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Home > Industrial Equipment & Components > Valve > Gate Valve > Forged Steel Marine Gate Valve With Rising Stem, Locking Device, for High-Pressure Lines
Forged Steel Marine Gate Valve With Rising Stem, Locking Device, for High-Pressure Lines
Product Spotlights
Forged steel construction ensures maximum strength for high-pressure marine systems. Rising stem (OS&Y) design provides clear visual position indication. Integral locking device secures valve position for enhanced operational safety. Hardfaced seat and disc (Stellite/13% Cr) guarantee long-lasting, bubble-tight shut-off. Compliant with API, BS standards for global maritime project acceptance.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Other, Forged Steel (ASTM A105/A216 WCB)
Application:
Other, High-Pressure Marine & Offshore Piping Systems
Pressure Rating:
Class 150, 300, 600, 900, 1500, 2500
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Forged Steel (ASTM A105/A216 WCB)
Application
Other, High-Pressure Marine & Offshore Piping Systems
Pressure Rating
Class 150, 300, 600, 900, 1500, 2500
Connection Type
Flanged, Socket Weld, Threaded
Stem Design
Rising Stem, Outside Screw & Yoke (OS&Y)
Seat & Disc
Stellite Hardfaced or 13% Chrome
Operation
Manual Handwheel with Locking Device
Temperature Range
-29°C to 425°C (-20°F to 800°F)
Standards
API 600, API 602, BS 5352, MSS SP-70
Size Range
1/2 inch to 24 inch (DN15 to DN600)
As a specialized manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our premium Forged Steel Marine Gate Valve with Rising Stem and Locking Device. Engineered specifically for the demanding conditions of high-pressure marine and offshore applications, this valve is built to deliver reliable isolation, superior durability, and long-term performance in critical service lines. Our commitment to quality, backed by ISO9001 certification, ensures that every valve meets the stringent requirements of global maritime operations, providing shipbuilders, shipowners, and offshore platform operators with a trusted solution for fluid control. With an annual export value exceeding US$1 million, our products have gained recognition across diverse markets from North America and Europe to Southeast Asia and Africa, proving their capability and reliability in the field.
This valve is designed to withstand the corrosive, high-pressure environment of seawater, fuel oil, lube oil, and other critical shipboard systems. The forged steel construction provides exceptional strength and resistance to mechanical stress, making it ideal for main steam lines, cargo handling systems, ballast systems, and other high-integrity piping networks.
Key Product Features & Technical Advantages:
- Robust Forged Steel Body & Bonnet: Manufactured from ASTM A105 or A216 WCB forged steel, the valve offers superior mechanical properties, including high tensile strength, impact resistance, and excellent performance under thermal cycling and high pressure, compared to cast alternatives.
- Rising Stem (OS&Y) Design: The Outside Screw and Yoke design features a stem that rises as the valve is opened, providing a clear, visual indication of the valve position (open or closed), which is a critical safety feature in marine environments.
- Integral Locking Device: A built-in locking mechanism allows the valve to be secured in either the fully open or fully closed position. This prevents accidental or unauthorized operation, ensuring system integrity and safety, which is paramount for classified spaces and critical isolation points.
- Superior Sealing Performance: The wedge disc and seat rings are often hardfaced with materials like Stellite or 13% Chrome, providing exceptional resistance to erosion, corrosion, and galling, ensuring bubble-tight shut-off even after prolonged cycling.
- Flexible End Connections: Available in various end configurations to suit different piping requirements, including flanged (RF, RTJ), socket weld, and threaded (NPT, BSP) ends, facilitating easy integration into existing systems.
- Extended Service Life: Features like a reinforced gland packing system, anti-static design, and backseat functionality allow for live maintenance and contribute to a significantly extended operational lifespan with minimal downtime.
Technical Specifications Table:
| Parameter | Specification / Option |
| Design & Manufacturing Standard | API 600, API 602, BS 5352, MSS SP-70 |
| Pressure-Temperature Rating | ASME B16.34. Common Classes: 150, 300, 600, 900. |
| Temperature Range | Standard: -29°C to 425°C. Low-temp and high-temp versions available. |
| Stem Material | A182 F6a (13% Chrome) or A182 F304/316 for corrosive services. |
| Seat & Disc Hardfacing | Stellite 6 or 13% Chrome overlay is standard for wear resistance. |
| Gland Packing | Flexible Graphite or PTFE-based packing for reliable stem sealing. |
| Test & Inspection | 100% hydrostatic shell test, seat leak test per API 598. |
Benefits for Your Operations:
- Enhanced Safety & Compliance: The visual stem position and locking device directly support maritime safety regulations, preventing misoperation and ensuring safe isolation during maintenance or emergencies.
- Reduced Total Cost of Ownership: The forged construction and hardened trim materials drastically reduce wear, erosion, and the frequency of repairs or replacements, leading to lower lifecycle costs.
- High Reliability in Critical Service: Engineered for zero-leakage performance, this valve ensures the integrity of high-pressure lines, protecting expensive equipment and preventing environmental or operational hazards.
- Global Acceptance & Ease of Sourcing: Manufactured to international API and BS standards, our valves are readily accepted in shipyards and offshore projects worldwide. Our established supply chain from major Chinese ports ensures timely delivery.
Trust in a product backed by a manufacturer with a proven track record. Shanghai Zhibang's ISO9001-certified quality management system governs every stage of production, from raw material sourcing to final testing. Our valves are shipped from key logistics hubs like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient delivery to your global projects in North America, Europe, Asia, and beyond. The consistent demand from our diverse international clientele is a testament to the valve's performance and our company's reliability. For a robust, safe, and long-lasting solution for your high-pressure marine piping systems, contact us today to discuss your specifications, request a detailed quote, or arrange for product samples.
Frequently Asked Questions (FAQ):
-
Q: What is the main advantage of a forged steel body over a cast steel body for a marine gate valve?
A: Forged steel offers a denser, more homogeneous grain structure, resulting in higher strength, better impact resistance, and superior performance under high pressure and thermal stress. This makes it more suitable for the demanding, cyclic loads often encountered in marine and offshore applications compared to cast steel. -
Q: Can this valve be used for cryogenic services on LNG carriers?
A: While our standard valve is rated for -29°C, we offer specially designed low-temperature versions with extended bonnets and appropriate material grades (like A350 LF2) for cryogenic applications down to -196°C. Please specify your temperature requirements when inquiring. -
Q: How does the locking device function, and is it standard on all sizes?
A: The locking device typically consists of lugs on the handwheel yoke and a separate padlock hasp. It allows a padlock to be installed to prevent the handwheel from turning. This feature is standard on most sizes and pressure classes for marine valves to meet safety protocols. -
Q: What are the available actuator options for this valve?
A: While supplied as a manual valve with a handwheel, it is designed to be adaptable. The yoke is prepared for the mounting of gear operators, electric actuators, or pneumatic/hydraulic actuators for remote or automated operation. Actuator packages can be provided upon request. -
Q: Do you provide specific certifications for marine use, such as from classification societies?
A> We can arrange for third-party inspection and certification from major marine classification societies like ABS, DNV, LR, BV, etc., upon client request and as per project specifications. This is a common service we provide for shipbuilding projects. -
Q: What is the typical delivery lead time for an order of these valves?
A: Lead time depends on the quantity, size, pressure class, and material specifications. For standard configurations, we generally maintain stock for common sizes, offering shorter lead times. For large or custom projects, a production schedule will be provided with your quotation. -
Q: What kind of packing material do you recommend for seawater service?
A: For seawater and other general marine services, flexible graphite packing is highly recommended due to its excellent chemical inertness, self-lubricating properties, and reliable performance across a wide temperature range, ensuring a long-lasting stem seal. -
Q: Is backseat functionality included, and what is its purpose?
A> Yes, a backseat is a standard feature. It provides a secondary seal between the stem and bonnet when the valve is fully open. This allows for the safe replacement or adjustment of the gland packing while the valve is under pressure, a crucial feature for maintenance without system shutdown.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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