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Home > Industrial Equipment & Components > Valve > Butterfly Valve > DNV Approved Marine Electric Regulating Butterfly Valve With 4-20mA Signal Input for Flow Control

DNV Approved Marine Electric Regulating Butterfly Valve With 4-20mA Signal Input for Flow Control

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Product Spotlights

DNV-approved marine butterfly valve with integrated electric regulating actuator and 4-20mA control input. Enables precise, remote proportional flow control for shipboard systems. Features marine-grade materials, fail-safe options, and IP67 protection. Simplifies regulatory compliance and enhances ship automation, safety, and operational efficiency.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Shipboard Flow Control Systems

Material:

Cast Steel / Stainless Steel / Optional

Size Range:

DN50 to DN500 (2“ to 20“)

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Application Other, Shipboard Flow Control Systems

Material Cast Steel / Stainless Steel / Optional

Size Range DN50 to DN500 (2“ to 20“)

Actuation Type Electric Regulating Actuator

Control Signal 4-20mA Input / Position Feedback

Approval DNV Approved for Marine Use

Connection Type Flanged / Wafer Style

Seat Type PTFE / EPDM / Metal Seat Optional

Pressure Rating PN10 to PN16 / Class 150

Temperature Range -20°C to +120°C

As a professional manufacturer specializing in marine-grade fluid control solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our DNV Approved Marine Electric Regulating Butterfly Valve with 4-20mA Signal Input. Engineered for precise and reliable flow regulation in demanding maritime environments, this valve represents our commitment to combining robust construction with advanced automation technology. Designed specifically to meet the stringent requirements of shipboard applications, it offers shipbuilders, marine engineers, and system integrators a dependable component for controlling liquids and gases with high accuracy and operational safety.

The core value of this product lies in its dual certification of quality and functionality. It carries the DNV approval, a critical credential for marine equipment, assuring compliance with international maritime standards. Simultaneously, its integrated electric regulating actuator with 4-20mA signal input enables seamless integration into modern ship automation and control systems, allowing for remote, proportional, and precise flow adjustment. This eliminates the need for manual intervention in often inaccessible or hazardous locations onboard, enhancing both operational efficiency and personnel safety.

Key Features and Technical Specifications:

DNV Marine Approval: The valve is designed, manufactured, and tested according to DNV (Det Norske Veritas) standards, ensuring it meets the specific safety, performance, and durability requirements for use on ships and offshore installations.
Electric Regulating Actuator: Equipped with a high-performance electric actuator capable of precise angular positioning of the valve disc. This enables proportional flow control rather than simple on/off function.
4-20mA Control & Feedback: The standard 4-20mA analog input signal allows for easy connection to PLCs, DCS, or other control systems. It typically also provides a 4-20mA output signal for valve position feedback, enabling closed-loop control and system monitoring.
Robust Marine Construction: Available in materials suited for corrosive marine environments, such as cast steel with protective coatings or stainless steel (316/316L). The disc, stem, and seat are designed for long service life against seawater, bilge water, fuel, and other shipboard fluids.
Flexible Configuration: Options include different seat materials (PTFE for general service, EPDM for wider temperature range, metal seat for high-temperature/pressure), flange standards (ISO, ANSI, DIN), and actuator enclosure ratings (IP67 for waterproof protection).
Fail-Safe Options: The actuator can be configured with spring return or battery backup for fail-safe operation (open or close upon power loss), a crucial feature for safety-critical marine systems.

Technical Parameters Table:

Parameter	Specification / Range
Valve Size (Nominal Diameter)	DN50, DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400, DN500
Pressure Rating	PN10, PN16 / ANSI Class 150
Body Material	WCB Cast Steel, CF8M Stainless Steel (316), Optional Duplex Steel
Disc Material	Stainless Steel (304/316), Nickel-Plated Steel
Seat Material	PTFE (Standard), EPDM, Metal Seat (Special Order)
Actuator Power Supply	AC 110V/220V, DC 24V (Customizable)
Control Signal	4-20mA Input (Control), 4-20mA / 0-10V Output (Position Feedback)
Actuator Protection	IP67 (Waterproof & Dustproof)
Operating Temperature	Valve: -20°C to +120°C (depends on seat); Actuator: -20°C to +60°C
Flow Characteristic	Approximately Equal Percentage (for regulating models)

Advantages and Customer Benefits:

Enhanced System Automation: Integrates directly into ship automation networks, enabling centralized control and monitoring of flow rates for cooling systems, fuel transfer, ballast control, cargo handling, and more.
Improved Process Accuracy: Proportional control allows for fine-tuning flow rates, optimizing system performance (e.g., engine cooling efficiency), reducing waste, and ensuring precise operational parameters.
Reduced Maintenance & Operational Cost: The reliable design and marine-grade materials minimize corrosion and wear, leading to longer service intervals. Remote operation reduces manual labor and associated risks.
Regulatory Compliance & Safety: The DNV approval simplifies the certification process for new ship builds or retrofits, ensuring the vessel meets international safety standards. Fail-safe features add an extra layer of operational safety.
Global Supply & Support: With our manufacturing base in Shanghai and exports through major ports like Shanghai, Guangzhou, Hongkong, and Beijing, we can supply this product efficiently to global markets including North America, Europe, Asia, and Africa.

Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, operates under a ISO9001 certified quality management system, ensuring every valve undergoes rigorous production and testing controls. Our annual export value ranging between US$1 Million to US$1.5 Million demonstrates our proven capability and reliability in serving a diverse international clientele across continents. This specific valve is a product of our focused expertise in marine applications, combining our manufacturing prowess with a deep understanding of maritime industry needs. We encourage shipyards, marine equipment suppliers, and engineering firms to consider this DNV-approved electric regulating butterfly valve as a trusted and high-performance solution for their flow control requirements. Its design ensures compliance, its functionality enhances automation, and its durability promises long-term value. For detailed specifications, custom configurations, or to discuss your specific project needs, please contact us for a professional consultation.

Frequently Asked Questions (FAQ):

Q: What does "DNV Approved" mean for this valve, and is the certificate provided?
A: "DNV Approved" signifies that the valve design, materials, manufacturing process, and testing have been assessed and approved by Det Norske Veritas, a leading international maritime classification society. This approval is crucial for its use on classified ships. A copy of the relevant approval certificate or documentation is typically available upon request for procurement and compliance purposes.
Q: Can this valve be used for both liquid and gas flow control on ships?
A: Yes, it is designed for controlling various fluids common in marine systems, including seawater, freshwater, fuel oil, lubricating oil, bilge water, and certain gases. The specific seat material selection (PTFE, EPDM, or metal) should be chosen based on the fluid type, temperature, and pressure to ensure optimal performance and longevity.
Q: How does the 4-20mA signal input work, and what control systems can it connect to?
A: The 4-20mA signal is an analog standard. A control system (like a PLC or DCS) sends a current signal between 4mA (typically commanding the valve to close) and 20mA (commanding it to fully open). The valve's actuator interprets this signal to position the disc proportionally. It can connect to virtually any modern industrial or marine control system that supports analog output modules.
Q: Are different voltage supplies available for the electric actuator?
A: Yes. Standard options include AC 110V and 220V, as well as DC 24V, which is common in marine control panels. Other voltage requirements can be accommodated as a customizable option. Please specify your required power supply during inquiry.
Q: What is the typical delivery time for this product?
A: For standard sizes and configurations, delivery time is generally within 30-45 days after order confirmation. Customized orders (special materials, sizes, or actuator features) may require additional time. Our multiple shipment ports (Shanghai, Guangzhou, Hongkong, Beijing) facilitate efficient logistics.
Q: Does the valve come with a manual override feature?
A: Most models of the electric regulating actuator include a manual override mechanism, such as a handwheel or lever. This allows for manual operation in case of power failure or during maintenance, ensuring system functionality is maintained.
Q: What kind of maintenance does this valve require?
A: Maintenance is minimal due to its robust design. Periodic checks might include verifying the actuator's electrical connections, ensuring the sealing surfaces are clean, and checking for any external corrosion. The long-life seat materials significantly reduce the need for internal maintenance compared to other valve types.
Q: Can you provide technical support for integration into our ship's control system?
A> As a manufacturer, we provide comprehensive technical documentation including wiring diagrams, signal interfacing details, and installation guidelines. We can also offer basic integration support and are available to answer specific technical questions during your installation and commissioning phase.