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Help CenterReliable Marine Check Valve for Ship Steam Boiler Lines, Carbon Steel, Swing Type, DN150, PN2.5MPa, Corrosion Resistant Paint, Factory Tested
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As a direct manufacturer with over 8 years of experience, Shanghai Zhibang Valve Manufacture Co., Ltd takes pride in offering high-quality industrial valves designed for demanding marine environments. Our Marine Check Valve, specifically engineered for ship steam boiler lines, combines robust carbon steel construction with a reliable swing-type mechanism to ensure backflow prevention and system safety. With a DN150 size and PN2.5MPa pressure rating, this valve is ideal for critical applications where leak-free performance and corrosion resistance are non-negotiable. Every unit undergoes rigorous factory testing to guarantee reliability before shipment.
Key Product Features
- Premium Material: Constructed from high-quality carbon steel (ASTM A216 WCB or equivalent), providing excellent strength and durability for high-pressure steam applications.
- Swing Type Design: Features a pivoting disc that opens freely under forward flow and closes quickly upon flow reversal, minimizing pressure drop and preventing water hammer.
- Corrosion Protection: Coated with corrosion-resistant paint (typically epoxy or zinc-rich primer) to withstand harsh marine atmospheres, salt spray, and humidity.
- Factory Testing: Every valve is 100% hydrostatically tested at the factory to ensure zero leakage and compliance with design pressure ratings.
- Easy Installation: Flanged end connections conform to standard dimensions (e.g., DIN2501, ANSI B16.5) for straightforward integration into existing piping systems.
- Low Maintenance: Simple internal structure with minimal moving parts reduces wear and simplifies inspection and servicing.
Technical Specifications
| Parameter | Value |
|---|---|
| Nominal Diameter | DN150 (6 inch) |
| Nominal Pressure | PN2.5MPa (25 bar / 360 psi) |
| Body Material | Carbon Steel (ASTM A216 WCB) |
| Disc Material | Carbon Steel (or optional Stainless Steel upon request) |
| Connection Type | Flanged (RF, FF available) |
| Applicable Medium | Steam, Water, Oil, and other non-corrosive fluids |
| Working Temperature | -29°C to +425°C (depending on sealing material) |
| Design Standard | API 6D, BS 1868 (customizable) |
| Surface Coating | Corrosion-resistant paint (epoxy or zinc-rich) |
| Testing | 100% Factory Hydrostatic Test (1.5 x PN) |
Customer Benefits
- Enhanced Safety: Reliable backflow prevention protects boiler feedwater lines and steam systems from reverse flow damage.
- Extended Service Life: Carbon steel construction and anti-corrosion coating resist degradation from high-temperature steam and marine salt.
- Cost Efficiency: Factory-tested, one-piece design reduces installation time and lowers overall maintenance costs.
- Wide Compatibility: Standard flanged dimensions allow easy replacement of existing valves without modification.
- Global Export Quality: Manufactured under ISO9001 quality management system, ensuring consistent performance for international buyers.
Whether you are building a new vessel or upgrading an existing steam boiler system, this check valve delivers the reliability you need for continuous operation in marine environments. Our dedicated engineering team can also customize the valve (e.g., different pressure classes, end connections, or sealing materials) to match your specific requirements.
Company Trust & Credentials
Since our establishment in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd has grown into a trusted supplier for customers worldwide. With an annual export value exceeding US$1–1.5 million, we ship to over 15 markets including North America, Europe, Southeast Asia, and the Middle East. Our manufacturing facility in Shanghai operates under a certified ISO9001 quality management system, ensuring every valve meets strict international standards. We have successfully supplied check valves, gate valves, and ball valves for numerous marine and industrial projects, earning positive feedback for durability and on-time delivery.
All our products are thoroughly tested before packing, and we offer flexible shipping options from major Chinese ports: Shanghai, Guangzhou, Hong Kong, and Beijing. Our experienced sales team is ready to provide technical support, drawings, and competitive pricing. Choose Shanghai Zhibang for a reliable marine check valve that performs under pressure.
Contact us today for a quote or to request a sample. We look forward to building a long-term partnership with you!
Frequently Asked Questions (FAQ)
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Q: What materials are used for the sealing seat?
A: The standard seat is integral to the carbon steel body. Optional stainless steel or stellite facings are available for higher temperature or abrasive media. -
Q: Can this valve be used for seawater?
A: Carbon steel with corrosion-resistant paint is suitable for splash zones, but for continuous seawater exposure, we recommend a stainless steel version (e.g., CF8M). Please inquire. -
Q: What is the lead time for DN150 PN2.5MPa swing check valves?
A: Typical lead time is 15–30 working days, depending on quantity and coating requirements. We can expedite for urgent orders. -
Q: Does the valve come with a certificate of factory test?
A: Yes, each valve includes a factory hydrostatic test certificate. Third-party inspection (e.g., Lloyd's, BV) is available at extra cost. -
Q: What flange drilling standard does the valve comply with?
A: The valve is manufactured to DIN 2501 (PN2.5MPa) drilling as standard. ANSI B16.5 Class 150 and other standards are customizable. -
Q: Can I install this valve vertically?
A: Swing check valves are generally recommended for horizontal installation. For vertical lines, please consult our engineers for a spring-assisted version. -
Q: What is the warranty period?
A: We offer a 12-month warranty against manufacturing defects from the date of shipment. Extended warranty available upon request. -
Q: Do you provide samples for qualification?
A: Yes, we can supply samples with full payment and delivery. For trusted customers, sample fees may be negotiable.
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