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Help CenterMarine Gate Valve CB/T3591, Rising Stem, OS&Y Type, Flanged Ends
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As a professional valve manufacturer based in Shanghai, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions for demanding marine environments. Our Marine Gate Valve, designed and manufactured in strict compliance with the CB/T3591 standard, represents our commitment to reliability, durability, and safety for shipbuilding and offshore applications. With years of experience since our establishment in 2016 and a strong export presence across global markets, we understand the critical need for valves that can withstand harsh conditions. This rising stem, OS&Y type, flanged gate valve is engineered to deliver precise flow isolation, easy operation, and long-term service life, ensuring the smooth and safe operation of your piping systems.
This valve is constructed for superior performance in marine settings, featuring a robust design that prevents stem thread corrosion and allows for clear visual indication of the valve position. The outside screw and yoke (OS&Y) design keeps the threaded portion of the stem outside the valve body and flow media, which is crucial for marine applications where corrosion resistance is paramount.
- Precise Flow Control: Provides a tight seal in the closed position, ensuring zero leakage for critical system isolation.
- Durable Construction: Manufactured from high-grade materials suitable for seawater, ballast, fuel oil, and other marine fluids.
- Easy Maintenance: The rising stem design allows for easy lubrication and maintenance of the stem threads without removing the valve from the line.
- Clear Position Indication: The position of the stem clearly shows whether the valve is open or closed, enhancing operational safety.
- Bi-directional Sealing: Effective sealing in both flow directions, offering flexibility in pipeline installation.
- Wide Compatibility: Flanged ends conform to international standards for easy integration into existing shipboard piping systems.
The technical specifications of our Marine Gate Valve are detailed below. Standard configurations are available, and customizations for material, pressure rating, and flange standards are offered to meet specific project requirements.
| Parameter | Specification |
| Design & Manufacturing Standard | CB/T3591 (Marine Standard) |
| Stem Type | Rising Stem, Outside Screw & Yoke (OS&Y) |
| End Connection | Flanged (RF, FF, RTJ customizable) |
| Nominal Pressure (PN) | PN10, PN16, PN25, PN40 (Standard) |
| Nominal Diameter (DN) | DN50 to DN600 (Custom sizes available) |
| Body Material Options | Cast Steel (WCB, WCC), Ductile Iron, Stainless Steel |
| Seat & Disc Material | Stainless Steel, Bronze, or other alloys |
| Operation | Manual Handwheel (Gear Operator optional) |
| Temperature Range | -20°C to +425°C (Depends on material) |
| Applicable Media | Seawater, Fresh Water, Fuel Oil, Lubricating Oil, Air |
Choosing our valve provides distinct advantages for shipyards, vessel owners, and marine engineers. The OS&Y design significantly extends service life by protecting vital components from corrosive media. The flanged ends ensure a leak-proof connection that is both strong and easy to install or remove for maintenance. Furthermore, compliance with the CB/T3591 marine standard guarantees that the valve meets the rigorous requirements for strength, materials, and testing specific to maritime use, providing peace of mind for critical applications.
Backed by our ISO9001 certified manufacturing processes, Shanghai Zhibang ensures consistent quality and traceability for every valve produced. Our annual export value of US$1 Million to US$1.5 Million and our extensive reach across markets including North America, South America, Eastern Europe, Southeast Asia, Africa, and Oceania demonstrate our proven capability to meet international client expectations. We support flexible shipment from major ports like Shanghai, Guangzhou, Hongkong, and Beijing. For a reliable, durable, and standards-compliant solution for your marine piping systems, our CB/T3591 Marine Gate Valve offers performance you can trust. Contact us today for a detailed quotation or to discuss your specific project needs.
Frequently Asked Questions (FAQ)
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What is the main advantage of the OS&Y (Outside Screw & Yoke) design in a marine gate valve?
The OS&Y design places the stem threads outside the valve body and the flow path. This protects them from direct contact with corrosive or abrasive media (like seawater), significantly reducing wear and corrosion, simplifying lubrication, and making it easy to visually confirm if the valve is open or closed based on stem position. -
Is this valve suitable for seawater service?
Yes, it is specifically designed for marine applications. When ordered with appropriate body and trim materials (such as cast steel with stainless steel trim), it offers excellent corrosion resistance for handling seawater, ballast water, and other marine fluids. -
Can you provide valves with flanges to match specific standards like ANSI, JIS, or DIN?
Absolutely. While the valve conforms to CB/T3591, the flanged ends can be manufactured to match various international standards such as ANSI, JIS, DIN, BS, or GB upon request, ensuring compatibility with your existing piping. -
What is the difference between a rising stem and a non-rising stem gate valve?
In a rising stem valve, the stem threads are on the yoke, and the stem rises as the valve opens. This provides a clear visual indicator. In a non-rising stem design, the stem threads are inside the valve, and the stem does not move up/down, which is useful where vertical space is limited. The rising stem is often preferred in marine applications for its maintenance and indication benefits. -
Do you offer actuated versions of this valve?
While the standard configuration is manual handwheel operation, we can provide options for electric, pneumatic, or hydraulic actuators to enable remote operation. Please specify your requirements for a customized solution. -
What pressure classes (PN/Class) are available?
Standard pressure ratings include PN10, PN16, PN25, and PN40. Higher pressure classes equivalent to ANSI 150, 300, or 600 can also be manufactured based on your design specifications. -
What is the lead time for an order?
Lead time depends on order quantity, material specifications, and customization level. Standard configurations typically have shorter lead times. We provide accurate delivery estimates upon receipt of your detailed inquiry. -
Do you provide documentation and certification with the valves?
Yes, we provide essential documentation including material certificates, pressure test reports, and dimensional drawings. Certifications like ISO9001 are part of our quality management system, and specific product certifications can be discussed as needed.
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