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Home > Industrial Equipment & Components > Valve > Gate Valve > Marine Gate Valve With Bypass for High-Pressure Cooling Systems

Marine Gate Valve With Bypass for High-Pressure Cooling Systems

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Product Spotlights

Specifically engineered for marine high-pressure cooling systems, this gate valve features a crucial integrated bypass for safe pressure equalization, preventing water hammer. Constructed from corrosion-resistant materials like stainless steel or bronze, it ensures reliable, bubble-tight shut-off and extends service life in harsh seawater environments. The design allows for easy maintenance and system isolation, reducing operational downtime.

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

Key Specifications

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Material:

Other, Carbon Steel / Stainless Steel / Bronze

Application:

Other, Marine Engine Cooling

Pressure Rating:

Class 150 to Class 2500

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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 Other, Carbon Steel / Stainless Steel / Bronze

Application Other, Marine Engine Cooling

Pressure Rating Class 150 to Class 2500

Connection Type Flanged / Threaded / Welded

Bypass Configuration Integral or External Bypass Line

Operation Type Manual Handwheel / Gear Operated / Actuated

Seat Type Metal Seated / Resilient Seated

Temperature Range -20°C to 425°C

Size Range DN50 to DN600 (2“ to 24“)

Standards ISO, DIN, ANSI, JIS, GB

As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in engineering robust fluid control solutions for demanding maritime applications since 2016. Our Marine Gate Valve with Bypass is meticulously designed for high-pressure cooling systems, where reliability is non-negotiable. This valve provides a critical safety and maintenance feature, allowing for system isolation and pressure equalization without disrupting the entire cooling loop. Engineered for longevity in corrosive marine environments, it represents our commitment to delivering performance-driven components that shipbuilders and marine engineers trust.

Core Design & Operational Advantages:

Integrated Bypass Functionality: The key feature is the built-in or externally piped bypass line. This allows operators to slowly equalize pressure across the closed main valve before opening it, preventing water hammer and reducing stress on the valve disc and seat. It also enables partial flow or testing while the main valve is under maintenance.
Rugged Construction for Marine Duty: We offer body materials like cast carbon steel with corrosion-resistant coatings, stainless steel (CF8M/316), and naval bronze to withstand seawater, high salinity, and varying temperatures. Internal components are hardened for wear resistance.
Superior Sealing & Leak Prevention: Features a parallel or wedge disc design with precision-machined metal-to-metal or resilient seats (optional) to ensure bubble-tight shut-off, even after prolonged periods in the closed position, which is vital for system integrity.
High-Pressure Capability: Specifically engineered for cooling system pressures, with ratings available from Class 150 up to Class 2500. The robust stem, yoke, and gland packing are designed to contain pressure without failure.
Ease of Operation & Maintenance: Designed with a rising stem for clear visual indication of valve position. The packing gland is easily accessible for adjustment or replacement. Gear operators or actuators can be fitted for large-size or hard-to-reach valves.

Technical Specifications & Configuration Options:

Parameter	Specification / Options
Design Standard	ISO 5208, API 600, ANSI B16.34
Face-to-Face	ISO 5752, ANSI B16.10
Flange Standard	ISO, DIN, ANSI, JIS, GB (as requested)
Bypass Valve Type	Globe or Needle Valve (integral or separate)
Stem Material	Stainless Steel (standard), with anti-galling treatment
Packing	Graphite, PTFE, or Flexible Graphite for high-temp

Benefits for Your Marine Operations:

Enhanced System Safety: The bypass dramatically reduces the risk of pressure surges and associated component damage during valve cycling, protecting expensive cooling system assets.
Reduced Maintenance Downtime: Enables isolation of specific sections (e.g., a heat exchanger) for service without draining the entire cooling circuit, saving significant time and labor.
Extended Service Life: The combination of corrosion-resistant materials, robust design for pressure cycling, and the pressure-equalizing feature minimizes wear, leading to a longer operational lifespan.
Operational Flexibility: Allows for flow control, system warm-up, and venting through the bypass, providing operators with greater control over the cooling process.

Backed by nearly a decade of manufacturing expertise and an annual export value demonstrating global trust, Shanghai Zhibang delivers valves that meet the rigorous demands of international maritime markets. Our products are shipped worldwide from major Chinese ports, ensuring timely delivery to shipyards and marine service providers. We understand that a valve failure in a high-pressure cooling system can lead to critical engine downtime. Therefore, we build our Marine Gate Valves with Bypass to be a component you install and rely on for years. Contact us today to discuss your specific pressure, size, and material requirements for a reliable, high-performance solution.

Frequently Asked Questions (FAQ):

Q: What is the primary purpose of the bypass on this gate valve?
A: The bypass serves two main functions: first, to equalize pressure across the main valve before opening, preventing water hammer and easing operation; second, to allow a small controlled flow for system warming, testing, or when the main valve is under repair.
Q: Can this valve be used with seawater directly?
A: Yes, when ordered with appropriate materials. We highly recommend stainless steel (316/CF8M) or bronze bodies with compatible trim for direct seawater service to combat corrosion effectively.
Q: Is the bypass valve included, or is it a separate purchase?
A> It can be configured both ways. We offer models with an integral, factory-mounted small globe or needle valve as the bypass. Alternatively, we can supply the main gate valve with standard bypass connections for you to install a separate valve per your piping design.
Q: What types of actuators are compatible with this valve?
A> The valve is designed with a standard mounting pad compatible with electric, pneumatic, or hydraulic actuators from major brands. Actuator selection depends on your available power source, required speed, and fail-safe needs.
Q: How do I determine the correct pressure class (e.g., Class 150, 300) for my application?
A> The class should be selected based on the maximum working pressure and temperature of your cooling system. Please provide these parameters, and our engineering team can recommend the suitable pressure rating.
Q: What is the lead time for a custom-sized or special material valve?
A> Standard sizes and materials typically have shorter lead times. For custom requirements, lead time varies but is usually communicated clearly upon receipt of your detailed specifications. We maintain efficient production to meet project schedules.
Q: Do you provide test reports for the valves?
A> Yes. Standard delivery includes a factory test report covering shell test and seat leak test per ISO 5208 or other specified standards. More rigorous tests like NDE can be arranged upon request.
Q: What after-sales support do you offer?
A> We provide detailed installation and maintenance manuals, spare parts lists, and technical support. Critical spare parts like gland packing, gaskets, and seals are available for order.