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Help CenterCB/T3191 Duplex Stainless Steel Ball Valve, Factory Direct With Technical Support Available
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, is a dedicated manufacturer specializing in high-performance valves for demanding industrial applications. We proudly offer our CB/T3191 Duplex Stainless Steel Ball Valve directly from our factory, backed by comprehensive technical support. This valve is engineered to deliver exceptional reliability and longevity in corrosive and high-pressure environments, combining the superior strength and corrosion resistance of duplex stainless steel with the precise requirements of the CB/T3191 marine standard. Our direct manufacturing approach ensures competitive pricing, consistent quality control, and the flexibility to cater to your specific project needs.
Our Duplex Stainless Steel Ball Valve is designed to meet the rigorous challenges faced in sectors such as shipbuilding, offshore platforms, chemical processing plants, and oil & gas pipelines. Its robust construction ensures safe and efficient fluid control where failure is not an option.
- Superior Material Performance: Constructed from duplex stainless steel (grades 2205 or 2507), this valve offers a unique combination of high strength and excellent corrosion resistance, particularly against chloride-induced stress corrosion cracking (SCC), making it ideal for seawater, chemical, and sour service applications.
- Compliance with Marine Standard: Manufactured in accordance with the Chinese marine standard CB/T3191, ensuring the valve meets specific requirements for design, materials, testing, and performance suitable for marine and offshore use.
- Robust Structural Design: Available in two-piece or three-piece body configurations with flanged connections (RF or RTJ), providing flexibility for installation and maintenance. The design ensures minimal pressure drop and high flow capacity.
- Versatile Operation and Actuation: Standard manual operation via lever is available. For remote or automated control, options include gear operators, pneumatic actuators, or electric actuators, allowing integration into complex control systems.
- Enhanced Sealing Solutions: Seats are typically made from PTFE for excellent sealing and low friction, with metal-reinforced or fire-safe seat designs available for applications requiring higher temperature resistance or fire safety certification.
- Wide Size and Pressure Range: The valve is produced in a comprehensive size range from DN15 (1/2") to DN300 (12") and can handle pressure ratings from PN16 to PN40 (or Class 150 to Class 300), catering to diverse pipeline specifications.
Below is a table summarizing key technical specifications for our standard product line:
| Parameter | Specification / Range |
|---|---|
| Body Material | Duplex Stainless Steel (UNS S32205 / S32750) |
| Design Standard | CB/T3191 |
| Connection Type | Flanged (RF, RTJ), Threaded ends optional |
| Size Range (Nominal Diameter) | DN15, DN20, DN25, DN40, DN50, DN80, DN100, DN150, DN200, DN250, DN300 |
| Pressure Rating | PN16, PN25, PN40 (or ANSI Class 150, 300) |
| Temperature Range | -20°C to +200°C (Standard PTFE seats), Higher with metal seats |
| Seat Material | PTFE (Standard), PEEK, Metal Reinforced, Fire-safe |
| Operation Mode | Manual Lever, Gear Operator, Pneumatic/ Electric Actuator (Optional) |
| Body Style | Two-piece, Three-piece |
The advantages of choosing our CB/T3191 Duplex Stainless Steel Ball Valve extend beyond its technical specifications:
- Long Service Life & Reduced Maintenance: The duplex steel's resistance to pitting, crevice corrosion, and erosion significantly reduces wear and failure rates, leading to lower lifetime maintenance costs and increased system uptime.
- Cost-Effectiveness: While offering performance comparable to more expensive alloys like nickel-based ones in many corrosive environments, duplex steel provides a more economical solution, offering excellent value.
- Safety and Reliability: Compliance with the CB/T3191 standard and optional fire-safe design contribute to safer operations in critical applications, protecting assets and personnel.
- Factory Direct Benefits: Purchasing directly from us, Shanghai Zhibang, eliminates intermediary markups. You gain access to expert technical support for selection, installation, and troubleshooting, and can request customizations like special coatings, extended stems, or unique pressure ratings.
Shanghai Zhibang Valve Manufacture Co., Ltd. has built a solid reputation since 2016, supported by our ISO9001 quality management system certification, which underpins our consistent manufacturing processes. With an annual export value ranging between US$1 Million and US$1.5 Million, our products have proven their reliability across diverse global markets including North America, South America, Europe, Southeast Asia, Africa, and the Middle East. Our valves are shipped from major ports like Shanghai, Guangzhou, Hongkong, and Beijing, ensuring efficient logistics. This track record demonstrates our capability to deliver high-quality, standard-compliant valves that meet the exact needs of international industrial clients. Trust in our expertise and direct manufacturing model to provide you with a Duplex Stainless Steel Ball Valve that enhances the durability, safety, and efficiency of your fluid control systems. Contact us today for a quotation or to discuss your specific technical requirements.
Frequently Asked Questions (FAQ)
Q1: What is duplex stainless steel, and why is it used for this valve?
A: Duplex stainless steel is a family of steels with a mixed microstructure of austenite and ferrite. This gives it higher strength than standard austenitic stainless steels (like 304/316) and significantly better resistance to corrosion, especially chloride-induced stress corrosion cracking. It is chosen for this valve to withstand aggressive environments like seawater, chemical processes, and sour oil & gas service.
Q2: What does the "CB/T3191" standard signify?
A: CB/T3191 is a Chinese national standard specifically for marine valves. It specifies requirements for design, materials, manufacturing, testing, and marking of valves intended for use on ships and offshore structures. A valve marked with CB/T3191 complies with these marine industry requirements.
Q3: Can this valve be used in fire-safe applications?
A: Yes, we offer fire-safe design options. This typically involves metal-reinforced seats or secondary metal seals that maintain sealing integrity for a specified time under high-temperature conditions, such as during a fire. This feature is available upon request.
Q4: What actuation options are available besides manual operation?
A: For automated or remote control, we can provide gear operators for easier manual handling of larger valves, pneumatic actuators, or electric actuators. The specific type can be selected based on your available power source and control system requirements.
Q5: What is the typical size and pressure range available?
A: Our standard range covers nominal diameters from DN15 (1/2 inch) to DN300 (12 inches). Pressure ratings typically range from PN16 to PN40 (or equivalent ANSI Class 150 to Class 300). Specific sizes and pressures outside this range may be customizable.
Q6: Are there different seat material options?
A: The standard seat material is PTFE, offering good sealing and low operating torque. For higher temperature resistance or abrasive media, options like PEEK or metal-reinforced seats are available. Fire-safe seats are also an option.
Q7: What are the benefits of buying directly from the manufacturer?
A: Buying factory-direct typically offers more competitive pricing, direct access to technical expertise for support and customization, tighter quality control oversight, and often shorter lead times as communication flows directly without intermediaries.
Q8: What certifications does your company hold?
A: Our manufacturing processes are certified under the ISO9001 Quality Management System. This ensures consistent quality in our production. Other specific product certifications (like fire-safe approvals) can be provided based on the valve configuration ordered.
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