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Help CenterDN50-DN800 Marine Hard Seal Butterfly Valve, PN10 Rated for 425°C Service
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Marine Butterfly Valve With Hard Seat, Suitable for Steam Lines up to 425°CNegotiableMOQ: 1 Unit
As a leading manufacturer since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance industrial valves for demanding global applications. Our DN50-DN800 Marine Hard Seal Butterfly Valve, PN10 Rated for 425°C Service, is engineered to deliver exceptional reliability and durability in the most challenging marine and high-temperature environments. This valve represents our commitment to quality and innovation, providing a robust sealing solution where standard soft-seat valves would fail.
The core value of this valve lies in its hard-sealed, metal-to-metal seat design, which ensures zero leakage and long-term performance under extreme thermal cycling, corrosive media, and high-pressure differentials common in shipboard systems, offshore platforms, and industrial process plants.
Key Features & Technical Advantages:
- Superior High-Temperature Performance: Specifically designed for continuous service at temperatures up to 425°C (797°F), the valve utilizes advanced alloy materials and a precision-machined hard seal interface that resists thermal deformation and maintains sealing integrity.
- Exceptional Corrosion & Erosion Resistance: The critical sealing components are manufactured from grade 304/316 stainless steel or specialized alloys, offering excellent resistance to seawater, steam, chemicals, and abrasive slurries.
- Robust & Compact Design: The wafer or lug body design provides a space-saving and lightweight solution without compromising strength, making it ideal for space-constrained marine engine rooms and piping systems.
- Bidirectional Sealing Capability: The symmetrical disc and seat design ensure reliable shut-off against flow from either direction, enhancing system safety and flexibility.
- Low Torque Operation: The optimized disc profile and high-quality bearing system reduce operating torque, allowing for smoother manual operation or enabling the use of smaller, more cost-effective actuators.
- Long Service Life & Low Maintenance: The hardened metal seats and discs exhibit minimal wear over time, drastically reducing the frequency of maintenance and replacement compared to elastomer-seated valves.
Detailed Technical Specifications:
| Parameter | Specification / Range |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600, DN700, DN800 |
| Pressure Rating | PN10 (10 bar / 145 psi) |
| Max Operating Temperature | 425°C (797°F) |
| Seat Type | Hard Seal / Metal Seat (Stainless Steel or Special Alloy) |
| Body Material Options | WCB Carbon Steel, CF8/CF8M Stainless Steel, Other Alloy Steels (Customizable) |
| Disc Material Options | 304/316 SS, 410 SS, Monel, Hastelloy (Available upon request) |
| Stem Material | Stainless Steel (17-4PH or equivalent) |
| End Connection | Wafer, Lug, Double Flange (as per standard) |
| Operation | Lever, Worm Gear, Electric Actuator, Pneumatic Actuator (Optional) |
| Standards | ISO 5752, API 609, DIN, JIS, GB (Manufactured to order) |
Benefits for Your Operations:
- Enhanced System Safety: Reliable shut-off in high-temperature and high-pressure systems minimizes the risk of leaks and operational hazards.
- Reduced Total Cost of Ownership: The extended service life and minimal maintenance requirements lead to significant savings on downtime, spare parts, and labor.
- Design Flexibility: Available in a comprehensive size range from DN50 to DN800, with various material and actuation options, allowing for perfect integration into new projects or retrofit applications.
- Global Compliance: Manufactured under a strict ISO9001 certified quality management system, ensuring consistent product quality and traceability demanded by international marine and industrial projects.
Frequently Asked Questions (FAQ):
Q1: What is the primary advantage of a hard seal butterfly valve over a soft seal one?
A: The primary advantage is its suitability for extreme conditions. While soft-seat valves use elastomers that degrade at high temperatures or with certain chemicals, hard seal (metal seat) valves maintain their sealing integrity at temperatures up to 425°C and are resistant to a wider range of corrosive and abrasive media, offering much longer service life in harsh applications.
Q2: Can this valve be used for both isolation and throttling control?
A: This valve is primarily designed for on/off isolation service. Its hard-seat design provides excellent shut-off but is not typically recommended for precise flow modulation or continuous throttling, as it may lead to accelerated seat wear. For control applications, a specialized control valve would be more suitable.
Q3: What types of actuators are compatible with this valve?
A: The valve is designed to be compatible with a wide range of actuators. Standard manual options include lever handles and worm gear operators. For automated operation, electric (on/off or modulating) and pneumatic (single/double-acting) actuators can be fitted. We can supply the valve as a complete package with an actuator upon request.
Q4: Is this valve suitable for seawater cooling systems on ships?
A: Absolutely. When specified with appropriate corrosion-resistant materials like 316 stainless steel or duplex stainless steel for the wetted parts, this valve is an excellent choice for seawater, ballast, fire-fighting, and cooling water systems on marine vessels and offshore installations.
Q5: What is the lead time for an order of DN300 valves?
A: Lead times vary based on order quantity, material specifications, and actuator requirements. Standard configurations typically have shorter lead times. We recommend contacting our sales team with your specific requirements for an accurate production and delivery schedule.
Q6: Do you provide documentation and certifications with the valves?
A: Yes. Each valve shipment is accompanied by essential documentation, which may include a material test report, certificate of conformance, pressure test report, and operation manual. Specific certifications can be provided as per the project's requirements.
Q7: Can the valve be customized for a pressure rating higher than PN10?
A> While this series is rated for PN10, our engineering team can design and manufacture hard seal butterfly valves for higher pressure classes (e.g., PN16, PN25, Class 150, Class 300) based on your application needs. This would involve design modifications to the body, disc, and seat.
Q8: What after-sales support do you offer?
A: We provide comprehensive technical support, including installation guidance and troubleshooting. Spare parts such as seal rings, stems, and bearings are available. Our global distribution network, serving markets from North America and Europe to Southeast Asia and Africa, ensures reliable support for our international clients.
Backed by nearly a decade of manufacturing expertise and an annual export value ranging between US$1 Million to US$1.5 Million, Shanghai Zhibang has established itself as a trusted partner for valve solutions worldwide. Our products are shipped from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient logistics to our global clientele across six continents.
Choosing our Marine Hard Seal Butterfly Valve means investing in a component built for reliability under pressure and heat. It is designed to reduce your operational risks and maintenance costs while ensuring system integrity. For detailed quotations, technical datasheets, or to discuss your specific application requirements, please contact our team today. Let us provide you with a valve solution that stands up to the challenge.
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