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Home > Industrial Equipment & Components > Valve > Gate Valve > Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range

Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range

Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range thumbnail-3

Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range thumbnail-4

Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range thumbnail-5

Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range photo-1

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Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range photo-4

Manual Bronze Gate Valve for Marine Seawater Systems, DN15 to DN200 Size Range photo-5

Product Spotlights

Engineered for harsh marine environments, this manual bronze gate valve offers superior seawater corrosion resistance with a full DN15-DN200 size range. Featuring a robust metal-to-metal seal, rising stem design for clear position indication, and versatile end connections, it ensures reliable, low-maintenance isolation in cooling, ballast, and firefighting systems. Manufactured under ISO9001 standards and exported globally.

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

Key Specifications

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Material:

Other, Bronze (C83600/C84400)

Application:

Other, Marine Seawater Piping Systems

Size Range:

DN15 to DN200

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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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Material Other, Bronze (C83600/C84400)

Application Other, Marine Seawater Piping Systems

Size Range DN15 to DN200

Connection Type Threaded (NPT/BSP) or Flanged

Operation Type Manual Handwheel

Pressure Rating PN16/PN25 (150/300 psi class)

Temperature Range -20°C to 120°C

Seat Type Metal-to-metal (Bronze)

Design Standard ISO 5996 / BS 1400

Packing Graphite or PTFE

As a leading manufacturer with a strong commitment to maritime fluid control, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our specialized Manual Bronze Gate Valve engineered for demanding marine seawater systems. Since our establishment in 2016, we have focused on delivering robust and reliable valve solutions that withstand harsh oceanic environments. Our valves are the result of precision engineering and stringent quality control under our ISO9001-certified management system, ensuring every unit from DN15 to DN200 provides dependable isolation for critical shipboard and offshore applications.

This valve series is specifically designed to combat the corrosive nature of seawater, offering superior longevity and maintenance-free operation in pipelines carrying seawater for cooling, ballast, firefighting, and general service. The core value lies in its exceptional material integrity and functional reliability, providing shipbuilders, shipyards, and marine equipment suppliers with a cost-effective and durable flow control component.

Detailed Product Features & Technical Specifications:

Corrosion-Resistant Bronze Body: Manufactured from high-grade naval bronze alloys (C83600/C84400), offering excellent resistance to seawater corrosion, dezincification, and erosion, far surpassing standard brass or iron materials.
Full Port Design: Provides minimal flow restriction and pressure drop when fully open, ensuring efficient system performance and allowing for easy passage of cleaning pigs or inspection tools.
Rising Stem & Non-Rising Handwheel: The outside screw and yoke (OS&Y) design with a rising stem offers clear visual indication of the valve position (open/closed), enhancing operational safety. The handwheel is ergonomically designed for smooth operation even under high differential pressure.
Metal-to-Metal Seating: The wedge and seat are precision-machined from bronze, creating a tight, bubble-tight seal suitable for seawater applications where soft seats might degrade.
Robust Stem Packing: Utilizes high-quality graphite or reinforced PTFE packing rings, adjustable via the gland follower, to ensure a reliable stem seal and prevent leakage to the atmosphere.
Versatile End Connections: Available in threaded (NPT, BSP) or flanged ends (RF, FF) as per common marine standards, facilitating easy installation and replacement in existing piping networks.

Technical Parameters Table:

Parameter	Specification
Nominal Diameter (DN)	15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200
Pressure Rating	PN16 (150 psi class) / PN25 (300 psi class) optional
Max Operating Temperature	Up to 120°C (248°F)
Body & Trim Material	Bronze ASTM B62 / BS 1400 LB2
Stem Material	Bronze or Stainless Steel (optional)
Seat & Wedge Material	Bronze
Test Standards	Shell Test: 1.5 x PN; Seat Test: 1.1 x PN

Advantages & Customer Benefits:

Enhanced System Longevity: The superior corrosion resistance directly translates to a longer service life for the valve and the connected piping system, reducing total lifecycle costs.
High Reliability & Safety: The robust metal-seated design ensures reliable shut-off even after prolonged periods in a static position, crucial for emergency isolation in marine systems.
Low Maintenance: Durable construction and quality materials minimize the need for frequent maintenance or premature replacement, lowering operational downtime and labor costs.
Global Compliance & Compatibility: Designed to meet common international marine and industrial standards, making them suitable for vessels and platforms operating worldwide.
Flexible Sourcing: With a comprehensive size range from DN15 to DN200, customers can source all their standard seawater gate valve requirements from a single, reliable supplier.

Backed by our annual export value of US$1-1.5 million and a proven track record of supplying to diverse markets across North America, South America, Europe, Asia, Africa, and Oceania, Shanghai Zhibang has established itself as a trustworthy global partner. Our valves are shipped from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient logistics to your project site. Choosing our Manual Bronze Gate Valve means investing in a component built for performance, backed by ISO9001 quality assurance, and supported by a manufacturer with extensive international experience. Contact us today to discuss your specific requirements or to request a quotation for your next marine project.

Frequently Asked Questions (FAQ):

Q: Why is bronze the preferred material for seawater valves?
A: Bronze alloys, particularly those with high copper and tin content, offer outstanding resistance to corrosion, biofouling, and erosion caused by seawater's salt content, chlorides, and sand particles, ensuring long-term durability.
Q: Can this valve be used for other fluids besides seawater?
A: Yes. While optimized for seawater, these bronze gate valves are also suitable for other non-aggressive fluids like freshwater, oils, gases, and steam within the specified temperature and pressure limits.
Q: What is the difference between PN16 and PN25 pressure ratings?
A: PN16 indicates a nominal pressure rating of 16 bar (~232 psi) at room temperature, while PN25 is rated for 25 bar (~363 psi). The selection depends on your system's maximum operating pressure.
Q: Are these valves suitable for underground or submerged applications?
A: For permanently submerged service, specific design considerations like extended stems or different packing may be required. Please consult with our technical team for such custom applications.
Q: Do you provide certifications or test reports with the valves?
A: Standard production includes a factory test certificate (shell and seat tests). Additional certifications specific to marine classification societies (like ABS, DNV, LR) can be arranged upon request.
Q: What is the typical lead time for an order?
A: Lead times vary based on size, quantity, and end connection type. Standard sizes are often available from stock, while larger or customized orders may have a production lead time of 4-8 weeks.
Q: How should these valves be stored and handled before installation?
A: Store in a dry environment. Keep end protectors on to prevent damage to threads or flanges. Cycle the valve open and closed a few times before installation to ensure smooth operation.
Q: Can you supply valves with actuators for remote operation?
A: Our standard offering is manual handwheel operation. However, we can facilitate the provision of compatible electric, pneumatic, or hydraulic actuators through partners for automated systems.