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Help CenterCB/T3191 Flanged Ball Valve, 304 Stainless Steel Body, Fire-Safe Design Option
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As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our premium CB/T3191 Flanged Ball Valve. Engineered for demanding industrial applications, this valve combines the superior corrosion resistance of 304 stainless steel with a robust flanged design for secure, leak-proof piping connections. The optional fire-safe design provides an added layer of safety and compliance for critical systems in hazardous environments. Trusted by clients across North America, Europe, Southeast Asia, and beyond, our valves are built to deliver reliable performance and long-term durability.
Our flanged ball valve is designed to meet the rigorous requirements of various industries. Below are its key features and technical advantages:
- Superior Construction: The valve body is crafted from high-grade 304 stainless steel, offering excellent resistance to corrosion, erosion, and a wide range of chemicals, ensuring longevity even in harsh conditions.
- Reliable Sealing: Utilizes advanced seat materials such as PTFE or reinforced PTFE for standard service, and metal seats for the fire-safe option. This design ensures bubble-tight shut-off and maintains integrity under varying pressure and temperature.
- Robust Flanged Ends: The flanged connection conforms to standard dimensions (ASME B16.5, DIN, etc., available upon request), facilitating easy installation, maintenance, and a secure fit that minimizes vibration and stress on the pipeline.
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Versatile Operation: Available with multiple actuation methods to suit different automation needs:
- Manual operation via lever or gearbox.
- Pneumatic actuation for quick on/off control.
- Electric actuation for integration into control systems.
- Fire-Safe Option: The fire-safe design is tested to relevant standards (e.g., API 607, API 6FA). In case of fire, the secondary metal seat provides a secondary seal, preventing catastrophic failure and containing the fluid, which is crucial for oil & gas, chemical, and marine applications.
- Wide Pressure & Temperature Range: Engineered to perform consistently across a broad spectrum of operating conditions.
The following table outlines typical technical specifications. Please note that specific parameters can be customized based on your project requirements.
| Parameter | Specification / Option |
|---|---|
| Design Standard | CB/T3191 |
| Body Material | 304 Stainless Steel (CF8M) |
| Connection Type | Flanged (RF, FF, RTJ available) |
| Nominal Pressure (PN) | PN16, PN25, PN40 (Higher ratings customizable) |
| Nominal Size (DN) | DN15 (1/2") to DN300 (12") |
| Temperature Range | Standard: -20°C to +200°C With special seats: Up to +400°C (optional) |
| Fire-Safe Design | Optional (API 607 / API 6FA type tests) |
| Actuation | Lever, Gearbox, Pneumatic, Electric (Optional) |
Choosing our valve brings concrete benefits to your operations. The 304 stainless steel construction drastically reduces maintenance costs and downtime associated with corrosion. The flanged design simplifies installation and system modifications. Most importantly, the fire-safe option enhances plant safety, helps meet stringent insurance and regulatory requirements, and protects both personnel and assets. Its versatility makes it suitable for on/off and throttling services in water, steam, oil, gas, and chemical lines.
With an established history since 2016 and an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang has proven its capability to deliver quality industrial valves to a global clientele spanning North America, South America, Europe, Asia, Africa, and Oceania. Our ISO9001 certified manufacturing process ensures every CB/T3191 Flanged Ball Valve meets consistent quality standards. Shipping from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure efficient and reliable logistics. This valve embodies our commitment to providing durable, safe, and high-performance flow control solutions. Contact us today to discuss your specific requirements or to request a detailed quotation.
Frequently Asked Questions (FAQ)
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Q: What does the "CB/T3191" standard refer to?
A: CB/T3191 is a Chinese professional standard for marine flanged steel ball valves. It specifies requirements for design, materials, pressure-temperature ratings, testing, and marking for valves used in marine and offshore applications. Valves manufactured to this standard are known for their robustness and reliability. -
Q: Is 304 stainless steel suitable for seawater applications?
A: While 304 stainless steel offers good general corrosion resistance, for prolonged exposure to seawater or chlorides, we often recommend 316 stainless steel or higher grades (like duplex) for superior pitting and crevice corrosion resistance. This can be provided as a customization. -
Q: How does the fire-safe option work?
A: In a fire-safe design, the primary soft seal (e.g., PTFE) provides normal sealing. In a fire event, the soft seal may degrade, but a secondary metal-to-metal seal engages, providing a leak-tight closure to prevent fluid release and contain the fire hazard, meeting specific performance test standards. -
Q: Can this valve be used for throttling flow control?
A: Ball valves are primarily designed for on/off service. While they can be used for moderate throttling, prolonged throttling in a partially open position can cause erosion of the ball and seats, especially with abrasive fluids. For precise flow control, a different valve type (like a globe valve) might be more suitable. -
Q: What flange standards and face types are available?
A: We can supply flanges according to common standards such as ASME B16.5 (ANSI), DIN, JIS, and GB. Common face types include Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ). Please specify your requirement during inquiry. -
Q: Do you provide actuators with the valve?
A: Yes, we offer a complete package. The valve can be supplied as a manual unit (lever/gearbox) or pre-assembled with pneumatic (double-acting or spring-return) or electric actuators. Our technical team can help select the right actuator based on your torque, speed, and control signal requirements. -
Q: What is the typical delivery time for an order?
A: For standard sizes and configurations from our inventory, lead time can be relatively short. For customized orders (special materials, fire-safe design, actuation), typical production lead time ranges from 4 to 8 weeks, depending on order complexity and quantity. -
Q: What testing is performed on the valves before shipment?
A> Every valve undergoes rigorous testing, which typically includes shell test (hydrostatic pressure test), seat leakage test (usually per API 598 or equivalent), and operational test. Fire-safe valves undergo additional testing as per the specified fire-test standard. Certificates are available upon request.
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