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Help CenterCB/T3191 Approved Duplex Steel Ball Valve for High Pressure Saltwater Service, 6.4MPa Rating
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As a dedicated manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our CB/T3191 Approved Duplex Steel Ball Valve, engineered specifically for demanding high-pressure saltwater applications. Since our establishment in 2016, we have focused on delivering robust and reliable fluid control solutions, with our products successfully exported to markets worldwide, including North America, Europe, and Southeast Asia. This valve represents our commitment to combining advanced metallurgy with precise engineering, offering exceptional resistance to corrosion, erosion, and high stress in challenging marine and offshore environments. Its 6.4MPa pressure rating ensures dependable performance in critical systems where failure is not an option.
This valve is designed to excel where others falter. Its core construction utilizes Duplex Stainless Steel, a material renowned for its superior strength and chloride stress corrosion cracking (SCC) resistance compared to standard stainless steels. This makes it an ideal choice for saltwater, brine, and other aggressive media. The valve is manufactured in strict compliance with the Chinese CB/T3191 standard, ensuring dimensional interchangeability, material integrity, and performance reliability for marine and industrial applications.
Key Features & Technical Advantages:
- Superior Corrosion & Erosion Resistance: The duplex steel body, stem, and ball provide outstanding resistance to pitting, crevice corrosion, and erosion caused by high-velocity saltwater, significantly extending service life.
- High Structural Integrity: With a pressure rating of 6.4 MPa (PN64), the valve is built to withstand high-pressure surges and continuous operation in demanding service conditions.
- Bubble-Tight Shut-off: Features precision-machined ball and seats (typically PTFE or reinforced PTFE) to ensure reliable, zero-leakage sealing, even after numerous cycles.
- Full Bore Design: Minimizes pressure drop across the valve, allowing for efficient fluid flow and reducing pumping energy costs in pipeline systems.
- Robust Operation: Available with a standard manual lever or an optional gearbox for easier operation in high-pressure settings. The stem is designed with an anti-blowout feature for enhanced safety.
- Versatile Application Readiness: Suitable for a wide range of services beyond saltwater, including seawater cooling systems, offshore oil & gas, chemical injection, and desalination plants.
Primary Technical Specifications:
| Parameter | Specification |
| Design & Manufacturing Standard | CB/T3191 |
| Pressure Rating (PN) | 64 (6.4 MPa) |
| Valve Size Range | DN15 to DN300 (Customizable) |
| Connection Standard | Flanged as per GB, ANSI, JIS, DIN (Specify) |
| Temperature Range | -29°C to 200°C (Seat dependent) |
| Body & Trim Material | Duplex Stainless Steel (e.g., UNS S31803/S32205) |
| Seat & Seal Material | PTFE, Reinforced PTFE, PPL (Available upon request) |
| Operation | Lever, Gear Operator, Pneumatic/Hydraulic Actuator (Optional) |
Benefits for Your Operations: Choosing our duplex steel ball valve translates to tangible operational advantages. You gain a component that reduces maintenance frequency and downtime due to its corrosion-resistant nature. Its high-pressure capability allows for system design flexibility and safety margin. The long service life in harsh environments leads to a lower total cost of ownership. Furthermore, compliance with the CB/T3191 standard provides assurance of quality and suitability for marine applications, facilitating smoother project approvals and installations.
Backed by our ISO9001 certification and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang Valve stands as a reliable partner. Our annual export value reflects the trust of global clients across continents from North America to Oceania. We support flexible shipment from major ports like Shanghai and Guangzhou. This CB/T3191 Duplex Steel Ball Valve is more than just a product; it's a engineered solution for reliability under pressure. For your next high-pressure saltwater, offshore, or corrosive service project, choose a valve built to last. Contact us today for a detailed quotation, technical data sheets, or to discuss your specific application requirements.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of using Duplex Steel over 316 Stainless Steel for saltwater service?
A: Duplex stainless steel offers approximately twice the yield strength and significantly better resistance to chloride stress corrosion cracking (SCC) and pitting corrosion compared to standard 316 stainless steel. This makes it far more suitable for high-pressure, high-chloride environments like seawater systems. -
Q: Is this valve suitable for offshore platform applications?
A: Yes, absolutely. Its design compliant with CB/T3191 (a marine standard), high-pressure rating, and duplex steel construction make it a preferred choice for various offshore oil & gas, seawater cooling, and firewater system applications on platforms and FPSOs. -
Q: Can you provide valves with different end connections besides flanged?
A: While flanged ends are standard for this pressure class and application, other connection types such as butt-weld or socket-weld can be discussed and manufactured as a custom order based on your specific pipeline design requirements. -
Q: What is the typical delivery lead time for an order?
A: Lead times vary based on order quantity, size, and specific configuration. For standard sizes and materials, we generally maintain competitive lead times. Please inquire with your required specifications for an accurate schedule. -
Q: Do you offer actuated versions of this valve?
A: Yes, we can equip this duplex steel ball valve with pneumatic, hydraulic, or electric actuators for remote or automated operation. Actuator selection depends on your available power source and control requirements. -
Q: How does the CB/T3191 standard compare to international standards like API or ISO?
A: CB/T3191 is a Chinese national standard specifically for marine valves. It specifies requirements for materials, design, pressure-temperature ratings, and testing that are comparable and often aligned with international norms, ensuring the valve's fitness for purpose in marine environments. -
Q: What kind of testing do these valves undergo before shipment?
A: Each valve undergoes rigorous factory acceptance testing, which typically includes shell strength test, seat leakage test, and operational torque check, in accordance with the requirements of the CB/T3191 standard or as specified by the customer. -
Q: Is fire-safe design available for this valve model?
A: Fire-safe design, featuring secondary metal sealing, is an available option for applications where fire safety is a critical consideration, such as in offshore hydrocarbon service.
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