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Home > Industrial Equipment & Components > Valve > Gate Valve > GB/T Standard Carbon Steel Marine Gate Valve With Rising Stem Design for DN50-DN300

GB/T Standard Carbon Steel Marine Gate Valve With Rising Stem Design for DN50-DN300

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Product Spotlights

GB/T standard marine gate valve in carbon steel with rising stem for clear visual indication. Features full-port flow, robust metal-seal construction, and sizes from DN50 to DN300. Designed for reliable isolation in marine and industrial systems, offering durability, safety, and easy maintenance. Backed by ISO9001 manufacturing and global export experience.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Carbon Steel

Application:

Other, Marine and Industrial Piping Systems

Design Standard:

GB/T Standard

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Material Carbon Steel

Application Other, Marine and Industrial Piping Systems

Design Standard GB/T Standard

Stem Design Rising Stem

Nominal Diameter Range DN50 to DN300

Connection Type Flanged (Standard)

Pressure Rating Available upon request

Operational Mode Manual (Handwheel)

Seat Type Metal Seat

Temperature Range Customizable

As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing robust and reliable valves for demanding global markets. Our GB/T Standard Carbon Steel Marine Gate Valve with Rising Stem Design is engineered for superior performance in marine applications and harsh industrial environments. This valve combines durability, precise flow control, and ease of maintenance, offering a cost-effective solution for critical piping systems where reliability is paramount.

The gate valve is a fundamental component for isolation services, and our design ensures full bore flow with minimal pressure drop when fully open. The rising stem visual indicator provides clear, at-a-glance status confirmation—a crucial safety and operational feature. Constructed from high-grade carbon steel, it withstands the corrosive challenges of seawater and other aggressive media commonly encountered in shipbuilding, offshore platforms, port facilities, and related industries.

Key Features & Technical Advantages:

Robust Carbon Steel Construction: The body, bonnet, gate, and stem are manufactured from quality carbon steel, providing excellent mechanical strength and resistance to deformation under high pressure.
Rising Stem Design: The non-rotating rising stem mechanism offers a clear visual indication of the valve position (open/closed), enhances sealing performance, and reduces stem thread wear.
Full Port Flow: When fully open, the gate retracts completely into the bonnet, offering an unobstructed flow path that minimizes turbulence and pressure loss.
Metal-to-Metal Sealing: The wedge gate and seat provide a tight, bubble-tight seal suitable for a wide range of fluids, including water, oil, gas, and steam.
Standard Compliance: Manufactured in accordance with Chinese GB/T standards, ensuring dimensional interchangeability and performance reliability.
Versatile Size Range: Available in nominal diameters from DN50 to DN300, catering to various pipeline requirements in marine and industrial setups.
Flanged Ends: Standard flanged connections (as per relevant standards) facilitate secure and leak-proof installation into existing piping networks.
Easy Operation & Maintenance: The handwheel operation is straightforward, and the design allows for easy maintenance, including repacking of the stem gland.

Technical Specifications Table:

Parameter	Specification / Description
Product Type	Marine Gate Valve, Rising Stem
Design & Production Standard	GB/T Standard Series
Body Material	Carbon Steel (WCB or equivalent grade)
Nominal Diameter (DN)	DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300
Pressure Class (PN)	Commonly PN16, PN25, PN40 (Customizable)
Stem Material	Stainless Steel (Optional for enhanced corrosion resistance)
Seat & Gate Material	Carbon Steel or Stainless Steel Trim
End Connection	Flanged (RF/FF), dimensions per GB/T, ANSI, or JIS standards
Operation	Manual Handwheel (Gear Operator available for larger sizes)
Temperature Range	Suitable for temperatures from -29°C to +425°C (depending on trim)
Main Application	Marine piping systems, offshore platforms, shipbuilding, power plants, general industry

Benefits for Your Operations:

Enhanced System Reliability: The robust build and tight sealing minimize the risk of leaks and failures, ensuring uninterrupted operations.
Low Lifecycle Cost: Durable construction and easy maintenance translate to reduced downtime and lower total cost of ownership.
Global Compliance & Compatibility: Adherence to GB/T standards ensures the valve can be integrated into systems requiring such specifications, particularly in markets familiar with these standards.
Operational Safety: The rising stem provides a clear open/close status, preventing operational errors and enhancing on-site safety.
Flexibility: The wide size range and customizable options (pressure rating, trim materials) allow the valve to be tailored to specific project needs.

Since our establishment in 2016, Shanghai Zhibang has built a strong reputation by exporting over US$1 million annually in high-quality valves to diverse markets across North and South America, Europe, Asia, Africa, and Oceania. Our ISO9001-certified manufacturing processes guarantee consistent quality and performance in every valve we produce. Supported by efficient logistics from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely delivery to keep your projects on schedule. Choose our GB/T Standard Marine Gate Valve for a dependable, high-performance solution backed by solid manufacturing expertise and global supply chain capability. Contact us today for a detailed quotation or to discuss your specific requirements.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a rising stem design in a gate valve?
A: The rising stem provides a direct visual indication of the valve's position—the stem rises as the valve opens. This enhances operational safety and allows for easy status checks from a distance, which is crucial in marine environments.
Q: Are these valves suitable for seawater service?
A: Yes, the carbon steel construction is suitable for many marine applications. For prolonged exposure to highly corrosive seawater, we recommend discussing optional trim materials like stainless steel for the stem and seat to enhance service life.
Q: Can you provide valves with different pressure ratings (PN) within the DN50-DN300 range?
A: Absolutely. While common ratings are PN16, PN25, and PN40, we can manufacture valves to other specified pressure classes based on your system design requirements.
Q: What are the standard flanged dimensions? Do you comply with ANSI or JIS standards?
A: Our standard production follows GB/T flange dimensions. However, to meet international project specs, we can also supply valves with ANSI (ASME B16.5) or JIS flanges upon request. Please specify your required standard when inquiring.
Q: Is the handwheel operation sufficient for larger sizes like DN300?
A: For larger diameters and higher pressure classes, manual operation with a standard handwheel can require significant effort. We offer optional gear operators for sizes such as DN250 and DN300 to reduce operating torque and make operation easier.
Q: Do you provide any certifications with the valves?
A: As a manufacturer, we operate under an ISO9001 quality management system. We can provide a material test report (MTR) and a certificate of conformity (COC) for the valves upon request. Specific product certifications (like CE, ABS, etc.) can be discussed for custom orders.
Q: What is the typical lead time for an order of DN100 valves?
A: Lead times vary based on order quantity and specific configuration. For standard DN100 valves in carbon steel, we generally maintain stock or can produce within a few weeks. Contact us with your quantity for an accurate delivery schedule.
Q: How do I determine the right valve size (DN) for my pipeline?
A: The valve's nominal diameter (DN) should match the nominal diameter of your connecting pipeline. It's also essential to consider the pressure rating (PN) based on your system's maximum working pressure. Our technical team can assist you in selection if you provide your pipeline specifications.