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Home > Industrial Equipment & Components > Valve > Other Valves & Parts > GB/T5744-1993 Marine Quick Closing Valve for Bilge and Ballast Systems

GB/T5744-1993 Marine Quick Closing Valve for Bilge and Ballast Systems

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Product Spotlights

ISO9001-certified marine quick closing valve compliant with GB/T5744-1993 for bilge/ballast systems. Features rapid sub-5-second closure, robust corrosion-resistant materials (bronze/steel/SS), and multiple actuation options (manual/pneumatic/hydraulic). Enhances vessel safety, ensures regulatory compliance, and offers reliable performance in harsh maritime environments. Available in sizes DN15-DN300.

Negotiable MOQ: 20 Units (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Bronze, Cast Steel, Stainless Steel

Size Range:

DN15 to DN300 (1/2“ to 12“)

Connection Type:

Flanged, Threaded, Welded

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

shanghai

Delivery Detail:

7 days

Product Details
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Material Bronze, Cast Steel, Stainless Steel

Size Range DN15 to DN300 (1/2“ to 12“)

Connection Type Flanged, Threaded, Welded

Pressure Rating PN10, PN16, PN25, 150LB, 300LB

Operating Mode Manual, Pneumatic, Hydraulic

Standard Compliance GB/T5744-1993, ISO 15540-1

Application Bilge, Ballast, Tank, Pipeline Systems

Temperature Range -20°C to +200°C

Closure Speed Less than 5 seconds

Design Type Butterfly, Gate, Globe, Ball Valve

As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance marine valves that meet stringent international standards. Our GB/T5744-1993 Marine Quick Closing Valve is engineered specifically for the demanding environments of bilge and ballast systems, where reliability and rapid response are critical for vessel safety and operational efficiency. With years of experience since our establishment in 2016 and a strong export presence across global markets, we understand the precise requirements of shipbuilders and marine engineers. This valve represents our commitment to delivering robust, durable, and compliant solutions that enhance the safety protocols of modern maritime vessels. The quick-closing mechanism is designed to prevent flooding, control ballast transfer, and isolate sections of the pipeline system in emergency situations, making it an indispensable component for any vessel's watertight integrity system.

Core Design Features & Technical Advantages:

Rapid Emergency Response: The valve is designed to achieve full closure in under 5 seconds from the initiation signal, crucial for containing water ingress during hull breaches or system failures in bilge and ballast lines.
Robust Construction for Harsh Environments: Available in materials like bronze, cast steel, and stainless steel (316/316L), the valve body and internal components resist corrosion from seawater, bilge water, and ballast tank sediments.
Multiple Actuation Options: To suit different vessel designs and control systems, the valve can be operated manually, or via pneumatic or hydraulic actuators for remote operation from the bridge or engine control room.
Compliance & Standardization: Manufactured in strict accordance with the Chinese national standard GB/T5744-1993, which aligns with international maritime safety conventions. The design also considers requirements from classification societies.
Versatile Sizing & Connection: We offer a comprehensive size range from DN15 (1/2") to DN300 (12") with flanged, threaded, or welded ends to integrate seamlessly into existing ship piping systems.
Bubble-Tight Seal: Utilizes advanced sealing materials (such as EPDM, Viton, or PTFE) that ensure a bubble-tight seal even after repeated cycles, preventing leakage that could compromise stability or environmental compliance.
Fail-Safe Operation: The actuator system is typically configured as fail-safe (spring-return or dual-acting), ensuring the valve closes automatically upon loss of power or control signal, a critical safety feature.
Low Maintenance Design: Features like sealed bearings, corrosion-resistant stems, and accessible bonnets reduce maintenance intervals and downtime, which is vital for vessels on long voyages.

Technical Specifications & Parameters:

Parameter	Specification / Options
Design Standard	GB/T5744-1993 (Marine Quick Closing Valves)
Pressure Rating	PN10, PN16, PN25 / 150LB, 300LB
Temperature Range	-20°C to +200°C (dependent on seat material)
Valve Type	Butterfly, Gate, Globe, Ball (Quick-Closing Design)
Actuator Type	Manual Handwheel, Pneumatic, Hydraulic
Closure Time	< 5 seconds (for actuated versions)
Seat Material	EPDM, NBR, Viton, PTFE, Metal
Body Material	Bronze, Cast Steel (WCB, WCC), Stainless Steel (CF8/CF8M)

Benefits for Ship Owners & Builders:

Enhanced Vessel Safety: Directly contributes to meeting SOLAS (Safety of Life at Sea) requirements for watertight subdivision and damage control, potentially lowering insurance premiums.
Operational Reliability: Minimizes the risk of uncontrolled flooding or incorrect ballast transfer, protecting cargo, machinery, and the vessel's stability.
Regulatory Compliance: Provides documented evidence of compliance with GB/T5744-1993, facilitating smoother inspections by classification societies and port state control.
Reduced Lifecycle Costs: Durable construction and low-maintenance design lead to fewer replacements and repairs over the vessel's service life.
System Integration Flexibility: Multiple actuation and connection options allow for easy integration into both newbuild projects and retrofit upgrades.

Backed by our ISO9001-certified manufacturing processes and an annual export value reflecting consistent global trust, Shanghai Zhibang Valve stands as a reliable partner in maritime safety. Our valves are shipped worldwide from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery to shipyards in North America, Europe, Asia, and beyond. We invite shipyards, naval architects, and marine procurement specialists to consult with us for tailored valve solutions. Contact us today to discuss how our GB/T5744-1993 compliant quick closing valves can be specified for your next project, enhancing the safety and efficiency of your maritime operations.

Frequently Asked Questions (FAQ)

What is the primary purpose of this quick closing valve on a ship?
Its main purpose is to rapidly isolate sections of the bilge or ballast piping system in an emergency, such as a pipe rupture or hull damage, to prevent uncontrolled flooding and maintain the vessel's stability and watertight integrity.
How does the "quick closing" feature work?
The valve is equipped with a specially designed actuator (pneumatic, hydraulic, or a manual rapid-close mechanism) that allows it to move from fully open to fully closed in a very short time, typically under 5 seconds, upon receiving a trigger signal or manual intervention.
Can this valve be used for services other than bilge and ballast?
While designed for bilge and ballast per GB/T5744-1993, its robust construction and quick-closing capability make it suitable for other critical marine applications requiring rapid isolation, such as tank vent lines, fire main systems, or other seawater services, subject to pressure and material compatibility.
What materials are recommended for seawater service?
For prolonged exposure to seawater, we generally recommend bronze or stainless steel (CF8M/316) for the body and internal parts, paired with seawater-resistant elastomers like EPDM or Viton for seals, to ensure maximum corrosion resistance.
Is remote operation possible, and how is it integrated?
Yes, with pneumatic or hydraulic actuators, the valve can be operated remotely from a central control panel on the bridge or in the engine room. Integration typically involves connecting the actuator to the ship's control air/hydraulic system and electrical control circuits.
What is the meaning of the GB/T5744-1993 standard?
GB/T5744-1993 is a Chinese National Standard titled "Marine Quick Closing Valves." It specifies the design, manufacturing, testing, and performance requirements for quick-closing valves used in marine bilge, ballast, and other systems where rapid closure is a safety necessity.
Do you provide documentation for classification society approval?
We can provide standard material certificates, test reports (pressure test, function test), and manufacturing data sheets. Specific documentation required for approval by societies like ABS, DNV, LR, or BV can be discussed and arranged based on project requirements.
What is the typical lead time for an order?
Lead time varies based on valve size, material, actuation type, and order quantity. Standard configurations often have shorter lead times. Please contact our sales team with your specific requirements for an accurate production and delivery schedule.