Air lifting bag

ECONAD Air Lifting Bags can be used for:

• Underwater lifting and salvage operations
• Lifting objects from the seabed
• Marine rescue operations
• Buoyancy support for submerged structures
• Installation of underwater pipelines and cables
• Positioning of marine structures
• Vessel and equipment recovery
• Supporting objects during underwater construction
• Floating and transportation of marine equipment
• Temporary buoyancy during installation and maintenance works

The bags can be used individually or combined into a multi-bag lifting system when higher lifting capacity or improved load distribution is required.

Air lifting bags provide a practical method of generating underwater lifting force without requiring large surface-based lifting equipment.

The deflated bag is positioned and secured to the object using lifting straps or attachment points. Compressed air is then introduced gradually, increasing buoyancy until the required lifting force is achieved.

By controlling the amount of air inside the bag, operators can manage buoyancy during lifting, positioning and recovery operations.

The fully enclosed cylindrical construction allows the lifting bag to operate in different underwater positions while maintaining the air required to generate buoyancy.

This makes the system suitable for underwater lifting, controlled flotation and applications where the bag may change orientation during operation.

The lifting bags are manufactured from UV-resistant PVC-coated fabric designed for demanding marine and outdoor environments.

The flexible construction combines high strength with compact storage dimensions, allowing the equipment to be folded when not in use and rapidly deployed when required.

High-flow pressure relief valves help protect the lifting bag against excessive internal pressure.

As the bag rises toward the surface, surrounding water pressure decreases and the air inside expands. The relief system allows excess air to escape and helps maintain safe operating pressure during lifting operations.

Air lifting bags can be supplied as complete operational kits with the necessary accessories.

Depending on the configuration, the package may include:

• Air lifting bag
• Lifting straps
• Attachment belts
• Inflation valves
• Pressure relief valves
• Air hoses
• Connection fittings
• Control accessories
• Storage and transportation equipment

Complete configurations can be adapted according to the lifting capacity and operational requirements of the project.

ECONAD Air Lifting Bags are assembled and tested before delivery.

The lifting bags are designed with a 5:1 safety factor, providing an additional safety margin for professional underwater lifting and marine operations.

One of the main advantages of pneumatic lifting bags is their compact size when deflated.
Unlike rigid lifting equipment, the bags can be folded for transportation and storage, allowing significant lifting capacity to be transported using relatively little space.

This makes them particularly suitable for:

• Emergency response teams
• Diving contractors
• Marine construction companies
• Salvage operators
• Offshore service companies
• Ports and shipyards

Different underwater operations require different lifting capacities, dimensions and attachment arrangements.
ECONAD can manufacture air lifting bags in custom sizes and configurations according to project requirements.

Customisation may include:

• Required lifting capacity
• Bag dimensions
• Number and position of lifting points
• Lifting strap configuration
• Valve arrangement
• Hose and inflation system
• Working pressure
• Accessories and control equipment

• High Lifting Capacity: Pneumatic buoyancy provides an effective solution for lifting and supporting heavy underwater objects.
• Controlled Buoyancy: The amount of air introduced into the bag can be regulated according to the required lifting force and operating conditions.
• Compact Storage: The flexible construction allows the bags to be folded into a relatively small package for transportation and storage.
• Durable Construction: UV-resistant PVC-coated fabric provides reliable performance in marine environments.
• Pressure Protection: High-flow relief valves help protect the bag from excessive internal pressure.
• Modular Lifting System: Several lifting bags can be used together to achieve greater lifting capacity and improve load distribution.
• Custom Manufacturing: Bag dimensions, lifting capacity and accessories can be adapted to individual project requirements.