Underwater air lift bags are designed to be deployed underwater and filled with compressed air to create buoyancy, allowing them to lift, stabilize, or move submerged objects easily.
Underwater air lift bags are highly effective and indispensable for a wide range of underwater operations, including commercial diving, marine salvage, and scientific research. Leveraging the principles of buoyancy and pressure, these bags provide a safe and efficient way to manage underwater workloads.
Key applications include salvaging vessels from the seabed to the surface, as well as lightening underwater static structures like pipes and templates. Parachute-type bags, designed with a water drop shape and an open bottom, are effective for various tasks and can be used at any depth. This design enhances safety by minimizing entanglement risks.
Underwater air lift bags are versatile and reliable, making them ideal for scuba diving lift bags, marine salvage bags, and other related applications. Whether you need to lift heavy objects, stabilize underwater structures, or manage workloads in challenging environments, these bags are the perfect solution.
Made of heavy duty PVC coated polyester fabric. Reach 10,000N/5cm.
We can provide the Third Party Certificate in compliance with IMCA D016
Certificate webbing harness (with 7:1 Safety Factor) terminate with end shackles.
Design safety working factor 5:1 at least complying with IMCA D016.
We weld all seams by high-frequency welding technology, no glue use.
All webbing harness point to a single ring for steady lifting
The standard color of our underwater air lift bags is yellow. The orange color is available upon request.
The below specification is for a common-sized air-lifting bag. In addition, we also make other sizes and other capacity open bottom air lift bags upon request.
Model | Capacity | Max.Diameter (m) | Filled Height (m) | Appr. Gross Weight (kg) |
|---|---|---|---|---|
OBP-50L | 50 KG | 0.3 | 1.1 | 2 |
OBP-100L | 100 KG | 0.6 | 1.3 | 5 |
OBP-250L | 250 KG | 0.8 | 1.7 | 7 |
OBP-500L | 500 KG | 1.0 | 2.1 | 14 |
OBP-1T | 1,000 KG | 1.2 | 2.3 | 24 |
OBP-2T | 2,000 KG | 1.7 | 2.8 | 30 |
OBP-3T | 3,000 KG | 1.8 | 3.0 | 35 |
OBP-5T | 5,000 KG | 2.2 | 3.5 | 56 |
OBP-6T | 6,000 KG | 2.3 | 3.6 | 60 |
OBP-8T | 8,000 KG | 2.6 | 4.0 | 100 |
OBP-10T | 10,000 KG | 2.7 | 4.3 | 130 |
OBP-15T | 15,000 KG | 2.9 | 4.8 | 180 |
OBP-20T | 20,000 KG | 3.1 | 5.6 | 200 |
OBP-25T | 25,000 KG | 3.4 | 5.7 | 230 |
OBP-30T | 30,000 KG | 3.8 | 6.0 | 290 |
OBP-35T | 35,000 KG | 3.9 | 6.5 | 320 |
OBP-50T | 50,000 KG | 4.6 | 7.5 | 450 |
OBP-100T | 100,000 KG | 5.7 | 8.7 | 600 |
Note: The above size and weight are only for reference. We may change its parameters according to our design.
The enclosed bottom parachute type lift bags have the same size as open bottom lift bags. But, there is one cover at the bottom. The user can open the cover according to the salvage project’s condition.
Model | Capacity | Max.Diameter (m) | Filled Height (m) | Appr. Gross Weight (kg) |
|---|---|---|---|---|
EBP-50L | 50 KG | 0.3 | 1.1 | 2 |
EBP-100L | 100 KG | 0.6 | 1.3 | 5 |
EBP-250L | 250 KG | 0.8 | 1.7 | 7 |
EBP-500L | 500 KG | 1.0 | 2.1 | 14 |
EBP-1T | 1,000 KG | 1.2 | 2.3 | 24 |
EBP-2T | 2,000 KG | 1.7 | 2.8 | 30 |
EBP-3T | 3,000 KG | 1.8 | 3.0 | 35 |
EBP-5T | 5,000 KG | 2.2 | 3.5 | 56 |
EBP-6T | 6,000 KG | 2.3 | 3.6 | 60 |
EBP-8T | 8,000 KG | 2.6 | 4.0 | 100 |
EBP-10T | 10,000 KG | 2.7 | 4.3 | 130 |
EBP-15T | 15,000 KG | 2.9 | 4.8 | 180 |
EBP-20T | 20,000 KG | 3.1 | 5.6 | 200 |
EBP-25T | 25,000 KG | 3.4 | 5.7 | 230 |
EBP-30T | 30,000 KG | 3.8 | 6.0 | 290 |
EBP-35T | 35,000 KG | 3.9 | 6.5 | 320 |
EBP-50T | 50,000 KG | 4.6 | 7.5 | 450 |
EBP-100T | 100,000 KG | 5.7 | 8.7 | 600 |
Note: The above size and weight are only for reference. We may change its parameters according to our design.
Our DOOWIN underwater air lift bags are designed, manufactured, tested, and certified in full compliance with IMCA D016 guidelines. Constructed using the highest quality SGS-certified PVC-coated fabric, they meet all requirements of the standard. Additionally, we can provide third-party certification from BV, ABS, or LR upon request.
DOOWIN is committed to providing high quality proof-load testing water weight bags and air lifting bags for our customers worldwide.
Inflatable buoyancy units can be used for surface marine salvage, pipelaying buoyancy floats, and vessel draught reduction.
The extended design combined with a smaller diameter can ensure that it provides a large buoyancy in shallow water.
Pillow-shaped enclosed flotation bags can float objects in extremely shallow water, utilizing upright or flat, outside or inside of structures.
Mono buoyancy units enable efficient pipeline/surface operations with time-saving single-point connections and wide-angle adaptability.
DOOWIN specializes in manufacturing high-performance underwater air buoyancy bags designed for marine salvage, buoyancy assistance, and emergency rescue operations. Crafted from durable, high-strength materials, our bags are engineered to withstand extreme underwater pressures and harsh environments. Available in multiple sizes and load capacities, they offer versatile solutions for lifting sunken objects, stabilizing submerged structures, or providing critical flotation support during rescue missions.
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