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Help CenterFlanged Marine Explosion Proof Electric Butterfly Valve, 4-20mA Control Signal
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As a specialized manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our Flanged Marine Explosion Proof Electric Butterfly Valve. Engineered for the most demanding marine and offshore applications, this valve integrates robust construction with precise 4-20mA control, ensuring reliable and safe flow regulation in hazardous environments. Our decade of experience since 2016, coupled with an annual export value exceeding US$1 million, underscores our commitment to delivering high-performance fluid control solutions trusted by clients across North America, Southeast Asia, Europe, and beyond.
This valve is designed to meet the stringent safety and performance requirements of marine engineering, oil & gas platforms, chemical tankers, and coastal processing plants. Its core value lies in providing fail-safe operation and precise flow control where explosive atmospheres are a constant concern.
Key Features & Technical Advantages:
- Intrinsically Safe Design: The explosion-proof electric actuator housing is meticulously crafted to contain any internal ignition, preventing it from triggering an external explosive atmosphere. It is certified for Groups IIC/IIB, making it suitable for a wide range of hazardous gases.
- Precise Analog Control: The 4-20mA control signal interface allows for seamless integration with modern Distributed Control Systems (DCS) and Programmable Logic Controllers (PLC), enabling remote operation, proportional control, and real-time valve position feedback.
- Marine-Grade Durability: The valve body is available in materials like cast iron with epoxy coating or stainless steel (SS316) to withstand corrosive seawater, high humidity, and UV exposure. The flanged connection ensures a leak-proof, high-integrity fit to piping systems.
- High-Performance Sealing: Multiple elastomer options (EPDM, NBR, Viton) and PTFE seats provide excellent sealing performance across a broad temperature range and with various media, including seawater, chemicals, oils, and gases.
- Low Maintenance & Long Service Life: The robust design of the disc, stem, and actuator minimizes wear. The unit requires minimal routine maintenance, reducing downtime and total cost of ownership for vessel operators.
Technical Specifications Table:
| Parameter | Specification |
| Actuator Type | Electric, Explosion-Proof |
| Control Signal | 4-20mA DC (Analog), with optional feedback |
| Power Supply | AC110V/220V/380V, 50/60Hz (Customizable) |
| Nominal Diameter (DN) | 50, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600 |
| Nominal Pressure (PN) | 6, 10, 16, 25 |
| Flange Standard | ANSI, DIN, JIS, GB (Available upon request) |
| Body Material | Cast Iron (GG25), Ductile Iron (GGG40), Stainless Steel 304/316 |
| Seal Material | EPDM, NBR, PTFE, Viton (FKM) |
| Operating Temp. Range | -20°C to +150°C (dependent on seat material) |
| Protection Degree | IP67 / IP68 (Submersible options) |
The benefits for our clients are clear: enhanced operational safety through certified explosion-proof design, improved process control efficiency via analog signal integration, reduced maintenance costs due to robust construction, and compliance with international marine and industrial standards. This valve is a critical component for ensuring system integrity and safety on board.
Frequently Asked Questions (FAQ):
-
Q: What does "Explosion Proof" mean for this valve?
A: It means the electric actuator's enclosure is designed to withstand an internal explosion of flammable gas or vapor and prevent the ignition from propagating to the external hazardous atmosphere, as per relevant Ex standards. -
Q: Can this valve be used for seawater applications?
A: Yes. We recommend specifying a body material like epoxy-coated cast iron or stainless steel (SS316) along with an EPDM or Viton seal to ensure maximum corrosion resistance against seawater. -
Q: How does the 4-20mA control work?
A: The valve actuator receives a 4-20mA current signal from your control system. Typically, 4mA corresponds to the valve fully closed, 20mA to fully open, and any value in between allows for precise proportional positioning. -
Q: What explosion protection classifications does it have?
A> Our valves typically meet Ex d IIC T6 or Ex d IIB T6 ratings, suitable for different gas groups and temperature classes. Specific certification details are available upon request. -
Q: What is the lead time for an order?
A> Standard configurations typically have a lead time of 4-6 weeks. For large orders or custom specifications, our sales team will provide a precise timeline. -
Q: Do you provide manual override on the electric actuator?
A> Yes, a manual handwheel or crank override is available as a standard or optional feature, allowing for manual operation in case of power failure or for maintenance. -
Q: What are the main shipping ports?
A> We ship globally from major Chinese ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient logistics to your destination. -
Q: Is your company certified?
A> Yes, Shanghai Zhibang Valve Manufacture Co., Ltd. holds ISO9001:2015 Quality Management System certification, ensuring consistent product quality and reliable manufacturing processes.
Backed by our ISO9001-certified manufacturing processes and a proven track record of supplying valves to a global clientele across six continents, you can trust the reliability and performance of our Flanged Marine Explosion Proof Electric Butterfly Valve. Our annual export volume of US$1-1.5 million is a testament to the satisfaction of our international customers in sectors from offshore drilling to shipbuilding. We invite you to contact us for a detailed quotation or technical consultation. Let us provide you with a robust, safe, and efficient flow control solution tailored to your specific marine application requirements.
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