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Help CenterMarine Check Valve for LNG Carrier, 2 Year Warranty, Mill Test Report Included, Stainless Steel Body
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Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance marine check valves designed for the demanding environment of LNG carriers. Our Stainless Steel Marine Check Valve is engineered to deliver reliable, leak-proof sealing in cryogenic conditions, ensuring the safe and efficient transport of liquefied natural gas. With a 2-year warranty and a comprehensive Mill Test Report included with every unit, we provide the traceability and quality assurance that marine and offshore operators require.
As an ISO9001-certified manufacturer established in 2016, we combine advanced machining capabilities with strict quality control to produce check valves that meet the highest industry standards. Our valves are widely used in LNG carrier ballast systems, cargo handling lines, vapor return lines, and other critical cryogenic circuits. The stainless steel body offers excellent corrosion resistance and durability in harsh marine environments.
Key Features & Technical Specifications
- Cryogenic Design: Optimized for LNG temperatures down to -196°C, with special low-temperature seat materials (PTFE, PCTFE) to ensure bubble-tight shut-off.
- Stainless Steel Body: Available in SS316, SS316L, or SS304 for superior resistance to seawater, acidic condensates, and corrosion.
- Multiple End Connections: Flanged (ANSI 150/300/600, DIN, JIS) or butt-weld ends – customizable to your piping specifications.
- Low Pressure Drop: Smooth flow path and optimized disc design minimize pressure loss, improving system efficiency.
- Rapid Closing Mechanism: Spring-loaded or swing-type disc options ensure quick response and prevent reverse flow even under low differential pressure.
- Full Traceability: Each valve comes with a Mill Test Report verifying material chemical composition and mechanical properties.
- 2-Year Warranty: Covers manufacturing defects and performance reliability under normal operating conditions.
Technical Parameters (Example)
| Parameter | Value/Range |
| Size Range | 2" – 24" (DN50 – DN600) |
| Pressure Rating | Class 150, 300, 600 (PN10 – PN100) |
| Temperature Range | -196°C to +80°C |
| Body Material | SS316 / SS316L / SS304 |
| Seat Material | PTFE, PCTFE (cryogenic grade) |
| Standard Compliance | ISO9001, ASME B16.34 (upon request) |
Advantages & Customer Benefits
By choosing our marine check valve, you gain:
- Enhanced Safety: Reliable backflow prevention protects pumps, compressors, and cargo systems from damage and contamination.
- Operational Efficiency: Low cracking pressure and streamlined flow reduce energy consumption and maintenance intervals.
- Reduced Downtime: Robust stainless steel construction and certified materials extend service life even in continuous cryogenic cycling.
- Full Documentation: Mill Test Reports and material certificates simplify project documentation and regulatory compliance (e.g., DNV, ABS, Lloyd's – optional third-party inspection available).
- Flexible Configuration: Optional spring-loaded design for horizontal or vertical installation, or swing-type for low-pressure applications.
Trusted by Global Markets
Shanghai Zhibang Valve Manufacture Co., Ltd. has been a reliable partner in the valve industry since 2016. With an annual export value of US$1–1.5 million, our products are shipped to North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and beyond. We serve shipbuilders, LNG terminal operators, and marine engineering companies with valves that meet rigorous international standards. Each order benefits from our experienced engineering team, strict quality inspections, and responsive after-sales support.
We understand that every LNG carrier project has unique requirements. That is why we offer flexible customization – from end connections and pressure classes to special coatings or third-party certifications. Our Mill Test Report and 2-year warranty give you complete confidence in the product's performance. Contact us today to discuss your specific valve needs or request a quote. Choose Shanghai Zhibang for quality, traceability, and peace of mind.
Frequently Asked Questions
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Q: What is the typical lead time for a marine check valve?
A: Lead time depends on size and quantity. Standard sizes (2"–12") are typically 15–25 working days. Larger or custom valves may require 30–45 days. Please confirm with our sales team. -
Q: Can the valve be used for other cryogenic media besides LNG?
A: Yes, the valve is suitable for other cryogenic fluids such as liquid nitrogen, liquid ethylene, and LPG, provided that the temperature and pressure are within the specified range. Always verify material compatibility with the specific medium. -
Q: Does the 2-year warranty cover wear parts like seats and seals?
A: The warranty covers manufacturing defects and performance failure under normal operating conditions. Normal wear of soft seats or gaskets is not covered unless a defect is proven. Please refer to our warranty policy for details. -
Q: What certifications are available for the valve?
A: Our valves are manufactured under ISO9001 quality management system. We can also arrange third-party inspection (e.g., DNV, ABS, BV, Lloyd's) at additional cost and lead time. The Mill Test Report is always included for material traceability. -
Q: Is the valve suitable for horizontal and vertical piping?
A: Yes, we offer spring-loaded check valves that can be installed in any orientation, including vertical flow upward. Swing-type check valves are typically recommended for horizontal or upward flow only. -
Q: How do I select the correct pressure rating for my LNG carrier system?
A: The required pressure class depends on the maximum operating pressure of your system. For typical LNG cargo handling systems, Class 150 or 300 is common. Our engineers can assist you in selecting the appropriate rating based on your design conditions. -
Q: Do you provide alternative seat materials for high-temperature purge cycles?
A: For applications requiring occasional warm-up or purge cycles up to +80°C, standard PTFE seats are adequate. For higher temperature excursions, we offer PCTFE or reinforced PTFE options. Please specify your temperature profile when ordering. -
Q: What packing and shipping options are available?
A: Valves are individually packed in wooden cases or crates with proper cushioning to prevent damage during sea freight. We ship from Shanghai, Guangzhou, Hong Kong, or Beijing ports, depending on your destination and schedule.
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