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Help CenterPneumatic Marine Ball Valve CB/T3191, Corrosion-Resistant for Seawater Service
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As a leading valve manufacturer with a strong global presence, Shanghai Zhibang Valve is dedicated to providing robust and reliable fluid control solutions for demanding marine environments. Our Pneumatic Marine Ball Valve, manufactured in strict compliance with the CB/T3191 standard, is engineered specifically to withstand the harsh, corrosive nature of seawater service. Built with precision and durability in mind, this valve offers superior performance, long service life, and minimal maintenance requirements, making it an ideal choice for shipbuilding, offshore platforms, and coastal facilities. With our ISO9001 certified quality management system, we ensure every valve meets the highest standards of craftsmanship and reliability, supporting your critical operations across the globe from North America and Europe to Southeast Asia and Africa.
This valve is designed to offer exceptional control and sealing in marine applications. The key to its performance lies in the selection of premium corrosion-resistant materials for the body, ball, and stem, such as bronze, 316 stainless steel, or specially coated carbon steel, which effectively combat saltwater corrosion and pitting. The integration of a pneumatic actuator enables remote and automated operation, which is crucial for modern vessel control systems and hard-to-reach installations.
Key Features and Technical Advantages:
- Superior Corrosion Resistance: Constructed from materials specifically chosen for seawater compatibility, ensuring long-term integrity and preventing failure due to saltwater exposure.
- Reliable Pneumatic Actuation: Provides quick (90-degree) quarter-turn operation for immediate flow control. Actuators are available in double-acting or spring-return (fail-safe) configurations to meet various safety and operational needs.
- Robust Sealing Performance: Utilizes advanced seat materials like PTFE or reinforced polymers that offer excellent sealing, low friction, and resistance to a wide temperature range, ensuring bubble-tight shut-off even after prolonged use.
- Low Maintenance Design: Features a simple, robust design with minimal moving parts. Stem seals are easily adjustable or replaceable, reducing downtime and operational costs.
- Versatile Configurations: Available in a wide range of sizes, pressure ratings, and end connections (flanged, threaded) to fit seamlessly into diverse piping systems onboard ships and offshore structures.
Technical Specifications at a Glance:
| Parameter | Specification / Options |
| Design Standard | CB/T3191 (Chinese Ship Standard) |
| Body Material | Bronze, Cast Steel (WCB), 316 Stainless Steel, Duplex Steel |
| Ball & Stem Material | SS304, SS316, Chrome Plated, with optional coatings |
| Seat & Seal Material | PTFE, RPTFE, Nylon, PEEK, Metal Seated (for high temp) |
| Nominal Size (DN) | 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200 |
| Pressure Rating | PN10/16/25, ANSI Class 150/300 |
| Actuator Air Supply | 4-7 bar (Standard), other ranges available |
| Operating Temperature | -20°C to +180°C (Standard with PTFE), up to +400°C (Metal Seated) |
| Flow Characteristic | Quick Opening, Full Port or Reduced Port |
The benefits for your marine operation are significant. By choosing our CB/T3191 Pneumatic Ball Valve, you gain a component that enhances system reliability, reduces the risk of costly leaks or failures in critical seawater lines (like cooling, ballast, or firefighting systems), and simplifies automation integration. Its durability translates to lower total cost of ownership through extended service intervals and reduced replacement frequency, even in the most challenging saltwater environments.
Shanghai Zhibang Valve combines manufacturing expertise with a proven track record of international delivery. Established in 2016, we have rapidly grown our annual export value to between US$1-1.5 Million, serving diverse markets from North America and Western Europe to Africa and Oceania. Our products are shipped efficiently from major ports like Shanghai, Guangzhou, and Hong Kong. Our commitment to quality, underscored by our ISO9001 certification, means you can trust the performance and consistency of every valve we produce. For a fluid control solution that stands up to the sea, offers reliable automation, and is backed by a responsive global manufacturer, 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 "CB/T3191" specifically mean for this valve?
A: CB/T3191 is a Chinese national standard specifically for marine valves. It defines the design, material, testing, and inspection requirements for valves used on ships and marine platforms, ensuring they meet the necessary safety and performance criteria for maritime service. -
Q: Can this valve handle other fluids besides seawater?
A: Absolutely. While optimized for seawater, its corrosion-resistant construction makes it suitable for a variety of media including fresh water, compressed air, fuel oil, lubricating oil, and other non-aggressive chemicals, depending on the specific material configuration chosen. -
Q: What are the available options for the pneumatic actuator?
A> We offer double-acting actuators (for on/off control) and spring-return actuators (which automatically return to a predefined open or closed position upon air failure for safety). Options include solenoid valves, limit switches, positioners, and manual overrides for integrated control. -
Q: How does the corrosion resistance compare between bronze and 316 stainless steel bodies?
A> Both offer excellent seawater resistance. Bronze has a long history in marine applications and offers good machinability and cost-effectiveness. 316 stainless steel provides superior strength and resistance to a broader range of corrosive elements, making it ideal for more demanding or higher-pressure applications. -
Q: What is the typical lead time for an order?
A> Lead times vary based on order quantity, size, and material specifications. Standard configurations typically have shorter lead times. We provide accurate delivery estimates upon order confirmation and utilize multiple shipping ports for efficient logistics. -
Q: Are spare parts like seals and gaskets readily available?
A> Yes. We maintain an inventory of common spare parts and can provide comprehensive maintenance kits. The valve's design prioritizes serviceability, making part replacement straightforward. -
Q: Do you offer customization for specific project requirements?
A> We do. Customizations can include special material combinations, unique pressure ratings, extended stem lengths for insulation, specific paint coatings, and actuator accessories. Please provide your detailed specifications for a tailored solution. -
Q: What kind of testing is performed on these valves before shipment?
A> Each valve undergoes rigorous testing, which typically includes shell strength test, seat leakage test (both low-pressure and high-pressure), and operational tests for the actuator. Certificates of compliance and test reports can be provided.
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