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Help CenterCB/T3191 Low Temperature Marine Ball Valve With Stainless Steel Body for LNG Systems (-196°C, DN15-DN80, PN1.6-4.0MPa)
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As a specialized manufacturer with a focus on precision engineering, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents its CB/T3191 series Low Temperature Marine Ball Valve. Engineered specifically for the demanding environments of LNG (Liquefied Natural Gas) systems and marine applications, this valve represents a critical component where reliability under extreme cold is non-negotiable. Our commitment, backed by ISO9001 certified manufacturing processes since our establishment in 2016, ensures that each valve delivers consistent performance, safety, and longevity, supporting the global energy and shipping sectors we serve across five continents.
This valve is designed to operate seamlessly at cryogenic temperatures as low as -196°C, making it an ideal choice for LNG storage, transportation, and bunkering systems. Its robust stainless steel construction provides excellent resistance to corrosion and thermal stress, ensuring integrity over long service periods. The full port design minimizes pressure drop, facilitating efficient fluid transfer, which is crucial for operational economy in large-scale industrial and marine settings.
- Superior Cryogenic Performance: The valve features specially selected and treated materials for the ball, stem, and seats to prevent embrittlement and maintain sealing integrity at ultra-low temperatures. Advanced stem extension design minimizes heat transfer to the operating mechanism.
- Robust Construction & Safety: The stainless steel body offers high strength and excellent resistance to corrosion from seawater and LNG. A fire-safe design (optional) provides an additional layer of protection in case of emergency.
- Versatile Sizing and Pressure Options: Available in a comprehensive range from DN15 to DN80 and pressure classes PN1.6 to PN4.0 MPa, allowing for precise matching to your specific pipeline requirements.
- Flexible Actuation: While supplied as a standard manual valve with a lever or gearbox, it can be easily fitted with pneumatic, hydraulic, or electric actuators for remote or automated control, enhancing operational efficiency.
- Leak-Proof Design: Features a double-seal system (primary and secondary seals) and a blow-out-proof stem to ensure zero leakage to the atmosphere, critical for handling volatile and expensive cryogenic fluids.
Below is a summary of key technical specifications:
| Parameter | Specification |
|---|---|
| Design Standard | CB/T3191 |
| Body Material | Stainless Steel (CF8M/316 equivalent typical) |
| Ball & Stem Material | Stainless Steel with Low-Temp Treatment |
| Seat Material | Reinforced PTFE or PEEK (Cryogenic Grade) |
| Temperature Range | -196°C to +80°C (Non-cryogenic service) |
| Size Range (DN) | 15, 20, 25, 32, 40, 50, 65, 80 |
| Pressure Rating (PN) | 1.6, 2.5, 4.0 MPa |
| Connection | Flanged (RF/FF), Threaded (NPT/BSP) optional |
| Leakage Class | ANSI/FCI 70-2 Class VI (Bubble-tight) |
Frequently Asked Questions (FAQ)
Q1: What makes this valve suitable for LNG applications at -196°C?
A1: It is specifically designed per the CB/T3191 standard for cryogenic service. Key components like the ball, stem, and seats are made from materials selected and treated to resist extreme thermal contraction and embrittlement, ensuring reliable operation and seal integrity at LNG temperatures.
Q2: Can this valve be used in marine environments?
A2: Absolutely. The stainless steel body provides excellent corrosion resistance against seawater and marine atmospheres. Its robust construction meets the demands of offshore and shipboard installations for LNG carriers and bunkering systems.
Q3: What types of end connections are available?
A3: The standard configuration is with flanged ends (RF or FF face). However, threaded ends (NPT or BSP) or other special connections can be provided as a customizable option to suit your existing pipeline design.
Q4: Is the valve fire-safe?
A4: A fire-safe design is available upon request. This includes secondary metal seals that maintain sealing capability in the event of a fire, protecting personnel and assets.
Q5: Can I automate this valve?
A5: Yes. The valve is designed to be easily fitted with a variety of actuators, including pneumatic, hydraulic, or electric types. This allows for integration into automated control systems for remote operation.
Q6: What is the lead time for an order?
A6: Lead times vary based on order quantity, size, and specific configuration (like actuation). Standard sizes are typically available from stock or have shorter lead times. We provide accurate delivery schedules upon receipt of your detailed inquiry.
Q7: Do you provide certification documents?
A7> Yes. As an ISO9001 certified manufacturer, we can provide material certificates, pressure test reports, and other relevant inspection documents with the shipment to ensure full traceability and compliance.
Q8: What are your main export markets?
A8: We have extensive export experience, with our products successfully supplied to markets including North America, Europe, Southeast Asia, the Middle East, and Africa. We ship primarily from major Chinese ports like Shanghai, Guangzhou, and Hong Kong.
Trust in a product backed by nearly a decade of manufacturing expertise and a global track record. With an annual export value ranging between US$1-1.5 million and a presence across diverse international markets, Shanghai Zhibang has proven its capability to deliver reliable, high-performance valve solutions. Our CB/T3191 Low Temperature Marine Ball Valve is engineered not just to meet specifications, but to exceed expectations in the most challenging cryogenic applications. Contact us today to discuss how this valve can enhance the safety and efficiency of your LNG or marine system.
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