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Help CenterCB/T3191 Pneumatic Marine Ball Valve With Double-Acting Actuator, Mill Test Report Provided
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As a professional manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our CB/T3191 Pneumatic Marine Ball Valve with Double-Acting Actuator. Engineered specifically for the demanding marine and offshore environments, this valve combines robust construction with reliable pneumatic automation, ensuring precise flow control and safety in critical shipboard and platform applications. We understand the importance of traceability and quality assurance in these sectors, which is why every valve is accompanied by a comprehensive Mill Test Report (MTR). With an annual export value reflecting our global reach across markets from North America to Southeast Asia, we deliver valves that meet the stringent requirements of international marine projects.
This valve is designed for durability and performance in saltwater, high-pressure, and variable temperature conditions. The core design features a full-bore or reduced-bore ball that provides a tight seal with minimal pressure drop, making it ideal for a wide range of fluids including seawater, fuel, lubricants, and compressed air. The integration of a double-acting pneumatic actuator allows for rapid 90-degree quarter-turn operation, providing fail-safe open or close action depending on the system's air supply configuration. This setup is crucial for automated systems where reliable shut-off is non-negotiable.
- Superior Corrosion Resistance: Manufactured from marine-grade materials like CF8M stainless steel or carbon steel with specialized coatings (e.g., epoxy, zinc-nickel plating) to withstand harsh saline atmospheres and prevent pitting and crevice corrosion.
- High-Pressure Integrity: The valve body and seat are designed to maintain a bubble-tight seal even under high-pressure surges common in marine hydraulic and fuel systems.
- Low Torque Operation: The precision-machined ball and seats ensure smooth rotation with low friction, which is efficiently handled by the pneumatic actuator, reducing wear and extending service life.
- Fire-Safe Design Option: Available with fire-safe features where the seats are designed to maintain a seal even if the soft sealing materials are damaged by fire, a critical safety feature for fuel lines.
- Versatile Mounting: The actuator can be mounted in multiple positions, and the valve supports various flange standards (ANSI, JIS, DIN, GB) to fit into existing global marine piping networks.
- Easy Maintenance: A modular design with a blow-out proof stem and accessible internal components allows for easy in-line maintenance, minimizing downtime and operational costs.
The technical specifications of the CB/T3191 valve are detailed below. Please note that specific parameters like material grade and pressure rating can be customized upon request to match your project's P&ID (Piping and Instrumentation Diagram).
| Parameter | Specification / Option |
|---|---|
| Design Standard | CB/T 3191 (Chinese Ship Standard), GB, ANSI, DIN |
| Body Material | WCB, CF8, CF8M, CF3M, Duplex Steel |
| Ball & Stem Material | SS304, SS316, 17-4PH, with optional hardening |
| Seat Material | PTFE, RPTFE, PEEK, Metal (for fire-safe) |
| Actuator Air Supply | 4-7 bar (60-100 psi) standard |
| Actuator Options | Double-acting, spring-return (single-acting), with solenoid valve, limit switches |
| Temperature Range | -20°C to +200°C (standard); wider ranges available |
| Leakage Class | ANSI/FCI 70-2 Class VI (soft seat) or Class IV (metal seat) |
For shipbuilders, offshore rig operators, and marine system integrators, the benefits are clear. This valve offers a reliable, automated solution that reduces manual labor, enhances system safety through positive shut-off, and ensures long-term performance with minimal maintenance. The provision of a Mill Test Report guarantees material traceability, a key requirement for classification society approvals (like ABS, DNV, LR) and quality audits. By choosing our valve, you invest in a component that contributes to the overall operational efficiency and safety compliance of your marine asset.
Our commitment to quality is backed by our ISO9001 certification, ensuring every step from raw material procurement to final testing adheres to a strict quality management system. With millions of dollars in annual exports shipped from major ports like Shanghai and Guangzhou to over a dozen global markets, including North America and Southeast Asia, Shanghai Zhibang has proven its capability to deliver reliable industrial products on time. When you specify our CB/T3191 Pneumatic Marine Ball Valve, you are not just buying a valve; you are securing a partnership with a manufacturer dedicated to supporting your project's success with documented quality and technical expertise. Contact us today to discuss your specifications or request a detailed quotation.
Frequently Asked Questions (FAQ)
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What does "CB/T3191" signify in the product title?
CB/T3191 is a Chinese national professional standard specifically for marine valves. It outlines the design, material, manufacturing, testing, and inspection requirements for valves used on ships and offshore structures, ensuring they meet the necessary safety and performance criteria for marine service. -
What is the advantage of a double-acting actuator over a single-acting (spring-return) one?
A double-acting actuator uses air pressure to both open and close the valve, providing equal torque in both directions. It is generally simpler and more compact. A single-acting actuator uses air to move in one direction and a spring to return, providing fail-safe operation (fail-open or fail-close) in case of air supply loss. The choice depends on your system's safety requirements. -
Why is a Mill Test Report (MTR) important for marine applications?
An MTR is a certified document from the material mill that provides the chemical composition and mechanical properties of the raw materials used (e.g., steel plates, castings). It is crucial for traceability, quality verification, and is often a mandatory document for approval by marine classification societies and for audit purposes in critical projects. -
Can this valve be used for seawater service?
Yes, when ordered with appropriate materials. For seawater, we typically recommend valves with bodies made of super duplex stainless steel (e.g., UNS S32750) or 316 stainless steel with enhanced molybdenum content, along with compatible seat materials to resist chloride-induced corrosion and biofouling. -
What accessories are available for the pneumatic actuator?
Common accessories include solenoid valves for electrical control, limit switches to signal valve position (open/closed), manual overrides for emergency operation, air filter regulators to clean and control air supply, and quick exhaust valves to speed up actuator movement. -
Is this valve fire-safe certified?
Fire-safe versions are available upon request. These valves are designed and tested to meet standards like API 607, API 6FA, or ISO 10497, which require the valve to maintain a seal during and after exposure to fire, preventing fluid leakage that could fuel a fire. -
What is the typical lead time for an order?
Lead time varies based on order quantity, material specifications, and valve size. Standard configurations typically have a shorter lead time. We provide estimated lead times upon receipt of your detailed inquiry to ensure proper planning for your project schedule. -
Do you offer customization for specific pressure ratings or connection types?
Yes, as a manufacturer, we can customize valves to meet specific pressure classes (e.g., Class 600), end connections (butt-weld, special flange facing), actuator mounting brackets, and paint/coating specifications to match your system requirements and environmental conditions.
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