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Help CenterCB/T3191 Cryogenic Ball Valve With Anti-Static Design, Fire-Safe Option Available
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As a professional manufacturer of industrial valves with a strong presence in global markets, Shanghai Zhibang Valve is proud to introduce our CB/T3191 Cryogenic Ball Valve. Engineered for demanding low-temperature applications, this valve incorporates a specialized anti-static design to ensure operational safety in environments where static electricity poses a risk. We understand the critical need for reliability in cryogenic systems, and our valve is built to deliver consistent performance, backed by our ISO9001 certified manufacturing processes and over eight years of industry expertise. The optional fire-safe design further enhances its suitability for a wide range of industrial settings, providing our clients with a versatile and dependable solution for their fluid control needs.
This valve is specifically designed to handle the challenges of cryogenic service, where materials and components must withstand extreme cold without failure. The core of its performance lies in several key design and material features:
- Anti-Static Design: A critical safety feature that ensures continuous electrical continuity between the ball, stem, and valve body. This prevents the dangerous buildup of static electricity, which can be a significant ignition hazard when handling flammable media like LNG, liquid oxygen, or ethylene at low temperatures.
- Extended Bonnet: The valve features a long, extended bonnet or stem. This design moves the standard packing and operating mechanism away from the cold fluid path, maintaining the seals and stem at a higher, more manageable temperature. This prevents packing freeze-up and ensures smooth operation even in sustained cryogenic conditions.
- Fire-Safe Option: For applications requiring additional safety, a fire-safe design is available. This construction incorporates secondary metal-to-metal seals and graphite seals that maintain a seal even if the primary soft seals are compromised in a fire event, helping to prevent catastrophic fluid release.
- Low-Temperature Materials: All wetted parts and critical components are manufactured from materials selected for their toughness and ductility at cryogenic temperatures, such as stainless steel (CF8M, CF3M), Monel, or other suitable alloys to prevent brittle fracture.
- Bidirectional Sealing: The precision-machined ball and seat design provides reliable sealing in both flow directions, offering flexibility in piping system design and installation.
- Blowout-Proof Stem: The stem is securely retained within the valve body even under full pressure, providing an essential safety feature for high-pressure cryogenic service.
The technical specifications of the CB/T3191 Cryogenic Ball Valve are designed to meet rigorous industry standards. Below is a summary of key parameters:
| Parameter | Specification / Range |
| Design & Manufacturing Standard | CB/T3191 |
| Size Range | DN15 (1/2") to DN300 (12") (Custom sizes available) |
| Pressure Class | PN16 to PN100 (Class 150 to Class 600) |
| Temperature Range | -196°C to +80°C (Typical for cryogenic service) |
| Body Material | Stainless Steel (SS304, SS316), Carbon Steel, Alloy |
| Seat & Seal Material | PTFE, Reinforced PTFE, PPL, Metal Seated (Fire-safe) |
| End Connection | Flanged (RF, RTJ), Threaded (NPT, BSP), Butt Weld |
| Operation | Lever, Gearbox, Pneumatic Actuator, Electric Actuator |
Choosing our cryogenic ball valve provides distinct advantages for your operations. The anti-static feature directly mitigates explosion risks in plants handling liquefied gases, contributing to a safer working environment and potentially lower insurance costs. The extended bonnet design drastically reduces maintenance frequency by protecting stem seals from thermal shock and freeze-up, leading to lower lifetime costs and less downtime. The availability of a fire-safe option adds a layer of protection for critical installations, potentially helping facilities comply with stricter safety regulations. Furthermore, the use of materials qualified for low temperatures ensures long-term integrity, preventing costly leaks or failures that can disrupt entire production chains. Finally, its compliance with the CB/T3191 standard offers assurance of a design that has been validated for cryogenic service within its specified parameters.
Our commitment to quality is demonstrated by our ISO9001 certification, which governs every stage of production from material sourcing to final testing. Since our establishment in 2016, Shanghai Zhibang Valve has built a reputation for reliability, exporting over a million dollars worth of valves annually to diverse markets including North America, Europe, Southeast Asia, and the Middle East. This global experience means we understand the specific requirements of different regions and industries. We support our clients with efficient logistics, shipping from major ports like Shanghai, Guangzhou, and Hong Kong. For your next cryogenic piping project, choose a valve that combines safety, durability, and proven performance. Contact us today to discuss your specifications, request a detailed quote, or learn more about how our CB/T3191 Cryogenic Ball Valve can be integrated into your system.
Frequently Asked Questions (FAQ)
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Q: What is the primary purpose of the anti-static design in this valve?
A: The anti-static design ensures electrical continuity to prevent static charge accumulation. When non-conductive fluids flow at high velocity, they can generate static electricity. This feature safely dissipates any charge to ground, eliminating a potential ignition source for flammable cryogenic media. -
Q: How low of a temperature can this valve reliably handle?
A: This valve is designed for cryogenic service, typically operating reliably down to -196°C (-321°F), which covers applications for liquefied gases like nitrogen, oxygen, argon, and LNG. The exact lower limit depends on the specific material grade selected. -
Q: Is the fire-safe option a standard feature or an extra?
A: The fire-safe construction is an available option. Standard valves come with soft seats (e.g., PTFE). The fire-safe version includes additional metal-seated or graphite seal arrangements that maintain sealing integrity in high-temperature emergency scenarios. -
Q: What kind of testing is performed on these cryogenic valves?
A> Valves undergo stringent testing which may include shell & seat pressure tests at room temperature, as well as cryogenic testing where the valve is cooled with liquid nitrogen and then tested for leakage and operational torque to simulate real-world conditions. -
Q: Can this valve be automated?
A: Yes, absolutely. The valve is designed to be compatible with various actuators. We can supply it as a manual valve (with lever or gear operator) or pre-assembled with a pneumatic or electric actuator package to suit your control system requirements. -
Q: What is the significance of the CB/T3191 standard?
A: CB/T3191 is a Chinese professional standard for "Cryogenic Valves." It specifies the design, manufacturing, testing, and inspection requirements for valves intended for low-temperature service, ensuring they meet defined criteria for materials, structure, and performance at cryogenic temperatures. -
Q: What is the typical delivery lead time for an order?
A: Lead time varies based on order quantity, size, material, and actuation requirements. Standard configurations may have shorter lead times, while customized orders require more. Please contact us with your specific needs for an accurate delivery schedule. -
Q: Do you provide technical support for sizing and selection?
A: Yes, our technical team can assist you with valve selection based on your fluid media, pressure, temperature, and pipeline data. We aim to ensure the valve is correctly specified for optimal and safe performance in your application.
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