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Help CenterMarine Pneumatic Butterfly Valve Compliant With DNV LR Standards
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As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions for the global maritime industry. Our Marine Pneumatic Butterfly Valve is engineered specifically to meet the rigorous demands of shipboard applications, offering reliable, automated on/off and modulating control for critical systems such as ballast, seawater cooling, firefighting, and bilge services. Designed in full compliance with DNV and Lloyd's Register (LR) standards, this valve represents our commitment to quality, safety, and international compliance, backed by our ISO9001-certified manufacturing processes and an annual export value exceeding US$1 million.
This valve is built to withstand the harsh marine environment, featuring a robust construction and a pneumatic actuator that ensures quick, dependable operation even in demanding conditions. The core value we deliver is uncompromised reliability combined with simplified maintenance, reducing vessel downtime and operational costs for ship owners and operators worldwide. Our products have been successfully supplied to markets across North America, South America, Europe, Asia, Africa, and Oceania, shipped from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing.
Key Features & Technical Advantages:
- DNV & LR Compliance: The valve is designed, manufactured, and tested according to the strict requirements of Det Norske Veritas (DNV) and Lloyd's Register (LR) standards for marine applications, ensuring acceptance in international shipbuilding and repair projects.
- Corrosion-Resistant Construction: Available in a range of materials including cast steel (with marine-grade epoxy coating), stainless steel (316/316L), and duplex steel to combat corrosion from seawater, salt spray, and atmospheric exposure.
- Pneumatic Actuation for Remote Control: Equipped with a double-acting or spring-return pneumatic actuator, allowing for remote operation from the control room. This enhances safety by minimizing manual intervention in hazardous or hard-to-reach areas.
- Bubble-Tight Sealing: Utilizes high-performance seat materials such as EPDM, NBR, PTFE, or Viton, selected based on service media and temperature, to achieve bubble-tight shut-off and long service life.
- Low Torque, High Flow Design: The disc and shaft design minimizes pressure drop and actuation torque, leading to energy-efficient operation and allowing the use of smaller, more cost-effective actuators.
- Easy Installation & Maintenance: Available in wafer, lug, and double flange connection types for straightforward installation between pipe flanges. The modular design facilitates easy seat replacement and actuator servicing without removing the valve body from the pipeline.
Technical Specifications Table:
| Parameter | Specification / Options |
| Size Range | DN50 to DN600 (2" to 24") |
| Pressure Rating | PN10, PN16, PN25, Class 150, Class 300 (customizable) |
| Body Materials | Cast Steel WCB, Stainless Steel CF8/CF8M, Duplex Steel |
| Seat Materials | EPDM, NBR, PTFE, Viton (FKM) |
| Actuator Type | Pneumatic Double Acting / Spring Return (Fail-Safe) |
| Control Signal | 4-20mA, 0-10V, or On/Off Switch (optional) |
| Operating Temperature | -20°C to +120°C (dependent on seat material) |
| Connection Standards | ISO, ANSI, JIS, DIN Flange Standards |
Benefits for Your Marine Operations:
- Enhanced System Safety & Reliability: Compliance with DNV/LR standards provides assurance of quality and fitness for purpose, crucial for classification society approval and insurance requirements.
- Reduced Operational Costs: The durable design and corrosion-resistant materials extend valve life, lowering replacement frequency and maintenance expenses.
- Improved Operational Efficiency: Pneumatic actuation enables fast response and integration into automated control systems, optimizing process control and reducing crew workload.
- Global Supply Chain Support: With shipment capabilities from multiple ports in China and a presence in key maritime markets worldwide, we ensure timely delivery and logistical support for your projects.
Frequently Asked Questions (FAQ):
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Q: What documentation is provided with the valve to prove DNV/LR compliance?
A: We provide a Material and Test Certificate (MTC) that traces the materials used. For full certification, a DNV or LR Type Approval Certificate can be supplied upon request, following witnessed testing at our facility or an approved third-party lab. -
Q: Can this valve be used for both seawater and freshwater applications on board?
A: Yes. The material selection (e.g., stainless steel body with EPDM seat) makes it suitable for seawater, ballast, cooling, and freshwater services. The specific material combination should be chosen based on the exact media and temperature. -
Q: What is the lead time for standard sizes and configurations?
A: For standard DNV/LR compliant valves in common sizes (DN80-DN300), the typical lead time is 4-6 weeks. Non-standard or large sizes may require additional time. -
Q: Do you offer valves with different fail-safe modes for the actuator?
A: Yes. We offer both double-acting (air-to-open, air-to-close) and spring-return actuators. The spring-return type provides a fail-safe position (either fully open or fully closed) in case of air supply loss, which is critical for safety-related applications. -
Q: Is the pneumatic actuator included, and what is its air supply requirement?
A: Yes, the valve is supplied as a complete unit with the actuator mounted and tested. Standard actuators operate on a clean, dry air supply of 4-6 bar (60-90 psi). Specific requirements can be customized. -
Q: How do I select the right seat material for my application?
A: Seat material selection depends on the fluid media, temperature, and required sealing performance. EPDM is common for general water services, NBR for oils, PTFE for high temperatures or aggressive chemicals, and Viton for high-temperature hydrocarbons. Our technical team can assist with selection. -
Q: Can you provide valves with specific painting requirements, such as a ship's color scheme?
A: Absolutely. While our standard finish is a marine-grade epoxy coating, custom painting to match RAL or other color standards is available upon request. -
Q: What is your after-sales service and warranty policy?
A: We offer an 18-month warranty from the date of shipment against manufacturing defects. We also provide technical support, spare parts (like seals and seats), and repair services to ensure the long-term performance of your valves.
Choosing Shanghai Zhibang's Marine Pneumatic Butterfly Valve means partnering with an experienced manufacturer whose products are trusted in shipyards and on vessels across the globe. Our ISO9001 quality management system underpins every stage of production, from material sourcing to final testing. With an annual export value consistently between US$1 million and US$1.5 million, we have demonstrated our capability to meet the needs of international clients in over a dozen major markets, including North America, Europe, Southeast Asia, and the Middle East.
This valve is more than just a component; it's a commitment to the safety, efficiency, and reliability of your marine operations. Its compliance with stringent DNV and LR standards simplifies your approval process and provides peace of mind. For detailed quotations, technical datasheets, or to discuss your specific project requirements—whether for newbuilds, retrofits, or spare parts—please contact our sales team. Let us provide you with a robust, compliant, and cost-effective valve solution for your next maritime project.
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