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Help CenterFactory Direct 4-20mA Signal Electric Regulating Butterfly Valve for Marine Applications, Technical Support Included
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As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable flow control solutions for demanding industrial environments. Our Factory Direct 4-20mA Signal Electric Regulating Butterfly Valve is engineered specifically for the rigorous requirements of marine applications, where precise control, durability, and seamless integration with shipboard automation systems are paramount. We combine direct manufacturing efficiency with comprehensive technical support, ensuring you receive a high-performance valve backed by expert guidance for installation, calibration, and maintenance. This product represents our commitment to supporting global maritime operations, from commercial shipping to offshore platforms, with components designed for longevity and precise operation in challenging saltwater and atmospheric conditions.
This valve is a cornerstone for modern marine process control, enabling accurate flow regulation of seawater, ballast, fuel, lubricants, and other fluids based on a standard 4-20mA control signal from your PLC, DCS, or onboard control system.
- Precise Proportional Control: The integrated electric actuator provides smooth, modulating control in response to the 4-20mA input signal, allowing for fine-tuned flow rates rather than simple on/off operation. This is essential for processes like tank level control, cooling system regulation, and fuel blending.
- Marine-Grade Construction: Designed to withstand the corrosive marine environment. Standard body materials include coated cast iron or ductile iron, with stainless steel (304/316) available for highly corrosive services. The shaft is typically stainless steel to prevent seizure.
- Robust Electric Actuator: Features a waterproof and dustproof housing (typically IP67 or higher) to protect against washdown, spray, and humid conditions. The actuator is designed for reliable performance with high torque output to handle potential line debris.
- Fail-Safe Options: Configurations are available where the valve can be set to fail in the open, closed, or last position in case of power or signal loss, enhancing system safety.
- Easy Integration & Setup: The 4-20mA signal is the industry standard, ensuring compatibility with most marine control systems. Setup typically involves calibrating the 4mA and 20mA points to correspond with the valve's 0% and 100% open positions.
- Low Maintenance Design: The butterfly valve design offers a simple mechanism with fewer wearing parts compared to other valve types. The seat and disc are easily replaceable, minimizing downtime during maintenance.
Key technical specifications for standard models are outlined below. Custom configurations for pressure rating, flange standards, and materials are available upon request.
| Parameter | Specification / Option |
|---|---|
| Valve Size Range | DN50 to DN600 (2" to 24") |
| Pressure Rating (PN) | PN10, PN16, PN25 |
| Signal & Power | Control: 4-20mA DC (2-wire); Power: 110VAC/220VAC, 24VDC/110VDC |
| Actuator Protection | IP67 (standard), IP68 optional |
| Flow Characteristic | Approximately equal percentage (suitable for regulation) |
| Full Stroke Time | ~15-60 seconds (depends on size and model) |
| Ambient Temperature | -20°C to +60°C for actuator |
The primary advantage of sourcing this valve directly from our factory is the elimination of intermediary markups, providing you with a cost-effective solution without compromising on quality or features. Furthermore, our dedicated technical support team is accessible to assist with selection, wiring diagrams, troubleshooting, and spare parts identification, ensuring your project's success from specification to long-term operation.
With an annual export value between US$1 Million and US$1.5 Million and a presence in major markets across North America, South America, Europe, Asia, Africa, and Oceania, Shanghai Zhibang has demonstrated its capability to meet international standards and customer expectations. Our operations are backed by an ISO9001-certified quality management system, which governs our production processes from raw material inspection to final testing. Each valve undergoes functional tests, including signal response verification and seat leakage tests, before shipment. We support flexible logistics with major ports of shipment including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to your project site or vessel. For your next marine application requiring reliable and precise flow control, choose a partner that provides both the product and the expertise. Contact us today to discuss your specifications and receive a competitive factory-direct quotation.
Frequently Asked Questions (FAQ)
Q1: What does "4-20mA signal" mean for this valve?
A1: The 4-20mA signal is an analog electrical current signal used for control. A 4mA input typically commands the valve to be fully closed (0%), while a 20mA input commands it to be fully open (100%). Any current value between 4mA and 20mA will position the valve proportionally, enabling precise flow regulation from your control room.
Q2: Is this valve suitable for seawater service?
A2: Yes, it is designed for marine applications. For direct seawater contact, we recommend specifying a 316 stainless steel body and disc, along with a seawater-resistant seat material like EPDM or Viton. The actuator's high IP rating protects it from salt spray and washdown.
Q3: Do you provide the necessary mounting brackets or linkages?
A3: The electric actuator is mounted directly onto the valve body as a complete, pre-assembled unit. No external linkages or brackets are required for standard configurations, simplifying installation.
Q4: Can I get a valve with a different signal, like 0-10V or on/off control?
A4: Yes. While the featured model uses 4-20mA, we offer actuators with various control signal inputs (0-10V, pulse, etc.) and simple on/off (open/close) control. Please specify your requirements when inquiring.
Q5: What kind of technical support is included?
A5: Our support includes assistance with valve selection based on your fluid, pressure, and duty cycle; provision of dimensional drawings and wiring diagrams; guidance on installation and calibration; and troubleshooting support. We aim to be a technical resource for our clients.
Q6: How is the fail-safe feature implemented?
A6: The fail-safe function requires an actuator with a spring-return mechanism. Upon loss of power, the spring drives the valve to a predetermined safe position (open, closed, or held). This is an optional feature that must be specified at the time of order.
Q7: What are the lead times for these valves?
A7: Lead times vary based on size, material, and configuration. Standard models may be available from stock or have shorter production cycles. We provide estimated lead times with every quotation to help you plan your project schedule.
Q8: Do you offer customization for specific flange standards?
A8: Absolutely. We can manufacture valves to match common flange standards such as ANSI, JIS, DIN, or GB. Please provide the specific standard, pressure class, and facing details when requesting a quote.
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