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Help CenterCB/T3191 Cast Steel Ball Valve Gear Operated Flanged Connection
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As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve is proud to present our CB/T3191 Cast Steel Ball Valve with Gear Operated and Flanged Connection. Engineered for demanding industrial applications, this valve combines robust construction with reliable performance, offering superior flow control and long service life in critical piping systems. With over 8 years of manufacturing expertise and a global presence across North America, South America, Europe, Asia, and Africa, we deliver valves that meet the stringent requirements of various industries, ensuring operational safety and efficiency for our clients worldwide.
Our CB/T3191 series ball valve is designed for high-pressure and high-temperature applications where manual operation requires significant torque. The gear operator provides mechanical advantage, making it possible to open and close large-diameter valves with relative ease, enhancing operator safety and reducing maintenance efforts. The flanged connection ensures a secure and leak-proof interface with the pipeline, simplifying installation and maintenance procedures.
Key Features and Technical Advantages:
- Robust Cast Steel Body: Manufactured from ASTM A216 WCB carbon steel, the valve body offers excellent strength and durability, capable of withstanding high pressures and mechanical stresses.
- Efficient Gear Operation: The enclosed worm gear mechanism provides a high reduction ratio, allowing for smooth and effortless operation even under high differential pressures. The gearbox is sealed to prevent ingress of contaminants.
- Superior Sealing Performance: Features multiple sealing points, including primary PTFE/RPTFE seats and secondary metal-to-metal seals (fire-safe design), ensuring bubble-tight shut-off and compliance with API 607/6FA standards.
- Versatile Application Range: Suitable for a wide spectrum of media including water, oil, gas, steam, and corrosive chemicals, making it ideal for petrochemical, power generation, marine, and water treatment industries.
- Low Maintenance Design: The stem is designed with a blow-out-proof structure and anti-static device. The self-lubricating bearings and seals minimize friction and wear, extending maintenance intervals.
- Customizable Configurations: Available with various trim materials, end connections (RF, RTJ), and actuator mounting pads for automation integration upon request.
Technical Specifications Table:
| Parameter | Specification |
| Design & Manufacturing Standard | CB/T3191, API 6D, API 608, ASME B16.34 |
| Pressure-Temperature Rating | ASME B16.34, Class 150 & Class 300 |
| Size Range (Nominal Diameter) | DN50 (2") to DN600 (24") |
| Body Material | ASTM A216 WCB (Standard), LCB, WC6, WC9, C5, CF8, CF8M available |
| Ball & Stem Material | AISI 420 / 304 / 316 Stainless Steel, Chrome Plated |
| Seat & Seal Material | PTFE, Reinforced PTFE, PPL, Metal (Fire Safe) |
| Operation Temperature | -29°C to 425°C (Standard), Extended ranges customizable |
| End Connection | Flanged: RF (Raised Face), RTJ (Ring Type Joint) per ASME B16.5 |
| Gear Operator Ratio | Customizable (e.g., 20:1, 30:1) based on torque requirements |
| Leakage Class | API 598 / MSS-SP-61, Fire Test per API 607/6FA |
Benefits for Your Operations: Choosing our gear operated flanged ball valve translates into tangible operational benefits. The reliable sealing minimizes product loss and environmental risks. The gear operator reduces the manpower and time required for valve cycling, improving overall plant efficiency. Its durable construction lowers the total cost of ownership by reducing replacement frequency and unplanned downtime. Furthermore, its compliance with international design standards ensures compatibility and safety in global projects.
Backed by our company's commitment to quality and a proven track record of exporting over US$1 million in valves annually to markets worldwide, you can trust Shanghai Zhibang Valve as a reliable partner. Our strategic shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing ensure flexible and timely logistics. We invite you to experience the reliability and performance of our CB/T3191 Cast Steel Ball Valves. Contact our technical sales team today to discuss your specific application requirements, request detailed drawings, or obtain a competitive quotation tailored to your project needs.
Frequently Asked Questions (FAQ):
Q1: What is the main advantage of a gear-operated ball valve over a hand-lever operated one?
A1: A gear operator provides a significant mechanical advantage (gear reduction), allowing an operator to open or close the valve with much less effort, especially for larger sizes (e.g., above 8") or under high pressure. This enhances safety, reduces operator fatigue, and ensures reliable operation in difficult conditions.
Q2: Can this valve be used for both on/off service and throttling control?
A2: While primarily designed for reliable on/off (isolation) service, the gear operator allows for more precise positioning compared to a quick-acting lever. Therefore, it can be used for basic throttling in some applications. However, for precise flow control, a control valve with a characterized trim is recommended.
Q3: What does "Fire Safe" design mean, and is it standard?
A3: A fire-safe design means the valve incorporates secondary metal-to-metal seals (usually between the ball and body). In the event of a fire where the primary soft seats (like PTFE) melt, these metal seals engage to maintain a seal and prevent catastrophic leakage. API 607/6FA fire-safe certification is a common optional feature for critical services like oil and gas.
Q4: What flange standards and facing types are available?
A4: The valves are manufactured with flanges conforming to ASME B16.5 Class 150 and 300. The standard facing is Raised Face (RF). Ring Type Joint (RTJ) flanges are also available upon request to match specific pipeline requirements.
Q5: Is the gear operator suitable for future automation?
A5: Yes. Our gear-operated valves are designed with a standardized mounting interface (square drive). This allows for easy retrofitting with electric or pneumatic actuators in the future if automated operation is required, protecting your investment.
Q6: What is the typical lead time for an order of these valves?
A6: Lead time depends on the size, material specifications, and order quantity. Standard configurations in common sizes may have shorter lead times. We recommend contacting our sales team with your specific requirements for an accurate production and delivery schedule.
Q7: What kind of testing is performed on the valves before shipment?
A7: Each valve undergoes rigorous testing including hydrostatic shell and seat tests per API 598 or MSS-SP-61 standards. This ensures the valve body integrity and seat tightness under pressure. Additional tests like fire testing or NDE can be performed as per customer specifications.
Q8: Do you provide technical support and documentation?
A8> Absolutely. We provide comprehensive documentation including material test certificates, inspection reports, dimensional drawings, and installation/maintenance manuals. Our engineering team is also available to provide application support.
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