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CB/T3191 Manual Gear Marine Ball Valve With Lockable Handle for Offshore Platform Use
Product Spotlights
Designed for offshore safety with a lockable handle for secure LOTO procedures. Features a manual gear operator for easy handling of large valves under pressure. Constructed with marine-grade materials for corrosion resistance in harsh environments. Complies with CB/T3191 standards and offers customizable options for global project needs. Supports operational integrity and reduces long-term maintenance costs.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Offshore platforms
Material:
Carbon steel, stainless steel, or bronze
Connection Type:
Flanged, threaded, or welded ends
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Offshore platforms
Material
Carbon steel, stainless steel, or bronze
Connection Type
Flanged, threaded, or welded ends
Pressure Rating
PN16 to PN40 (or Class 150 to 300)
Temperature Range
-20°C to 200°C (-4°F to 392°F)
Operation Type
Manual gear with lockable handle
Lock Type
Padlock provision on handle
Seat Material
PTFE, reinforced PTFE, or metal
Standards
CB/T3191, GB, or other relevant marine standards
Optional Features
Gearbox protection cover, position indicator
As a leading manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our CB/T3191 Manual Gear Marine Ball Valve with Lockable Handle. Engineered specifically for the demanding environments of offshore platforms, this valve represents the culmination of our expertise in marine fluid control solutions. Since our establishment in 2016, we have dedicated ourselves to producing valves that meet the highest standards of performance and safety for global markets, including North America, South America, Europe, and Southeast Asia. This valve is designed to provide secure, reliable, and easy operation in critical applications where unauthorized access or accidental operation must be prevented. Its robust construction and specialized features make it an indispensable component for ensuring the integrity and safety of offshore piping systems.
Our CB/T3191 Manual Gear Marine Ball Valve is built to withstand the harsh conditions typical of offshore operations, including exposure to saltwater, high humidity, and variable pressures. The core of its design is the integration of a manual gear operator with a lockable handle, providing both mechanical advantage for easy operation and a critical security feature. This combination is essential for isolation valves on platforms, where specific lines must remain in a set position for safety or process reasons. The valve body is constructed from high-grade materials suitable for marine service, ensuring long-term corrosion resistance and structural integrity.
Key Technical Specifications and Design Advantages:
- Enhanced Security and Safety: The lockable handle is a paramount feature for offshore use. It allows for the valve to be secured in either the fully open or fully closed position using a standard padlock (not included). This prevents unauthorized or accidental operation, which is crucial for process safety management (PSM) and for locking out equipment during maintenance.
- Robust Gear Operation: The integrated manual gearbox provides a high mechanical advantage, making it possible to operate larger-sized valves (typically 8" and above) or valves under higher differential pressures with relative ease. This reduces operator effort and minimizes the risk of injury.
- Superior Sealing Performance: The valve utilizes advanced seat materials, such as PTFE or reinforced PTFE, which provide excellent sealing capabilities and low operating torque. This ensures bubble-tight shut-off, essential for preventing leaks in environmentally sensitive offshore areas.
- Corrosion-Resistant Construction: Available in materials like CF8M stainless steel (316 equivalent) or with specialized coatings for carbon steel bodies, the valve is engineered to resist pitting, crevice corrosion, and general degradation from salt spray and marine atmospheres.
- Durability in Harsh Environments: All external components, including the gearbox and handle, are designed with protection against the elements. Options like a gearbox cover shield the mechanism from salt, sand, and direct weather exposure, prolonging service life.
- Versatile End Connections: To facilitate integration into existing platform piping, the valve is offered with flanged ends (to ANSI/ASME or DIN standards), threaded ends, or butt-weld ends, providing flexibility for different system designs.
Detailed Technical Parameters Table:
| Parameter | Specification / Description |
|---|---|
| Design Standard | CB/T3191 (Chinese Ship Standard), design can also conform to GB, ANSI/ASME, or other standards upon request. |
| Nominal Diameter (DN) | Commonly available from DN50 (2") up to DN300 (12") or larger for specific projects. |
| Pressure Rating | PN16, PN25, PN40 (or Class 150, 300) to suit various system pressure requirements on platforms. |
| Body & Trim Materials | Body: WCB Carbon Steel, CF8 (304 SS), CF8M (316 SS). Ball & Stem: SS316, SS304. Seat: PTFE, RPTFE, PPL, Metal. |
| Operating Temperature | Standard: -20°C to 200°C. Special seat materials can extend this range for specific fluid services. |
| Handle/Gear Type | Manual gear operator with lockable lever handle. Gear ratio is optimized for low operating torque. |
| Fire Safe Design | Optional fire-safe design per API 607/API 6FA or ISO 10497 standards is available for critical services. |
| Paint/Coating | External epoxy coating or hot-dip galvanizing is available for enhanced corrosion protection in marine atmospheres. |
Benefits for Offshore Platform Operators:
- Operational Safety Compliance: The lockable handle directly supports compliance with offshore safety regulations requiring positive isolation and lock-out/tag-out (LOTO) procedures, reducing operational risk.
- Reduced Maintenance Costs: The robust design and corrosion-resistant materials lead to extended service intervals and lower total cost of ownership compared to standard valves not designed for marine duty.
- Improved Operational Efficiency: The gear operator allows a single worker to manage large valves safely, reducing manpower requirements and speeding up routine valve cycling operations.
- Reliable System Integrity: Consistent, leak-free performance ensures process fluid containment, protecting both the environment and platform personnel.
- Global Supply Chain Support: With major ports of shipment in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely and reliable delivery to offshore projects worldwide, minimizing downtime.
Frequently Asked Questions (FAQ):
-
Q: What is the main purpose of the lockable handle on this marine ball valve?
A: The lockable handle is a critical safety feature. It allows the valve to be physically secured in the open or closed position using a padlock. This is essential for implementing lock-out/tag-out (LOTO) procedures during maintenance and for preventing unauthorized or accidental operation that could compromise process safety on an offshore platform. -
Q: For what size valves is the manual gear operator typically required?
A: While it can be applied to smaller valves for security reasons, the manual gear operator is most commonly specified for ball valves with a nominal diameter of DN80 (3") and larger. The gearbox provides the mechanical advantage needed to overcome the high seat friction and fluid pressure forces present in larger valves, making them operable by hand. -
Q: Can this valve be used with seawater or other corrosive fluids?
A: Yes, absolutely. For seawater service or other corrosive media, we recommend specifying the valve with a body material of CF8M (AISI 316 stainless steel) or a higher-grade duplex stainless steel. Additionally, specialized internal trim and seat materials compatible with the specific fluid should be selected to ensure optimal service life. -
Q: Are these valves suitable for subsea applications or only topside?
A: The standard CB/T3191 valve described here is designed for topside (above-water) service on offshore platforms, ships, and marine terminals. For subsea applications, valves require radically different design considerations (pressure compensation, deep-sea corrosion protection, ROV interfaces) and are a separate product category. Please inquire if you have a subsea requirement. -
Q: What certifications do you hold for quality management?
A: Shanghai Zhibang Valve Manufacture Co., Ltd. operates under an ISO9001 Quality Management System. This certification underpins our consistent manufacturing processes, quality control checks, and traceability, ensuring every valve meets specified requirements. Product-specific certifications (e.g., for materials or fire testing) can be provided upon request. -
Q: Do you offer customization, such as different flange standards or special coatings?
A> Yes, customization is a key part of our service. We can manufacture valves to meet various international flange standards (ANSI, DIN, JIS, etc.). We also offer a range of external coatings, including high-performance epoxy paints and hot-dip galvanizing, to match the specific environmental conditions of your platform. Please provide your project specifications for a tailored quotation. -
Q: What is the typical lead time for an order of these valves?
A: Lead time depends on the order quantity, size, material specifications, and customization requirements. For standard configurations in common sizes, we often have stock or can offer competitive production lead times. We provide clear delivery schedules upon order confirmation to help with your project planning. -
Q: How does the CB/T3191 standard relate to other international standards like API or ISO?
A> CB/T is a Chinese national standard ("T" for recommended) commonly used for shipbuilding and marine equipment. It specifies requirements for design, materials, testing, and marking. The performance and dimensions of valves built to CB/T3191 are generally compatible with and can be designed to meet the functional requirements of international standards like API 608 or ISO 17292, which are often referenced in offshore projects. We can clarify compliance for your specific project needs.
Backed by our ISO9001-certified manufacturing processes and a proven track record of exporting to demanding markets across the globe—from North America and Western Europe to Southeast Asia and the Middle East—Shanghai Zhibang Valve provides not just a product, but a reliable partnership. Our annual export value reflects the trust placed in us by international clients for critical fluid control components. This CB/T3191 Manual Gear Marine Ball Valve with Lockable Handle embodies our commitment to engineering valves that enhance safety, ensure reliability, and withstand the test of time in the world's most challenging offshore environments. For your next platform project, upgrade, or maintenance package, contact us to discuss your specific requirements and experience the Zhibang difference in quality and service.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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