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As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to offer our specialized 4-20mA Electric Regulating Butterfly Valve. Engineered specifically for the demanding control requirements of shipboard ballast water treatment systems, this valve provides reliable and precise flow management essential for environmental compliance and operational safety. Since our establishment in 2016, we have focused on delivering robust industrial valves that meet international standards, exporting to key markets across the globe. This product exemplifies our commitment to combining precise electromechanical actuation with durable valve construction for critical marine applications.
The valve's core function is to accurately modulate the flow of ballast water based on a standard 4-20mA control signal from the treatment system's PLC or control panel. This allows for seamless integration into automated processes, ensuring precise dosing, flow control, and system sequencing. Key features and advantages include:
- High Precision Regulation: The electric actuator provides precise angular positioning of the butterfly disc, enabling fine-tuned control over flow rates, which is crucial for effective ballast water treatment.
- Rugged Marine-Grade Construction: Designed to withstand the corrosive marine environment, with material options like stainless steel and coated ductile iron for enhanced longevity.
- Fail-Safe Options: Available with spring-return or battery backup mechanisms to move the valve to a predefined safe position (open/closed) in case of power loss, protecting the system.
- Integrated Feedback & Diagnostics: Provides real-time valve position feedback (4-20mA or potentiometer) and may include diagnostic alerts for maintenance planning.
- Easy Integration & Commissioning: The standardized 4-20mA signal interface simplifies connection to existing shipboard control systems, reducing installation time and complexity.
- Low Maintenance Design: Sealed actuator housing and robust stem sealing minimize ingress of saltwater and contaminants, reducing maintenance intervals and lifecycle costs.
The technical specifications for a typical valve configuration are outlined below. Please note that specific parameters can be customized upon request to match your system's exact requirements.
| Parameter | Typical Specification |
| Control Signal | 4-20mA analog, two-wire or three-wire |
| Power Supply | AC 110/220V, 50/60Hz or DC 24V (customizable) |
| Valve Sizes (DN) | 50, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600 |
| Pressure Rating | PN10, PN16, ANSI Class 150 |
| Body Material Options | Ductile Iron (GGG40/50), Carbon Steel (WCB), Stainless Steel (CF8/CF8M) |
| Seat Material Options | EPDM, NBR, PTFE, Viton (FKM) |
| Actuator Protection Class | IP67 (standard), IP68 (optional) |
| Ambient Temperature Range | -20°C to +70°C (Actuator) |
For ship owners, operators, and system integrators, the benefits are clear. This valve ensures reliable compliance with international ballast water management regulations (such as IMO D-2 standard) by providing accurate control over treatment processes. It enhances system automation, reducing manual intervention and potential human error. The durable construction leads to lower total cost of ownership through reduced downtime and maintenance. Furthermore, its precise control contributes to optimized energy and chemical usage within the treatment system, improving overall operational efficiency.
Shanghai Zhibang's commitment to quality is backed by our ISO9001 certification and proven track record. With an annual export value ranging from US$1 Million to US$1.5 Million, our products have gained trust in diverse markets including North America, South America, Europe, Asia, Africa, and Oceania. We support our global clients with efficient logistics from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing. Choosing our electric regulating butterfly valve means selecting a component built for reliability, precision, and long service life in the challenging marine environment. We invite you to contact us to discuss your specific ballast water treatment system requirements and how our valve can be tailored to provide an optimal control solution.
Frequently Asked Questions (FAQ)
Q1: What is the primary advantage of using a 4-20mA signal for this valve?
A: The 4-20mA analog signal is an industry standard known for its noise immunity and ability to transmit information over long distances without significant signal degradation. It allows the central control system to precisely command the valve position and simultaneously receive valve position feedback on the same pair of wires, simplifying wiring and improving reliability in the electrically noisy shipboard environment.
Q2: Can this valve be used with different types of ballast water treatment technologies (UV, electrolysis, filtration)?
A: Yes, absolutely. The valve's function is flow regulation, which is a common requirement across various treatment technologies. Whether controlling flow through a UV chamber, managing water intake for filtration, or regulating a chemical dosing loop, this valve can be integrated. The specific materials (e.g., stainless steel for electrolysis systems) can be selected to ensure compatibility.
Q3: How do you ensure the valve can withstand the corrosive marine atmosphere?
A: We employ several strategies: the electric actuator housing is rated at least IP67 for dust and water ingress protection; external components are often coated with marine-grade epoxy paints; and we offer body and trim materials like 316 stainless steel which provide excellent corrosion resistance. The shaft sealing is also designed to prevent seawater ingress into the bearing area.
Q4: What happens if the control signal is lost or the power fails?
A: This is a critical safety consideration. We offer actuators with optional fail-safe features. A common configuration is a spring-return mechanism that automatically drives the valve to a fully open or fully closed position upon signal/power loss. Alternatively, a supercapacitor or battery backup module can be integrated to power the actuator to a safe position.
Q5: Is local manual operation possible in case of an emergency or for maintenance?
A: Yes. The actuator is typically equipped with a manual override feature. This allows an operator to disengage the motor drive and use a handwheel or lever to manually position the valve. This is essential for troubleshooting, maintenance, or operation during control system outages.
Q6: What is the typical delivery time for a custom-sized or specially configured valve?
A: For standard sizes and common material combinations, we often maintain stock for quick shipment. For fully customized orders (e.g., specific flange standards, exotic alloys), the lead time depends on the complexity but generally ranges from 4 to 8 weeks. We provide accurate timelines upon receipt of detailed specifications.
Q7: Do you provide support for system integration and commissioning?
A: We provide comprehensive technical documentation, including wiring diagrams, communication protocols (if applicable), and installation manuals. For complex projects, our engineering team is available for remote consultation to assist with integration parameters and initial setup. On-site commissioning support can be arranged upon request.
Q8: Are spare parts readily available for long-term maintenance?
A: Yes. As a manufacturer, we maintain an inventory of critical spare parts such as seal kits, position feedback modules, and gaskets. We recommend keeping a basic spare parts kit onboard to minimize downtime. The modular design of the actuator also facilitates easy replacement of sub-components if needed.
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