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Help CenterMarine Gate Valve for Low Temperature Service Down to -196℃, Stainless Steel Body
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As a leading manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions for demanding industrial applications. Our Marine Gate Valve for Low Temperature Service is engineered to deliver exceptional reliability and safety in the most challenging cryogenic environments, down to an extreme -196°C. Designed specifically for marine and offshore applications, this valve is built to withstand the rigors of handling liquefied natural gas (LNG), liquid nitrogen, oxygen, argon, and other ultra-cold fluids, ensuring uninterrupted operation and protecting critical shipboard systems.
This valve is the result of our commitment to precision engineering and quality, backed by years of expertise in serving global markets across North America, Europe, Asia, and beyond. We understand the critical need for valves that perform flawlessly under extreme thermal stress, preventing leaks and failures that can lead to costly downtime and safety hazards. Our cryogenic gate valve is a cornerstone of safe and efficient cryogenic fluid management.
Core Product Features & Technical Advantages:
- Superior Low-Temperature Material Integrity: The valve body and critical internal components are constructed from specially selected stainless steel grades, such as CF8M (316) or LCB/LCC for low-temperature carbon steel options. These materials are treated and tested to maintain toughness and prevent brittle fracture at temperatures as low as -196°C (-320°F), ensuring structural integrity under thermal shock.
- Extended Bonnet Design: A key feature for cryogenic service is the extended bonnet (or long neck design). This design places the stem packing and operating mechanism away from the extreme cold of the fluid path. This prevents packing freeze-up, allows for easier operation, and maintains a warmer environment for the stem seals, drastically extending their service life and reducing maintenance.
- Bubble-Tight Shut-Off with Metal Seats: Equipped with precision-machined metal-to-metal seats (typically Stellite hardened or similar), the valve provides a bubble-tight seal in both directions. This is essential for cryogenic service where even minor leakage can cause ice formation, pressure build-up, or fluid loss. The wedge design is optimized for low operating torque even after prolonged exposure to extreme cold.
- Anti-Static and Fire-Safe Design Considerations: While standard configurations are robust, designs incorporating anti-static devices and fire-safe features (per API 607/6FA) are available upon request. These are critical for applications involving flammable cryogenic fluids like LNG, providing an added layer of safety.
- Versatile Actuation and Control: The valve is designed for flexible integration. It can be supplied with a standard handwheel, bevel gear operator for high-torque applications, or prepared for the mounting of pneumatic, hydraulic, or electric actuators. This allows for remote operation and integration into automated shipboard control systems.
Detailed Technical Specifications:
| Parameter | Specification |
|---|---|
| Body Material | Stainless Steel (A351 CF8M, A352 LCB/LCC), Duplex Steel Optional |
| Temperature Range | -196°C to +100°C (Standard), Higher up to +200°C upon request |
| Pressure Class | ANSI Class 150, 300, 600; PN10, PN16, PN25, PN40 |
| Size Range (Nominal Bore) | DN50 (2") to DN600 (24") |
| End Connection | Flanged (RF, RTJ), Butt-Weld, Socket Weld (Small Sizes) |
| Stem Material | Stainless Steel (A182 F6a/F316), with Hardened Surface |
| Seat & Wedge | Stellite Hardfaced or 13% Cr Stainless Steel |
| Packing | Graphite-based, Specially Formulated for Cryogenic Service |
| Design & Test Standards | API 600, API 598, BS 6364 (Cryogenic Valves) |
Benefits for Your Operations:
- Enhanced System Safety & Reliability: The robust design and rigorous testing minimize the risk of in-service failure, protecting personnel, cargo, and marine assets. Reliable shut-off prevents cross-contamination and uncontrolled release of hazardous fluids.
- Reduced Lifecycle Cost: Durable materials and the extended bonnet design lead to longer maintenance intervals and lower total cost of ownership. High-quality construction reduces the frequency of repairs and replacements.
- Operational Efficiency: Smooth, predictable operation even at extreme temperatures ensures valves can be operated when needed, preventing delays in loading, unloading, or process operations aboard vessels.
- Global Compliance & Compatibility: Manufactured to international standards (API, ANSI, DIN), our valves ensure easy integration into existing ship piping systems and compliance with the requirements of major marine classification societies (ABS, DNV, LR, etc., certification available upon request).
- Customization & Support: We offer customization in terms of material trim, end connections, and actuation to meet specific project requirements. Our technical team provides support from selection through installation.
With our established presence since 2016 and a proven export track record of US$1-1.5 million annually, Shanghai Zhibang Valve has built a reputation for quality and dependability. Our ISO9001-certified manufacturing processes ensure every valve, including this critical cryogenic gate valve, meets stringent quality control checks before shipment. We efficiently serve clients worldwide through major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery to your project sites across North America, Europe, Southeast Asia, and other key markets.
Choosing our Marine Gate Valve for Low Temperature Service means investing in a component designed for peak performance under pressure and extreme cold. It is a reliable partner for your LNG carriers, FSRUs, gas supply systems, and any application where temperature drops to cryogenic levels. Don't compromise on safety or performance. Contact our sales team today for a detailed quotation, technical datasheets, or to discuss your specific application requirements. Let us provide you with a valve solution that stands the test of time and temperature.
Frequently Asked Questions (FAQ)
Q1: What is the main purpose of the "extended bonnet" on this valve?
A1: The extended bonnet (or long stem) is crucial for cryogenic service. It creates a distance between the super-cold fluid in the valve body and the stem packing/gland area. This prevents the packing from freezing solid, which would lock the valve and make it inoperable. It also keeps the operating mechanism at a safer, more manageable temperature.
Q2: Can this valve be used for both LNG and liquid nitrogen service?
A2: Yes, absolutely. The design and material selection for a -196°C rating cover a wide range of cryogenic fluids, including liquefied natural gas (LNG, approx. -162°C), liquid nitrogen (-196°C), liquid oxygen, and liquid argon. However, material compatibility for specific fluid purity (e.g., oxygen service) should be confirmed during the ordering process.
Q3: What types of end connections are typically offered?
A3: Flanged ends are the most common for marine applications, conforming to ANSI, DIN, JIS, or GB standards. We also provide butt-weld ends for permanent, leak-free piping connections, and socket weld ends for smaller diameter valves. The specific connection type and facing (RF, RTJ) can be specified to match your existing pipeline.
Q4: Is this valve suitable for automated operation?
A4: Yes. The valve is designed to be easily fitted with various actuators. We can supply the valve with a manual handwheel, a gear operator, or we can prepare it (drill and tap mounting holes, provide a mounting bracket) for the installation of pneumatic, hydraulic, or electric actuators based on your control system requirements.
Q5: How do you ensure the valve doesn't become brittle at such low temperatures?
A5: We use materials certified for low-temperature service, such as ASTM A352 LCB/LCC (carbon steel) or A351 CF8M (stainless steel). These materials have undergone specific heat treatment processes and are tested for Charpy Impact toughness at the specified minimum temperature to guarantee they retain sufficient ductility and resist brittle fracture.
Q6: What testing is performed on these valves before shipment?
A6: Each valve undergoes a series of tests per API 598 and BS 6364 standards. This includes a shell test (hydrostatic pressure test on the body), a seat leak test (to ensure bubble-tight closure), and for cryogenic valves, often an extended cold box test or a cryogenic test using liquid nitrogen to verify performance and sealing at low temperatures.
Q7: Do you provide certification for marine classification societies?
A7> We can arrange for third-party inspection and certification from major marine classification societies such as ABS, DNV, BV, or Lloyd's Register upon request. This involves additional witness testing and documentation review, which can be organized as part of your order.
Q8: What is the typical lead time for an order of these valves?
A8: Lead time depends on the size, material, pressure class, and quantity. For standard configurations in common sizes, we often have shorter lead times. For large, customized, or special material orders, the lead time will be longer. Please contact us with your specific requirements for an accurate delivery schedule.
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