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Home > Industrial Equipment & Components > Valve > Butterfly Valve > DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa)

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa)

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) thumbnail-3

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) thumbnail-4

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) thumbnail-5

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) photo-1

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) photo-2

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) photo-3

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) photo-4

DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa) photo-5

Product Spotlights

DNV-certified marine ball valve engineered for extreme cryogenic service down to -196°C. Features threaded connections for easy installation and a robust PN4.0MPa pressure rating. Complies with CB/T3191 ship standard, ensuring reliability and safety in LNG handling and marine applications. Manufactured under ISO9001 with materials suited for ultra-low temperatures.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Marine Cryogenic Service

Standard:

CB/T3191 Standard

Material:

Stainless Steel (Body & Trim)

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Application Other, Marine Cryogenic Service

Standard CB/T3191 Standard

Material Stainless Steel (Body & Trim)

Connection Type Threaded (NPT/BSP)

Pressure Rating PN4.0 MPa

Temperature Range -196°C to +80°C

Certification DNV Marine Certification

Valve Type Ball Valve

Seat Material PTFE / Enhanced PTFE

Operation Manual Lever / Gearbox Optional

As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd specializes in providing high-performance fluid control solutions for demanding global industries. Our DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service represents our commitment to engineering excellence, designed specifically to handle ultra-low temperature media down to -196°C with reliable shut-off in marine and offshore applications. With an annual export value demonstrating our international reach, we ensure this valve meets the rigorous standards required by shipbuilders, LNG carriers, and cryogenic processing plants worldwide.

This cryogenic ball valve is engineered for superior performance in extreme environments. Its design prioritizes safety, durability, and leak-free operation, which are non-negotiable in marine service. The threaded connection ensures easy installation and maintenance, while the PN4.0MPa pressure rating provides robust performance under high-pressure conditions common in cryogenic systems.

Key Features & Technical Advantages:

Ultra-Low Temperature Resilience: Specifically designed and tested for continuous service at temperatures as low as -196°C (-320°F), making it ideal for handling liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, and other cryogenic fluids.
DNV Marine Certification: Manufactured in compliance with DNV (Det Norske Veritas) standards, providing assurance of quality, safety, and suitability for marine and offshore applications. This certification is highly recognized in the global maritime industry.
Robust Threaded Connection: Features NPT or BSP threaded ends as standard, ensuring a secure, pressure-tight seal and simplifying installation without the need for welding in many cases, which is crucial for maintenance and repair at sea.
High-Pressure Capability: Rated for PN4.0 MPa (approximately 580 psi), this valve can withstand the significant pressure fluctuations encountered in cryogenic storage and transfer systems.
Extended Stem Design: Incorporates an extended bonnet or stem design, a critical feature for cryogenic valves. This design prevents the packing from freezing and allows the valve to be operated safely even when the body is at extreme low temperatures.
Superior Seat & Seal Materials: Utilizes advanced polymer seats such as reinforced PTFE (Polytetrafluoroethylene) or other cryogenic-grade materials that retain elasticity and sealing properties at ultra-low temperatures, ensuring a bubble-tight seal.
Fire-Safe Design (Optional): Available with fire-safe features in accordance with API 607/API 6FA standards, where the valve maintains its sealing integrity for a specified duration under fire conditions, an essential safety feature for marine applications.
Anti-Static & Blow-Out Proof Stem: The stem is designed to be anti-static to prevent spark generation and is blow-out proof, ensuring operational safety when handling flammable cryogenic media.

Detailed Technical Specifications:

Parameter	Specification
Product Standard	CB/T3191 (Chinese Ship Standard)
Design & Certification	DNV Marine Certification
Pressure Rating	PN4.0 MPa (Class 600)
Temperature Range	-196°C to +80°C
Connection Type	Threaded (NPT or BSP available upon request)
Body Material	Stainless Steel 316/316L, CF8M
Ball Material	Stainless Steel 316, often chrome-plated for reduced friction
Seat Material	PTFE, Reinforced PTFE, or PEEK for cryogenic service
Stem Material	Stainless Steel 316 with anti-static device
Seal & Packing	Graphite or PTFE-based packing suitable for low temps
Operation	Manual Lever (Standard), Gear Operator or Actuator (Optional)
Flow Characteristic	Full Port or Reduced Port (customizable)

Benefits for Your Operations:

Enhanced System Safety: The DNV certification and cryogenic design provide a high level of operational safety, reducing the risk of leaks or failures in critical marine systems.
Reduced Maintenance & Lifetime Cost: Durable materials and precision engineering minimize wear, leading to longer service intervals and lower total cost of ownership.
Global Compliance: Adherence to CB/T3191 and DNV standards facilitates easier approval and integration into international shipbuilding and offshore projects.
Operational Reliability: Consistent performance under extreme thermal cycling ensures process stability and prevents unplanned downtime in LNG handling, chemical carriers, or gas processing.

Backed by our ISO9001 certified manufacturing processes, Shanghai Zhibang guarantees the consistent quality and performance of every cryogenic ball valve we produce. Our established presence in major global markets—from North America and Europe to Southeast Asia and the Middle East—and an annual export value reflecting strong international trust, underscore our capability to deliver reliable fluid control solutions. We support our products with flexible shipment options from key Chinese ports. Choosing our DNV Certified Cryogenic Ball Valve means selecting a component engineered for resilience, certified for safety, and proven in demanding marine applications worldwide. Contact us today to discuss how this valve can meet your specific project requirements.

Frequently Asked Questions (FAQ):

Q: What does "DNV Certified" mean for this valve?
A: DNV (Det Norske Veritas) certification signifies that the valve has been designed, manufactured, and tested according to the stringent rules and standards set by DNV for marine and offshore applications. It provides assurance of quality, material traceability, and fitness for purpose in ship systems, which is often a mandatory requirement for marine projects.
Q: Can this valve be used for LNG service?
A: Yes, absolutely. Its design temperature of -196°C makes it suitable for handling liquefied natural gas (LNG), which is typically stored at around -162°C. The extended bonnet, cryogenic-grade seals, and anti-static features are specifically beneficial for LNG applications.
Q: Are the threaded connections NPT or BSP?
A: We can supply the valve with either NPT (American National Pipe Thread) or BSP (British Standard Pipe) threads based on your project specifications and regional standards. Please specify your requirement when inquiring.
Q: Is this valve fire-safe?
A: A fire-safe design is available as an optional feature. This means the valve is engineered to maintain sealing capability for a defined period even when exposed to fire, a critical safety enhancement for offshore and marine environments. Details on compliance standards (e.g., API 607) can be provided upon request.
Q: What is the lead time for an order?
A: Lead times vary based on order quantity, configuration (standard vs. customized), and current production schedule. Generally, for standard configurations, we aim for efficient turnaround. We provide specific lead time estimates with every formal quotation.
Q: Do you provide documentation like material certificates and test reports?
A: Yes, we provide comprehensive documentation packages, which can include material test certificates (MTC), factory test reports (pressure tests, cryogenic tests), and certificates of conformity. This documentation is essential for project traceability and quality audits.
Q: Can the valve be equipped with an actuator?
A: Yes, the valve can be supplied as a manual version or prepared for the installation of pneumatic, hydraulic, or electric actuators. We can also source and pre-assemble the actuator package for you as a complete unit.
Q: What is the main difference between CB/T3191 and other valve standards like API or ANSI?
A: CB/T3191 is a Chinese national standard specifically developed for shipbuilding, covering dimensions, materials, testing, and marking requirements for marine valves. While it shares many common engineering principles with API and ANSI standards, it is tailored to meet the specific regulatory and operational needs of the maritime industry, particularly in Asia and for vessels built to Chinese class rules.