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As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable fluid control solutions for demanding marine and industrial applications. Our Electro-Hydraulic Actuated Marine Butterfly Valve is engineered specifically for integration into sophisticated remote control systems, where dependable operation and precise flow regulation are non-negotiable. This valve combines the robust sealing performance of a high-performance butterfly valve with the powerful and responsive control of an electro-hydraulic actuator, making it an ideal choice for ballast systems, seawater cooling lines, fuel transfer, and other critical shipboard piping networks. We understand the challenges of the maritime environment, and this product is built to deliver long-term performance with minimal maintenance, helping to ensure vessel safety and operational efficiency. With an annual export value reflecting our global reach, we are committed to supporting your projects with quality products and reliable service.
The core of this valve system is its seamless integration of mechanical and control components. The electro-hydraulic actuator provides significant advantages over purely electric or pneumatic alternatives, particularly in marine settings.
- High Torque Output: Hydraulic power delivers exceptionally high torque in a compact package, allowing for reliable operation of larger valve sizes even under high differential pressures or with viscous media.
- Intrinsic Safety: The hydraulic system is inherently safe for use in potentially hazardous areas commonly found on vessels, as it eliminates spark risks associated with large electric motors.
- Precise Positioning & Modulation: Unlike simple on/off actuators, this system allows for precise intermediate positioning (modulating control), enabling accurate flow rate control for processes like tank level management.
- Fail-Safe Options: The actuator can be configured with spring-return or hydraulic accumulator systems to drive the valve to a predefined safe position (open or closed) upon loss of power or signal, a critical feature for safety systems.
- Robust Construction: The valve body, disc, stem, and seat are constructed from marine-grade materials selected for corrosion resistance against seawater, bilge water, and various fuels.
The remote control capability transforms this from a simple valve into an intelligent component of your ship's automation network. It can receive standard control signals (e.g., 4-20mA, 0-10V) or digital commands via Profibus, Modbus, or other fieldbus protocols. This enables centralized monitoring and control from the engine control room (ECR) or bridge, reducing the need for manual intervention in remote or hazardous valve locations.
Key Technical Specifications & Configurations:
| Parameter | Specification / Option |
| Valve Design Standard | ISO 10631, API 609, MSS SP-67/68 |
| Actuator Type | Electro-Hydraulic, Rotary Vane or Piston Style |
| Input Power | 24VDC, 110VAC, 220VAC, 380VAC, 440VAC, 60Hz/50Hz |
| Control Signal | 4-20mA, 0-10VDC, Digital (Profibus DP, Modbus RTU) |
| Feedback Signal | 4-20mA (position), Limit Switches (open/close) |
| Operating Temperature | Standard: -20°C to +120°C; High-temp options available |
| Seat Leakage Class | ISO 5208 Rate A (Zero Leakage) or Rate B (Bubble-tight) |
| Protection Rating | IP67 / IP68 for actuator; NEMA 4X optional |
| Local Control | Integrated manual override (handwheel or pump) |
For shipbuilders, system integrators, and vessel operators, the benefits are substantial. Enhanced Safety is achieved through remote operation, reducing crew exposure to dangerous areas. Operational Efficiency improves with faster valve cycling and centralized control, saving time during critical maneuvers. Predictive Maintenance becomes possible by monitoring actuator performance data, helping to prevent unexpected failures. Furthermore, the system's Space-Saving Design is crucial in the cramped machinery spaces of modern vessels.
Frequently Asked Questions (FAQ):
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Q: Is this valve suitable for seawater service?
A: Absolutely. We offer material combinations specifically for seawater, such as Duplex Stainless Steel body/disc with EPDM or HNBR seats, providing excellent resistance to corrosion and marine growth. -
Q: What is the typical delivery time for a custom-configured valve?
A: Standard configurations are typically available within 4-6 weeks. For custom specifications involving special materials, larger sizes, or specific certifications, lead time may extend to 8-10 weeks. We provide accurate timelines upon receipt of your detailed requirements. -
Q: Can the actuator be repaired onboard, or must it be sent back to the factory?
A: The actuator is designed with serviceability in mind. Common maintenance items like seals and filters can be replaced onboard with standard tools. Major component repairs are recommended at authorized service centers, for which we provide global support information. -
Q: How do you ensure compatibility with our existing ship control system (SCS)?
A: We request details of your control system's communication protocol and signal requirements. Our engineering team configures the actuator's local control panel and software to ensure seamless plug-and-play integration, providing necessary interface documentation. -
Q: What fail-safe modes are available?
A: The most common are spring-return (to open or closed) and hydraulic lock with accumulator. In spring-return, internal springs move the valve upon power loss. The hydraulic lock holds the last position, with an optional accumulator providing energy for a single cycle to a safe position. -
Q: Do you provide documentation packages for class approval?
A: Yes. We can supply comprehensive documentation including material certificates (3.1/3.2), pressure test reports, functional test reports, drawings, and operation manuals. These are commonly used to support approvals from major classification societies. -
Q: What is the expected service life of the valve and actuator?
A> Under normal marine service conditions and with recommended maintenance, the valve body and disc can last the lifetime of the vessel. The actuator and sealing components have a design life exceeding 50,000 cycles, with service intervals recommended every 5 years or 10,000 cycles. -
Q: Can you supply valves for cryogenic services (LNG, etc.)?
A> While this specific model is optimized for standard marine temperatures, we have related product lines for cryogenic applications. Please inquire with our technical sales team for solutions tailored to LNG carrier or other low-temperature duties.
Backed by our ISO9001 certified manufacturing processes, every Electro-Hydraulic Actuated Marine Butterfly Valve undergoes rigorous pressure testing, functional checks, and, upon request, witnessed testing to ensure it meets your exact specifications. Our products have gained trust in global markets across North America, Europe, Southeast Asia, and beyond, supported by efficient logistics from major ports like Shanghai and Guangzhou. We are not just a supplier; we are a partner in ensuring the reliability of your vessel's critical systems. Contact us today to discuss your project requirements, request detailed technical data sheets, or arrange for a consultation with our engineering team. Let us provide you with a robust, reliable, and remotely controllable valve solution that enhances the safety and efficiency of your maritime operations.
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