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CB/T3591 Marine Gate Valve For Freshwater, Epoxy Coated, Full Port Design
Product Spotlights
CB/T3591 standard marine gate valve designed specifically for freshwater systems. Features a durable epoxy coating internally and externally for superior corrosion resistance. Full port design ensures minimal flow restriction and pressure loss. Robust construction with material options like cast iron and bronze. Suitable for ballast, cooling, and fire-fighting lines on vessels, offering reliable performance and extended service life with low maintenance.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Other, Cast Iron / Ductile Iron / Bronze (Body & Trim)
Standard:
Other, CB/T3591
Coating:
Epoxy Coated (Internal & External)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Cast Iron / Ductile Iron / Bronze (Body & Trim)
Standard
Other, CB/T3591
Coating
Epoxy Coated (Internal & External)
Port Design
Full Port
Application Fluid
Freshwater / Potable Water
Connection Type
Flanged
Operation Type
Handwheel / Gearbox (Optional)
Pressure Rating
PN10 / PN16 / PN25 (Customizable)
Size Range
DN50 to DN600 (Available upon request)
As a professional valve manufacturer based in Shanghai with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly introduces our CB/T3591 Marine Gate Valve for Freshwater. Engineered specifically for demanding marine and offshore applications, this valve is designed to provide reliable, long-lasting performance in freshwater systems. Our commitment to precision manufacturing and rigorous testing ensures that every valve meets the stringent requirements of maritime operations, offering shipbuilders, shipyards, and marine engineers a dependable solution for flow control.
The core value of this valve lies in its robust construction combined with specialized protection. The full port design ensures minimal pressure drop and unrestricted flow, which is crucial for efficient system performance. More importantly, the epoxy coating, applied both internally and externally, provides superior corrosion resistance against freshwater, extending the valve's service life significantly even in harsh marine environments. This makes it an ideal choice for ballast systems, fire-fighting lines, cooling water circuits, and other critical freshwater services on vessels and offshore platforms.
Key Features & Technical Advantages:
- Superior Corrosion Protection: The high-performance epoxy coating forms a durable, chemically resistant barrier that prevents rust and scaling, ensuring the purity of freshwater and maintaining system integrity.
- Full Port Design: Offers a flow area equal to the pipeline's inner diameter, reducing turbulence and pressure loss, which enhances overall system efficiency and reduces pumping costs.
- Robust Construction: Manufactured in compliance with the Chinese CB/T3591 standard for marine valves, ensuring dimensional accuracy, material strength, and performance reliability.
- Smooth Operation: The rising stem design with precision-machined threads allows for easy opening and closing, even after prolonged periods of inactivity. Optional gearbox operation is available for larger sizes.
- Bubble-Tight Shut-off: The wedge disc design, paired with a resilient seat (optional), ensures a reliable, leak-proof seal in the closed position, critical for system isolation.
- Versatile Material Options: The valve body and trim are available in various materials such as cast iron, ductile iron, or bronze to suit different pressure ratings and specific application requirements.
- Low Maintenance: The simple, robust design requires minimal maintenance. The epoxy coating reduces fouling and scaling, further decreasing downtime.
Technical Specifications:
| Parameter | Specification |
| Design Standard | CB/T3591 (Marine Valves) |
| Nominal Pressure | PN10, PN16, PN25 (Customizable) |
| Size Range | DN50 (2") to DN600 (24") |
| Port Type | Full Port |
| Connection | Flanged (RF/FF), as per standard |
| Body Material | Cast Iron, Ductile Iron, Bronze |
| Disc & Stem Material | Bronze, Stainless Steel (Optional) |
| Seat Material | Bronze / Resilient Seat (Optional) |
| Coating | Epoxy Coating (Internal & External) |
| Operation | Handwheel (Standard), Gearbox (Optional for DN300+) |
| Test Standard | Shell Test & Seat Test per CB/T3591 |
Benefits for Your Project:
- Enhanced System Longevity: The epoxy coating drastically reduces corrosion-related failures, lowering lifetime costs and unexpected downtime.
- Optimized Flow Efficiency: Full port design maximizes flow capacity, which can lead to energy savings in pumped systems.
- Regulatory Compliance: Conforms to the recognized CB/T3591 marine standard, facilitating approval processes in shipbuilding and repair.
- Reduced Maintenance Burden: Durable construction and protective coating translate into fewer inspections, less cleaning, and reduced spare part inventory.
- Global Supply Reliability: With annual exports valued between US$1-1.5 million and shipment ports including Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely and reliable delivery to your projects worldwide, from North America and Europe to Southeast Asia and Africa.
Shanghai Zhibang Valve, established in 2016, has built a solid reputation by supplying quality valves to a diverse global market. Our ISO9001 certification underpins our commitment to consistent quality and process control. The widespread acceptance of our products across North America, South America, Europe, Asia, Africa, and Oceania is a testament to their reliability and performance. When you choose our CB/T3591 Marine Gate Valve, you are not just purchasing a component; you are investing in a solution backed by manufacturing expertise, international shipping capability, and a proven track record in serving the global marine industry. For a durable, efficient, and compliant valve solution for your freshwater applications, contact us for detailed specifications or a quotation.
Frequently Asked Questions (FAQ):
-
Q: What is the primary advantage of the epoxy coating on this gate valve?
A: The epoxy coating provides excellent corrosion and chemical resistance specifically against freshwater. It protects both the internal bore and external surfaces, preventing rust, scaling, and biofilm formation, which ensures water quality and significantly extends the valve's operational life in marine environments. -
Q: Can this valve be used with seawater or other corrosive fluids?
A: This valve is specifically designed and coated for freshwater service (potable water, ballast water, cooling water). For seawater or more aggressive fluids, different material combinations (like full bronze or stainless steel) and specialized coatings would be required. Please inquire for valves suited for those media. -
Q: What does "Full Port" design mean, and why is it important?
A: "Full Port" (or Full Bore) means the internal diameter of the valve opening is essentially the same as the inner diameter of the connecting pipeline. This design minimizes flow restriction, reduces pressure drop, and allows for easier passage of pigs or cleaning tools, which is crucial for maintaining system efficiency. -
Q: Is the CB/T3591 standard recognized internationally?
A: CB/T is a Chinese national standard. CB/T3591 is the specific standard for marine gate valves. While it may not be identical to ISO or other regional standards, it is a well-established and respected specification within the global marine industry, particularly for projects involving Chinese shipyards or owners. Its requirements for dimensions, materials, and testing ensure reliable performance. -
Q: Do you offer actuators for automated operation?
A: While the standard configuration includes a handwheel (or gearbox for larger sizes), we can provide valves prepared for the installation of electric, pneumatic, or hydraulic actuators. The valve design includes a standard mounting pad to facilitate this. Actuator selection and supply can be arranged upon request. -
Q: What is the lead time for an order of these valves?
A: Lead time depends on the size, material, pressure rating, and order quantity. Standard configurations typically have shorter lead times. We ship from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, which allows for flexible logistics. Please contact us with your specific requirements for an accurate delivery schedule. -
Q: Are spare parts like gland packings and gaskets readily available?
A: Yes. We maintain an inventory of common spare parts for our valves. We recommend ordering a set of critical spares (like gland packing, gaskets) with your initial valve order to ensure quick maintenance when needed. Spare part kits are available. -
Q: What quality control measures are in place during manufacturing?
A> Our production is governed by an ISO9001 quality management system. Each valve undergoes material inspection, dimensional checks, and rigorous pressure testing (shell test and seat test) as mandated by the CB/T3591 standard before shipment. Test reports can be provided.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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