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As a leading manufacturer specializing in industrial valve solutions since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance GB/T5744-1993 Marine Quick Closing Valve with Manual Reset Function. Engineered for critical marine and offshore applications, this valve represents our commitment to safety, reliability, and compliance with stringent national standards. With an annual export value reflecting our global reach across markets from North America to Southeast Asia, we understand the demanding requirements of shipbuilders and marine engineers. This valve is designed to provide immediate and fail-safe isolation of pipelines in emergency situations, protecting personnel, equipment, and the marine environment. Our manufacturing process, backed by ISO9001 certification, ensures each valve delivers consistent performance where it matters most.
The core purpose of this quick closing valve is to act as a critical safety component within shipboard piping systems. In the event of a fire, rupture, or other hazardous condition, the valve is designed to close automatically and rapidly, isolating a section of the pipeline to prevent the escalation of the incident. The integrated manual reset function is a key feature, allowing for safe and controlled re-opening of the line by authorized personnel only after the emergency has been fully assessed and resolved. This prevents accidental or premature reopening that could lead to further danger.
Key Product Features & Technical Advantages:
- Compliant Design: Manufactured in strict accordance with the Chinese National Standard GB/T5744-1993, which specifies the technical requirements for quick-closing valves used on ships. This ensures compatibility and acceptance in shipbuilding and repair yards, particularly for vessels destined for or operating in regions that recognize this standard.
- Rapid & Reliable Closure: Utilizes a robust closing mechanism (typically spring-loaded or pneumatic/hydraulic actuator-assisted) that ensures closure within the timeframes specified by the standard, minimizing the release of flammable or hazardous fluids.
- Manual Reset Safety: The valve cannot re-open automatically after tripping. The manual reset requires deliberate human intervention, adding a critical layer of procedural safety and ensuring the system is only brought back online when safe to do so.
- Durable Construction: Available in materials suitable for marine environments, such as cast steel for general service or stainless steel for corrosion-resistant applications. All materials are selected for strength and longevity against saltwater, humidity, and temperature variations.
- Versatile Configurations: We offer customization to meet specific project needs. This includes various size ranges, pressure ratings, end connections (flanged as standard), and choice of actuator type (if not purely mechanical spring).
- Easy Integration & Maintenance: Designed for straightforward installation into existing piping systems. The mechanism is accessible for inspection and maintenance as per marine survey schedules.
The following table outlines some of the typical specifications available. Custom specifications can be developed upon request to match your exact system drawings and requirements.
| Parameter | Typical Specification / Option |
| Design Standard | GB/T5744-1993 |
| Nominal Diameter (DN) | DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Pressure Rating (PN) | PN10, PN16, PN25, PN40 |
| Body Material | Cast Steel (WCB), Stainless Steel (CF8/304, CF8M/316) |
| Seat Material | Stainless Steel, Enhanced Polymer (depending on media) |
| Connection Type | Flanged (RF, FF), other ends available |
| Operating Temperature | -20°C to +200°C (material dependent) |
| Applicable Media | Fuel Oil, Lubricating Oil, Cargo Oil, Sea Water, Fire-fighting Water |
Benefits for Your Marine Projects:
- Enhanced Safety Compliance: Directly supports compliance with ship safety codes and class society rules (where GB/T standard is accepted), facilitating smoother vessel inspections and certifications.
- Risk Mitigation: Significantly reduces the risk of fire spread or pollution by enabling rapid isolation of damaged or leaking pipeline sections.
- Operational Control: The manual reset empowers the crew to maintain control over system recovery, ensuring operational decisions are made deliberately.
- Reduced Lifetime Cost: Durable construction and reliable performance lead to lower maintenance needs and a longer service life, providing strong value over time.
- Supply Chain Reliability: Sourcing from an ISO9001-certified manufacturer with a proven export track record ensures consistent quality, reliable lead times, and professional technical support.
Frequently Asked Questions (FAQ):
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Q: Is the GB/T5744-1993 standard accepted by international marine classification societies?
A: While GB/T is a Chinese national standard, it is widely recognized and accepted, particularly for vessels built in or for the Chinese market, and those trading in regions where it is applicable. It is always advisable to confirm with your specific classification society (e.g., ABS, DNV, LR, CCS) for project approval. Our valves can also be manufactured to other international standards upon request. -
Q: How does the manual reset function work?
A: After the valve closes automatically due to a tripping mechanism (e.g., fusible link melting in a fire, remote pneumatic signal, or manual trip station), the closing mechanism remains engaged. To reopen, an operator must manually disengage the lock/release mechanism and often use a handwheel or lever to positively reopen the valve. This action is intentional and prevents automatic reflow. -
Q: What are the typical triggering methods for the automatic closure?
A: Common methods include: a fusible link that melts at a set temperature (fire detection), a remote pneumatic or hydraulic control line from the bridge or engine control room, a local manual trip cable/lever, or an electric signal from a fire or gas detection system. The specific trigger is often specified by the ship designer. -
Q: Can this valve be customized for different pressures and sizes?
A: Yes. As a manufacturer, we specialize in customization. The standard range covers DN15 to DN300 and PN10 to PN40, but we can engineer valves for higher pressures or special sizes based on your detailed requirements and system drawings. -
Q: What is the lead time for an order?
A: Lead time depends on the order quantity, specification complexity, and customization level. For standard configurations, typical lead times range from 4 to 8 weeks. We provide accurate timelines upon receipt of your formal inquiry or purchase order. -
Q: What kind of testing do these valves undergo?
A> Valves are subjected to routine tests as per GB/T5744-1993 and our ISO9001 quality plan, which typically includes shell strength tests, seat leakage tests, and functional tests of the quick-closing and reset mechanisms. Certified test reports can be provided. -
Q: Do you provide installation and maintenance guidance?
A: Absolutely. Comprehensive installation, operation, and maintenance manuals are provided with each shipment. Our technical team is also available to support your engineers during the planning and installation phases.
Trust in the expertise of Shanghai Zhibang Valve, a manufacturer with a solid foundation since 2016 and a demonstrated global footprint, exporting to diverse markets from the Americas to Europe, Asia, and Africa through major ports like Shanghai and Guangzhou. Our ISO9001 certification is a testament to our systematic approach to quality control in every valve we produce. Choosing our GB/T5744-1993 Marine Quick Closing Valve means investing in a safety-critical component that combines regulatory compliance with robust engineering. We invite shipyards, marine equipment distributors, and vessel operators to contact us for detailed quotations, technical data sheets, and to discuss how we can tailor this vital safety solution to your next project.
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