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CB/T3191 Marine Ball Valve Cast Steel Body Floating Ball Design
Product Spotlights
CB/T3191-compliant marine ball valve featuring a robust cast steel body and reliable floating ball design for tight, bi-directional sealing. Ideal for seawater, fuel, and air systems on ships, it offers corrosion resistance, multiple operation options (manual/actuated), and customizable specifications. Manufactured under ISO9001 with global export experience.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Standard:
CB/T3191
Application:
Other, Marine and Shipbuilding Systems
Material:
Cast Steel Body
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Standard
CB/T3191
Application
Other, Marine and Shipbuilding Systems
Material
Cast Steel Body
Design
Floating Ball
Connection Type
Flanged (Standard), Others Optional
Operation
Manual Lever/Gearbox, Pneumatic/Hydraulic Actuation Optional
Seat Material
PTFE, Metal Seats Optional
Pressure Rating
PN16 to PN40 (Common), Higher Available
Size Range
DN15 to DN300 (Common)
As a dedicated manufacturer with ISO9001-certified processes since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance marine valves engineered for demanding environments. Our CB/T3191 Marine Ball Valve with a Cast Steel Body and Floating Ball Design represents our commitment to providing reliable, durable flow control solutions for the global maritime industry. Engineered to meet stringent shipbuilding standards, this valve is designed to ensure long-term, leak-free operation in critical marine applications, from ballast and bilge systems to fuel and cargo handling.
The valve's robust construction and intelligent design translate into significant benefits for shipbuilders, shipowners, and marine system integrators. Its reliability minimizes maintenance downtime, enhances system safety, and contributes to overall operational efficiency, making it a trusted component for vessels operating worldwide.
Core Features & Technical Advantages:
- CB/T3191 Standard Compliance: Manufactured in strict accordance with the Chinese Shipbuilding Standard CB/T3191, ensuring compatibility and performance acceptance within the marine industry.
- Robust Cast Steel Construction: The body is crafted from high-quality cast steel, offering excellent mechanical strength, impact resistance, and superior corrosion resistance compared to standard carbon steel, ideal for harsh marine atmospheres and fluid services.
- Floating Ball Design: Features a floating ball structure where the ball is not fixed to the stem. Under pressure, the ball is pushed against the seat ring, creating a reliable, bi-directional seal. This design is known for its simplicity, effectiveness, and suitability for a wide range of pressures.
- Advanced Seat Sealing: Standard seats are made from reinforced PTFE (Polytetrafluoroethylene), providing excellent chemical resistance, low friction, and reliable sealing. For high-temperature or abrasive services, metal-seated versions (e.g., stainless steel) are available upon request.
- Versatile End Connections: Typically supplied with flanged ends (e.g., ANSI, JIS, DIN standards) for secure, bolt-on installation in pipeline systems. Other connection types like threaded (NPT) or welded can be customized.
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Multiple Operation Options:
- Manual: Standard lever handle for quick quarter-turn operation. For larger sizes, a gearbox operator is available to reduce required torque.
- Actuated: Can be easily fitted with pneumatic (double-acting or spring-return) or hydraulic actuators for remote or automated control, integrating seamlessly into modern ship automation systems.
- Broad Application Scope: Specifically designed for seawater, fresh water, fuel oil, lubricating oil, compressed air, and other non-aggressive media on ships and offshore platforms.
Detailed Technical Specifications:
| Parameter | Specification / Option |
|---|---|
| Design & Manufacturing Standard | CB/T3191 |
| Body Material | Cast Steel (WCB, LCB, etc.) |
| Ball & Stem Material | Stainless Steel (304/316) or Chrome Plated |
| Seat Material (Standard) | Reinforced PTFE |
| Seat Material (Optional) | Metal (Stainless Steel, etc.) |
| Pressure Rating (Common) | PN16, PN25, PN40 (Class 150, 300) |
| Temperature Range (PTFE Seat) | -20°C to +180°C |
| Size Range (Nominal Diameter) | DN15 (1/2") to DN300 (12") |
| End Connection (Standard) | Flanged (RF, FF) |
| Operation | Lever, Gearbox, Pneumatic/Hydraulic Actuator |
| Fire Safe Design | Optional, compliant with API 607/API 6FA |
FAQ (Frequently Asked Questions):
-
Q: What is the main advantage of the floating ball design in this marine valve?
A: The floating ball design utilizes system pressure to enhance the sealing force. When closed, fluid pressure pushes the ball firmly against the downstream seat ring, creating a tight, bi-directional seal that is both simple in mechanism and highly reliable for a broad pressure range common in marine piping. -
Q: Can this CB/T3191 valve be used for seawater service?
A: Yes, it is well-suited for seawater applications. The combination of a corrosion-resistant cast steel body, stainless steel internals (ball/stem), and chemically inert PTFE seats provides excellent resistance to seawater corrosion and scaling. Specific material grades can be selected for optimal performance. -
Q: Are these valves certified for use on ships?
A: Our manufacturing facility holds ISO9001 certification, ensuring consistent quality control. The valves are produced to meet the CB/T3191 standard, which is widely recognized and accepted in shipbuilding. For specific project approvals (e.g., from classification societies like ABS, DNV, LR), please contact us with your requirements. -
Q: What is the typical lead time for an order?
A: Lead times vary based on order quantity, size, and material specifications. Standard configurations typically have shorter lead times. We maintain efficient production scheduling to meet our global clients' needs, with shipments available from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing. -
Q: Do you offer actuated versions for automated systems?
A: Absolutely. While supplied as standard with a manual lever, our valves are designed for easy integration with pneumatic (air) or hydraulic actuators. We can provide a complete package including the valve, actuator, and necessary accessories like limit switches and solenoid valves. -
Q: How does the pressure rating (PN16, PN25, etc.) correlate with different ship systems?
A: Different shipboard systems operate at different pressures. For example, ballast and general service water lines often use PN16/Class 150 valves. Higher-pressure applications like fuel oil supply or compressed air may require PN25/Class 300 or PN40 ratings. We can advise on the appropriate rating for your specific application. -
Q: Is customization available for non-standard sizes or materials?
A: Yes, as a manufacturer, we offer customization. This can include special sizes outside the standard range, alternative materials (e.g., duplex stainless steel for highly corrosive media), special coatings or painting per specifications, and different end connection standards. -
Q: What after-sales support do you provide?
A: We provide technical documentation, installation manuals, and spare parts support. Our experienced team is available to assist with technical queries and troubleshooting to ensure optimal valve performance throughout its service life.
Backed by nearly a decade of manufacturing expertise and an annual export value reflecting consistent global trust, Shanghai Zhibang has established itself as a reliable partner for marine valve solutions. Our products reach diverse markets across North and South America, Europe, Asia, Africa, and Oceania, proving their adaptability and reliability in various operating conditions. Choosing our CB/T3191 Marine Ball Valve means investing in a component built for durability, backed by ISO9001 quality assurance, and supported by a manufacturer committed to your project's success. We encourage you to contact us with your specific requirements for a detailed quotation or technical consultation to ensure the perfect valve solution for your marine application.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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