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Help CenterMarine Check Valve for Shipboard FGD System, Prevents Backflow in Desulfurization Tower Outlet
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Shanghai Zhibang Valve Manufacture Co., Ltd. (established in 2016) is a professional manufacturer specializing in high-quality valves for marine and industrial applications. With an annual export value of US$1 Million to US$1.5 Million, we have supplied our products to major markets across North America, South America, Europe, Southeast Asia, Africa, and Oceania. Our Marine Check Valve for Shipboard FGD System is specifically engineered to prevent backflow in desulfurization tower outlets, ensuring reliable operation in harsh shipboard environments. Every valve is manufactured under our ISO9001:2015 certified quality management system, guaranteeing consistent performance and long service life.
Product Overview
This check valve is designed to prevent reverse flow of corrosive desulfurization slurry and flue gas condensate back into the FGD system. It is built to withstand high temperatures, saltwater exposure, and abrasive particles commonly found in shipboard scrubber systems. Available in swing check, lift check, and dual plate configurations, our valve provides minimal pressure drop, quick response, and excellent sealing even at low flow rates. Key features include:
- Corrosion-resistant materials: Choose from stainless steel, duplex stainless steel, or bronze to match your seawater and chemical compatibility requirements.
- Low-pressure drop design: Optimized disc profile reduces energy loss and maintains system efficiency.
- Tight sealing: Metal-to-metal or resilient seat options ensure bubble-tight backflow prevention.
- Compact construction: Wafer and lug style bodies save space in tight shipboard installations.
- High temperature tolerance: Standard models operate from -20°C to 150°C, with extended range available upon request.
- Easy maintenance: Top-entry or split-body designs allow quick inspection and part replacement.
Technical Specifications (refer to table below for typical parameters):
| Parameter | Standard Value | Customization |
|---|---|---|
| Nominal Size | DN50 – DN600 (2" – 24") | Optional larger sizes |
| Pressure Rating | PN10 / PN16 / Class 150 | Up to Class 300 on request |
| Connection Type | Flanged (ASME B16.5 or DIN) / Wafer / Lug | Other standards available |
| Material Options | SS304, SS316, Duplex 2205, Bronze | Super Duplex, Hastelloy on request |
| Seat Material | Metal (Stellite) / PTFE / NBR/EPDM | Customer specified |
| Operating Temperature | -20°C to +150°C | Up to 250°C with special design |
Advantages for Your Shipboard FGD System
- Reliable backflow prevention: Protects pumps and upstream equipment from reverse flow of acidic slurry, preventing damage and downtime.
- Long service life: Our valves are built with heavy-duty materials and advanced coating processes to resist erosion and corrosion.
- Low maintenance: The simple mechanical design minimizes moving parts, reducing the need for frequent servicing.
- Compliance with marine standards: Designed to meet classification society requirements (optional witness test available).
- Global logistics support: Shipped from Shanghai, Guangzhou, Hong Kong or Beijing ports with efficient export documentation.
Why Choose Shanghai Zhibang Valve?
With over 8 years of manufacturing experience, we have supplied thousands of valves to marine FGD projects worldwide. Our ISO9001:2015 certified factory ensures strict quality control from raw material inspection to pressure testing and final packaging. We offer competitive pricing, fast lead times (usually 15–30 days), and after-sales technical support. Our export value of over US$1 million annually demonstrates the trust from global clients. Whether you need a standard check valve or a custom-engineered solution, our team is ready to assist. Contact us today for a quote or technical consultation – let us help you optimize your shipboard desulfurization system reliability.
Frequently Asked Questions
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Q: What is the main function of this check valve in an FGD system?
A: It prevents reverse flow of desulfurization slurry or condensate from the tower outlet back into upstream piping, protecting pumps and ensuring system integrity. -
Q: Can this valve be used for seawater service?
A: Yes, we offer material options like duplex stainless steel or bronze specifically for seawater applications, providing excellent corrosion resistance. -
Q: What is the typical pressure drop across the valve?
A: Our dual plate and swing check designs have an optimized low-pressure drop, typically less than 0.5 bar at full flow. Exact values depend on size and flow rate – we provide Cv data upon request. -
Q: Do you provide certificates for marine classification?
A: Yes, we can arrange inspection and certification by classification societies (e.g., DNV, ABS, Lloyd's) as a third-party service. Please specify your requirements. -
Q: What is the minimum order quantity?
A: For standard sizes (DN50–DN200), MOQ is 1 piece. For larger sizes or custom designs, please contact our sales team for flexibility. -
Q: How do I choose between swing check, lift check, and dual plate types?
A: Swing check is best for low-velocity systems; lift check for vertical flows; dual plate offers compact size and faster closing. We can recommend based on your piping layout and flow conditions. -
Q: Are spare parts available?
A: Yes, we supply replacement seats, discs, springs, and gaskets. Most parts are kept in stock for quick delivery. -
Q: What is the warranty period?
A: Our standard warranty is 12 months from shipment date. Extended warranty may be negotiated.
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