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Help CenterCryogenic JIS F7301 Stainless Steel Ball Valve, Extended Bonnet, Suitable for -196°C LNG Service
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As a specialized manufacturer with years of experience in industrial valve solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Cryogenic JIS F7301 Stainless Steel Ball Valve. Engineered specifically for extreme low-temperature applications, this valve is a reliable and safe choice for handling liquefied natural gas (LNG) and other cryogenic fluids down to -196°C. Our commitment to quality, backed by ISO9001 certification, ensures that every valve delivers exceptional sealing performance, operational longevity, and safety in the most demanding environments.
This valve is designed to address the unique challenges of cryogenic service, where material embrittlement and thermal contraction are critical concerns. The extended bonnet design is a key feature, isolating the stem packing from the extreme cold of the process fluid. This prevents freezing of the packing, ensures smooth operation, and protects the operator. Constructed from high-grade stainless steel, it offers superior corrosion resistance and strength at low temperatures.
Core Features & Technical Advantages:
- Extended Bonnet Design: The extended neck (bonnet) creates a thermal barrier, keeping the stem seals and operating mechanism at a higher, ambient temperature. This is crucial for preventing seal failure and ensuring reliable, low-torque operation even after prolonged exposure to cryogenic temperatures.
- JIS F7301 Compliance: Manufactured in accordance with the Japanese Industrial Standard for cryogenic valves, ensuring rigorous design, material, and testing requirements are met for safe operation in low-temperature services.
- Robust Construction: The valve body, ball, and stem are made from carefully selected stainless steel grades suitable for cryogenic applications, maintaining ductility and impact resistance at -196°C.
- Bubble-Tight Sealing: Utilizes advanced seat materials like PTFE or reinforced PTFE, which retain their sealing properties across the wide temperature range, providing a bubble-tight shut-off essential for LNG systems.
- Versatile End Connections: Standardly supplied with flanged ends for secure pipeline integration. Other connection types can be customized to fit specific project requirements.
- Multiple Actuation Options: Available with a standard manual lever for direct operation. For larger sizes or higher pressure applications, gear operators are available as an option to reduce required operating torque.
Key Technical Specifications:
| Parameter | Specification |
| Design Standard | JIS F7301 |
| Body Material | Stainless Steel (CF8/CF8M, etc.) |
| Temperature Range | -196°C to +80°C |
| Pressure Rating | Class 150, Class 300 (Customizable) |
| Port Size | DN15 to DN300 (1/2" to 12") |
| Seat Material | PTFE, Reinforced PTFE, PEEK (Optional) |
| Fire Safe Design | API 607/API 6FA compliant option available |
| Leakage Class | ANS/FCI 70-2 Class VI (Bubble-tight) |
Benefits for Your Operation:
- Enhanced Safety: The design minimizes risks associated with cryogenic fluid handling, such as seal leakage or operational failure due to frozen components.
- Reduced Maintenance: The extended bonnet and robust construction lead to less frequent maintenance intervals and lower lifetime costs.
- System Integrity: Bubble-tight shut-off prevents product loss and maintains system pressure in critical LNG storage and transfer applications.
- Operational Reliability: Ensures consistent, low-torque operation over the valve's lifespan, reducing operator effort and potential for damage.
- Global Compliance: Adherence to JIS F7301 makes it suitable for international projects, particularly in Asian and global markets with stringent standards.
Shanghai Zhibang Valve has been a trusted manufacturer since 2016, exporting high-quality valve solutions worldwide, including to North America, Europe, Southeast Asia, and the Middle East. Our annual export value reflects the confidence global partners place in our products. We understand the critical nature of cryogenic applications, and our valves are built to provide peace of mind. Each valve undergoes stringent quality checks as part of our ISO9001-certified process. For your next LNG, liquid nitrogen, or other cryogenic project, choose a valve engineered for extreme performance. Contact us today to discuss your specifications or request a detailed quotation.
Frequently Asked Questions (FAQ):
Q1: Why is an extended bonnet necessary for a cryogenic ball valve?
A1: In cryogenic service, the extended bonnet acts as a thermal barrier. It distances the stem packing and operating mechanism from the ultra-cold fluid inside the valve body. This prevents the packing from freezing solid, which would make the valve impossible to operate and could damage the stem seals, leading to leaks.
Q2: What does JIS F7301 mean, and is it equivalent to other standards?
A2: JIS F7301 is a Japanese Industrial Standard specifically for steel valves intended for cryogenic service. It defines requirements for design, materials, manufacturing, and testing at low temperatures. While it has similarities to standards like BS 6364, it is a recognized and respected standard in its own right, particularly in Asian markets and global projects specifying Japanese standards.
Q3: Can this valve be used for services other than LNG?
A3: Absolutely. While optimized for LNG at -162°C to -196°C, this valve is suitable for a wide range of cryogenic fluids, including liquid nitrogen (-196°C), liquid oxygen, liquid argon, ethylene, and other liquefied gases requiring handling at extremely low temperatures.
Q4: What are the available actuation options?
A4: The valve is standardly furnished with a manual lever for sizes up to a certain diameter. For larger valve sizes or higher differential pressure applications where handwheel or lever operation torque is high, we offer optional gear operators. Pneumatic, electric, or hydraulic actuators can also be fitted upon request for automated control systems.
Q5: Is a fire-safe version available?
A5: Yes. We offer an optional fire-safe design compliant with standards such as API 607 or API 6FA. This version includes features like secondary metal seals that engage in the event of a fire to prevent catastrophic failure if the primary soft seals are compromised.
Q6: What is the typical delivery time for this product?
A6: Delivery time depends on the specific size, pressure class, and material specifications ordered. Standard configurations typically have a shorter lead time. We provide reliable shipment from major Chinese ports like Shanghai and Guangzhou. Please contact our sales team with your requirements for an accurate delivery schedule.
Q7: Do you provide customization for special project needs?
A7: Yes, as a manufacturer, we have the flexibility to customize various aspects. This can include special materials of construction (like different stainless grades), specific end connections (butt weld, socket weld), extended or reduced face-to-face dimensions, special trim, and testing protocols. Please share your detailed specifications for a tailored solution.
Q8: What kind of testing is performed on these cryogenic valves?
A8> Each valve undergoes standard shell and seat pressure tests at ambient temperature. For cryogenic service, additional tests such as low-temperature seat leakage tests (often with helium) can be performed to validate bubble-tight sealing at the designated cryogenic temperature, ensuring performance in the actual service condition.
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