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Help CenterDNV BV Approved Marine Steam PRV for Marine Engineering Cast Steel Flanged DN15-DN100 PN1.6-6.4MPa
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As a specialized manufacturer from Shanghai Zhibang Valve Manufacture Co., Ltd (established in 2016), we are proud to present our DNV BV Approved Marine Steam PRV – a high-performance pressure relief valve engineered specifically for marine engineering applications. This cast steel flanged valve, available in sizes DN15 to DN100 and pressure ratings PN1.6 to 6.4MPa, combines robust construction with certified reliability, ensuring the safety of steam systems aboard vessels. Our factory, with an annual export value of US$1-1.5 million, has been delivering valves to global markets including North America, Europe, and Southeast Asia, backed by our ISO9001 quality management system.
This PRV is designed to protect steam boilers, pipelines, and pressure vessels from overpressure conditions, which is critical for marine environments where safety and operational continuity are paramount. The valve features a direct spring-loaded mechanism, providing accurate set pressure and reliable reseating characteristics. The cast steel body offers excellent strength and corrosion resistance, while the flanged ends ensure easy installation and maintenance.
Key Features & Technical Specifications
- DNV & BV Type Approval – Certified by leading classification societies, meeting stringent marine industry standards.
- Material – Cast steel (WCB or equivalent) body and bonnet, suitable for high-temperature steam service.
- Flanged Connection – Available in ANSI, DIN, or JIS flanges (customizable), ensuring compatibility with marine piping systems.
- Pressure Range – PN1.6 to PN6.4MPa (150-600 LB), covering a wide range of marine steam system requirements.
- Size Range – DN15 to DN100 (½” to 4”), offering flexibility for various flow capacities.
- Set Pressure – Adjustable from 0.1 to 6.4MPa, with a tolerance of ±3% as per standard.
- Operating Temperature – Up to 350°C (662°F) for steam applications.
- Sealing – Metal-to-metal seat or optional soft seat for enhanced tightness.
| Parameter | Value |
|---|---|
| Nominal Diameter (DN) | 15, 20, 25, 32, 40, 50, 65, 80, 100 |
| Pressure Rating (PN) | 1.6, 2.5, 4.0, 6.4 MPa |
| Set Pressure Range | 0.1 – 6.4 MPa |
| Maximum Operating Temperature | 350°C (steam) |
| Body Material | Cast Steel (WCB / WCC or equivalent) |
| Connection Standard | ANSI B16.5, DIN 2501, JIS B2220 (customizable) |
| Certification | DNV, BV, ISO9001 |
Advantages & Customer Benefits
- Enhanced Safety – The valve is engineered to prevent overpressure incidents, protecting crew, equipment, and cargo. Its DNV/BV approval ensures compliance with the highest marine safety standards.
- Long Service Life – The cast steel body and stainless steel internals resist corrosion and thermal fatigue, reducing maintenance frequency and downtime.
- Easy Installation – Flanged ends simplify integration into existing piping systems, and the valve can be oriented in any position.
- Accurate Pressure Control – The spring-loaded design provides stable blowdown and reseating, minimizing pressure fluctuations.
- Global Compatibility – Available with multiple flange standards (ANSI, DIN, JIS) to suit shipyards and operators worldwide.
- Customizable Options – We offer optional lifting levers, test gags, and different trim materials upon request.
Our Marine Steam PRV is widely used in main steam systems, auxiliary steam lines, and boiler safety applications on tankers, bulk carriers, container ships, and offshore platforms. The valve’s design ensures tight shut-off after relieving, minimizing steam loss and energy waste.
Trust & Reliability
Shanghai Zhibang Valve Manufacture Co., Ltd has been a trusted manufacturer since 2016, with annual export revenue of US$1 million to US$1.5 million. Our products are exported to over 15 markets including North America, South America, Eastern Europe, Southeast Asia, and Africa. We are ISO9001 certified, and our quality control processes ensure every valve undergoes rigorous testing: hydrostatic test, set pressure test, and seat leakage test. We ship from major Chinese ports: Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery.
By choosing our DNV BV Approved Marine Steam PRV, you are investing in a product that meets the demanding requirements of the marine industry. Our team provides technical support, documentation, and after-sales service. Contact us today for a quotation or to discuss your specific project requirements.
Frequently Asked Questions (FAQ)
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Q: What is the difference between this PRV and a standard safety valve?
A: This PRV is specifically designed for marine steam systems and has DNV/BV type approval, ensuring it meets classification society rules. It is made of cast steel for high-temperature service and has flanged connections for marine piping. -
Q: Can I get the valve with a lifting lever?
A: Yes, a lifting lever (manual or assisted) is available as an optional feature for testing the valve manually. -
Q: What flange standards are supported?
A: We support ANSI B16.5, DIN 2501, and JIS B2220. Other standards can be customized upon request. -
Q: What is the typical lead time?
A: For standard sizes and pressures, lead time is 15-25 working days after order confirmation. Custom orders may take longer. -
Q: Do you provide a certificate of conformity or material test report?
A: Yes, we provide standard certificates including material certificate, pressure test report, and DNV/BV certificate as per the classification society requirements. -
Q: Can this valve be used for other media besides steam?
A: The valve is designed for steam, but it can also be used for air, water, and other non-corrosive gases/liquids within the temperature and pressure limits. Please consult our technical team for specific media compatibility. -
Q: What is the warranty period?
A: We offer a standard 12-month warranty from the date of shipment against manufacturing defects. -
Q: How do I order the correct set pressure?
A: When placing an order, please specify the required set pressure (in MPa or bar) and the working conditions. We will adjust the valve accordingly before shipment.
Note: All specifications are subject to change for product improvement. Please contact our sales team for the latest technical data.
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