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Help CenterMarine Seawater Strainer CB/T497 A Type, Cast Iron Body for DNV BV Compliant Shipboard Systems
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As a dedicated manufacturer with a strong commitment to maritime safety and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Marine Seawater Strainer, CB/T497 A Type. Engineered with a robust cast iron body, this strainer is specifically designed to meet the stringent requirements of DNV and BV compliant shipboard systems. Since our establishment in 2016, we have focused on delivering high-performance marine components that ensure operational integrity in the harshest marine environments. Our strainer offers a critical first line of defense, protecting vital shipboard equipment from debris and particulate matter in seawater intake lines, thereby enhancing system longevity and reducing maintenance costs.
This product stands out due to its meticulous design and construction tailored for marine applications.
- Rugged Construction: The cast iron body provides exceptional durability and corrosion resistance, essential for prolonged exposure to seawater.
- Standard Compliance: Manufactured in accordance with the CB/T497 A Type standard, ensuring compatibility and reliability within specified marine piping systems.
- Classification Society Alignment: Designed to be compliant with the rules and guidelines of leading classification societies like DNV and BV, facilitating vessel certification.
- Efficient Filtration: Effectively strains solid particles from seawater, protecting pumps, heat exchangers, and other downstream equipment from clogging and damage.
- Versatile Application: Suitable for various seawater intake services on vessels, including cooling water systems, firefighting systems, and ballast water treatment pre-filtration.
- Ease of Maintenance: Features a design that allows for straightforward basket inspection and cleaning, minimizing vessel downtime.
The technical specifications of our Marine Seawater Strainer are detailed below to provide a clear understanding of its capabilities. Please note that specific size (DN) and pressure ratings are available upon request, as we offer a range to suit different system requirements.
| Feature | Specification / Description |
| Product Model | CB/T497 A Type |
| Primary Body Material | Cast Iron |
| Design Standard | Chinese Ship Standard CB/T497 |
| Compliance Target | DNV (Det Norske Veritas) & BV (Bureau Veritas) Rules |
| Application Fluid | Seawater / Marine Water |
| Strainer Basket Material | Stainless Steel (Standard), other materials customizable |
| Connection Type | Flanged (Standard), other ends available |
| Pressure Rating | Designed for standard marine system pressures, specific class upon request |
| Optional Features | Differential pressure gauge, blow-down valve, duplex configuration |
Choosing our strainer brings tangible benefits to ship operators and builders. The cast iron construction ensures a long service life even in corrosive seawater, reducing the frequency and cost of replacements. Adherence to the CB/T497 standard guarantees dimensional interchangeability and fit within standardized Chinese shipbuilding practices. Most importantly, its design for DNV and BV compliance supports smoother classification surveys and approvals, which is a critical path in vessel construction and operation. By preventing debris from entering sensitive machinery, it safeguards against unplanned downtime and expensive repairs, directly contributing to vessel availability and operational efficiency.
Shanghai Zhibang Valve Manufacture Co., Ltd. operates under an ISO9001 certified quality management system, a testament to our consistent manufacturing processes and product reliability. With an annual export value ranging between US$1 Million and US$1.5 Million, we have successfully supplied our marine components, including this seawater strainer, to a diverse global clientele across North America, South America, Europe, Asia, Africa, and Oceania. Our products ship from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring flexible and efficient logistics for our international partners. This strainer embodies our expertise and commitment to the maritime industry. For a reliable, compliant, and durable solution for your shipboard seawater filtration needs, contact us for detailed specifications, pricing, and to discuss custom requirements.
Frequently Asked Questions (FAQ)
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Q: What is the main purpose of this Marine Seawater Strainer?
A: Its primary function is to filter and remove solid particles, such as sand, shells, and marine debris, from seawater before it enters critical shipboard systems like engine cooling, fire mains, or ballast systems. This protects pumps, heat exchangers, and valves from abrasion, clogging, and failure.
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Q: Why is compliance with DNV and BV standards important?
A: DNV and BV are leading international marine classification societies. Their rules set the safety, reliability, and environmental standards for vessel construction and operation. Using equipment designed for compliance simplifies the approval process during shipbuilding, retrofitting, or periodic surveys, ensuring the vessel meets required international regulations.
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Q: Is the cast iron body suitable for seawater service?
A: Yes. Cast iron, when properly specified and often with protective coatings or linings suitable for marine use, offers good mechanical strength and corrosion resistance for seawater applications. It is a commonly used and cost-effective material for strainer bodies in many marine systems.
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Q: Can you provide strainers in sizes other than the standard DN range?
A: Absolutely. While we produce standard sizes per the CB/T497 specification, we can customize the strainer's nominal diameter (DN) and pressure rating to match your specific piping system design and operational requirements. Please provide your specifications for a quotation.
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Q: What is the typical mesh size or filtration level of the strainer basket?
A: The standard basket is designed for coarse straining. The specific mesh size or perforation diameter can be customized based on the level of protection needed for your downstream equipment. Common options are available, and we can advise on the suitable filtration grade for your application.
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Q: Does the strainer require a lot of maintenance?
A: Maintenance is relatively straightforward. The strainer basket needs periodic inspection and cleaning, the frequency of which depends on the water quality and system flow rate. The design allows for easy access to the basket, facilitating quick cleaning with minimal system interruption, especially if a duplex (twin-basket) configuration is used.
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Q: Are installation drawings and documentation provided?
A: Yes, we provide general arrangement drawings, dimensional data, and material specifications with our products. For custom orders, detailed fabrication and installation drawings can be supplied for your engineering review and approval.
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Q: What is your lead time for an order of these strainers?
A: Lead time varies based on order quantity, specifications (standard vs. custom), and current production schedule. For standard CB/T497 A Type models, we generally maintain stock or short production cycles. We provide a confirmed lead time with every formal quotation.
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