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Help CenterDNV BV Approved Marine Audible Self Closing Valve DN15 DN50 1.6 4.0MPa Cast Steel Flanged
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Shanghai Zhibang Valve Manufacture Co., Ltd., a dedicated manufacturer since 2016, presents our DNV & BV Approved Marine Audible Self Closing Valve in cast steel, flanged design. Engineered for the demanding marine environment, this valve combines safety, reliability, and compliance with the highest classification society standards. With an annual export value exceeding US$1 million and a global presence across North America, Europe, Asia, and Oceania, we are your trusted partner for critical fluid control systems.
Our Marine Audible Self Closing Valve is designed to automatically shut off fluid flow in the event of a fire or system failure, while emitting a distinct audible alarm to alert personnel. Available in sizes from DN15 to DN50 and pressure ratings from 1.6 MPa to 4.0 MPa, the valve is constructed from high-grade cast steel, ensuring durability and corrosion resistance in harsh marine atmospheres. The flanged connection facilitates easy installation and maintenance, making it ideal for fuel oil, lube oil, and water systems on ships and offshore platforms.
Key Features & Technical Specifications
- Audible Alarm System: Integrated whistle or bell mechanism provides clear acoustic warning upon valve closure, meeting SOLAS and marine safety regulations.
- Self-Closing Mechanism: Spring-loaded or weight-assisted closure ensures automatic shut-off when temperature rises (fusible link) or upon manual release, preventing fire spread.
- Material: Cast steel body and bonnet, with stainless steel trim (stem, disc, seat) for extended service life.
- Pressure & Temperature Range: Suitable for working pressures up to 4.0 MPa and temperatures from -20°C to +150°C (customizable for higher).
- Flange Standard: Available in DIN, ANSI, JIS, or GB flanges, with raised face or RTJ facing as required.
- Certifications: Approved by DNV GL and BV (Bureau Veritas) for marine applications; manufactured under ISO9001:2015 quality management system.
- Installation Orientation: Can be installed in horizontal or vertical pipelines with flow direction marked clearly.
- Low Maintenance: Simple design with minimal moving parts reduces downtime and service costs.
| Parameter | Value |
|---|---|
| Nominal Diameter | DN15, DN20, DN25, DN32, DN40, DN50 |
| Pressure Rating | 1.6 MPa, 2.5 MPa, 4.0 MPa (optional higher) |
| Body Material | Cast Steel (WCB, WCC, LCB, etc.) |
| Trim Material | Stainless Steel 304/316 |
| End Connection | Flanged (RF, FF, RTJ) |
| Actuation | Manual with fusible link (thermal release) |
| Temperature Range | -20°C to +150°C (higher optional) |
| Standards | ISO 9001, DNV GL, BV, SOLAS |
Benefits for Your Marine Operations
- Enhanced Safety: Automatic closure prevents fuel or oil leaks during fires, audible alarm gives warning to crew.
- Compliance Assurance: Fully meets DNV, BV, and other classification society requirements, simplifying vessel certification.
- Durability: Cast steel body withstands high pressure and corrosive marine environment, reducing replacement frequency.
- Easy Installation: Flanged design allows quick mounting without special tools; universal fit for most piping systems.
- Cost-Effective: Low maintenance and long service life lower total cost of ownership.
- Global Support: As an ISO9001 certified manufacturer with export experience, we provide reliable after-sales and spare parts availability.
Shanghai Zhibang Valve has been delivering high-quality valves to international markets since 2016. With an annual export value of US$1-1.5 million and clients across North America, Europe, Asia, Africa, and Oceania, our products have proven their reliability in diverse marine applications. Our ISO9001 management system ensures consistent quality, while our experienced team offers customized solutions for special requirements.
Choose our DNV BV Approved Marine Audible Self Closing Valve for uncompromising safety and performance. We invite you to contact us for quotations, technical drawings, or further customization. Your satisfaction is our priority, and we are ready to support your projects with prompt delivery from Shanghai, Guangzhou, or Hong Kong ports.
Frequently Asked Questions
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Q: What are the available sizes and pressure ratings?
A: Our valve is available in DN15 through DN50, with pressure ratings of 1.6 MPa, 2.5 MPa, and 4.0 MPa. Other sizes and pressures can be custom-made upon request. -
Q: Is the valve suitable for both fuel oil and water applications?
A: Yes, the cast steel construction and stainless steel trim make it suitable for fuel oil, lube oil, fresh water, and sea water systems. However, for specific chemical compatibility, please consult our sales team. -
Q: How does the audible alarm work?
A: When the valve closes automatically (e.g., due to fusible link melting or manual release), a built-in whistle or bell is activated by the flow of fluid or a spring-loaded mechanism, producing a loud sound to alert personnel. -
Q: Do you provide certificates from DNV and BV?
A: Yes, we supply valves with DNV and BV type approval certificates as standard. Additional third-party inspection can be arranged. -
Q: What is the typical lead time?
A: For standard sizes and materials, lead time is 25-35 days after order confirmation. Custom orders may take longer. We ship from Shanghai, Guangzhou, Hong Kong, or Beijing ports. -
Q: Can the valve be installed in any orientation?
A: The valve is designed for horizontal or vertical installation, but the flow direction must be as indicated on the body. For vertical pipes, ensure the closing mechanism operates correctly. -
Q: Is the valve maintenance-free?
A: While low-maintenance, we recommend periodic inspection of the spring, fusible link, and alarm mechanism every 6 months or as per vessel maintenance schedule. -
Q: What flange standards do you support?
A: We offer DIN, ANSI, JIS, and GB flanges. Please specify your requirement when ordering.
Contact Shanghai Zhibang Valve today for a reliable solution that protects your crew and assets. With our global shipping network and proven track record, we are your ideal partner for marine valves.
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