or abrasive service. The choice depends on the fluid media, temperature, pressure, and required fire-safe capability.
Q4: Is the gear operator suitable for remote operation?
A4: Yes. The standard gear operator has a handwheel for local manual operation. It can also be easily adapted for connection to electric, pneumatic, or hydraulic actuators for remote and automated control systems commonly found on modern vessels and offshore platforms.
Q5: What testing is performed on the valves before shipment?
A5> Each valve undergoes a series of tests, which typically include a hydrostatic shell test (1.5x rated pressure), a seat leakage test (per API 598 or ISO 5208 standards), and operational tests for the gearbox. Certified test reports can be provided upon request.
Q6: What is the typical lead time for a DN200, PN40 valve?
A6: Lead time varies based on material specifications, quantity, and customization. For standard configurations in carbon steel, typical production time is 4-6 weeks. We recommend contacting our sales team with your specific requirements for an accurate timeline.
Q7: Do you provide support for installation and maintenance?
A7: Yes, we provide detailed installation, operation, and maintenance manuals with each shipment. For complex projects, technical support is available upon request to ensure proper integration into your system.
Q8: Can you supply valves with specific paint or coating requirements for marine corrosion protection?
A8: Absolutely. We can apply standard marine-grade epoxy coatings or custom coatings as per client specifications (e.g., NORSOK M-501, specific color codes) to provide enhanced protection against the harsh saltwater environment.
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