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Marine Gate Valve With Bypass Valve, Includes Onboard Technical Support
Product Spotlights
Marine-grade gate valve featuring an integrated bypass for safe pressure equalization, preventing water hammer and reducing wear. Constructed from durable, corrosion-resistant materials (cast steel, stainless steel) for harsh seawater environments. Available in sizes DN50-DN600 with flanged connections. Includes valued onboard technical support for installation and troubleshooting. ISO 9001 manufacturing ensures reliable performance for ballast, bilge, cooling, and fuel systems.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Other, Cast Steel, Ductile Iron, Stainless Steel (optional)
Application:
Other, Seawater
Standard:
Other, ISO 9001 Manufacturing System
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Cast Steel, Ductile Iron, Stainless Steel (optional)
Application
Other, Seawater
Standard
Other, ISO 9001 Manufacturing System
Pressure Rating
Class 150, Class 300, Class 600 (customizable)
Connection Type
Flanged End, Threaded End
Size Range
DN50 to DN600 (2“ to 24“)
Bypass Valve Type
Integral Globe or Needle Valve
Operation
Handwheel, Gear Operator, Electric Actuator (optional)
Seat Type
Metal Seated, Resilient Seated
Service
Onboard Technical Support Available
As a dedicated manufacturer with a proven track record since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in delivering robust and reliable fluid control solutions for the demanding marine industry. Our Marine Gate Valve with Bypass Valve is engineered to meet the rigorous challenges of shipboard operations, offering superior performance, enhanced safety, and simplified maintenance. We understand that downtime is not an option at sea, which is why we design our valves for exceptional durability and back them with comprehensive onboard technical support. This combination of high-quality hardware and expert service ensures your vessel's critical systems operate smoothly and efficiently, voyage after voyage.
Core Design & Technical Advantages:
- Integrated Bypass System: The valve features a built-in bypass valve (typically a globe or needle type) that allows for safe pressure equalization across the gate before the main valve is opened or closed. This critical feature prevents water hammer, reduces wear on the valve seat and disc, and protects connected piping from stress, significantly extending the service life of the entire system.
- Rugged Construction for Marine Environments: Manufactured from materials like cast steel, ductile iron, or corrosion-resistant stainless steel, the valve body is built to withstand constant exposure to seawater, salt spray, and varying operational pressures. Internal components are selected for their resistance to erosion and corrosion, ensuring reliable sealing and operation.
- Versatile Operation and Configuration: Available with standard handwheel operation for manual control or optionally equipped with gear operators or electric actuators for remote and automated valve control systems. Flanged connections per international standards (e.g., ANSI, JIS, DIN) ensure easy integration into existing shipboard piping networks.
- Enhanced Safety and Maintenance: The design prioritizes operational safety. The bypass allows for safe isolation and maintenance of sections of the pipeline. The robust construction minimizes the risk of catastrophic failure. Furthermore, the valve design often allows for in-line maintenance or repair, reducing the need for complete removal.
Detailed Specifications & Configurations:
The following table outlines common specifications for our Marine Gate Valve with Bypass. Custom configurations are available to meet specific project requirements.
| Parameter | Specification / Option |
|---|---|
| Design Standard | API 600, API 6D, BS, DIN, JIS |
| Pressure Class | PN10/16/25/40, Class 150, Class 300 |
| Size Range (DN) | 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600 |
| Bypass Valve Size | Typically DN15 to DN50, proportional to main valve size |
| Test Standards | Shell Test, Seat Test per API 598 / ISO 5208 |
| Packing Material | Graphite, PTFE, Flexible Graphite (for high temp) |
Application Scenarios & Client Benefits:
- Ballast Water Systems: Provides reliable isolation and control for ballast tanks, with the bypass enabling safe and gradual filling/emptying operations to maintain vessel stability.
- Bilge and Drain Systems: Ensures effective isolation for maintenance and emergency shutdowns. The robust construction handles potentially debris-laden fluids.
- Seawater Cooling Lines: Controls the flow of raw water for engine coolers and heat exchangers. Corrosion-resistant materials are key for longevity in this application.
- Fuel Oil and Lubrication Oil Transfer Lines: Offers secure shut-off for fuel bunkering and transfer operations. The tight seal prevents leaks and ensures safety.
- Firefighting Systems: Acts as a reliable isolation valve in seawater fire mains, ensuring system integrity and readiness.
For clients, this translates to reduced operational risk through safer valve operation, lower lifecycle costs due to extended maintenance intervals and component life, and increased system reliability for critical marine functions.
Our Commitment & Your Assurance:
Shanghai Zhibang's commitment to quality is underpinned by our ISO 9001 certified manufacturing system, ensuring consistent production standards for every valve that leaves our facility. With an annual export value reflecting our global reach, we have successfully supplied reliable valve solutions to markets across North and South America, Europe, Asia, Africa, and Oceania. Our products are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics. Beyond the product itself, we distinguish our offering with the included onboard technical support. This means expert assistance is available for installation guidance, operational training, or troubleshooting, directly contributing to the seamless integration and optimal performance of our valves on your vessel. This holistic approach—combining durable products, certified quality control, and proactive support—provides a compelling value proposition for shipowners, shipyards, and marine engineers seeking dependable partners.
Frequently Asked Questions (FAQ):
-
Q: What is the primary purpose of the bypass valve on this marine gate valve?
A: The bypass valve serves to equalize pressure across the closed gate of the main valve before it is operated. Opening the small bypass first allows fluid to flow slowly, balancing pressure on both sides. This prevents water hammer, reduces strain on the valve operator, and minimizes wear on the sealing surfaces, making the main valve easier and safer to open or close. -
Q: Can this valve be used for both isolation and throttling/flow control?
A: Gate valves are primarily designed for isolation (fully open or fully closed). Using them for throttling can cause vibration, cavitation, and accelerated wear on the seat and disc. The bypass valve, however, often a globe or needle type, can be used for fine flow control or pressure regulation in conjunction with the main valve's isolation function. -
Q: What materials do you recommend for seawater service?
A: For seawater applications, we typically recommend a valve body and bonnet made of cast steel with suitable corrosion-resistant coatings (e.g., epoxy) or stainless steel (CF8M/316 grade) for superior corrosion resistance. Trim materials (seat, disc) would also be specified in harder, corrosion-resistant alloys like stainless steel. -
Q: Is the onboard technical support included in the product price?
A> Yes, technical support consultation is a key part of our offering. This typically includes pre-installation guidance, documentation review, and remote troubleshooting support. The specific scope and any potential costs for on-site physical visits would be detailed in our service agreement and can be customized based on the project's needs and location. -
Q: What is the lead time for a custom-sized or specially coated valve?
A: Lead times vary based on the complexity of the customization, material availability, and our current production schedule. For standard sizes and materials, lead time is generally shorter. We provide estimated lead times upon receipt of detailed specifications and work closely with clients to meet project timelines where possible. -
Q: How do you ensure the valve's performance and leak-tightness?
A> Every valve undergoes rigorous factory acceptance testing before shipment. This includes a shell test (hydrostatic pressure test on the body) and a seat leak test (pneumatic or hydrostatic) performed in accordance with international standards like API 598 or ISO 5208. Test certificates can be provided as part of the documentation package. -
Q: Can the valve be equipped with an actuator for remote operation?
A: Absolutely. We can provide valves prepared for the mounting of electric, pneumatic, or hydraulic actuators. It is crucial to provide details such as available power supply, required torque/thrust, control signal (on/off, modulating), and fail-safe mode so we can specify or recommend a compatible actuation package. -
Q: Do you provide spare parts for maintenance?
A: Yes, we maintain an inventory of common spare parts such as gland packing sets, gaskets, and seals. We recommend procuring a critical spares kit with your initial valve order to minimize downtime for future maintenance. Parts lists and diagrams are provided for easy identification.
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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