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Help CenterMarine Gate Valve for Cryogenic Storage Tanks, Operating Temperature -196℃
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As a specialized manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance Marine Gate Valve engineered specifically for cryogenic storage tank applications. This valve is designed to meet the rigorous demands of LNG (Liquefied Natural Gas) transportation and storage, where maintaining a reliable seal at temperatures as low as -196°C is critical for safety, efficiency, and operational integrity. With an annual export value demonstrating our global reach, we understand the precise requirements of marine and energy sectors worldwide. Our valve offers a robust solution that ensures zero leakage, exceptional durability, and long service life in the most challenging cryogenic environments, providing peace of mind for shipbuilders, tank operators, and EPC contractors.
The core value of this marine gate valve lies in its specialized design for extreme cold. Unlike standard gate valves, it incorporates features that prevent seat freezing, maintain stem seal integrity, and allow for thermal contraction without compromising the seal. This is essential for applications involving liquefied gases like LNG, LPG, liquid nitrogen, or liquid oxygen on FSRUs (Floating Storage and Regasification Units), LNG carriers, and onshore storage terminals. The extended bonnet design is a key feature, creating a thermal barrier that keeps the packing and operating mechanism at a temperature where standard sealing materials can function effectively, far away from the ultra-cold process fluid.
- Extended Bonnet & Stem Design: The extended neck places the stem packing and yoke assembly in a warmer zone, preventing packing freeze-up and ensuring smooth, reliable operation even after prolonged exposure to cryogenic temperatures.
- Cryogenic-Tested Materials: Body and trim components are manufactured from impact-tested austenitic stainless steels (e.g., 316L, CF8M) that retain toughness and prevent brittle fracture at -196°C.
- Bidirectional Sealing: The wedge gate design provides tight shut-off in both flow directions, a crucial safety feature for tank isolation.
- Fire-Safe Option: Available with fire-safe design per API standards, providing an additional layer of safety by maintaining a seal in the event of an external fire.
- Low Torque Operation: Precision-machined seats and specially treated wedges minimize operating torque, reducing wear on actuators and making manual operation feasible.
- Versatile Actuation: Can be supplied as a manual valve or fitted with pneumatic, electric, or hydraulic actuators for remote and automated control systems.
The technical specifications of our cryogenic gate valve are tailored for marine service. Below is a summary of key parameters available across our standard range:
| Parameter | Specification |
| Design & Test Standards | API 600, API 6D, BS 1873, ISO 15848-1 (Fugitive Emissions) |
| Pressure-Temperature Rating | ASME B16.34, Class 150, 300, 600 |
| Face-to-Face Dimensions | ASME B16.10, API 6D |
| Flange Connection | ASME B16.5, RF or RTJ, PN10 to PN100 |
| Leakage Class (Seat) | API 598 / ISO 5208 Rate A (Bidirectional) |
| Stem Seal System | Graphite Packing with Live-Loading for low temp |
For clients, the advantages translate directly into operational benefits and cost savings. The valve's reliability minimizes unplanned downtime and maintenance interventions in hard-to-access marine environments. Its robust construction reduces the risk of catastrophic failure, protecting valuable cargo and ensuring crew safety. The compatibility with various actuation methods allows for seamless integration into modern ship automation systems, enabling centralized control and monitoring. Furthermore, our valves are designed for easy in-line maintenance when required, helping to extend the overall lifecycle of the asset.
Frequently Asked Questions (FAQ)
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Q: Why is an extended bonnet necessary for a cryogenic gate valve?
A: The extended bonnet creates a thermal barrier. It distances the stem packing and operating threads from the ultra-cold fluid, preventing the packing from freezing solid and ensuring the valve remains operable at all times. -
Q: Can this valve be used for both liquid and gas service in cryogenic conditions?
A: Yes. It is designed for full-bore flow and is suitable for both liquid and gaseous phases of cryogenic media, such as LNG, LN2, LOX, or ethylene. -
Q: What is the typical delivery lead time for these specialized valves?
A: Lead times vary based on size, pressure class, and actuation requirements. Standard configurations typically have a shorter lead time, while customized orders may require additional engineering and manufacturing period. Specific timelines can be provided upon request. -
Q: Are these valves suitable for submerged pump discharge or suction lines on LNG tanks?
A: Absolutely. Their robust bidirectional sealing capability and cryogenic design make them an ideal choice for isolation on pump columns and other critical lines in LNG storage tanks. -
Q: Do you provide third-party inspection and certification for the valves?
A> Yes. We can arrange and support inspections by recognized third-party agencies (e.g., DNV, BV, ABS, LR) for material verification, pressure testing, and functional testing as per project specifications. -
Q: How do you ensure the material toughness at -196°C?
A: We source certified materials and perform Charpy V-Notch impact testing at the designated low temperature to verify the material meets the required toughness standards (e.g., ASTM A352 Gr. LC3/LCB for cast bodies). -
Q: Is partial stroke testing possible with actuated versions?
A: For valves equipped with pneumatic or electric actuators, partial stroke test (PST) functionality can be incorporated into the control package upon request, allowing for periodic functional testing without taking the valve offline.
Backed by our ISO9001 certified manufacturing processes, Shanghai Zhibang ensures that every marine cryogenic gate valve meets stringent quality controls from raw material to final assembly. Our proven track record, evidenced by consistent exports to demanding markets across North America, Europe, Southeast Asia, and the Middle East, underscores our commitment to reliability and performance. We support global logistics with flexible shipment options from major ports like Shanghai, Guangzhou, and Hong Kong. Choose a valve engineered for the extreme, backed by a manufacturer trusted worldwide. Contact our technical sales team today to discuss your specific application requirements, request detailed datasheets, or obtain a competitive quotation.
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