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Help CenterFlanged Butterfly Check Valve for Marine Fuel & Ballast Systems, DNV/BV Standard Compliant
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As a professional manufacturer with a focus on marine and industrial fluid control, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our specialized Flanged Butterfly Check Valve. Engineered specifically for the demanding environments of marine fuel transfer and ballast water systems, this valve represents a critical component for vessel safety and operational efficiency. Since our establishment in 2016, we have dedicated our expertise to producing valves that meet the stringent requirements of global maritime standards. This particular valve is designed to prevent backflow effectively, ensuring the unidirectional flow essential for system integrity and preventing costly contamination or pressure surges in sensitive marine piping networks.
Our commitment to quality, evidenced by our ISO9001 certification, is embedded in every valve we produce. We understand that reliability at sea is non-negotiable, which is why this valve is built to comply with recognized marine standards such as DNV and BV, offering shipbuilders and operators a dependable solution they can trust. With an annual export value reflecting our global reach across continents from North America to Oceania, our products are proven in diverse maritime applications.
Core Design Features & Technical Advantages:
- Optimized Disc Design: The butterfly disc is precision-engineered for low-pressure drop and swift, positive closure upon flow reversal. Its lightweight construction minimizes water hammer, protecting downstream equipment.
- Robust Flanged Connection: Available in various flange standards (RF, RTJ), ensuring a leak-proof, secure, and easy installation into existing marine piping systems.
- Material Versatility: We offer a range of body materials like cast steel (WCB) for general service or stainless steel (CF8/CF8M) for corrosive ballast water, paired with durable seat materials like EPDM or Viton for specific fluid compatibility.
- Compact & Space-Saving: The wafer or lug-style design provides a significant space and weight advantage over traditional swing check valves, a crucial factor in ship design.
- Maintenance-Friendly: Many models feature a resilient seated design, allowing for easy inline maintenance or seat replacement without removing the valve body from the pipeline.
Technical Specifications Table:
| Parameter | Specification / Option |
| Size Range (DN) | 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600 |
| Pressure Rating | PN10, PN16, ANSI Class 150, Class 300 |
| Body Material | Cast Carbon Steel (WCB), Ductile Iron, Stainless Steel 304/316, Duplex Steel |
| Disc Material | Stainless Steel (Standard), with optional Nickel Plating or Epoxy Coating |
| Seat Material | EPDM (Water, Fuel), NBR (Oil), Viton (Chemicals), PTFE (High Temp) |
| Temperature Range | -20°C to +120°C (varies with seat material) |
| End Connection | Flanged (RF, RTJ, FF). Standards: ANSI, DIN, JIS, BS, GB |
| Face-to-Face | Compact, conforming to API 594 or API 609 dimensions |
Benefits for Your Marine Operations:
- Enhanced System Safety: Prevents dangerous backflow in fuel lines, avoiding cross-contamination and ensuring ballast systems operate as designed, which is critical for vessel stability.
- Reduced Operational Costs: Low flow resistance translates to lower pumping energy requirements. Its durability minimizes unplanned downtime and maintenance expenses.
- Regulatory Compliance Ease: Designed and manufactured with DNV, BV, and other major marine standard requirements in mind, simplifying the approval process for new builds or retrofits.
- Global Supply Chain Support: With major shipment ports like Shanghai, Guangzhou, and Hong Kong, we ensure timely and flexible delivery to shipyards and ports worldwide.
- Customization Capability: As a manufacturer, we can tailor materials, coatings, pressure ratings, and flange standards to meet specific project specifications or unusual service conditions.
Choosing Shanghai Zhibang's Flanged Butterfly Check Valve means partnering with a dedicated manufacturer whose products are trusted in global markets from Eastern Europe to Southeast Asia and beyond. Our ISO9001-certified quality management system governs every step of production, from material sourcing to final testing, ensuring consistent performance. The proven track record of our valves operating reliably in diverse marine environments across our main markets serves as a strong testament to their design and build quality. We invite you to leverage our manufacturing expertise to secure a robust, compliant, and cost-effective check valve solution for your marine fuel and ballast systems. Contact us today to discuss your project requirements, request detailed specifications, or obtain a competitive quotation tailored to your needs.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of a butterfly check valve over a swing check valve for marine use?
A: Butterfly check valves offer a more compact and lightweight design, which saves crucial space and weight on vessels. They also typically have a faster closing action, reducing the potential for water hammer, and are often easier to install between flanges. -
Q: Can this valve be used for both fuel oil and seawater ballast?
A: Yes, but material selection is key. For fuel oil, standard carbon steel body with NBR or Viton seats is common. For seawater ballast, we recommend a stainless steel body (e.g., 316) with EPDM or specially compatible seats to resist corrosion and biological fouling. -
Q: What does 'DNV/BV Standard Compliant' mean in practice?
A: It means the valve is designed, manufactured, and tested according to the relevant rules and guidelines published by classification societies like DNV (Det Norske Veritas) and BV (Bureau Veritas). This can cover materials, design calculations, pressure testing, and documentation, facilitating approval for use on classed vessels. -
Q: Is the valve suitable for vertical pipe installation?
A: Yes, butterfly check valves can generally be installed in horizontal or vertical pipelines with upward flow. It is important to specify the intended orientation during inquiry so we can confirm the design suitability. -
Q: Do you provide specific certification documents with the valves?
A: We provide standard material certificates (MTC), factory test reports (hydrostatic, shell, seat tests), and a certificate of compliance. Specific classification society certificates (DNV, BV type approval) are available upon request and may involve additional testing and costs. -
Q: What is the typical delivery lead time for an order?
A: Lead time varies based on order quantity, size, material specifications, and customization. For standard configurations, typical production lead time ranges from 4 to 8 weeks. We provide accurate timelines upon receipt of your detailed inquiry. -
Q: How do I determine the correct pressure rating (PN vs. Class) for my system?
A: The pressure rating must match or exceed the maximum working pressure of your piping system. PN ratings (e.g., PN16) are common in European standards, while Class ratings (e.g., Class 150) are used in ANSI systems. Our technical team can assist you in selecting the appropriate rating based on your system design pressure and temperature. -
Q: What kind of after-sales support do you offer?
A: We provide technical documentation, installation guidance, and support for spare parts (like seat rings) throughout the valve's service life. As the manufacturer, we ensure long-term availability of critical components.
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