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Help Center12-Month Warranty Marine Check Valve for Steam System, Mill Test Report Included, Carbon Steel, DN50-DN150, Full Traceability, Standard Compliant
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As a trusted manufacturer based in Shanghai, China, Shanghai Zhibang Valve Manufacture Co., Ltd has been dedicated to producing high-quality industrial valves since 2016. Our 12-Month Warranty Marine Check Valve for Steam System is engineered to deliver reliable performance and long service life in demanding marine and steam applications. Each valve is manufactured from premium Carbon Steel (DN50-DN150) and comes with a Mill Test Report and full traceability, ensuring complete material and production transparency. With an annual export value exceeding US$1 million, we serve clients across more than 15 global regions, backed by our ISO9001 certified quality management system.
This check valve is specifically designed for steam systems where backflow prevention is critical. The valve body and internal components are crafted from robust carbon steel, offering excellent resistance to high temperature and pressure conditions typical of steam applications. The full traceability system allows every valve to be tracked from raw material procurement through final inspection, providing you with unmatched confidence in product quality. Whether you need a DN50, DN100, or DN150 size, we can supply standard compliant valves that meet ASME/ANSI, DIN, or JIS specifications upon request.
Product Features & Technical Specifications
- Material Excellence: WCB carbon steel body, stainless steel or alloy steel disc/seat options available for enhanced corrosion resistance.
- Size Range: DN50 to DN150 (2" to 6"), suitable for a wide variety of pipeline systems.
- Pressure Rating: Class 150 to Class 300 (PN16 to PN40) – consult our team for custom pressure requirements.
- Temperature Range: Designed for steam temperatures up to 425°C (depending on materials and pressure class).
- Design Standard: API 602, BS 1868, ASME B16.34 compliant, ensuring interchangeability and safety.
- Leakage Performance: Soft or metal seat sealing – zero leakage at low pressure, meeting API 598 requirements.
- End Connections: Flanged ends per ASME B16.5 (RF or FF, available in 150# and 300#).
- Operation: Automatic – disc opens with forward flow and closes when flow reverses, preventing backflow damage.
- Testing: 100% hydrostatic shell test and seat test; Mill Test Report (MTR) included with each valve.
- Warranty: 12 months from date of shipment, covering manufacturing defects under normal use.
| Parameter | Value / Description |
| Body Material | Carbon Steel (ASTM A216 WCB) |
| Disc Material | Stainless Steel (SS304/316) or Alloy Steel (optional) |
| Seat Material | Stellite (hardfacing) or PTFE (soft seat) optional |
| Size Range | DN50, DN65, DN80, DN100, DN125, DN150 |
| Pressure Class | 150# / 300# (PN16 / PN25 / PN40 available) |
| Working Temperature | -29°C to +425°C (material dependent) |
| Applicable Media | Steam, hot water, condensate, non-aggressive gases |
| Traceability | Full material traceability with heat numbers and inspection records |
Our marine check valve offers distinct advantages for steam system operators:
- Enhanced Safety: Prevents reverse flow that can cause water hammer or pressure surges in steam lines.
- Reduced Maintenance: Durable carbon steel body and hardened trim options extend service intervals.
- Standard Compliance: Manufactured per ASME, API, and ISO standards, ensuring seamless integration into existing systems.
- Complete Documentation: Mill Test Report, pressure test certificates, and material certificates accompany every order.
At Shanghai Zhibang Valve Manufacture Co., Ltd, we are committed to delivering products that meet the highest quality standards. Our ISO9001 certified facility, combined with over eight years of valve manufacturing experience and a growing annual export value of US$1–1.5 million, demonstrates our reliability. We have supplied valves to markets across North America, South America, Europe, Asia, Africa, and Oceania, earning trust through consistent quality and on-time delivery. Each marine check valve carries a 12-month warranty and full traceability, giving you peace of mind. We invite you to contact our team for technical details, pricing, or custom requirements – let us show you why our valves are the right choice for your steam system.
Frequently Asked Questions (FAQ)
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Q: Can this check valve be used for other media besides steam?
A: Yes, the valve is designed for steam but is also suitable for hot water, condensate, and other non-aggressive fluids. For aggressive media, consider optional stainless steel or alloy trims. Please consult our engineers. -
Q: How is the 12-month warranty enforced?
A: The warranty covers manufacturing defects under normal operating conditions. In the event of a defect within 12 months from shipment, we will provide a replacement or repair at no charge, subject to our warranty policy. -
Q: What does “full traceability” mean for this product?
A: Full traceability means every valve has a unique serial number that links to its raw material heat numbers, production batch, inspection reports, and test results. This enables complete product history tracking from foundry to final assembly. -
Q: What information is included in the Mill Test Report (MTR)?
A: The MTR includes chemical composition, mechanical properties (tensile, yield, hardness), heat treatment details, and dimensional verification of the valve body and other pressure-containing parts. -
Q: Are flanges included with the valve? What standard do they follow?
A: Flanges are an integral part of the valve body. They are manufactured per ASME B16.5 (Class 150 or 300, RF or FF). Other standards such as DIN or JIS are available upon request. -
Q: What is the typical lead time for DN50-DN150 marine check valves?
A: Standard sizes in common materials are often stocked or have a lead time of 2–4 weeks. Custom specifications may require 4–6 weeks. Please contact us for current stock availability. -
Q: Can I get a higher pressure class, such as Class 600?
A: Yes, we can manufacture check valves in higher pressure classes (e.g., Class 600, PN100) on request. The price and delivery time may vary. Please provide your detailed requirements. -
Q: Do you have experience exporting to my region?
A: Our products are exported to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We work with reliable logistics partners and can accommodate delivery via Shanghai, Guangzhou, Hong Kong, or Beijing ports.
Note: All technical data and specifications are subject to change without notice. For precise engineering details, please request our official datasheet. We are always ready to assist with your valve selection.
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