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Help CenterMarine Electric Regulating Butterfly Valve for Seawater Cooling System Flow Regulation, 4-20mA Signal
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Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Marine Electric Regulating Butterfly Valve, specifically designed for precise flow regulation in seawater cooling systems. With over 8 years of manufacturing expertise since 2016, we have supplied reliable valve solutions to global markets including North America, Europe, and Southeast Asia. This valve combines a corrosion-resistant design with a 4-20mA modulating electric actuator, ensuring accurate and stable flow control even in harsh marine environments. Our ISO9001-certified production facility in Shanghai guarantees consistent quality and performance for every unit shipped.
The valve body is crafted from high-grade ductile iron or stainless steel, while the disc is made of nickel aluminum bronze – a material specially selected for exceptional resistance to seawater corrosion. The electric actuator supports both on-off and modulating control, accepting standard 4-20mA signals from PLCs or other control systems. This enables remote monitoring and fine-tuning of flow rates, making it ideal for ballast water management, engine cooling, and auxiliary seawater systems on ships and offshore platforms.
Key Features & Technical Specifications
- Corrosion-Resistant Materials: Nickel aluminum bronze disc and stainless steel shaft resist pitting and crevice corrosion in seawater.
- Precise Modulating Control: 4-20mA input signal allows 0-90° rotation with high positioning accuracy (≤1% hysteresis).
- Compact & Lightweight Design: Wafer or lug connection saves space and reduces installation costs.
- Robust Electric Actuator: IP67 waterproof rating, with manual override and position feedback (optional).
- Low Torque Operation: Eccentric disc design minimizes friction and extends valve life.
- Wide Size Range: DN50 to DN600, suitable for various pipe diameters.
- Pressure Ratings: PN10 / PN16 / ANSI Class 150 (customizable upon request).
- ISO9001 Certified: Full traceability and quality control from raw material to final testing.
| Parameter | Details |
|---|---|
| Valve Body Material | Cast Iron / Ductile Iron / Stainless Steel (SS316) |
| Disc Material | Nickel Aluminum Bronze (UNS C95800) |
| Stem Material | Stainless Steel 316 / 17-4PH |
| Seat Material | EPDM / FKM (Viton) – resistant to seawater |
| Connection Type | Wafer (EN 1092-2) or Lug (ASME B16.5) |
| Actuator Type | Electric (On-Off / Modulating, 4-20mA) |
| Power Supply | AC 220V 50Hz / AC 380V 50Hz / DC24V (custom) |
| Ingress Protection | IP67 (standard), IP68 optional |
| Temperature Range | -20°C to +80°C (EPDM) / -10°C to +120°C (FKM) |
| Standards | ISO9001, API 609 (on request) |
Why Choose Our Marine Electric Regulating Butterfly Valve?
The combination of a robust mechanical design and intelligent electric actuation makes this valve a top choice for shipbuilders and offshore operators. The 4-20mA modulating function allows seamless integration with existing automation systems, reducing manual intervention and improving system efficiency. Moreover, the nickel aluminum bronze disc has been proven to last significantly longer than standard materials in seawater applications, minimizing maintenance costs and downtime.
Shanghai Zhibang Valve Manufacture Co., Ltd. has been a reliable partner for marine valve supplies since 2016. Our annual export value reaches USD 1-1.5 million, covering diverse markets from the Americas to Oceania. Each valve is individually tested for pressure, leakage, and signal response before shipment. With our strong R&D team, we can also customize the valve’s dimensions, actuator voltage, and control features to meet specific project requirements.
Trust & Credibility: We hold ISO9001 certification, ensuring rigorous quality management throughout production. Our products have been shipped to major ports worldwide via Shanghai, Guangzhou, Hong Kong, and Beijing. Customer feedback highlights our consistent delivery times and responsive after-sales support. Choose Zhibang Valve for a durable, precise, and cost-effective flow control solution for your seawater cooling systems.
Frequently Asked Questions (FAQ)
Q1: Can this valve be used for fluids other than seawater?
Yes, the materials can be adapted for fresh water, brine, or mild chemical solutions. The nickel aluminum bronze disc also performs well in applications with moderate chlorides.
Q2: What is the accuracy of the 4-20mA control?
The actuator provides a positioning accuracy of ±1% of full travel. Hysteresis is typically less than 1%, ensuring repeatable flow adjustments.
Q3: Do you offer explosion-proof actuators for hazardous areas?
Yes, explosion-proof versions with ATEX or IECEx certification are available upon request. Please specify the zone classification when ordering.
Q4: What is the standard lead time?
For standard sizes (DN50–DN300) and common materials, lead time is 15–20 working days. Custom orders typically require 25–35 days, depending on complexity.
Q5: How does the valve handle biofouling in seawater?
The smooth disc surface and self-cleaning seat design reduce the accumulation of marine growth. Adding an optional anti-fouling coating can further enhance performance.
Q6: Can the actuator provide position feedback?
Yes, an auxiliary 4-20mA feedback signal or potentiometer output is available as an option for closed-loop control.
Q7: What maintenance is required?
Periodic inspection of the actuator seals and electrical connections is recommended. The valve itself requires minimal maintenance due to its corrosion-resistant materials.
Q8: Do you provide test certificates or material certificates?
Yes, we can provide material test reports, pressure test reports, and a certificate of conformity for each batch. Third-party inspection is also accepted.
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