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Home > Industrial Equipment & Components > Valve > Gate Valve > GB/T Marine Gate Valve DN50 DN150 Flanged Connection Steam Ship Systems

GB/T Marine Gate Valve DN50 DN150 Flanged Connection Steam Ship Systems

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Product Spotlights

GB/T standard marine gate valves for steam systems, featuring flanged connections (DN50-DN150) and robust cast steel/SS construction. Designed for reliable bidirectional shut-off, full-bore flow, and high-temperature service up to 425°C. Options include handwheel, gear, or electric actuation. ISO9001 certified manufacturer ensures quality for global maritime applications.

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

Key Specifications

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Product Standard:

GB/T

Connection Type:

Flanged

Nominal Diameter (DN):

DN50, DN65, DN80, DN100, DN125, DN150

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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
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Product Standard GB/T

Connection Type Flanged

Nominal Diameter (DN) DN50, DN65, DN80, DN100, DN125, DN150

Applicable Medium Steam, Water, Oil

Application System Ship Steam Systems, Marine Piping

Body Material Cast Steel, Ductile Iron, Stainless Steel

Operation Type Handwheel, Gearbox, Electric Actuator

Pressure Rating PN16, PN25, PN40

Design Temperature Up to 425°C

Face-to-Face Dimension As per GB/T standard

As a professional valve manufacturer with a strong foothold in the global marine industry, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our GB/T standard Marine Gate Valves. Engineered specifically for demanding shipboard applications, particularly steam systems, these flanged connection valves offer reliable shut-off, robust construction, and full compliance with international maritime standards. Our commitment to quality, backed by ISO9001 certification, ensures that every valve delivers consistent performance and durability, making it a trusted component for shipbuilders and marine engineers worldwide.

Our Marine Gate Valves are designed to meet the rigorous demands of marine environments. The key features and technical specifications are detailed below:

Robust Construction & Materials: The valve body is typically manufactured from high-grade cast steel (WCB), ductile iron, or stainless steel (CF8/CF8M), offering excellent resistance to corrosion, high pressure, and thermal stress encountered in steam service.
Flanged Connection Design: The flanged ends conform to international standards such as GB/T, JIS, or ANSI, ensuring easy, leak-proof installation and integration into existing ship piping networks. This design facilitates maintenance and replacement.
Full-Bore Flow Path: When fully open, the gate retracts completely into the bonnet, providing a straight, unobstructed flow path. This minimizes pressure drop and turbulence, which is crucial for efficient steam system operation.
Bidirectional Sealing: The valve provides tight sealing in both flow directions, a critical feature for systems where flow direction may change or for isolation during maintenance.
Multiple Operation Options: Available with standard handwheel operation for manual control, or optionally equipped with gearboxes for high-torque applications and electric actuators for remote or automated control systems.
Extended Service Life: Critical sealing surfaces are often hardened or coated with wear-resistant materials like Stellite to withstand erosion from high-velocity steam, ensuring long-term, reliable shut-off capability.

Technical Specifications Table:

Parameter	Specification
Product Standard	GB/T
Nominal Diameter (DN)	DN50, DN65, DN80, DN100, DN125, DN150
Pressure Rating (PN)	PN16, PN25, PN40 (Commonly supplied)
Connection Type	Flanged (RF face common)
Body Material	Cast Steel (WCB), Ductile Iron, Stainless Steel (304/316)
Stem Material	Stainless Steel (13% Cr or 304/316)
Seat Material	Stellite hard-faced, 13% Cr, or Stainless Steel
Packing Material	Graphite, PTFE, or Flexible Graphite
Design Temperature Range	-29°C to 425°C (for carbon steel bodies)
Applicable Medium	Steam, Hot Water, Oil, Gas
Operation	Handwheel, Gear Operator, Electric Actuator (Optional)

The advantages of choosing our GB/T Marine Gate Valves translate directly into tangible benefits for your projects:

Enhanced System Reliability: The robust design and quality materials prevent unexpected failures, ensuring the continuous and safe operation of critical ship steam systems.
Simplified Installation & Maintenance: Standard flanged connections and accessible design reduce installation time and cost. The valves are designed for ease of maintenance, even in confined engine room spaces.
Optimal Flow Efficiency: The full-bore design maintains system pressure and flow rates, contributing to overall energy efficiency of the steam plant.
Global Compliance & Compatibility: Manufactured to GB/T standards with options for other international norms, these valves are suitable for shipyards and vessels operating worldwide.
Cost-Effective Solution: Combining competitive pricing from our direct manufacturing with extended service intervals and durability, these valves offer an excellent total cost of ownership.

With nearly a decade of experience since our establishment in 2016, Shanghai Zhibang Valve has grown into a trusted supplier, exporting to key markets across North and South America, Europe, Asia, Africa, and Oceania. Our annual export value of US$1-1.5 million reflects the confidence of our global clientele. Our ISO9001 certified quality management system governs every stage of production, from raw material inspection to final testing. We support our customers with flexible shipment options from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing. For your next marine project requiring dependable steam system valves, choose a partner committed to quality and reliability. Contact us today for a quotation or to discuss your specific requirements.

Frequently Asked Questions (FAQ)

Q: What is the main application of this gate valve?
A: This valve is primarily designed for on/off isolation service in ship steam systems, including main steam lines, auxiliary steam lines, and other high-temperature fluid applications onboard vessels.
Q: Can this valve be used for throttling or flow control?
A: No, gate valves are not recommended for throttling. Partial opening can cause vibration, wire-drawing (erosion) of the seat and disc, and may lead to premature failure. They are designed for fully open or fully closed positions only.
Q: What material options are available for corrosive media?
A: For handling corrosive steam or fluids, we recommend stainless steel bodies (CF8/304 or CF8M/316). The specific grade can be selected based on the chloride content and temperature of the medium.
Q: Are the flanges compatible with ANSI or JIS standards?
A: While manufactured to GB/T standards, the flange dimensions are often compatible with common ANSI or JIS classes (like 150# or 10K). It is crucial to provide your specific flange standard and rating during inquiry to ensure perfect compatibility.
Q: What is the lead time for an order of DN100 valves?
A: Lead times vary based on order quantity, material specification, and operation type. Standard configurations typically have shorter lead times. Please contact our sales team with your detailed requirements for an accurate production schedule.
Q: Do you provide valves with electric actuators?
A: Yes, electric actuators from reputable brands can be supplied and mounted as an optional feature. We can provide integrated packages with necessary controls upon request.
Q: What testing is performed before shipment?
A> Each valve undergoes hydrostatic shell and seat tests per applicable standards (like GB/T 13927) to verify pressure integrity and sealing performance. Test certificates are available upon request.
Q: Can you provide valves with different pressure ratings like PN64?
A: Yes, higher pressure ratings are available. Our standard offering includes PN16, PN25, and PN40. For PN64 or other special ratings, please inquire as they may involve custom manufacturing.