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Help CenterCryogenic Ball Valve for LNG Bunkering and Transfer Systems on Vessels
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As a specialized manufacturer with a focus on high-performance fluid control solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our advanced Cryogenic Ball Valve series, engineered specifically for the demanding environments of LNG bunkering and transfer systems on vessels. Since our establishment in 2016, we have dedicated ourselves to mastering the complexities of cryogenic applications, ensuring our products meet the rigorous standards required for safe and efficient marine operations. Our valves are designed to provide exceptional reliability and leak-tight sealing at ultra-low temperatures, directly addressing the critical needs of ship owners, bunker suppliers, and shipyard operators for a robust and dependable flow control component. With an annual export value reflecting our global reach and commitment to quality, we offer a product that is not just a valve, but a cornerstone for secure LNG handling.
Our Cryogenic Ball Valves are the result of meticulous engineering and stringent quality control. They are built to perform flawlessly in the challenging conditions of LNG service, where temperatures can plunge to -196°C (-320°F). The core of their performance lies in the specialized design and material selection, which prevent common failure modes such as seat freezing, stem leakage, and thermal contraction issues.
- Extended Bonnet & Cold Box Design: A key feature is the extended bonnet (also known as a cold box or extended stem). This design creates a thermal barrier, ensuring that the stem packing and actuator operate at ambient temperatures, far from the cryogenic fluid. This prevents packing freeze-up, ensures smooth operation, and protects critical components.
- Superior Material Construction: The valve body, ball, and stem are typically manufactured from austenitic stainless steels like SS316, SS316L, CF8M, or CF3M, which retain excellent toughness and mechanical properties at cryogenic temperatures. For enhanced durability, we offer options with hardened balls or metal-seated designs for abrasive services.
- Advanced Sealing Technology: We utilize high-performance seat and seal materials such as reinforced PTFE or PEEK (Polyether Ether Ketone). These materials maintain elasticity and sealing integrity at extremely low temperatures, providing a bubble-tight shut-off and long service life. Fire-safe designs compliant with API 607/6FA standards are also available.
- Anti-Static & Blow-Proof Stem: The stem design incorporates anti-static devices to prevent spark generation from static electricity, a critical safety feature for handling flammable LNG. A blow-out-proof stem ensures the stem cannot be ejected under pressure, enhancing operational safety.
- Versatile Actuation Options: To suit various automation requirements on vessels, our valves can be fitted with manual levers, gear operators, pneumatic actuators, or electric actuators. This flexibility allows for integration into remote-controlled bunkering systems or local manual operations.
The technical specifications of our standard cryogenic ball valve series are outlined below. Custom configurations for specific pressure ratings, sizes, and end connections are available upon request.
| Parameter | Specification / Option |
|---|---|
| Size Range | 1/2" to 12" (DN15 to DN300) |
| Pressure Rating | Class 150, 300, 600 (PN16, PN40, PN100) |
| Body Material | Stainless Steel 316/316L, CF8M, CF3M |
| Ball Material | SS316, SS316L with Chrome Plating or Hard Coating |
| Seat Material | PTFE, RPTFE, PEEK, Metal (for fire-safe) |
| Stem Material | SS316, SS316L with Blow-Proof Design |
| End Connection | RF Flange, RTJ Flange, Butt Weld, Socket Weld |
| Temperature Range | -196°C to +80°C (-320°F to +176°F) |
| Design Standard | API 6D, BS 5351, ISO 17292 |
| Fire Safe Standard | API 607 / API 6FA (Optional) |
Choosing our cryogenic ball valves brings tangible benefits to your LNG operations. The robust construction minimizes downtime and maintenance costs, while the reliable sealing ensures zero leakage during bunkering, protecting both safety and profitability. The versatility in size and actuation allows for a perfect fit in diverse system layouts, from small auxiliary lines to large main transfer pipes. Ultimately, our valve provides the peace of mind that comes from using a component designed and tested for one of the most challenging applications in the marine industry.
Shanghai Zhibang Valve operates under a stringent ISO9001 certified quality management system, a testament to our unwavering commitment to product consistency and reliability. Our valves are trusted by partners across the globe, from North America and Western Europe to Southeast Asia and the Middle East, serving a wide spectrum of the international marine sector. We support this global network with efficient logistics, shipping from major ports including Shanghai, Guangzhou, and Hong Kong. For your next LNG bunkering or vessel transfer system project, invest in a valve solution backed by manufacturing expertise, certified quality processes, and proven global acceptance. Contact us today to discuss your specific requirements and receive a detailed quotation.
Frequently Asked Questions (FAQ)
Q1: Why is an extended bonnet necessary for a cryogenic ball valve?
A1: The extended bonnet acts as a thermal barrier. It distances the stem seals and actuation mechanism from the extremely cold fluid inside the valve body. This prevents the packing from freezing solid, which would make the valve impossible to operate, and ensures the actuator functions at normal ambient temperatures.
Q2: Can your valves handle both LNG bunkering (loading) and vapor return lines?
A2: Absolutely. Our cryogenic ball valves are designed for bidirectional flow and can be used in both liquid LNG transfer lines and vapor return (BOG - Boil Off Gas) lines on bunkering systems and vessels, provided the pressure and temperature ratings are suitable for the service.
Q3: What is the lead time for a typical order of these valves?
A3: Lead times vary based on size, material, actuation type, and order quantity. Standard configurations often have shorter lead times. We recommend contacting our sales team with your specific needs for an accurate production and delivery schedule.
Q4: Do you provide valves with actuators pre-installed and tested?
A4: Yes, we offer comprehensive packages where the valve is assembled with a pneumatic or electric actuator, tested for functionality and leak-tightness, and shipped as a ready-to-install unit. This saves significant time and effort during system integration.
Q5: How do you ensure the valves remain leak-tight after thermal cycling?
A5: Our valve design accounts for differential thermal contraction of materials. The seat design often includes spring-loaded mechanisms or special geometries that maintain sealing force as temperatures change. Furthermore, all our cryogenic valves undergo rigorous low-temperature testing before shipment.
Q6: Are your valves suitable for offshore or harsh marine environments?
A6: Yes. The standard materials (stainless steel) offer excellent corrosion resistance. For particularly harsh offshore environments, we can discuss optional surface treatments or specific material grades to enhance longevity against saltwater spray and atmospheric corrosion.
Q7: What documentation do you provide with the valves?
A7: Standard documentation includes a material test certificate (MTC/CMTR), product data sheet, and a certificate of conformity. Additional documentation like inspection reports, pressure test charts, or third-party certification can be arranged upon request.
Q8: Can you customize valves for non-standard pressure ratings or special connections?
A8: We have strong engineering capabilities to accommodate custom requirements, including special pressure classes, exotic material combinations, or unique end connections. Please share your technical specifications for evaluation and feasibility.
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