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Help Center304 Stainless Steel Marine Steam Check Valve, 250°C High Temperature, DN80-DN200, PN2.5MPa, Threaded or Flanged, Corrosion Resistant
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Welcome to Shanghai Zhibang Valve Manufacture Co., Ltd. – a professional valve manufacturer established in 2016, with annual export value ranging from US$1 Million to US$1.5 Million and an ISO9001 certified production system. Our 304 Stainless Steel Marine Steam Check Valve is engineered to deliver reliable performance in demanding high-temperature steam applications aboard ships and offshore facilities. Rated for continuous operation at 250°C and designed to withstand PN2.5MPa pressure, this valve provides exceptional corrosion resistance and long service life, making it a trusted component for marine engineers worldwide.
Available in sizes from DN80 to DN200, with either threaded or flanged connections, this check valve prevents reverse flow of steam and other non-aggressive media in piping systems. The 304 stainless steel body ensures outstanding resistance to rust, saltwater, and chemical corrosion, while the internal disc and seat are precision-machined for tight shut-off. Whether you need a compact threaded design for confined spaces or a flanged model for robust industrial pipelines, our valve meets the highest standards of marine and industrial safety.
Key Features & Benefits
- Premium 304 Stainless Steel Construction – Excellent resistance to seawater, steam condensate, and corrosive fluids, ensuring minimal maintenance and extended lifespan.
- High Temperature Capability – Rated for continuous service up to 250°C, suitable for superheated steam and hot condensate lines.
- Rugged Pressure Rating – PN2.5MPa (approximately 362 psi) working pressure, suitable for medium-pressure steam systems in marine and industrial environments.
- Versatile Connection Options – Available in threaded (BSP, NPT) or flanged (DIN, ANSI) ends, making it compatible with various piping standards.
- Low Pressure Drop – Streamlined flow path design minimizes head loss, enhancing system efficiency.
- Easy Installation & Maintenance – Compact structure with replaceable disc and seat, simplifying field service.
- ISO9001 Quality Management – Manufactured under strict quality control from raw material inspection to final testing.
Technical Specifications
| Parameter | Value |
| Material | 304 Stainless Steel (Body, Disc, Spring) |
| Max Operating Temperature | 250°C |
| Nominal Diameter (DN) | DN80, DN100, DN125, DN150, DN200 |
| Pressure Rating | PN2.5MPa (25 bar / 362 psi) |
| Connection Type | Threaded (BSP/NPT) or Flanged (DIN/ANSI) |
| Design Standard | GB/T 12235, API 602 (Applicable) |
| Applicable Medium | Steam, Hot Water, Condensate, Air, Oil |
| Certification | ISO9001 |
Why Choose Our Marine Steam Check Valve?
- Superior Corrosion Resistance – 304 stainless steel withstands saltwater spray, humid marine atmospheres, and aggressive condensate, reducing replacement frequency.
- Proven Reliability – Each valve undergoes hydrostatic testing and seat leakage test before shipment, ensuring zero backflow.
- Global Compatibility – Available with threaded or flanged ends to match international piping standards (BSP, NPT, DIN, ANSI).
- Customizable Solutions – Options for different spring loads, disc materials (e.g., PTFE coating), and face-to-face dimensions upon request.
- Efficient Operation – Low cracking pressure and smooth disc movement minimize pressure drop, improving system energy efficiency.
Company Strength & Trust
As a specialized valve manufacturer since 2016, Shanghai Zhibang Valve has built a strong reputation in the global market. Our annual export value of US$1–1.5 Million reflects the trust placed in our products by customers across North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and beyond. We ship from multiple ports in China: Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery worldwide.
Our ISO9001 certified quality management system guarantees consistent product quality – from sourcing 304 stainless steel to final assembly and testing. We have served marine engineering companies, shipyards, and industrial steam system integrators who value durability and performance. Every valve is backed by our technical support team, ready to assist with selection, installation, and maintenance advice.
If you’re looking for a reliable, high-temperature check valve for your marine or industrial steam system, our 304 Stainless Steel Marine Steam Check Valve is the right choice. Contact us today for a quote or to discuss custom requirements. We are committed to providing cost-effective solutions without compromising quality.
Frequently Asked Questions (FAQ)
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Q: Can this valve be used for saturated steam above 250°C?
A: The maximum continuous operating temperature is 250°C. For higher temperatures, we can offer a customized valve with alternative materials (e.g., 316 stainless steel or alloy steel). Please contact our sales team. -
Q: What is the difference between threaded and flanged versions?
A: Threaded ends (BSP or NPT) are suitable for smaller pipe diameters and compact installations. Flanged ends (DIN or ANSI) provide stronger, leak-proof connections for larger pipelines and higher torque applications. Both options are available from stock or on order. -
Q: Is this valve suitable for seawater applications?
A: Yes, 304 stainless steel offers good resistance to seawater corrosion. However, for prolonged exposure or highly saline environments, we recommend our 316L or duplex stainless steel variants for enhanced pitting resistance. -
Q: Can the valve be installed vertically or horizontally?
A: The valve can be installed in any orientation, but for optimal performance, we recommend horizontal installation with the disc hanging vertically. When installed vertically, ensure the flow direction is upward to facilitate disc movement. -
Q: What is the pressure drop across the valve at full flow?
A: The pressure drop depends on size and flow rate. Typically, the flow coefficient (Cv) ranges from 50 to 400 for DN80 to DN200 sizes. Our technical datasheet provides detailed Cv values; request it from our sales team. -
Q: Does the valve come with a test certificate?
A: Yes, each valve comes with a material certificate and a hydrostatic test report. Additional third-party inspection (e.g., by Lloyd’s, ABS, or DNV) can be arranged at extra cost. -
Q: What is the typical lead time for this product?
A: For standard sizes and connections (DN80–DN150, threaded or flanged), lead time is approximately 15–25 working days. Custom orders or larger sizes may require 30–45 days. Express delivery is available upon request. -
Q: Is the valve repairable or replaceable in the field?
A: Yes, the internal components (disc, seat, spring) are replaceable. We provide a maintenance kit and clear instructions. For complex repairs, our technical team can assist via video call or on-site visit (subject to agreement).
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