Pillow Underwater Air Lifting Bags High Buoyancy Durable Construction Wear

Product Specification

Pillow Underwater Air Lifting Bags High Buoyancy Durable Construction Wear Resistant

Description

The Pillow Type Underwater Air Lift Bags are high-performance inflatable lifting solutions designed for underwater salvage, construction, and emergency buoyancy applications. Constructed from heavy-duty PVC-coated fabric, these lift bags provide reliable, high-capacity lifting while maintaining durability under harsh underwater conditions. Their pillow-like design ensures stability during ascent, preventing tilting or uncontrolled movement of lifted objects. Equipped with overpressure relief valves and reinforced seams, these bags are engineered for safe, precise, and controlled underwater lifting operations.

Case Study

In a recent marine salvage project, a sunken 12-ton vessel had to be lifted from 25 meters depth in a coastal harbor. A team deployed four Pillow Type Underwater Air Lift Bags with a combined buoyancy rating of 15 tons. Each bag was carefully positioned under key structural points of the hull. The bags were inflated sequentially, allowing the vessel to gradually rise without sudden shifts or tilting. During the ascent, the overpressure relief valves ensured that internal air pressure remained safe, preventing ruptures. Once at the surface, the vessel was stabilized and towed to the repair dock. This operation highlighted the bags’ ability to handle heavy loads, maintain stability, and ensure diver safety during complex salvage operations. The versatility, ease of deployment, and reliability of the Pillow Type Air Lift Bags were critical to the success of this mission.

Specifications

Features

High Lifting Capacity and Buoyancy Control
The Pillow Type Underwater Air Lift Bags are engineered to provide exceptional lifting power. Available in a range of buoyancy ratings, they can lift small craft, heavy equipment, and submerged debris with precision. The pillow-shaped design ensures uniform distribution of buoyant force, reducing the risk of tilting or toppling during ascent. By controlling inflation rates and utilizing sequential deployment, operators can achieve smooth, controlled lifting even with asymmetrical loads. Overpressure relief valves provide an additional safety layer, allowing excess air to escape automatically and preventing dangerous pressure build-up. This level of control is critical for operations where precision and safety are paramount, such as raising historical shipwrecks or delicate marine structures.

Durable Construction for Harsh Environments
These lift bags are constructed from reinforced PVC-coated fabric designed to withstand abrasion, punctures, and UV exposure. High-strength seams and additional reinforcements at stress points ensure long-term reliability even in repeated, heavy-duty use. The material selection allows the bags to maintain flexibility at varying temperatures and underwater pressures, minimizing the risk of failure during critical lifting tasks. This durability extends the operational lifespan of the bags, making them a cost-effective solution for marine contractors, salvage teams, and underwater construction professionals.

Ease of Deployment and Operational Flexibility
Pillow Type Air Lift Bags are lightweight, compact, and easy to transport to remote sites. Their design allows for rapid setup, inflation, and deflation, reducing preparation time and labor costs. Standard air supply systems can be connected quickly, and integrated lifting harnesses facilitate precise positioning. The bags can be deployed individually or in groups, providing flexibility to handle loads of varying shapes and weights. This versatility is especially valuable in underwater construction, emergency recovery, or salvage operations where conditions can change rapidly, and timely action is essential.

Safety and Reliability
Safety is a core feature of the Pillow Type Air Lift Bags. Each bag includes overpressure relief valves to prevent rupture, as well as reinforced attachment points for secure connection to lifting lines. The pillow shape ensures stable lift dynamics, preventing rolling or flipping of submerged objects. Additionally, the high visibility color and durable outer coating assist divers in monitoring bag positions during underwater operations. The combination of these safety features ensures that both divers and equipment remain protected, allowing teams to complete complex lifts with confidence.

Applications

Marine Salvage Operations
Pillow Type Underwater Air Lift Bags are widely used in marine salvage to lift sunken vessels, debris, and heavy equipment from the seabed. Their high lifting capacity and controlled buoyancy make them ideal for delicate operations, ensuring submerged objects are raised without causing additional damage.

Underwater Construction and Installation
These lift bags assist in positioning large underwater structures such as pipelines, platforms, and subsea modules. Their stability and ease of deployment enable precise movement and placement of heavy objects in challenging underwater environments.

Emergency Flotation and Rescue
In emergency situations, Pillow Type Air Lift Bags provide rapid buoyancy support for stranded vessels, flooded docks, or submerged cargo. Their fast inflation and reliable lift capacity make them indispensable for maritime safety teams responding to urgent incidents.

Why Choose Hongruntong Marine

Proven Expertise in Marine Solutions
Hongruntong Marine has decades of experience in designing, manufacturing, and supplying high-quality marine equipment. Our team of engineers and technical experts ensures that each product meets stringent international safety and performance standards. This expertise translates into air lift bags that deliver reliable performance under the most challenging conditions.

Premium Materials and Manufacturing Standards
We use only the highest quality PVC-coated fabrics, reinforced seams, and advanced manufacturing techniques to produce durable and long-lasting air lift bags. Every batch undergoes rigorous quality control, including pressure testing, seam inspection, and material stress analysis, ensuring that customers receive a product capable of withstanding repeated heavy-duty use.

Customized Solutions and Technical Support
Understanding that every underwater operation has unique requirements, Hongruntong Marine offers tailored solutions, including custom buoyancy ratings, sizes, and deployment configurations. Our technical support team provides guidance on selection, setup, and safe operation, helping customers optimize their lifting operations and avoid costly mistakes.

Global Reputation and Reliability
Hongruntong Marine has built a strong international reputation for delivering reliable, high-performance marine equipment. Our products are used in salvage, offshore construction, and emergency response projects worldwide. Choosing Hongruntong means partnering with a trusted sup

plier who prioritizes safety, durability, and operational efficiency.

FAQ

1. What is the maximum lifting capacity of these bags?
Depending on the model, Pillow Type Underwater Air Lift Bags can lift from 500 kg up to 20 tons. Multiple bags can be combined for heavier loads.

2. How do I safely inflate the bags underwater?
Use a regulated air supply and monitor the lift closely. Inflate gradually, and use overpressure relief valves to prevent overinflation.

3. Are these bags reusable?
Yes. Made from durable PVC-coated fabric with reinforced seams, these bags can be used repeatedly when properly maintained.

4. Can they be used in saltwater?
Absolutely. The materials are corrosion-resistant and UV-stabilized, suitable for both saltwater and freshwater environments.

5. How should the bags be stored when not in use?
Deflate fully, clean with freshwater, dry completely, and store in a cool, shaded area to maintain material integrity.