When it comes to underwater lifting and salvage operations, safety and control are everything. Whether you're working in offshore construction, pipeline recovery, or wreck removal, using the right equipment can make the difference between success and failure. One of the most dependable tools in underwater lifting is the Fully Enclosed Subsea Airlift Bag—a robust and controlled buoyancy device specifically designed for demanding subsea environments.

What is a Fully Enclosed Subsea Airlift Bag?

A Fully Enclosed Subsea Airlift Bag is a heavy-duty lifting device used to raise objects from the seabed to the surface. Unlike parachute-style lift bags that have an open bottom, fully enclosed lift bags are completely sealed. This design provides a more controlled and safer lift, especially in rough waters or when lifting valuable or delicate items.

These bags are made of high-strength PVC or polyurethane-coated fabric and are equipped with inflation/deflation valves, over-pressure relief valves, and strong harness points for attachment to the load.

Key Features and Advantages

  • 100% Enclosed Design

The fully enclosed structure ensures the air remains trapped within the bag throughout the lift. This minimizes the risk of sudden deflation or buoyancy loss, offering a safer lifting process.

  • Ideal for Heavy and Delicate Loads

Because the bag maintains constant internal pressure and buoyancy, it allows for precise control over ascent—crucial when lifting expensive machinery, pipelines, or fragile marine structures.

  • Built-In Safety Features

Most fully enclosed lift bags include multiple safety valves that prevent over-inflation and allow emergency deflation when needed. This adds an extra layer of protection for divers and equipment.

  • Reusable and Durable

Designed to withstand harsh subsea conditions, these bags are UV resistant, tear-resistant, and suitable for repeated use, making them cost-effective over time.

  • Versatile Applications

They can be used at any depth and are suitable for both shallow and deep-water operations, making them a go-to for subsea contractors around the globe.

Common Uses of Fully Enclosed Subsea Airlift Bags

  • Salvaging sunken boats or equipment

  • Offshore oil and gas platform maintenance

  • Subsea pipeline installation or removal

  • Wreckage recovery and marine construction

  • Scientific research and underwater archaeology

Final Thoughts

In marine environments where conditions can change rapidly, fully enclosed subsea airlift bags provide peace of mind through secure, stable, and controlled lifting. Their ability to contain air under pressure without escape ensures reliability, while their robust design makes them suitable for various underwater applications.

If your operations require safe, precise, and efficient lifting below the surface, investing in a high-quality fully enclosed airlift bag is a must.

Liftek is your trusted partner and top lifting & rigging equipment supplier in the UAE and Middle East, offering premium-grade fully enclosed subsea airlift bags and other lifting solutions. Whether you're in oil & gas, shipping, construction, or marine engineering, Liftek provides high-performance tools built for every industry need.