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CB/T3191 Reduced Bore Ball Valve Installation & Technical Support Available
Product Spotlights
ISO 9001 certified CB/T3191 standard reduced bore ball valves. Features compact, lightweight design for cost and space savings. Robust construction with carbon steel, stainless steel, or duplex steel options. Available with manual, gear, pneumatic, or electric actuation. Comprehensive installation and technical support provided. Suitable for oil & gas, chemical, power, and marine applications.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Application:
Other, Oil & Gas
Product Standard:
CB/T3191
Port Type:
Reduced Bore (Reduced Port)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Oil & Gas
Product Standard
CB/T3191
Port Type
Reduced Bore (Reduced Port)
Body Material
Carbon Steel, Stainless Steel, Duplex Steel
End Connection
Flanged (RF, RTJ), Threaded, Welded
Seat Material
PTFE, Reinforced PTFE, Metal
Pressure Rating
PN16, PN25, PN40, Class150, Class300
Operation Type
Lever, Gearbox, Pneumatic, Electric Actuator
Temperature Range
-20°C to 200°C (Standard), Customizable
Size Range
DN15 (1/2“) to DN600 (24“)
As a leading manufacturer with ISO 9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance industrial valves, including our premium CB/T3191 Reduced Bore Ball Valve. With years of expertise since our establishment in 2016, we understand the critical need for reliable, efficient, and durable flow control solutions in demanding applications. Our valves are engineered to offer superior shut-off capabilities, reduced pressure drop, and long service life, making them a cost-effective choice for your piping systems. We support our products with comprehensive technical guidance and installation assistance to ensure optimal performance from day one.
The CB/T3191 standard specifies the design, manufacturing, and testing requirements for marine and industrial ball valves. Our reduced bore (or reduced port) ball valves feature a ball with a bore diameter smaller than the pipeline's inner diameter. This design offers several distinct advantages for specific system requirements.
Core Design Features & Technical Advantages:
- Optimized Flow & Pressure Management: The reduced bore design creates a venturi effect, which can be beneficial for throttling applications or where a controlled pressure drop is required across the valve. It allows for better flow regulation compared to a full bore valve in certain scenarios.
- Compact & Lightweight Structure: Due to the smaller ball, the valve body, stem, and seats can be more compact. This results in a lighter overall valve, which simplifies handling, reduces structural support needs, and can lead to lower overall project costs.
- Enhanced Sealing & Durability: The smaller sealing surface area on the ball and seats can contribute to lower operating torque and potentially higher sealing integrity under high-pressure conditions. We use advanced seat materials like reinforced PTFE or metal for demanding services.
- Robust Construction: Manufactured from materials like WCB carbon steel, CF8/CF8M stainless steel, or duplex steels, these valves are built to withstand corrosive and high-pressure environments commonly found in our main export markets across North America, Europe, Asia, and Africa.
Technical Specifications Overview:
| Parameter | Specification / Options |
| Design Standard | CB/T3191 (Chinese Ship Standard, widely accepted industrially) |
| Bore Type | Reduced Port (typically ~80% of pipe ID) |
| Pressure Ratings | PN16, PN25, PN40; ANSI Class 150, Class 300 |
| Temperature Range (Standard) | -20°C to 200°C (Extended ranges available) |
| End Connections | Flanged (RF, RTJ), Threaded (NPT, BSP), Butt Weld |
| Operation | Manual Lever, Gear Operator, Pneumatic Actuator, Electric Actuator |
| Fire Safe Design | Available upon request (API 607/API 6FA compliant) |
| Anti-Static & Blow-Proof Stem | Standard feature for safety |
Benefits for Your Operations:
- Cost Efficiency: Lower initial investment and installation costs compared to full bore valves, without compromising on critical sealing performance for on/off service.
- Space Savings: Ideal for projects with space constraints due to their more compact design.
- Versatility: Suitable for a wide range of media including water, oil, gas, steam, and various chemicals, aligning with applications in power plants, chemical processing, shipbuilding, and water treatment facilities.
- Reliable Sourcing: With an annual export value demonstrating our global reach, we ensure consistent quality and reliable supply, supported by multiple shipment ports including Shanghai, Guangzhou, and Hong Kong.
Our Commitment & Your Assurance: Backed by our ISO 9001 certified manufacturing processes, every CB/T3191 Reduced Bore Ball Valve undergoes rigorous testing, including shell test, seat test, and operational torque checks, before leaving our facility. We don't just sell a product; we provide a solution package. Our offered Installation & Technical Support means you have direct access to our engineering team for layout advice, installation best practices, and troubleshooting. This commitment to post-sales service has made us a trusted partner for clients worldwide. Choose Shanghai Zhibang for a valve that combines proven design, robust manufacturing, and unwavering technical support.
Frequently Asked Questions (FAQ):
-
Q: What is the main difference between a reduced bore and a full bore ball valve?
A: A reduced bore valve has a ball opening (port) smaller than the pipeline's internal diameter, which creates a restriction and some pressure drop. A full bore valve has a port equal to the pipe ID, offering minimal flow restriction. The choice depends on whether you need minimal pressure loss (full bore) or a more compact/economic valve for on/off service where some pressure drop is acceptable (reduced bore). -
Q: Is the CB/T3191 standard only for marine use?
A: While CB/T is a Chinese standard series for ship equipment, the CB/T3191 ball valve standard is widely recognized and applied in general industrial sectors such as chemical, power, and oil & gas due to its stringent design and testing requirements, making it suitable for demanding land-based applications as well. -
Q: Can I get this valve with an actuator for remote operation?
A: Absolutely. We offer a variety of actuation options. The valve can be fitted with pneumatic (double-acting or spring-return) or electric actuators. Please specify your required torque, control signal (e.g., 4-20mA, on/off), and fail-safe mode when inquiring. -
Q: What materials are available for corrosive service?
A: For corrosive media, we recommend valve bodies in 304/316 stainless steel or duplex steel (2205). Seat materials can be PTFE, reinforced PTFE (RPTFE), or metal (e.g., stainless steel) for higher temperatures and abrasive services. The specific material combination should be selected based on your fluid composition and temperature. -
Q: Do you provide installation drawings and dimensional data?
A: Yes, comprehensive technical documentation is part of our support. We provide detailed dimensional drawings (face-to-face, flange dimensions), weight, and installation manuals upon request or with order confirmation to facilitate your engineering and installation planning. -
Q: What kind of warranty or after-sales service do you offer?
A: We provide a standard warranty against manufacturing defects. More importantly, our technical support is available to assist with installation guidance, operational queries, and maintenance recommendations throughout the valve's lifecycle. -
Q: Are these valves suitable for high-pressure steam applications?
A: Yes, with the correct material selection and pressure class. For steam service, we typically recommend carbon steel (WCB) or alloy steel bodies with metal-seated or high-grade PTFE seats suitable for the operating temperature. Ensure you specify the exact steam pressure and temperature for a proper recommendation. -
Q: What is the typical lead time for an order?
A: Lead times vary based on size, material, and quantity. Standard configurations in common sizes may have shorter lead times, while customized orders (special materials, actuators) require more. We provide estimated lead times with every quotation and strive to meet project schedules.
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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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