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Help CenterMarine Engine Exhaust High Temperature Check Valve 425℃, Carbon Steel, DN50-DN150, Flanged, BV Certified
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Shanghai Zhibang Valve Manufacture Co., Ltd. is a specialized manufacturer with years of experience in producing high-performance valves for marine and industrial applications. Our Marine Engine Exhaust High Temperature Check Valve is engineered to withstand extreme operating conditions, offering reliable backflow prevention in exhaust systems where temperatures reach up to 425°C. Crafted from durable carbon steel and available in sizes DN50 to DN150 with flanged connections, this valve is BV Certified, ensuring compliance with rigorous marine classification standards. Designed for safety and longevity, it is the ideal solution for ship engines, power generation sets, and other high-temperature exhaust lines.
Key Features & Technical Specifications
- High Temperature Resistance: Designed for continuous operation at 425°C, with peak tolerance for occasional overshoots.
- Robust Construction: Body and disc made from high-quality carbon steel (WCB or equivalent) to resist thermal fatigue and corrosion.
- Flanged End Connection: Conforms to PN16/ANSI 150 standards (customizable upon request), easy to install and maintain.
- Swing or Lift Check Design: Available in both swing check and lift check configurations to suit different flow velocities and space constraints.
- BV Certification: Each valve is tested and certified by Bureau Veritas, meeting stringent marine classification rules for fire safety and reliability.
- Leak-Free Sealing: Metal-to-metal or optional soft seat (graphite) ensures minimal backflow leakage at high temperatures.
- Wide Size Range: DN50, DN65, DN80, DN100, DN125, DN150 – standard sizes with short face-to-face dimensions.
- Low Pressure Drop: Optimized disc profile reduces flow resistance, improving overall engine efficiency.
| Parameter | Specification |
|---|---|
| Body Material | ASTM A216 WCB Carbon Steel |
| Disc Material | ASTM A216 WCB / 304 Stainless Steel (optional) |
| Seat Material | Metal (Stellite overlay optional) or Graphite |
| Maximum Temperature | 425°C (800°F) |
| Pressure Rating | PN16 / Class 150 (higher ratings available) |
| Flange Standard | EN 1092-1 / ASME B16.5 |
| Testing | Hydrostatic shell test, seat leakage test per API 598 |
| Certification | BV (Bureau Veritas) Type Approval / Product Certificate |
Benefits for Your Marine Exhaust System
Our check valve prevents dangerous backflow of exhaust gases, protecting the engine from damage and reducing the risk of overheating. The carbon steel construction offers excellent strength-to-weight ratio, making the valve durable yet manageable for installation in confined engine rooms. The flanged design simplifies maintenance and replacement, while the BV certification gives ship owners and operators confidence in the product's safety and compliance with international regulations. Whether used in new builds or retrofits, this valve contributes to smoother operation and extended equipment life.
Why Choose Shanghai Zhibang Valve?
Established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has grown into a reliable supplier for global marine markets, with annual export values exceeding US$1 million. Our valves are shipped from major Chinese ports including Shanghai, Guangzhou, Hong Kong, and Beijing, serving clients across North America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We operate an ISO9001:2015 quality management system, ensuring that every product undergoes rigorous inspection from raw material to final testing. Our experienced engineering team works closely with customers to provide customized solutions, including special end connections, non-standard sizes, and additional certifications (e.g., DNV, ABS, CCS) upon request.
With a strong track record of satisfied customers and a commitment to continuous improvement, Shanghai Zhibang Valve stands ready to support your marine exhaust system requirements. We offer competitive pricing, timely delivery, and comprehensive after-sales support. Contact us today for a quote or technical consultation – let our high-temperature check valve be the reliable component in your vessel’s engine department.
Frequently Asked Questions (FAQ)
Q1: What is the maximum pressure this check valve can handle at 425°C?
A: The standard pressure rating is PN16/Class 150. At 425°C, the allowable working pressure is derated per material standards. Typically, for carbon steel WCB, the maximum working pressure at 425°C is around 10 bar for PN16 bodies. For higher pressures, we recommend upgrading to higher rating (e.g., Class 300) or using alloy steel. Contact our engineers for specific derating factors.
Q2: Is the BV certification valid for all sizes from DN50 to DN150?
A: Yes, our BV certification covers the entire size range mentioned. Each valve is individually inspected and stamped with the BV mark. We can provide a copy of the certificate upon request.
Q3: Can this valve be used for other high-temperature gases besides exhaust?
A: Absolutely. While designed for marine exhaust, the valve can handle other non-corrosive high-temperature gases up to 425°C, such as flue gas in boilers or engine test benches. For corrosive media, we recommend stainless steel or nickel alloy options.
Q4: Do you offer non-standard flange drilling?
A: Yes, custom flange drilling is available. Please provide your flange standard and dimensions, and our team will confirm lead time and pricing.
Q5: What is the typical delivery time for these check valves?
A: For standard sizes (DN50-DN150) and carbon steel material, delivery is usually 15-30 days after order confirmation, depending on quantity. Customized products may require 30-45 days. We always strive to meet urgent requests.
Q6: How does the swing check compare to the lift check version?
A: Swing check valves have lower pressure drop and are suitable for horizontal or vertical upward flow. Lift check valves have a guided disc and can be installed in horizontal or vertical lines, but they have slightly higher pressure drop. Both designs are available; we can recommend based on your piping layout.
Q7: Do you provide spare parts or maintenance kits?
A: Yes, we offer replacement discs, seats, gaskets, and springs. We recommend ordering a maintenance kit with the initial valve for long-term support.
Q8: Can this valve be painted or coated for extra corrosion protection?
A: Yes, we can apply high-temperature resistant paint (e.g., silicone-based) or optional zinc primer. For marine environments, an epoxy coating is also available. Please specify your requirement when placing the order.
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