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Help CenterCB/T3191 Flanged Electric Marine Ball Valve, Explosion-Proof Design, Manual Override Feature
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As a professional valve manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable fluid control solutions for demanding marine and industrial applications. Our CB/T3191 Flanged Electric Marine Ball Valve, featuring an explosion-proof design and a manual override feature, is engineered to ensure safety, durability, and precise control in critical onboard and offshore systems. With years of experience since our establishment in 2016 and a strong export presence across continents, we understand the stringent requirements of the maritime industry and deliver products that meet and exceed expectations.
This valve is designed for superior performance in marine environments where reliability is non-negotiable. Its core construction and features are tailored to handle seawater, fuels, lubricants, and other media commonly found on ships and offshore platforms.
- Robust Explosion-Proof Design: The electric actuator is housed in a certified explosion-proof enclosure, preventing internal sparks or arcs from igniting surrounding flammable atmospheres. This is crucial for safety in engine rooms, pump rooms, and areas handling volatile substances.
- Essential Manual Override: A built-in handwheel or lever allows for manual operation in case of power failure or during maintenance, ensuring continuous system operation and enhancing operational safety and flexibility.
- Corrosion-Resistant Construction: Available in materials like stainless steel (CF8/CF8M) or coated carbon steel, the valve body and components offer excellent resistance to saltwater corrosion, extending service life in harsh marine conditions.
- Bubble-Tight Sealing: Utilizing advanced seat materials such as reinforced PTFE or metal seats, the valve provides reliable, leak-proof sealing even after prolonged cycles and under varying pressure conditions.
- Low Torque Operation: The full-port or reduced-port ball design ensures smooth, low-friction rotation, reducing the required operating torque and minimizing wear on the actuator.
- Versatile Actuator Compatibility: The electric actuator can be configured with various control signals (e.g., ON/OFF, 4-20mA, 0-10V) and voltages (e.g., 24VDC, 110VAC, 220VAC, 380VAC) to integrate seamlessly with your ship's automation system.
The technical specifications of our CB/T3191 Flanged Electric Marine Ball Valve are detailed below. Please note that specific parameters can be customized based on project requirements.
| Parameter | Specification / Option |
|---|---|
| Design Standard | CB/T3191 (China Ship Standard) |
| Valve Size Range (DN) | 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300 |
| Pressure Rating (PN) | 10, 16, 25, 40 |
| Body Material | WCB (Carbon Steel), CF8 (304 SS), CF8M (316 SS), Ductile Iron |
| Seat & Seal Material | PTFE, Reinforced PTFE, PPL, Metal (Stainless Steel) |
| End Connection | Flanged (RF, FF). Standards: GB, ANSI, JIS, DIN. |
| Operating Temperature | -20°C to +180°C (dependent on seat material) |
| Explosion-Proof Class | Ex d IIC T6 Gb / Ex d IIB T6 Gb (or equivalent, available upon request) |
| Electric Actuator Type | Multi-turn, ON/OFF or Modulating Control |
| Manual Override | Integrated Handwheel or Lever |
Choosing our valve brings distinct advantages to your operations. The explosion-proof certification mitigates fire and explosion risks, a critical factor for vessel safety audits and insurance. The manual override provides a reliable backup, preventing costly downtime. Compliance with the CB/T3191 standard ensures the valve is fit for marine service, covering aspects like materials, pressure testing, and marking. Furthermore, the flanged connection simplifies installation and maintenance compared to welded alternatives. Our valves contribute to reduced maintenance costs, enhanced system safety, and reliable long-term performance in challenging sea conditions.
Shanghai Zhibang Valve backs this product with a solid manufacturing foundation. Our ISO9001-certified quality management system governs every production stage, from raw material inspection to final testing. With an annual export value ranging between US$1 Million and US$1.5 Million, our products have gained trust in diverse markets including North America, Europe, Southeast Asia, and Africa. We offer flexible shipping from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery. Partner with us for a marine ball valve solution that combines technical compliance, operational safety, and manufacturer reliability. Contact us today to discuss your specific requirements or to request a detailed quotation.
Frequently Asked Questions (FAQ)
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Q: What does the "CB/T3191" standard signify for this valve?
A: CB/T3191 is a Chinese national standard specifically for marine valves. It defines the technical requirements, testing methods, inspection rules, and markings for valves used on ships, ensuring they meet the necessary performance, material, and safety criteria for maritime applications. -
Q: In which specific areas on a ship is this explosion-proof valve typically used?
A: It is commonly installed in hazardous zones such as the engine room, fuel oil service and transfer lines, cargo pump rooms (for tankers), paint lockers, and any area where flammable vapors or gases may be present, as classified by ship safety rules. -
Q: How does the manual override function work?
A: The electric actuator is equipped with a manual handwheel or lever. By disengaging the clutch (often a simple switch or knob on the actuator), you can directly operate the valve stem using the handwheel, allowing for open/close control without electrical power. -
Q: Can you provide valves with flanges matching international standards like ANSI or DIN?
A: Yes, we can. While the valve design follows CB/T3191, the flange dimensions and facing can be manufactured to suit various standards including ANSI B16.5, DIN, JIS, or GB upon request, ensuring compatibility with your existing pipeline systems. -
Q: What is the lead time for an order of these valves?
A: Lead time depends on the order quantity, size, material, and actuator specifications. Standard configurations may have shorter lead times. We recommend contacting us with your detailed requirements for an accurate production and delivery schedule. -
Q: What kind of warranty or after-sales support do you offer?
A: We provide a standard warranty against manufacturing defects. Our technical team offers support for installation guidance, troubleshooting, and can supply spare parts like seals and seats to ensure the long-term operation of your valves. -
Q: Is the electric actuator suitable for modulating (proportional) control, or only for ON/OFF?
A: Both options are available. You can choose a standard ON/OFF actuator or specify a modulating actuator that accepts control signals (e.g., 4-20mA) for precise flow regulation. Please indicate your control needs when inquiring. -
Q: Do you perform pressure tests on each valve before shipment?
A> Yes, as part of our ISO9001 quality procedures, each valve undergoes rigorous factory acceptance tests, which typically include shell tests and seat leak tests according to relevant standards, to verify its pressure integrity and sealing performance.
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