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Help Center316 Stainless Steel Marine Ball Valve For Compressed Air, CB/T3191 Standard, Threaded Connection
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As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our premium 316 Stainless Steel Marine Ball Valve, engineered specifically for demanding compressed air applications in marine and industrial environments. Our commitment to quality, backed by an ISO9001 certified management system, ensures that every valve delivers reliable performance, durability, and safety, meeting the stringent requirements of the CB/T3191 marine standard. With an annual export value exceeding US$1 million, our products have gained trust from clients across North America, South America, Europe, Asia, Africa, and Oceania, proving their capability in diverse and challenging conditions.
This valve is designed to be a cornerstone of your piping system, offering superior corrosion resistance and long-term service life. Key features and technical specifications include:
- Superior Material Construction: Manufactured from high-grade 316 stainless steel, this valve offers exceptional resistance to corrosion, pitting, and crevice corrosion, especially in chloride-rich marine atmospheres and compressed air systems where moisture may be present.
- CB/T3191 Standard Compliance: Designed and produced in accordance with the Chinese marine industry standard CB/T3191, ensuring it meets the specific design, material, and testing requirements for marine applications, providing peace of mind for shipbuilders and marine engineers.
- Threaded Connection Convenience: Features standard threaded ends (NPT or BSP available), facilitating easy installation and maintenance without the need for welding, saving time and labor costs on board vessels or in industrial plants.
- Optimized for Compressed Air: The valve's internal design and sealing system are optimized for dry and lubricated compressed air service, ensuring minimal pressure drop, reliable shut-off, and resistance to wear from particulate matter sometimes found in air lines.
- Robust Sealing Performance: Equipped with PTFE (Polytetrafluoroethylene) seats, providing excellent sealing properties, chemical inertness, and a wide temperature range suitability, ensuring bubble-tight shut-off even after numerous cycles.
- Versatile Operation: Standard lever handle allows for quick quarter-turn operation. For larger sizes or higher torque applications, a gearbox operator is available as an optional accessory.
Detailed technical specifications are presented in the table below:
| Parameter | Specification |
| Body & Trim Material | 316 Stainless Steel (CF8M) |
| Ball Material | 316 Stainless Steel |
| Seat & Seal Material | PTFE (Standard) |
| Connection | Threaded (NPT or BSPP/BSPT) |
| Design Standard | CB/T3191 |
| Pressure Rating | PN16 / 150 WOG (Class 150) |
| Temperature Range | -20°C to 150°C (for standard media) |
| Port Type | Full Port |
| Operation | Lever Handle (Standard), Gearbox (Optional) |
| Fire Safe Design | Available upon request |
Advantages and Client Benefits:
- Enhanced System Longevity: The superior corrosion resistance of 316 stainless steel directly translates to a longer service life for the valve and reduced risk of system failure, lowering your total cost of ownership.
- Guaranteed Marine Suitability: Compliance with CB/T3191 means the valve is specifically vetted for the harsh marine environment, including vibration, shock, and saline exposure, reducing project approval hurdles.
- Installation Efficiency: Threaded connections simplify the installation process, allowing for faster system assembly and easier future maintenance or replacement compared to welded connections.
- Reliable Performance in Compressed Air: The design minimizes internal turbulence and pressure loss, ensuring efficient airflow. The robust sealing prevents leaks that can lead to energy waste and system pressure drops.
- Global Supply Chain Support: With major shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we offer flexible and reliable logistics to get your valves to key markets worldwide promptly.
Shanghai Zhibang's decade of manufacturing expertise, underpinned by our ISO9001 certification, ensures consistent product quality and performance. Our valves are not just components; they are reliability solutions trusted by clients from Eastern Europe to Southeast Asia, Africa to North America. We understand the critical nature of marine and industrial compressed air systems, and this valve is engineered to meet that challenge head-on. For a durable, compliant, and high-performing ball valve that safeguards your operations, contact us today to discuss your requirements or request a sample.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of using 316 stainless steel over 304 for this marine ball valve?
A1: 316 stainless steel contains molybdenum, which significantly enhances its resistance to corrosion from chlorides, such as saltwater spray and marine atmospheres. This makes it a more suitable and durable choice for marine applications compared to 304 stainless steel.
Q2: Does compliance with CB/T3191 mean this valve is approved for use on all ships?
A2: CB/T3191 is a recognized Chinese standard for marine valves. It indicates the valve is designed and tested for marine service. Final approval for use on a specific vessel typically depends on the classification society (e.g., ABS, DNV, LR) rules and the shipowner's specifications. Our valve provides a strong basis for such approvals.
Q3: Can this valve be used for media other than compressed air?
A3: Yes, while optimized for compressed air, its 316 SS construction and PTFE seats make it suitable for a range of compatible fluids including water, oil, gases, and many mild chemicals within its specified pressure and temperature ratings. Always confirm media compatibility for your specific application.
Q4: What threaded standards do you offer, and how do I specify?
A4: We commonly provide NPT (American National Pipe Taper) and BSP (British Standard Pipe, parallel or tapered) threads. Please specify your required thread standard and size when inquiring or placing an order.
Q5: Is the valve available in different sizes?
A5: Yes. While the core product is designed per the standard, we typically offer a range of sizes (e.g., from 1/2" to 4"). Please contact us with your required size for availability and pricing.
Q6: What is the lead time for an order?
A6: Lead time depends on order quantity and specific requirements. For standard configurations, we often have stock or short production cycles. We provide estimated lead times with every quotation to help you plan your project.
Q7: Do you offer any customization, such as different handles or locking devices?
A7: Yes, customization is available. Options like locking handles, different lever types, gear operators, and special seal materials (like reinforced PTFE or metal seats) can be discussed based on your project needs.
Q8: What are the packaging and shipping terms?
A8: Valves are typically packaged in individual cartons or wooden cases for protection. We ship from ports in Shanghai, Guangzhou, Hong Kong, or Beijing. We work with various Incoterms (FOB, CIF, etc.) to suit your logistics preferences.
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